[10-Q] Jazz Pharmaceuticals plc Quarterly Earnings Report

Rhea-AI Filing Summary

Jazz Pharmaceuticals plc reported higher Q3 results while reshaping its portfolio and balance sheet. Total revenue was $1,126,107, up from $1,054,969 a year ago, driven by product sales. Quarterly net income reached $251,412 versus $215,055 last year as a large income tax benefit offset higher operating costs.

Year to date, the company booked a net loss, reflecting significant acquired in‑process R&D tied to the April acquisition of Chimerix for cash consideration of $944.2 million. Operating cash flow remained strong at $993,255 for the nine months. Cash and cash equivalents were $1,326,070 with investments of $720,000. Total debt stood at $5,361,161, following a voluntary $750.0 million term‑loan repayment in January; the 2026 notes now sit in current maturities.

Pipeline and portfolio updates include FDA approval in October 2025 expanding Zepzelca’s maintenance use in extensive‑stage SCLC, FDA accelerated approval of Modeyso in August 2025, and prior U.S./EU authorizations for Ziihera. In August 2025, Jazz licensed SAN2355 from Saniona with a $42.5 million upfront, expensed to IPR&D.

Insights

Biopharma equity analyst

Q3 revenue grew, cash flow solid; YTD loss driven by IPR&D.

Jazz delivered Q3 revenue of $1,126,107 and net income of $251,412, aided by a tax benefit, while operating expenses rose on SG&A and amortization. For the nine months, acquired IPR&D of $947,862 and the Chimerix asset acquisition weighed on earnings.

Liquidity comprised cash of $1,326,070 and investments of $720,000. Debt totaled $5,361,161 after a voluntary $750.0 million term-loan paydown; the 2026 notes move into current maturities, concentrating near-term obligations.

Recent approvals (Zepzelca maintenance in October 2025, Modeyso in August 2025) and the Saniona SAN2355 license ($42.5 million upfront) expand the portfolio. Actual impact depends on adoption, payer dynamics, and execution across neuroscience and oncology.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended September 30, 2025

or

☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from              to             

Commission File Number: 001-33500

JAZZ PHARMACEUTICALS PUBLIC LIMITED COMPANY

(Exact name of registrant as specified in its charter) 

Ireland			98-1032470
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)

Fifth Floor, Waterloo Exchange,

Waterloo Road, Dublin 4, Ireland D04 E5W7

011-353-1-634-7800

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class			Trading Symbol(s)			Name of each exchange on which registered
Ordinary shares, nominal value $0.0001 per share			JAZZ			The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

☒

Accelerated filer

☐

Non-accelerated filer

☐

Smaller reporting company

☐

Emerging growth company

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ☐ No ☒

As of October 29, 2025, 60,765,116 ordinary shares of the registrant, nominal value $0.0001 per share, were outstanding.

Table of Contents

JAZZ PHARMACEUTICALS PLC

QUARTERLY REPORT ON FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2025

INDEX

						Page
PART I – FINANCIAL INFORMATION
			Defined Terms and Products			3
Item 1.			Financial Statements			7
			Condensed Consolidated Balance Sheets – September 30, 2025 and December 31, 2024			7
			Condensed Consolidated Statements of Income (Loss) – Three and Nine Months Ended September 30, 2025 and 2024			8
			Condensed Consolidated Statements of Comprehensive Income (Loss) – Three and Nine Months Ended September 30, 2025 and 2024			9
			Condensed Consolidated Statements of Shareholders’ Equity – Three and Nine Months Ended September 30, 2025 and 2024			10
			Condensed Consolidated Statements of Cash Flows – Nine Months Ended September 30, 2025 and 2024			12
			Notes to Condensed Consolidated Financial Statements			13
Item 2.			Management’s Discussion and Analysis of Financial Condition and Results of Operations			34
Item 3.			Quantitative and Qualitative Disclosures About Market Risk			52
Item 4.			Controls and Procedures			52
PART II – OTHER INFORMATION
Item 1.			Legal Proceedings			54
Item 1A.			Risk Factors			54
Item 2.			Unregistered Sales of Equity Securities and Use of Proceeds			63
Item 6.			Exhibits			64
SIGNATURES						65

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Table of Contents

Defined Terms and Products

Defined terms

We use several terms in this Form 10-Q, including but not limited to those that are finance, regulation and disease-state related as well as names of other companies, which are given below.

Term			Description
2024 Notes			1.50% exchangeable senior notes due 2024
2026 Notes			2.00% exchangeable senior notes due 2026
2030 Notes			3.125% exchangeable senior notes due 2030
Aetna			Aetna Inc.
AG			authorized generic
ALL			acute lymphoblastic leukemia
Almaject			Almaject Inc., Alvogen, Inc., and Alvogen PB Research and Development LLC
Amended Credit Agreement			Credit Agreement amended to include the Repricing Amendment No. 1, the Repricing Amendment No. 2 and Amendment No. 3
Amended Revolving Credit Facility			Revolving credit facility amended to increase the Initial Revolving Credit Facility to $885.0 million and extend the maturity date
Amendment No. 3			amendment to the Credit Agreement entered into by Jazz Lux in November 2024
AML			acute myeloid leukemia
Amneal			Amneal Pharmaceuticals LLC
ANDA			abbreviated new drug application
API			active pharmaceutical ingredient
ASD			ASD Specialty Healthcare LLC
ASU			Accounting Standards Update
Avadel			Avadel Pharmaceuticals plc
Avadel Litigation			All claims relating to all disputes between the parties subject to the global settlement agreement dated October 21, 2025, with Avadel CNS Pharmaceuticals LLC and Flamel Ireland Limited, subsidiaries of Avadel Pharmaceuticals plc
BLA			Biologics License Application
BTC			biliary tract cancers
Chimerix			Chimerix, Inc.
Chimerix Acquisition			our acquisition of Chimerix on April 21, 2025
Chimerix Common Stock			the common stock, par value $0.001 per share, of Chimerix
Chimerix Shareholder Litigation			two suits filed in the Supreme Court of the State of New York, County of New York, by purported Chimerix shareholders against Chimerix and its Board of Directors, but which do not name any Jazz Pharmaceuticals parties
Chimerix Transaction Litigation			the Rosenthal Lawsuit as well as the Chimerix Shareholder Litigation
CHMP			Committee for Medicinal Products for Human Use
CMS			U.S. Centers for Medicare & Medicaid Services
CNX Therapeutics			CNX Therapeutics Limited
CODM			chief operating decision maker
COG			Children’s Oncology Group
Credit Agreement			Credit Agreement entered into on May 5, 2021, by and among us, Jazz Lux, and certain of our other subsidiaries, as borrowers, the lenders and issuing banks from time to time party thereto, Bank of America, N.A., as administrative agent and U.S. Bank Trust Company, National Association, as collateral trustee
DDI			drug-drug interaction
Dollar Term Loan			our former seven-year $3.1 billion term loan B facility under the Credit Agreement
DS			Dravet syndrome
EC			European Commission
EDS			excessive daytime sleepiness

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Term			Description
EEA			European Economic Area
Epidiolex ANDA Filers			Teva Pharmaceuticals, Inc.; Padagis US LLC; Apotex Inc.; API Pharma Tech LLC and InvaGen Pharmaceuticals, Inc.; Lupin Limited; Taro Pharmaceutical Industries Ltd.; Zenara Pharma Private Limited and Biophore Pharma, Inc.; MSN Laboratories Pvt. Ltd. and MSN Pharmaceuticals, Inc.; Alkem Laboratories Ltd.; and Ascent Pharmaceuticals, Inc.
ESPP			employee stock purchase plan
ESSDS			Express Scripts Specialty Distribution Services, Inc.
EU			European Union
Euro Term Loan			our now repaid seven-year €625.0 million term loan B facility under the Credit Agreement
Exchange Act			Securities Exchange Act of 1934, as amended
Exchangeable Senior Notes			our 2026 Notes and 2030 Notes
Fair value step-up expense			the acquisition accounting inventory fair value step-up expense
FASB			Financial Accounting Standards Board
FDA			U.S. Food and Drug Administration
Federal Opt-Out Plaintiffs			Humana Inc, Health Care Services Corporation, Molina Healthcare Inc., Blue Cross and Blue Shield of Florida and Health Options, Inc., collectively
Finance Act			the Finance (No. 2) Act 2023
FTC			Federal Trade Commission
GEA			gastroesophageal adenocarcinoma
Granules			Granules India Limited
GW			GW Pharmaceuticals plc
GW Acquisition			our acquisition of GW Pharmaceuticals plc in May 2021
HHS			U.S. Department of Health and Human Services
Hikma			Hikma Pharmaceuticals PLC
HSCT			post-hematopoietic stem-cell transplantation
IFNα			interferon alpha
IH			idiopathic hypersomnia
IM			intramuscular
Initial Revolving Credit Facility			our five-year $500.0 million revolving credit facility under the Credit Agreement entered into in May 2021
IPR&D			in-process research and development
IRA			Inflation Reduction Act of 2022
IRS			U.S. Internal Revenue Service
Jazz Investments			Jazz Investments I Limited
Jazz Lux			Jazz Financing Lux S.à.r.l.
JNDA			Japanese new drug application
KRAS			Kirsten rat sarcoma virus
LBL			lymphoblastic lymphoma
LGS			Lennox-Gastaut syndrome
Lupin			Lupin Inc.
McKesson			McKesson Corporation
MDS			Myelodysplastic Syndrome
MWT			Maintenance of Wakefulness Test
NDA			new drug application
New Repurchase Program			our share repurchase program announced on July 31, 2024
NHS			U.K. National Health Service
ODE			Orphan Drug Exclusivity in the U.S.
OECD			Organisation for Economic Co-operation and Development

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Term			Description
Old Repurchase Program			our share repurchase program authorized by our board of directors in November 2016
Orange Book			FDA’s publication “Approved Drug Products with Therapeutic Equivalence Evaluations”
Par			Par Pharmaceutical, Inc.
PBMs			pharmacy benefit managers
PharmaMar			Pharma Mar, S.A.
Pillar Two			the OECD framework proposal to implement a global minimum tax rate of 15% for large multinational corporations on a jurisdiction-by-jurisdiction basis
PRSUs			Performance-based restricted stock units
R&D			research and development
R/R			relapsed/refractory
Recommendation Statement			Chimerix's Schedule 14D-9 Solicitation/Recommendation Statement
Redx			Redx Pharma plc
REMS			risk evaluation and mitigation strategy
Repricing Amendment No.1			amendment to the Credit Agreement entered into by Jazz Lux in January 2024
Repricing Amendment No.2			amendment to the Credit Agreement entered into by Jazz Lux in July 2024
RK Pharma			RK Pharma, Inc., Apicore US LLC, Archis Pharma LLC, Vgyaan Pharmaceuticals LLC
Roche			F. Hoffmann-La Roche Ltd
Rosenthal Lawsuit			a lawsuit filed in the Supreme Court of the State of New York, County of Chemung, by David Rosenthal, purportedly on behalf of Chimerix Shareholders
RSUs			restricted stock units
Saniona			Saniona A/S
sBLA			supplemental Biologics License Application
SCLC			small cell lung cancer
SEC			U.S. Securities and Exchange Commission
Secured Notes			our issued $1.5 billion in aggregate principal amount of 4.375% senior secured notes, due 2029
sNDA			supplemental New Drug Application
Sumitomo			Sumitomo Pharma Co., Ltd
sVOD			severe VOD
T-DXd			trastuzumab deruxtecan
Tender Offer Documents			our Tender Offer Statement together with the Recommendation Statement
Term SOFR			U.S. dollar Secured Overnight Financing Rate
Teva			Teva Pharmaceuticals, Inc.
Tranche B-1 Dollar Term Loans			upon entry into the Repricing Amendment No.1, the then outstanding Dollar Term Loan was refinanced into a new tranche of U.S. dollar term loans
Tranche B-2 Dollar Term Loans			upon entry into the Repricing Amendment No.2, the then outstanding Tranche B-1 Dollar Term Loans were refinanced into a new tranche of U.S. dollar term loans
TSC			tuberous sclerosis complex
U.K.			United Kingdom
U.S.			United States of America
U.S. GAAP			U.S. generally accepted accounting principles
United Healthcare			United Healthcare Services, Inc.
USPTO			U.S. Patent and Trademark Office
VOD			veno-occlusive disease
WCLC			World Conference on Lung Cancer
Werewolf			Werewolf Therapeutics, Inc.
Xyrem Antitrust Litigation			collectively, a number of lawsuits filed from June 2020 to May 2022 on behalf of purported direct and indirect Xyrem purchasers

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Term			Description
Zepzelca ANDA Filers			Sandoz Inc., InvaGen Pharmaceuticals, Inc., CIPLA USA, Inc. CIPLA (EU) Limited, CIPLA Limited, Zydus Lifesciences Global FZE, Zydus Pharmaceuticals (USA) Inc., Zydus Lifesciences Limited, RK Pharma, Inc., Apicore US LLC, Archis Pharma LLC, Vgyaan Pharmaceuticals LLC, MSN Pharmaceuticals Inc., and MSN Laboratories PVT. LTD.
Zymeworks			Zymeworks Inc.

Products

The brand names of our products, our delivery devices and certain of our product candidates and their associated generic names are given below.

Term			Description
CombiPlex			CombiPlex® (delivery technology platform)
Defitelio			Defitelio® (defibrotide sodium), Defitelio® (defibrotide)
Epidiolex			Epidiolex® (cannabidiol) oral solution, Epidyolex® (the trade name in Europe and other countries outside the U.S. for Epidiolex)
Modeyso			ModeysoTM (dordaviprone)
Rylaze			Rylaze® (asparaginase erwinia chrysanthemi (recombinant)-rywn), Enrylaze® (the trade name in Europe and other countries outside the U.S. and Canada for Rylaze)
Sativex			Sativex® (nabiximols) oral solution
Suvecaltamide			Suvecaltamide (JZP385)
Vyxeos			Vyxeos® (daunorubicin and cytarabine) liposome for injection, Vyxeos® liposomal 44 mg/100 mg powder for concentrate for solution for infusion
Xyrem			Xyrem® (sodium oxybate) oral solution
Xywav			Xywav® (calcium, magnesium, potassium, and sodium oxybates) oral solution
Zepzelca			Zepzelca® (lurbinectedin)
Ziihera			Ziihera® (zanidatamab-hrii)

We own or have rights to various copyrights, trademarks, and trade names used in our business in the U.S. and/or other countries, including the following: Jazz Pharmaceuticals®, Xywav® (calcium, magnesium, potassium, and sodium oxybates) oral solution, Xyrem® (sodium oxybate) oral solution, Epidiolex® (cannabidiol) oral solution, Epidyolex® (the trade name in Europe and other countries outside the U.S. for Epidiolex), Rylaze® (asparaginase erwinia chrysanthemi (recombinant)-rywn), Enrylaze® (the trade name in Europe and other countries outside the U.S. and Canada for Rylaze), Zepzelca® (lurbinectedin), Defitelio® (defibrotide sodium), Defitelio® (defibrotide), Vyxeos® (daunorubicin and cytarabine) liposome for injection, Vyxeos® liposomal 44 mg/100 mg powder for concentrate for solution for infusion, ModeysoTM (dordaviprone), CombiPlex®, Sativex® (nabiximols) oral solution and Ziihera® (zanidatamab-hrii).

This Quarterly Report on Form 10-Q also includes trademarks, service marks and trade names of other companies. Trademarks, service marks and trade names appearing in this Quarterly Report on Form 10‑Q are the property of their respective owners.

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PART I – FINANCIAL INFORMATION

Item 1.Financial Statements

JAZZ PHARMACEUTICALS PLC

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)

			September 30, 2025						December 31, 2024
ASSETS
Current assets:
Cash and cash equivalents			$	1,326,070					$	2,412,864
Investments			720,000						580,000
Accounts receivable, net of allowances			764,364						716,765
Inventories			483,111						480,445
Prepaid expenses			146,892						177,411
Other current assets			315,441						261,543
Total current assets			3,755,878						4,629,028
Property, plant and equipment, net			188,913						173,413
Operating lease assets			61,204						53,582
Intangible assets, net			4,565,737						4,755,695
Goodwill			1,827,483						1,716,323
Deferred tax assets, net			846,168						560,245
Deferred financing costs			8,034						9,489
Other non-current assets			103,068						114,482
Total assets			$	11,356,485					$	12,012,257
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable			$	152,227					$	77,869
Accrued liabilities			1,001,556						910,947
Current portion of long-term debt			1,029,179						31,000
Income taxes payable			91,140						18,757
Total current liabilities			2,274,102						1,038,573
Long-term debt, less current portion			4,331,982						6,077,640
Operating lease liabilities, less current portion			53,426						38,938
Deferred tax liabilities, net			629,033						676,736
Other non-current liabilities			108,912						86,614
Commitments and contingencies (Note 10)
Shareholders’ equity:
Ordinary shares			6						6
Non-voting euro deferred shares			55						55
Capital redemption reserve			473						473
Additional paid-in capital			4,085,669						3,913,542
Accumulated other comprehensive loss			(569,898)						(947,667)
Retained earnings			442,725						1,127,347
Total shareholders’ equity			3,959,030						4,093,756
Total liabilities and shareholders’ equity			$	11,356,485					$	12,012,257

The accompanying notes are an integral part of these condensed consolidated financial statements.

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JAZZ PHARMACEUTICALS PLC

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS)

(In thousands, except per share amounts)

(Unaudited)

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Revenues:
Product sales, net			$	1,064,412					$	989,707					$	2,889,401					$	2,795,953
Royalties and contract revenues			61,695						65,262						180,259						184,824
Total revenues			1,126,107						1,054,969						3,069,660						2,980,777
Operating expenses:
Cost of product sales (excluding amortization of acquired developed technologies)			128,880						111,611						349,768						317,000
Selling, general and administrative			530,647						325,772						1,403,059						1,016,007
Research and development			198,203						199,919						568,827						643,500
Intangible asset amortization			168,368						157,457						484,919						468,410
Acquired in-process research and development			42,500						—						947,862						10,000
Total operating expenses			1,068,598						794,759						3,754,435						2,454,917
Income (loss) from operations			57,509						260,210						(684,775)						525,860
Interest expense, net			(48,576)						(58,702)						(149,645)						(186,841)
Foreign exchange gain (loss)			102						(701)						(1,910)						(1,887)
Income (loss) before income tax benefit and equity in loss of investees			9,035						200,807						(836,330)						337,132
Income tax benefit			(242,424)						(14,533)						(277,406)						(33,517)
Equity in loss of investees			47						285						675						1,644
Net income (loss)			$	251,412					$	215,055					$	(559,599)					$	369,005
Net income (loss) per ordinary share:
Basic			$	4.14					$	3.50					$	(9.18)					$	5.93
Diluted			$	4.08					$	3.42					$	(9.18)					$	5.63
Weighted-average ordinary shares used in per share calculations - basic			60,696						61,414						60,955						62,275
Weighted-average ordinary shares used in per share calculations - diluted			61,606						63,174						60,955						67,511

The accompanying notes are an integral part of these condensed consolidated financial statements.

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JAZZ PHARMACEUTICALS PLC

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(In thousands)

(Unaudited)

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Net income (loss)			$	251,412					$	215,055					$	(559,599)					$	369,005
Other comprehensive income (loss):
Foreign currency translation adjustments			(83,832)						291,367						378,854						241,218
Unrealized gain (loss) on cash flow hedging activities, net of income tax (benefit) expense of $35, $(1,727), $40 and $522 respectively			113						(5,197)						128						1,572
Gain on cash flow hedging activities reclassified from accumulated other comprehensive loss to interest expense, net of income tax expense of $129, $445, $380 and $1,342 respectively			(411)						(1,340)						(1,213)						(4,040)
Other comprehensive income (loss)			(84,130)						284,830						377,769						238,750
Total comprehensive income (loss)			$	167,282					$	499,885					$	(181,830)					$	607,755

The accompanying notes are an integral part of these condensed consolidated financial statements.

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JAZZ PHARMACEUTICALS PLC

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(In thousands)

(Unaudited)

			Ordinary Shares												Non-voting Euro Deferred												Capital Redemption Reserve						Additional Paid-in Capital						Accumulated Other Comprehensive Loss						Retained Earnings																		Total Equity
			Shares						Amount						Shares						Amount
Balance at December 31, 2024			60,631						$	6					4,000						$	55					$	473					$	3,913,542					$	(947,667)					$	1,127,347																	$	4,093,756
Issuance of ordinary shares in conjunction with exercise of share options			93						—						—						—						—						11,447						—						—																		11,447
Issuance of ordinary shares in conjunction with vesting of restricted stock units			811						—						—						—						—						—						—						—																		—
Issuance of ordinary shares in conjunction with vesting of performance-based restricted stock units			88						—						—						—						—						—						—						—																		—
Shares withheld for payment of employees' withholding tax liability			—						—						—						—						—						(67,163)						—						—																		(67,163)
Share-based compensation			—						—						—						—						—						67,335						—						—																		67,335
Other comprehensive income			—						—						—						—						—						—						162,057						—																		162,057
Net loss			—						—						—						—						—						—						—						(92,541)																		(92,541)
Balance at March 31, 2025			61,623						$	6					4,000						$	55					$	473					$	3,925,161					$	(785,610)					$	1,034,806																	$	4,174,891
Issuance of ordinary shares in conjunction with exercise of share options			1						—						—						—						—						—						—						—																		—
Issuance of ordinary shares under employee stock purchase plan			117						—						—						—						—						10,497						—						—																		10,497
Issuance of ordinary shares in conjunction with vesting of restricted stock units			41						—						—						—						—						—						—						—																		—
Shares withheld for payment of employees' withholding tax liability			—						—						—						—						—						(2,249)						—						—																		(2,249)
Share-based compensation			—						—						—						—						—						66,871						—						—																		66,871
Shares repurchased			(1,142)						—						—						—						—						—						—						(125,023)																		(125,023)
Other comprehensive income			—						—						—						—						—						—						299,842						—																		299,842
Net loss			—						—						—						—						—						—						—						(718,470)																		(718,470)
Balance at June 30, 2025			60,640						$	6					4,000						$	55					$	473					$	4,000,280					$	(485,768)					$	191,313																	$	3,706,359
Issuance of ordinary shares in conjunction with exercise of share options			7						—						—						—						—						733						—						—																		733
Issuance of ordinary shares in conjunction with vesting of restricted stock units			82						—						—						—						—						—						—						—																		—
Issuance of ordinary shares in conjunction with vesting of performance-based restricted stock units			11						—						—						—						—						—						—						—																		—
Shares withheld for payment of employees' withholding tax liability			—						—						—						—						—						(3,812)						—						—																		(3,812)
Share-based compensation			—						—						—						—						—						88,468						—						—																		88,468
Other comprehensive loss			—						—						—						—						—						—						(84,130)						—																		(84,130)
Net income			—						—						—						—						—						—						—						251,412																		251,412
Balance at September 30, 2025			60,740						$	6					4,000						$	55					$	473					$	4,085,669					$	(569,898)					$	442,725																	$	3,959,030

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JAZZ PHARMACEUTICALS PLC

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(In thousands)

(Unaudited)

			Ordinary Shares												Non-voting Euro Deferred												Capital Redemption Reserve						Additional Paid-in Capital						Accumulated Other Comprehensive Loss						Retained Earnings																		Total Equity
			Shares						Amount						Shares						Amount
Balance at December 31, 2023			62,255						$	6					4,000						$	55					$	473					$	3,699,954					$	(842,147)					$	878,656																	$	3,736,997
Issuance of ordinary shares in conjunction with exercise of share options			7						—						—						—						—						494						—						—																		494
Issuance of ordinary shares in conjunction with vesting of restricted stock units			686						—						—						—						—						—						—						—																		—
Issuance of ordinary shares in conjunction with vesting of performance-based restricted stock units			80						—						—						—						—						—						—						—																		—
Shares withheld for payment of employees' withholding tax liability			—						—						—						—						—						(49,296)						—						—																		(49,296)
Share-based compensation			—						—						—						—						—						63,131						—						—																		63,131
Other comprehensive loss			—						—						—						—						—						—						(40,247)						—																		(40,247)
Net loss			—						—						—						—						—						—						—						(14,618)																		(14,618)
Balance at March 31, 2024			63,028						$	6					4,000						$	55					$	473					$	3,714,283					$	(882,394)					$	864,038																	$	3,696,461
Issuance of ordinary shares in conjunction with exercise of share options			4						—						—						—						—						54						—						—																		54
Issuance of ordinary shares under employee stock purchase plan			122						—						—						—						—						10,886						—						—																		10,886
Issuance of ordinary shares in conjunction with vesting of restricted stock units			49						—						—						—						—						—						—						—																		—
Shares withheld for payment of employees' withholding tax liability			—						—						—						—						—						(2,847)						—						—																		(2,847)
Share-based compensation			—						—						—						—						—						56,738						—						—																		56,738
Shares repurchased			(1,458)						—						—						—						—						—						—						(161,428)																		(161,428)
Other comprehensive loss			—						—						—						—						—						—						(5,833)						—																		(5,833)
Net income			—						—						—						—						—						—						—						168,568																		168,568
Balance at June 30, 2024			61,745						$	6					4,000						$	55					$	473					$	3,779,114					$	(888,227)					$	871,178																	$	3,762,599
Issuance of ordinary shares in conjunction with exercise of share options			1						—						—						—						—						17						—						—																		17
Issuance of ordinary shares in conjunction with vesting of restricted stock units			69						—						—						—						—						—						—						—																		—
Shares withheld for payment of employees' withholding tax liability			—						—						—						—						—						(1,605)						—						—																		(1,605)
Share-based compensation			—						—						—						—						—						60,172						—						—																		60,172
Shares repurchased			(1,372)						—						—						—						—						—						—						(150,001)																		(150,001)
Other comprehensive income			—						—						—						—						—						—						284,830						—																		284,830
Net income			—						—						—						—						—						—						—						215,055																		215,055
Balance at September 30, 2024			60,443						$	6					4,000						$	55					$	473					$	3,837,698					$	(603,397)					$	936,232																	$	4,171,067

The accompanying notes are an integral part of these condensed consolidated financial statements.

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JAZZ PHARMACEUTICALS PLC

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited) 

			Nine Months Ended September 30,
			2025						2024
Operating activities
Net income (loss)			$	(559,599)					$	369,005
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Acquired in-process research and development			947,862						10,000
Intangible asset amortization			484,919						468,410
Share-based compensation			220,279						177,855
Acquisition accounting inventory fair value step-up adjustment			107,344						97,220
Depreciation			32,209						23,240
Non-cash interest expense			27,213						18,877
Provision for losses on accounts receivable and inventory			14,994						15,866
Deferred tax benefit			(381,662)						(205,972)
Other non-cash transactions			8,058						19,615
Changes in assets and liabilities:
Accounts receivable			(40,466)						(21,979)
Inventories			(93,761)						(26,877)
Prepaid expenses and other current assets			1,538						708
Operating lease assets			15,618						10,697
Other non-current assets			18,022						(9,544)
Accounts payable			68,823						(16,938)
Accrued liabilities			50,926						56,428
Income taxes payable			72,008						20,098
Operating lease liabilities, less current portion			(6,362)						(9,701)
Other non-current liabilities			5,292						320
Net cash provided by operating activities			993,255						997,328
Investing activities
Acquisition of investments			(1,320,175)						(835,125)
Asset acquisition, net of cash acquired			(858,053)						—
Acquisition of intangible assets			(55,000)						—
Acquired in-process research and development			(42,500)						(10,000)
Purchases of property, plant and equipment			(42,023)						(24,783)
Proceeds from maturity of investments			1,180,000						555,000
Net cash used in investing activities			(1,137,751)						(314,908)
Financing activities
Repayments of long-term debt			(773,250)						(23,250)
Share repurchases			(125,023)						(311,429)
Payment of employee withholding taxes related to share-based awards			(73,224)						(53,748)
Proceeds from employee equity incentive and purchase plans			22,677						11,451
Repayment of 2024 Notes			—						(575,000)
Net proceeds from issuance of 2030 Notes			—						980,767
Net cash provided by (used in) financing activities			(948,820)						28,791
Effect of exchange rates on cash and cash equivalents			6,522						614
Net increase (decrease) in cash and cash equivalents			(1,086,794)						711,825
Cash and cash equivalents, at beginning of period			2,412,864						1,506,310
Cash and cash equivalents, at end of period			$	1,326,070					$	2,218,135

The accompanying notes are an integral part of these condensed consolidated financial statements.

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JAZZ PHARMACEUTICALS PLC

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. The Company and Summary of Significant Accounting Policies

Jazz Pharmaceuticals plc is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families. We are dedicated to developing life-changing medicines for people with serious diseases - often with limited or no therapeutic options. We have a diverse portfolio of marketed medicines, including leading therapies for sleep disorders and epilepsy, and a growing portfolio of cancer treatments. Our patient-focused and science-driven approach powers pioneering research and development advancements across our robust pipeline of innovative therapeutics in oncology and neuroscience.

Our lead marketed products, listed below, are approved in countries around the world to improve patient care.

Neuroscience

•Xywav® (calcium, magnesium, potassium, and sodium oxybates) oral solution, a product approved by FDA in July 2020, and launched in the U.S. in November 2020 for the treatment of cataplexy or EDS in patients seven years of age and older with narcolepsy, and also approved by FDA in August 2021 for the treatment of IH in adults and launched in the U.S. in November 2021. Xywav contains 92% less sodium than Xyrem®. Xywav is also approved in Canada for the treatment of cataplexy in patients with narcolepsy.

•Epidiolex® (cannabidiol) oral solution, a product approved by FDA and launched in the U.S. in 2018 by GW and currently indicated for the treatment of seizures associated with LGS, DS, or TSC in patients one year of age or older; in the EU and Great Britain (where it is marketed as Epidyolex®) and other markets, it is approved for adjunctive treatment of seizures associated with LGS or DS, in conjunction with clobazam (EU and Great Britain only), in patients 2 years of age and older and for adjunctive treatment of seizures associated with TSC in patients 2 years of age and older.

Oncology

•Rylaze® (asparaginase erwinia chrysanthemi (recombinant)-rywn), a product approved by FDA in June 2021 and launched in the U.S. in July 2021 for use as a component of a multi-agent chemotherapeutic regimen for the treatment of ALL or LBL in adults and pediatric patients aged one month or older who have developed hypersensitivity to E. coli-derived asparaginase. In September 2023, the EC granted marketing authorization under the trade name Enrylaze®. This therapy is also approved in markets including Great Britain, Canada, Switzerland and Australia.

•Zepzelca® (lurbinectedin), a product approved by FDA in June 2020 under FDA's accelerated approval pathway and launched in the U.S. in July 2020 for the treatment of adult patients with metastatic SCLC with disease progression on or after platinum-based chemotherapy; approved by FDA in October 2025 in combination with atezolizumab or atezolizumab and hyaluronidase-tqjs as a maintenance treatment for adults with extensive-stage SCLC whose disease has not progressed after first-line induction therapy with atezolizumab, carboplatin and etoposide; in Canada, Zepzelca received conditional approval in September 2021 for the treatment of adults with Stage III or metastatic SCLC, who have progressed on or after platinum-containing therapy.

•Ziihera® (zanidatamab-hrii), a product approved by FDA in November 2024 under FDA’s accelerated approval pathway and launched in the U.S. in December 2024 for the treatment of adults with previously treated, unresectable or metastatic HER2-positive (IHC 3+) BTC, as detected by an FDA-approved test. In June 2025, the EC granted conditional marketing authorization for Ziihera® for the treatment of adults with unresectable locally advanced or metastatic HER2-positive (IHC3+) BTC previously treated with at least one prior line of systemic therapy.

•Modeyso™ (dordaviprone), a product approved by FDA in August 2025 under FDA's accelerated approval pathway for the treatment of adult and pediatric patients 1 year of age and older with diffuse midline glioma harboring an H3 K27M mutation with progressive disease following prior therapy.

In April 2025, we acquired Chimerix for a total cash consideration of $944.2 million. For further information regarding the Chimerix Acquisition, please see Note 2.

Throughout this Quarterly Report on Form 10-Q, unless otherwise indicated or the context otherwise requires, all references to “Jazz Pharmaceuticals,” “the registrant,” “the Company,” “we,” “us,” and “our” refer to Jazz Pharmaceuticals plc and its consolidated subsidiaries. Throughout this Quarterly Report on Form 10-Q, all references to “ordinary shares” refer to Jazz Pharmaceuticals plc’s ordinary shares.

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Basis of Presentation

These unaudited condensed consolidated financial statements have been prepared following the requirements of the U.S. Securities and Exchange Commission for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by U.S. GAAP can be condensed or omitted. The information included in this Quarterly Report on Form 10‑Q should be read in conjunction with our annual audited consolidated financial statements and accompanying notes included in our Annual Report on Form 10‑K for the year ended December 31, 2024.

In the opinion of management, these condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements and include all adjustments, consisting only of normal recurring adjustments, considered necessary for the fair presentation of our financial position and operating results. The results for the three and nine months ended September 30, 2025, are not necessarily indicative of the results to be expected for the year ending December 31, 2025, for any other interim period or for any future period.

Our significant accounting policies have not changed substantially from those previously described in our Annual Report on Form 10‑K for the year ended December 31, 2024.

These condensed consolidated financial statements include the accounts of Jazz Pharmaceuticals plc and our subsidiaries, and intercompany transactions and balances have been eliminated.

Our operating segment is reported in a manner consistent with the internal reporting provided to the CODM. Our CODM has been identified as our president and chief executive officer. We have determined that we operate in one business segment, which is the identification, development and commercialization of meaningful pharmaceutical products that address unmet medical needs. The CODM assesses performance and decides how to allocate resources for the segment based on net income (loss) and measure of segment assets which is reported on the condensed consolidated statements of income (loss) and condensed consolidated balance sheet.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures in the condensed consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and on assumptions believed to be reasonable under the circumstances. Actual results could differ materially from those estimates.

Adoption of New Accounting Standards

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740) - Improvements to Income Tax Disclosures”, which requires enhanced tax disclosures providing greater disaggregation of information in the Company's effective tax rate reconciliation and disaggregates income taxes paid by jurisdiction. The amendments are effective on a prospective basis, with the option to apply it retrospectively, for fiscal years beginning after December 15, 2024. The adoption of ASU 2023-09 will expand our income tax disclosures in our Annual Report on Form 10-K, but will have no impact on reported income tax (benefit) expense or related tax assets or liabilities.

Significant Risks and Uncertainties

Our financial condition, results of operations and growth prospects are also dependent on our ability to maintain or increase sales of our commercialized products, which is subject to many risks and there is no guarantee that we will be able to continue to successfully commercialize those products for their approved indications. In that regard, we expect that our business will continue to meaningfully depend on oxybate revenues; however, there is no guarantee that oxybate revenues will remain at current levels. In this regard, our ability to maintain oxybate revenues and realize the anticipated benefits from our investment in Xywav are subject to a number of risks and uncertainties including, without limitation, those related to the commercialization of Xywav for the treatment of IH in adults and adoption in that indication; competition from the introduction of two AG versions of high-sodium oxybate and a branded fixed-dose, high-sodium oxybate, Avadel’s Lumryz, for treatment of cataplexy and/or EDS in narcolepsy in the U.S. market, as well as potential future competition from additional AG versions of high-sodium oxybate and from generic versions of high-sodium oxybate, including a generic version of high-sodium oxybate from Amneal approved in September 2025, and from other competitors; increased pricing pressure from, changes in policies by, or restrictions on reimbursement imposed by, third party payors, including our ability to maintain adequate coverage and reimbursement for Xywav; increased rebates required to maintain access to our products; challenges to our intellectual property around Xywav and/or Xyrem, including from pending antitrust and intellectual property litigation; and continued acceptance of Xywav by physicians and patients. A significant decline in oxybate revenues could cause us to reduce our operating expenses

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or seek to raise additional funds and would have a material adverse effect on our business, financial condition, results of operations and growth prospects, including on our ability to acquire, in-license or develop new products to grow our business.

Our financial condition, results of operations and growth prospects are also dependent on our ability to maintain or increase sales of Epidiolex/Epidyolex in the U.S. and Europe, which is subject to many risks and there is no guarantee that we will be able to continue to successfully commercialize Epidiolex/Epidyolex for its approved indications. The commercial success of Epidiolex/Epidyolex depends on the extent to which patients and physicians accept and adopt Epidiolex/Epidyolex as a treatment for seizures associated with LGS, DS and TSC, and we do not know whether our or others’ estimates in this regard will be accurate. Physicians may not prescribe Epidiolex and patients may be unwilling to use Epidiolex/Epidyolex if coverage is not provided or reimbursement is inadequate to cover a significant portion of the cost. Additionally, any negative development for Epidiolex/Epidyolex in the market, in clinical development for additional indications, or in regulatory processes in other jurisdictions, may adversely impact the commercial results and potential of Epidiolex/Epidyolex.

In addition to risks related specifically to Xywav and Epidiolex/Epidyolex, we are subject to other challenges and risks related to successfully commercializing a portfolio of oncology products and other neuroscience products, and other risks specific to our business and our ability to execute on our strategy, as well as risks and uncertainties common to companies in the pharmaceutical industry with development and commercial operations, including, without limitation, risks and uncertainties associated with: pharmaceutical product development, ongoing clinical research activity and related outcomes; obtaining regulatory approval of our late-stage product candidates; effectively commercializing our approved products such as Rylaze, Zepzelca, Ziihera and Modeyso; obtaining and maintaining adequate coverage and reimbursement for our products; contracting and rebates to pharmacy benefit managers and similar organizations that reduce our net revenue; increasing scrutiny of pharmaceutical product pricing and resulting changes in healthcare laws and policy; market acceptance; regulatory concerns with controlled substances generally and the potential for abuse; future legislation; action by the U.S. Federal Government authorizing the sale, distribution, use, and insurance reimbursement of non-FDA approved cannabinoid products; delays or problems in the supply of our products; loss of single source suppliers or failure to comply with manufacturing regulations; delays or problems with third parties that are part of our manufacturing and supply chain; identifying, acquiring or in-licensing additional products or product candidates; our ability to realize the anticipated benefits of acquired or in-licensed products or product candidates, such as Ziihera and Modeyso, at the expected levels, with the expected costs and within the expected timeframe; the challenges of protecting and enhancing our intellectual property rights; complying with applicable regulatory requirements; the impact of new or increased tariffs and escalating trade tensions; and possible restrictions on our ability and flexibility to pursue certain future opportunities as a result of our substantial outstanding debt obligations.

Concentrations of Risk

Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, investments and derivative contracts. Our investment policy permits investments in U.S. federal government and federal agency securities, corporate bonds or commercial paper issued by U.S. corporations, money market instruments, certain qualifying money market mutual funds, certain repurchase agreements, and tax-exempt obligations of U.S. states, agencies and municipalities and places restrictions on credit ratings, maturities, and concentration by type and issuer. We are exposed to credit risk in the event of a default by the financial institutions holding our cash, cash equivalents and investments to the extent recorded on the balance sheet.

We manage our foreign currency transaction risk and interest rate risk within specified guidelines through the use of derivatives. All of our derivative instruments are utilized for risk management purposes, and we do not use derivatives for speculative trading purposes. As of September 30, 2025 and December 31, 2024, we had foreign exchange forward contracts with notional amounts totaling $398.0 million and $461.2 million, respectively. As of September 30, 2025 and December 31, 2024, the outstanding foreign exchange forward contracts had a net liability fair value of $2.9 million and $7.9 million, respectively. As of September 30, 2025 and December 31, 2024, we had interest rate swap contracts with notional amounts totaling $500.0 million. As of September 30, 2025 and December 31, 2024, these outstanding interest rate swap contracts had a net liability fair value of $0.4 million and a net asset fair value of $1.0 million, respectively. The counterparties to these contracts are large multinational commercial banks, and we believe the risk of nonperformance is not significant.

We are also subject to credit risk from our accounts receivable related to our product sales. We monitor our exposure within accounts receivable and record a reserve against uncollectible accounts receivable as necessary. We extend credit to pharmaceutical wholesale distributors and specialty pharmaceutical distribution companies, primarily in the U.S., and to other international distributors and hospitals. Customer creditworthiness is monitored and collateral is not required. We monitor economic conditions in certain European countries which may result in variability of the timing of cash receipts and an increase in the average length of time that it takes to collect accounts receivable outstanding. Historically, we have not experienced significant credit losses on our accounts receivable and, as of September 30, 2025 and December 31, 2024, allowances on receivables were not material. As of September 30, 2025, five customers accounted for 83% of gross accounts receivable, including ESSDS, which accounted for 41% of gross accounts receivable, ASD, which accounted for 16% of gross accounts

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receivable and McKesson, which accounted for 12% of gross accounts receivable. As of December 31, 2024, five customers accounted for 80% of gross accounts receivable, including ESSDS, which accounted for 39% of gross accounts receivable, ASD, which accounted for 15% of gross accounts receivable and McKesson, which accounted for 13% of gross accounts receivable.

We depend on single source suppliers for most of our products, product candidates and their APIs. With respect to our oxybate products, the API is manufactured for us by a single source supplier and the finished products are manufactured both by us in our facility in Athlone, Ireland and by our U.S.-based supplier, which is certified to produce Xyrem and Xywav.

Recent Accounting Pronouncements

In November 2024, the FASB issued ASU 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-04) - Disaggregation of Income Statement Expenses”, which requires additional disclosure in the notes to the financial statements of the nature of certain expenses included in the income statement. The amendments are effective on a prospective basis, with the option to apply them retrospectively, for fiscal years beginning after December 15, 2026. We are currently evaluating the impact of adopting this new accounting guidance.

In November 2024, the FASB issued ASU 2024-04, “Induced Conversions of Convertible Debt Instruments”, which clarifies the requirements for determining whether certain settlements of convertible debt instruments should be accounted for as an induced conversion or extinguishment of convertible debt. The amendments are effective on a prospective basis, with the option to apply them retrospectively, for fiscal years beginning after December 15, 2025. We are currently evaluating the impact of adopting this new accounting guidance.

In September 2025, the FASB issued ASU 2025-06, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”, which modernizes the recognition and disclosure framework for internal-use software costs, removing the previous “development stage” model and introducing a more judgment-based approach. ASU 2025-06 is effective for the Company for annual reporting periods beginning with the fiscal year ending December 15, 2027 and for interim reporting periods beginning in that fiscal year. We are currently evaluating the impact that this update may have on our consolidated financial statements.

2. License Agreement and Asset Acquisition

License Agreement

In August 2025, we entered into a global license agreement with Saniona to obtain exclusive worldwide rights to develop SAN2355, a highly differentiated, subtype-selective Kv7.2/Kv7.3 activator in preclinical development for epilepsy and other potential indications, designed to overcome the limitations of non-selective Kv7-targeting compounds. Under the terms of the agreement, we made an upfront payment of $42.5 million to Saniona, which was recorded as acquired IPR&D expense in our consolidated statements of income (loss) for the three and nine months ended September 30, 2025. Saniona is eligible to receive development, regulatory and commercial milestone payments of up to $992.5 million and, if SAN2355 is approved, a tiered, mid-single digit to low-double digit royalty on our net sales of SAN2355.

Asset Acquisition

In April 2025, we acquired the entire issued share capital of Chimerix at a price of $8.55 per share, payable in cash at closing, representing a total cash consideration of $944.2 million, funded with our cash and cash equivalents. As a result of this, Chimerix became an indirect wholly owned subsidiary of the Company. The acquisition of Chimerix was accounted for as an asset acquisition because it did not meet the definition of a business.

The total consideration paid and the allocation to assets acquired and liabilities assumed was (in thousands):

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Consideration
Cash consideration to acquire Chimerix’s outstanding common stock			$	802,023
Cash consideration for Chimerix’s outstanding equity awards			142,131
Total cash consideration paid to Chimerix			944,154
Transaction costs			13,237
Total consideration			$	957,391
Assets Acquired and Liabilities Assumed
Cash			$	99,338
In-process research and development			905,362
Accrued liabilities			(53,066)
Other assets and liabilities			5,757
Total net assets acquired			$	957,391

The value attributed to in-process research and development related to Modeyso and was expensed as it was determined to have no alternative future use at the time of the acquisition.

3. Cash and Available-for-Sale Securities

Cash, cash equivalents and investments consisted of the following (in thousands): 

			September 30, 2025
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Estimated Fair Value						Cash and Cash Equivalents						Investments
Cash			$	712,772					$	—					$	—					$	712,772					$	712,772					$	—
Time deposits			810,000						—						—						810,000						90,000						720,000
Money market funds			523,298						—						—						523,298						523,298						—
Totals			$	2,046,070					$	—					$	—					$	2,046,070					$	1,326,070					$	720,000

			December 31, 2024
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Estimated Fair Value						Cash and Cash Equivalents						Investments
Cash			$	948,894					$	—					$	—					$	948,894					$	948,894					$	—
Time deposits			790,000						—						—						790,000						210,000						580,000
Money market funds			1,253,970						—						—						1,253,970						1,253,970						—
Totals			$	2,992,864					$	—					$	—					$	2,992,864					$	2,412,864					$	580,000

Cash equivalents and investments are considered available-for-sale securities. We use the specific-identification method for calculating realized gains and losses on securities sold and include them in interest expense, net in the condensed consolidated statements of income (loss). Our investment balances represent time deposits with original maturities of greater than three months and less than one year. Interest income from available-for-sale securities was $18.6 million and $65.3 million in the three and nine months ended September 30, 2025, respectively, and $26.0 million and $74.6 million in the three and nine months ended September 30, 2024, respectively.

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4. Fair Value Measurement

The following table summarizes, by major security type, our available-for-sale securities and derivative contracts as of September 30, 2025 and December 31, 2024, that were measured at fair value on a recurring basis and were categorized using the fair value hierarchy (in thousands): 

			September 30, 2025																		December 31, 2024
			Quoted Prices in Active Markets for Identical Assets (Level 1)						Significant Other Observable Inputs (Level 2)												Total Estimated Fair Value						Quoted Prices in Active Markets for Identical Assets (Level 1)						Significant Other Observable Inputs (Level 2)												Total Estimated Fair Value
Assets:
Available-for-sale securities:
Money market funds			$	523,298					$	—											$	523,298					$	1,253,970					$	—											$	1,253,970
Time deposits			—						810,000												810,000						—						790,000												790,000
Foreign exchange forward contracts			—						1,715												1,715						—						2,250												2,250
Interest rate contracts			—						4												4						—						991												991
Totals			$	523,298					$	811,719											$	1,335,017					$	1,253,970					$	793,241											$	2,047,211
Liabilities:
Foreign exchange forward contracts			$	—					$	4,663											$	4,663					$	—					$	10,198											$	10,198
Interest rate contracts			—						439												439						—						—												—
Totals			$	—					$	5,102											$	5,102					$	—					$	10,198											$	10,198

As of September 30, 2025 and December 31, 2024, our available-for-sale securities included money market funds and time deposits and their carrying values were approximately equal to their fair values. Money market funds were measured using quoted prices in active markets, which represent Level 1 inputs and time deposits were measured at fair value using Level 2 inputs. Level 2 inputs are obtained from various third party data providers and represent quoted prices for similar assets in active markets, or these inputs were derived from observable market data, or if not directly observable, were derived from or corroborated by other observable market data.

Our derivative assets and liabilities include interest rate and foreign exchange derivatives that are measured at fair value using observable market inputs such as forward rates, interest rates, our own credit risk as well as an evaluation of our counterparties’ credit risks. Based on these inputs, the derivative assets and liabilities are classified within Level 2 of the fair value hierarchy.

There were no transfers between the different levels of the fair value hierarchy in 2025 or 2024.

As of September 30, 2025 and December 31, 2024, the carrying amount of investments measured using the measurement alternative for equity investments without a readily determinable fair value was $4.3 million. The carrying amount, which is recorded within other non-current assets, is based on the latest observable transaction price.

As of September 30, 2025 the estimated fair values of the 2026 Notes, the 2030 Notes, the Secured Notes and the Tranche B-2 Dollar Term Loans were $1.1 billion, $1.2 billion, $1.5 billion and $1.9 billion, respectively. As of December 31, 2024, the estimated fair values of the 2026 Notes, the 2030 Notes, the Secured Notes and the Tranche B-2 Dollar Term Loans were $1.0 billion, $1.1 billion, $1.4 billion and $2.7 billion, respectively. The fair values of each of these debt facilities was estimated using quoted market prices obtained from brokers (Level 2).

5. Derivative Instruments and Hedging Activities

We are exposed to certain risks arising from operating internationally, including fluctuations in foreign exchange rates primarily related to the translation of sterling and euro denominated net monetary liabilities, including intercompany balances, held by subsidiaries with a U.S. dollar functional currency and fluctuations in interest rates on our outstanding term loan borrowings. We manage these exposures within specified guidelines through the use of derivatives. All of our derivative instruments are utilized for risk management purposes, and we do not use derivatives for speculative trading purposes.

We enter into foreign exchange forward contracts, with durations of up to 12 months, designed to limit the exposure to fluctuations in foreign exchange rates related to the translation of certain non-U.S. dollar denominated liabilities, including intercompany balances. Hedge accounting is not applied to these derivative instruments as gains and losses on these hedge transactions are designed to offset gains and losses on underlying balance sheet exposures. As of September 30, 2025 and

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December 31, 2024, the notional amount of foreign exchange contracts where hedge accounting is not applied was $398.0 million and $461.2 million, respectively.

The foreign exchange gain (loss) in our condensed consolidated statements of income (loss) included the following gains (losses) associated with foreign exchange contracts not designated as hedging instruments (in thousands):

			Three Months Ended September 30,												Nine Months Ended September 30,
Foreign Exchange Forward Contracts:			2025						2024						2025						2024
Gain (loss) recognized in foreign exchange gain (loss)			$	(6,822)					$	14,396					$	14,178					$	9,485

To achieve a desired mix of floating and fixed interest rates on our variable rate debt, we entered into interest rate swap agreements in April 2023, which are effective until April 2026. These agreements hedge contractual term loan interest rates. As of September 30, 2025, the interest rate swap agreements had a notional amount of $500.0 million. As a result of these agreements, the interest rate on a portion of our term loan borrowings is fixed at 3.9086%, plus the borrowing spread, until April 30, 2026.

The impact on accumulated other comprehensive loss and earnings from derivative instruments that qualified as cash flow hedges was as follows (in thousands):

			Three Months Ended September 30,												Nine Months Ended September 30,
Interest Rate Contracts:			2025						2024						2025						2024
Gain (loss) recognized in accumulated other comprehensive loss, net of tax			$	113					$	(5,197)					$	128					$	1,572
Gain reclassified from accumulated other comprehensive loss to interest expense, net of tax			(411)						(1,340)						(1,213)						(4,040)

Assuming no change in the Term SOFR based interest rates from market rates as of September 30, 2025, $0.3 million of losses, net of tax, recognized in accumulated other comprehensive loss will be reclassified to earnings over the next 12 months.

The cash flow effects of our derivative contracts for the nine months ended September 30, 2025 and 2024 are included within net cash provided by operating activities in the condensed consolidated statements of cash flows.

The following tables summarize the fair value of outstanding derivatives (in thousands):

			Classification			September 30, 2025						December 31, 2024
Assets
Derivatives designated as hedging instruments:
Interest rate contracts			Other current assets			$	4					$	959
			Other non-current assets			—						32
Derivatives not designated as hedging instruments:
Foreign exchange forward contracts			Other current assets			1,715						2,250
Total fair value of derivative asset instruments						$	1,719					$	3,241
Liabilities
Derivatives designated as hedging instruments:
Interest rate contracts			Accrued liabilities			$	439					$	—
Derivatives not designated as hedging instruments:
Foreign exchange forward contracts			Accrued liabilities			4,663						10,198
Total fair value of derivative liability instruments						$	5,102					$	10,198

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Although we do not offset derivative assets and liabilities within our condensed consolidated balance sheets, our International Swap and Derivatives Association agreements provide for net settlement of transactions that are due to or from the same counterparty upon early termination of the agreement due to an event of default or other termination event. The following table summarizes the potential effect on our condensed consolidated balance sheets of offsetting our interest rate and foreign exchange forward contracts subject to such provisions (in thousands):

			September 30, 2025
			Gross Amounts of Recognized Assets/ Liabilities						Gross Amounts Offset in the Consolidated Balance Sheet						Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet						Gross Amounts Not Offset in the Consolidated Balance Sheet
Description																					Derivative Financial Instruments						Cash Collateral Received (Pledged)						Net Amount
Derivative assets			$	1,719					$	—					$	1,719					$	(1,719)					$	—					$	—
Derivative liabilities			(5,102)						—						(5,102)						1,719						—						(3,383)

			December 31, 2024
			Gross Amounts of Recognized Assets/ Liabilities						Gross Amounts Offset in the Consolidated Balance Sheet						Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet						Gross Amounts Not Offset in the Consolidated Balance Sheet
Description																					Derivative Financial Instruments						Cash Collateral Received (Pledged)						Net Amount
Derivative assets			$	3,241					$	—					$	3,241					$	(2,910)					$	—					$	331
Derivative liabilities			(10,198)						—						(10,198)						2,910						—						(7,288)

6. Inventories

Inventories consisted of the following (in thousands): 

			September 30, 2025						December 31, 2024
Raw materials			$	22,066					$	20,161
Work in process			298,033						311,752
Finished goods			163,012						148,532
Total inventories			$	483,111					$	480,445

As of September 30, 2025 and December 31, 2024, inventories included $95.2 million and $191.2 million, respectively, related to the purchase accounting inventory fair value step-up on inventory acquired as part of our GW Acquisition.

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7. Goodwill and Intangible Assets

The gross carrying amount of goodwill was as follows (in thousands):

Balance at December 31, 2024			$	1,716,323
Foreign exchange			111,160
Balance at September 30, 2025			$	1,827,483

The gross carrying amounts and net book values of our intangible assets were as follows (in thousands): 

			September 30, 2025																								December 31, 2024
			Remaining Weighted- Average Useful Life (In years)						Gross Carrying Amount						Accumulated Amortization						Net Book Value						Gross Carrying Amount						Accumulated Amortization						Net Book Value
Acquired developed technologies			7.1						$	8,170,408					$	(3,604,671)					$	4,565,737					$	7,699,423					$	(2,943,728)					$	4,755,695
Manufacturing contracts			—						12,568						(12,568)						—						11,121						(11,121)						—
Trademarks			—						2,903						(2,903)						—						2,868						(2,868)						—
Total finite-lived intangible assets									$	8,185,879					$	(3,620,142)					$	4,565,737					$	7,713,412					$	(2,957,717)					$	4,755,695

The increase in the gross carrying amount of intangible assets as of September 30, 2025, compared to December 31, 2024, primarily relates to the positive impact of foreign currency translation adjustments primarily due to the strengthening of sterling against the U.S. dollar.

The assumptions and estimates used to determine future cash flows and remaining useful lives of our intangible and other long-lived assets are complex and subjective. They can be affected by various factors, including external factors, such as industry and economic trends, and internal factors such as changes in our business strategy and our forecasts for specific product lines.

Based on finite-lived intangible assets recorded as of September 30, 2025, and assuming the underlying assets will not be impaired and that we will not change the expected lives of the assets, future amortization expenses were estimated as follows (in thousands): 

Year Ending December 31,			Estimated Amortization Expense
2025 (remainder)			$	168,558
2026			671,723
2027			663,324
2028			640,152
2029			638,418
Thereafter			1,783,562
Total			$	4,565,737

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8. Certain Balance Sheet Items

Property, plant and equipment consisted of the following (in thousands):

			September 30, 2025						December 31, 2024
Manufacturing equipment and machinery			$	95,877					$	87,451
Land and buildings			73,488						71,902
Computer software			60,816						42,635
Leasehold improvements			60,740						70,201
Construction-in-progress			38,872						34,493
Computer equipment			21,180						20,137
Furniture and fixtures			9,153						8,551
Subtotal			360,126						335,370
Less accumulated depreciation and amortization			(171,213)						(161,957)
Property, plant and equipment, net			$	188,913					$	173,413

Accrued liabilities consisted of the following (in thousands):

			September 30, 2025						December 31, 2024
Rebates and other sales deductions			$	428,843					$	342,717
Employee compensation and benefits			148,802						153,133
Accrued litigation settlement			90,000						—
Clinical trial accruals			49,469						49,962
Accrued royalties			36,774						36,802
Sales return reserve			31,323						26,428
Inventory-related accruals			27,947						25,509
Consulting and professional services			27,349						26,221
Accrued interest			21,474						41,626
Selling and marketing accruals			21,375						26,981
Accrued development expenses			16,616						23,099
Current portion of lease liabilities			13,938						14,779
Accrued construction-in-progress			7,431						10,061
Derivative instrument liabilities			5,102						10,198
Accrued collaboration expenses			1,400						18,005
Accrued milestones			—						27,500
Other			73,713						77,926
Total accrued liabilities			$	1,001,556					$	910,947

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9. Debt

The following table summarizes the carrying amount of our indebtedness (in thousands):

			September 30, 2025						December 31, 2024
2026 Notes			$	1,000,000					$	1,000,000
Unamortized - debt issuance costs			(1,821)						(3,747)
2026 Notes, net			998,179						996,253
2030 Notes			1,000,000						1,000,000
Unamortized - debt issuance costs			(16,865)						(19,135)
2030 Notes, net			983,135						980,865
Secured Notes			1,486,385						1,483,841
Term Loan (1)			1,893,462						2,647,681
Total debt			5,361,161						6,108,640
Less current portion (2)			1,029,179						31,000
Total long-term debt			$	4,331,982					$	6,077,640

________________________

(1) In January 2025, we made a voluntary repayment on the Tranche B-2 Dollar Term Loan totaling $750.0 million.

(2) Balance as of September 30, 2025 includes the 2026 Notes since they mature in June 2026.

Exchangeable Senior Notes

The Exchangeable Senior Notes were issued by Jazz Investments, or the Issuer, a 100%-owned finance subsidiary of Jazz Pharmaceuticals plc. The Exchangeable Senior Notes are senior unsecured obligations of the Issuer and are fully and unconditionally guaranteed on a senior unsecured basis by Jazz Pharmaceuticals plc. No subsidiary of Jazz Pharmaceuticals plc guaranteed the Exchangeable Senior Notes. Subject to certain local law restrictions on payment of dividends, among other things, and potential negative tax consequences, we are not aware of any significant restrictions on the ability of Jazz Pharmaceuticals plc to obtain funds from the Issuer or Jazz Pharmaceuticals plc’s other subsidiaries by dividend or loan, or any legal or economic restrictions on the ability of the Issuer or Jazz Pharmaceuticals plc’s other subsidiaries to transfer funds to Jazz Pharmaceuticals plc in the form of cash dividends, loans or advances. There is no assurance that in the future such restrictions will not be adopted.

In September 2024, Jazz Investments completed a private placement of $1.0 billion aggregate principal amount of the 2030 Notes. The 2030 Notes are accounted for as a single liability measured at its amortized cost. The total liability is reflected net of issuance costs of $19.2 million which will be amortized over the term of the 2030 Notes. The effective interest rate of the 2030 Notes is 3.47%. During the three months ended September 30, 2025, we recognized interest expense of $8.7 million, of which $7.8 million related to the contractual coupon rate and $0.9 million related to the amortization of debt issuance costs. During the nine months ended September 30, 2025, we recognized interest expense of $25.7 million, of which $23.4 million related to the contractual coupon rate and $2.3 million related to the amortization of debt issuance costs. During the three and nine months ended September 30, 2024, we recognized interest expense of $2.3 million, of which $2.2 million related to the contractual coupon rate and $0.1 million related to the amortization of debt issuance costs.

The total liability of the 2026 Notes is reflected net of issuance costs of $15.3 million which will be amortized over the term of the 2026 Notes. The effective interest rate of the 2026 Notes is 2.26%. During the three months ended September 30, 2025 and 2024, we recognized interest expense of $5.7 million, of which $5.0 million related to the contractual coupon rate and $0.7 million related to the amortization of debt issuance costs. During the nine months ended September 30, 2025 and 2024, we recognized interest expense of $16.8 million, of which $15.0 million related to the contractual coupon rate and $1.8 million related to the amortization of debt issuance costs.

On August 15, 2024, the maturity date for the 2024 Notes, we repaid the $575.0 million aggregate principal amount, plus accrued and unpaid interest thereon. The effective interest rate of the 2024 Notes was 1.79%. During the three months ended September 30, 2024, we recognized interest expense of $1.3 million, of which $1.0 million related to the contractual coupon rate and $0.3 million related to the amortization of debt issuance costs. During the nine months ended September 30, 2024, we

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recognized interest expense of $6.4 million, of which $5.3 million related to the contractual coupon rate and $1.1 million related to the amortization of debt issuance costs.

Maturities

Scheduled maturities with respect to our long-term debt principal balances outstanding as of September 30, 2025 were as follows (in thousands):

Year Ending December 31,			Scheduled Long-Term Debt Maturities
2025 (remainder)			$	7,750
2026			1,031,000
2027			31,000
2028			1,848,500
2029			1,500,000
Thereafter			1,000,000
Total			$	5,418,250

10. Commitments and Contingencies

Indemnification

In the normal course of business, we enter into agreements that contain a variety of representations and warranties and provide for general indemnification, including indemnification associated with product liability or infringement of intellectual property rights. Our exposure under these agreements is unknown because it involves future claims that may be made but have not yet been made against us. To date, we have not paid any claims or been required to defend any action related to these indemnification obligations.

We have agreed to indemnify our executive officers, directors and certain other employees for losses and costs incurred in connection with certain events or occurrences, including advancing money to cover certain costs, subject to certain limitations. The maximum potential amount of future payments we could be required to make under the indemnification obligations is unlimited; however, we maintain insurance policies that may limit our exposure and may enable us to recover a portion of any future amounts paid. Assuming the applicability of coverage, the willingness of the insurer to assume coverage, and subject to certain retention, loss limits and other policy provisions, we believe the fair value of these indemnification obligations is not significant. Accordingly, we did not recognize any liabilities relating to these obligations as of September 30, 2025 and December 31, 2024. No assurances can be given that the covering insurers will not attempt to dispute the validity, applicability, or amount of coverage without expensive litigation against these insurers, in which case we may incur substantial liabilities as a result of these indemnification obligations.

Legal Proceedings

We are involved in legal proceedings, including the following matters:

Xyrem Antitrust Litigation

From June 2020 to May 2022, the Xyrem Antitrust Litigation was filed on behalf of purported direct and indirect Xyrem purchasers, alleging that the patent litigation settlement agreements we entered with generic drug manufacturers who had filed ANDAs violate state and federal antitrust and consumer protection laws. The Xyrem Antitrust Litigation was consolidated for multi-district litigation in the United States District Court for the Northern District of California (the “Court”), as previously disclosed in the notes to our consolidated financial statements for the year ended December 31, 2024 included in our Annual Report on Form 10-K for the year ended December 31, 2024, and the notes to our unaudited condensed consolidated financial statements for the quarters ended March 31, 2025 and June 30, 2025 included in our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025 and June 30, 2025, respectively. As of the date of this filing, pursuant to the settlement agreements described below, we have resolved the entirety of the Xyrem Antitrust Litigation.

On April 7, 2025, Jazz Pharmaceuticals Ireland Limited, our wholly-owned subsidiary, entered into a class settlement agreement with the class of indirect Xyrem purchasers to settle all claims of participating class members against the Company with respect to our actions leading up to, and entering into, patent litigation settlement agreements with the ANDA filers.

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Pursuant to the class settlement agreement, which was entered into with counsel representing the class representatives, we agreed to pay a total of $145.0 million in a lump sum. The class settlement agreement, in which we deny all alleged wrongdoing, also includes specified releases by class members of Jazz and its past, present and future affiliates, directors, officers, employees and other related parties, for all conduct concerning any of the matters alleged, or that could have been alleged, in the lawsuit. Plaintiffs who affirmatively opt out of the class will not be bound by the release and will not receive any settlement proceeds. Additionally, the class settlement agreement grants us the right to rescind the settlement agreement in the event an agreed upon percentage based on Xyrem purchases or payments made by potential class members that opt out. This settlement, if finalized on the agreed-upon terms, will resolve the majority of claims at issue in the multidistrict litigation. If we terminate the class settlement agreement, we intend to defend against these claims vigorously. We also remain confident in our defenses to the other claims brought by plaintiffs described above, including that the patent settlement agreements at issue were and are pro-competitive, and intend to continue to vigorously defend against these claims.

The Court held a preliminary approval hearing regarding the class settlement agreement on May 15, 2025, and granted the motion for preliminary approval on May 16, 2025. The Court held a final approval hearing regarding the class settlement on October 23, 2025 and approved the class settlement agreement on October 27, 2025.

On May 20, 2025, Jazz Pharmaceuticals Ireland Limited entered into a settlement agreement with United Healthcare to settle all of United Healthcare’s claims against us with respect to our actions leading up to, and entering into, patent litigation settlement agreements with the ANDA filers. Pursuant to that settlement agreement, on June 23, 2025, United Healthcare filed a motion for voluntary dismissal with prejudice of its claims against us. The Court granted United Healthcare’s motion on July 16, 2025. The terms of the settlement between Jazz Pharmaceuticals Ireland Limited and United Healthcare are confidential.

On August 29, 2025, Jazz Pharmaceuticals Ireland entered into a settlement agreement with the Federal Opt-Out Plaintiffs and Aetna Inc. to settle all of the Federal Opt-Out Plaintiffs’ and Aetna's claims against us with respect to our actions leading up to, and entering into, patent litigation settlement agreements with the ANDA filers. Pursuant to the settlement agreement, on September 29, 2025, Aetna filed a Request for Dismissal with prejudice of its claims against us. On September 30, 2025, the Court dismissed Aetna’s claims. On September 30, 2025, the Federal Opt-Out Plaintiffs filed a motion for voluntary dismissal with prejudice of their claims against us. The Court granted the Federal Opt-Out Plaintiffs’ motion on September 30, 2025. On October 7, 2025, we, Hikma, and Aetna filed a stipulation for voluntary dismissal of Aetna’s pending appeal to the Ninth Circuit. On October 10, 2025, the Ninth Circuit dismissed Aetna’s appeal. The terms of the settlement agreement between Jazz Pharmaceuticals Ireland Limited and the Federal Opt-Out Plaintiffs and Aetna are confidential.

During the three and nine months ended September 30, 2025, we recognized expenses of $61.5 million and $233.5 million, respectively, within selling, general and administrative expenses in our condensed consolidated statements of income (loss) for charges related to the resolution of the Xyrem Antitrust Litigation, including the class settlement.

Patent Infringement Litigation

Avadel Litigation

As previously disclosed in the notes to our consolidated financial statements for the year ended December 31, 2024 included in our Annual Report on Form 10-K for the year ended December 31, 2024, and the notes to our unaudited condensed consolidated financial statements for the quarters ended March 31, 2025 and June 30, 2025 included in our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025 and June 30, 2025, respectively, we are a party to certain legal proceedings against Avadel. From May 2021 to July 2022, we filed a number of patent infringement suits against Avadel, and several of its corporate affiliates in the United States District Court for the District of Delaware, alleging that Avadel’s Lumryz infringes a number of our patents. In response, Avadel filed a series of counterclaims, including counterclaims asserting that we engaged in unlawful monopolization in violation of the Sherman Act, and in April 2022, Avadel sued us in the District Court alleging that we misappropriated trade secrets and breached certain contracts between the parties. Additionally, from December 2024 through April 2025, Avadel filed a series of patent infringement suits against us in the United States District Court for the District of Delaware, alleging that Jazz’s sales of Xywav infringe on certain newly-issued Avadel patents.

On October 21, 2025, we entered into a global settlement agreement (the “Settlement Agreement”) with Avadel CNS Pharmaceuticals LLC and Flamel Ireland Limited, subsidiaries of Avadel Pharmaceuticals plc (collectively, “Avadel”) to settle all claims relating to all disputes between the parties, including the Company’s previously disclosed ongoing patent infringement litigation against Avadel in the U.S. District Court for the District of Delaware (the “Court”) and Avadel’s counterclaims alleging anticompetitive conduct by us and other alleged conduct related to Avadel trade secrets and contracts between the parties, as well as Avadel’s ongoing patent infringement litigation in the Court against us. Pursuant to the Settlement Agreement, we agreed to (a) grant a license to Avadel, effective immediately to any past, present, or future patents that could be asserted by us against Avadel’s Lumryz product for use in indications currently approved by the U.S. Food and Drug Administration (the “FDA” and such indications, the “Narcolepsy Indications”), and (b) grant a license to Avadel

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effective March 1, 2028 to any past, present, or future patents that could be asserted by us against Avadel’s Lumryz products for any other indications or uses not currently approved by the FDA (the “Non-Narcolepsy Indications”), including all present and future indications, strengths, conditions of use, dosages, doses, dosage forms, and presentations. Pursuant to the Settlement Agreement, Avadel has agreed to pay royalties to us of 3.85% (subject to a potential reduction to 3.75%) on net sales of its Lumryz product for Narcolepsy Indications commencing October 1, 2025, and beginning March 1, 2028, to pay royalties to us of 10% (subject to a potential reduction to 9.5%) on net sales of its Lumryz product for Non-Narcolepsy Indications. Avadel has also agreed not to market, offer for sale, take orders for, distribute, promote, or provide patient support services with respect to Avadel Licensed Products for Non-Narcolepsy Indications before March 1, 2028, and to pay royalties to us of 80% of such unpermitted net sales of its Lumryz product for Non-Narcolepsy Indications from October 1, 2025 through February 29, 2028. Pursuant to the Settlement Agreement, Avadel grants us a covenant not to sue for infringement of any past, present or future patents that could be asserted against the Xywav or Xyrem products, including all present and future indications, strengths, conditions of use, dosages, doses, dosage forms, and presentations. We have not agreed to waive or otherwise consent to the “breaking” of the Orphan Drug Exclusivity for Xywav in idiopathic hypersomnia as part of this settlement. Pursuant to the Settlement Agreement, we agreed to (a) pay a total of $90.0 million in a lump sum in settlement of Avadel’s pending claims against us and (b) waive our right to receive certain royalties the Court previously ordered Avadel to pay us on sales of Avadel’s Lumryz product through September 30, 2025.

The Settlement Agreement obligated the parties to promptly file stipulations of dismissal with the Court or otherwise abandon the pending legal proceedings, and as of October 27, 2025, the Court dismissed all relevant matters with prejudice. The Settlement Agreement, in which we deny all alleged wrongdoing, also includes releases by us, on the one hand, and Avadel, on the other hand, and each of their past, present and future affiliates, directors, officers, employees and other related parties, for all conduct concerning any of the matters alleged, or that could have been alleged, in the lawsuit.

As of September 30, 2025, we recorded an accrual of $90.0 million within accrued liabilities in our condensed consolidated balance sheets, for charges related to the resolution of the Avadel litigation. The related expense is included within selling, general and administrative expenses in our condensed consolidated statements of income (loss) for the three and nine months ended September 30, 2025.

Xywav Patent Litigation

In June 2021, we received notice from Lupin, that it has filed with FDA an ANDA, for a generic version of Xywav. The notice from Lupin included a paragraph IV certification with respect to ten of our patents listed in FDA’s Orange Book for Xywav on the date of our receipt of the notice. The asserted patents relate generally to the composition and method of use of Xywav, and methods of treatment when Xywav is administered concomitantly with certain other medications.

In July 2021, we filed a patent infringement suit against Lupin in the United States District Court for the District of New Jersey. The complaint alleges that by filing its ANDA, Lupin has infringed ten of our Orange Book listed patents. We are seeking a permanent injunction to prevent Lupin from introducing a generic version of Xywav that would infringe our patents. As a result of this lawsuit, we expect that a stay of approval of up to 30 months will be imposed by FDA on Lupin's ANDA. In June 2021, FDA recognized seven years of Orphan Drug Exclusivity for Xywav through July 21, 2027. On October 4, 2021, Lupin filed an answer to the complaint and counterclaims asserting that the patents are invalid or not enforceable, and that its product, if approved, will not infringe our patents.

In April 2022, we received notice from Lupin that it had filed a paragraph IV certification regarding a newly-issued patent listed in the Orange Book for Xywav. On May 11, 2022, we filed an additional lawsuit against Lupin in the United States District Court for the District of New Jersey alleging that by filing its ANDA, Lupin infringed the newly-issued patent related to a method of treatment when Xywav is administered concomitantly with certain other medications. The suit seeks a permanent injunction to prevent Lupin from introducing a generic version of Xywav that would infringe our patent. On June 22, 2022, the Court consolidated the two lawsuits we filed against Lupin.

In November 2022, we received notice from Lupin that it had filed a paragraph IV certification regarding a newly-issued patent listed in the Orange Book for Xywav. On January 19, 2023, we filed an additional lawsuit against Lupin in the United States District Court for the District of New Jersey alleging that by filing its ANDA, Lupin infringed the newly-issued patent referenced in its November 2022 paragraph IV certification, as well as another patent that issued in January 2023. The suit seeks a permanent injunction to prevent Lupin from introducing a generic version of Xywav that would infringe the two patents in suit. On February 15, 2023, the Court consolidated the new lawsuit with the two suits we previously filed against Lupin. No trial date has been set in the consolidated case against Lupin.

In February 2023, we received notice from Teva that it had filed with FDA an ANDA for a generic version of Xywav. The notice from Teva included a paragraph IV certification with respect to thirteen of our patents listed in FDA’s Orange Book for Xywav on the date of the receipt of the notice. The asserted patents relate generally to the composition and method of use of Xywav, and methods of treatment when Xywav is administered concomitantly with certain other medications.

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In March 2023, we filed a patent infringement suit against Teva in the United States District Court for the District of New Jersey. The complaint alleges that by filing its ANDA, Teva has infringed thirteen of our Orange Book listed patents. We are seeking a permanent injunction to prevent Teva from introducing a generic version of Xywav that would infringe our patents. As a result of this lawsuit, we expect that a stay of approval of up to 30 months will be imposed by FDA on Teva’s ANDA. On May 23, 2023, Teva filed an answer to the complaint and counterclaims asserting that the patents are invalid or not enforceable, and that its product, if approved, will not infringe our patents.

On December 15, 2023, based on a stipulation between all parties, the Court consolidated the Lupin lawsuits and the Teva lawsuit for all purposes. No trial date has been set in the consolidated case.

In July 2024, we received notices from Lupin and Teva that they had each filed a paragraph IV certification regarding a newly-issued patent listed in the Orange Book for Xywav. On August 27, 2024, we filed an additional lawsuit in the United States District Court for the District of New Jersey against each of Lupin and Teva, alleging that, by filing its ANDA, each party infringed the newly-issued patent related to a method of treatment using Xywav. The suits seek orders that the effective date of FDA approval of each defendant’s application shall be a date no earlier than the expiration of the newly-issued patent.

In July 2025, we received notice from Granules India Limited that it has filed with FDA an ANDA for a generic version of Xywav. The notice from Granules included a paragraph IV certification with respect to fourteen of our patents listed in FDA’s Orange Book for Xywav on the date of the receipt of the notice. The asserted patents relate generally to the composition and method of use of Xywav, and methods of treatment when Xywav is administered concomitantly with certain other medications.

In August 2025, we filed a patent infringement suit against Granules in the United States District Court for the District of New Jersey. The complaint alleges that by filing its ANDA, Granules has infringed fourteen of our Orange Book-listed patents. We are seeking a permanent injunction to prevent Granules from introducing a generic version of Xywav that would infringe our patents. As a result of this lawsuit, we expect that a stay of approval of up to 30 months will be imposed by FDA on Granules’ ANDA.

Zepzelca Patent Litigation

In July and August 2024, we received notices from the Zepzelca ANDA Filers that they have each filed with FDA an ANDA for a generic version of Zepzelca (lurbinectedin). As of the date of this filing, we are not aware of other ANDA filers. The notices from the Zepzelca ANDA Filers each included a paragraph IV certification with respect to a patent listed in the Orange Book for Zepzelca on the date of the receipt of the notice. The listed patent relates to the drug substance, drug product and approved use of Zepzelca. Jazz is the exclusive licensee to this Zepzelca patent pursuant to an agreement with PharmaMar. A paragraph IV certification is a certification by a generic applicant that alleges that the patent covering the branded product is invalid, unenforceable, and/or will not be infringed by the manufacture, use or sale of the generic product.

On September 11, 2024, we and PharmaMar filed a patent infringement suit against the Zepzelca ANDA Filers in the United States District Court for the District of New Jersey. The complaint alleges that by filing their ANDAs, the Zepzelca ANDA Filers have infringed the Orange Book listed patent for Zepzelca, and seeks an order that the effective date of FDA approval of the ANDAs shall be a date no earlier than the expiration of the asserted patent.

In December 2024, we received the Zepzelca ANDA Filers’ answers to the complaint. The answers include defenses and counterclaims asserting that the Zepzelca ANDA Filers’ products, if launched, would not infringe our patents and that our patents are invalid. No trial date has been set in this matter.

On March 26, 2025, we and Sandoz stipulated to the dismissal of our lawsuit against Sandoz without prejudice.

On September 12, 2024, we and PharmaMar filed a patent infringement suit against RK Pharma, in the United States District Court for the District of Delaware. The complaint alleges that by filing its ANDA, RK Pharma has infringed the Orange Book listed patent for Zepzelca, and seeks an order that the effective date of FDA approval of RK Pharma’s ANDA shall be no earlier than the expiration of the asserted patent. On November 13, 2024, we voluntarily dismissed this action against RK Pharma in the United States District Court for the District of Delaware. RK Pharma remains a defendant in the litigation referenced above in the United States District Court for the District of New Jersey.

In July 2025, we received notice from InvaGen Pharmaceuticals, Inc. that it had filed a paragraph IV certification regarding a newly-issued patent listed in the Orange Book for Zepzelca. On September 4, 2025, we filed an additional lawsuit in the United States District Court for the District of New Jersey against each of the Zepzelca ANDA Filers, alleging that, by filing its ANDA, each party infringed the newly-issued patent related to a method of treatment using Zepzelca. The suit seeks orders that the effective date of FDA approval for each defendant’s application shall be no earlier than the expiration of the newly-issued patent.

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Defitelio Patent Litigation

In March 2025, we received a notice from Almaject that it had filed with FDA an ANDA for a generic version of Defitelio (defibrotide sodium). The notice from Almaject included a paragraph IV certification respect to certain of our patents listed in FDA’s Orange Book for Defitelio on the date of the notice. The listed patents relate generally to the Defitelio drug product and its approved use. On April 16, 2025, we filed a patent infringement lawsuit against Almaject in the United States District Court for the District of New Jersey. The complaint alleges that by filing its ANDA, Almaject has infringed certain of our Orange Book listed patents, and seeks an order that the effective date of FDA approval for the Almaject ANDA shall be on a date no earlier than the expiration of the last to expire of the asserted patents. As a result of this lawsuit, we expect that a stay of approval of up to 30 months will be imposed by FDA on Almaject’s ANDA.

FDA Litigation

On June 22, 2023, we filed a complaint in the United States District Court for the District of Columbia seeking a declaration that FDA’s approval on May 1, 2023, of the NDA for Avadel's Lumryz was unlawful. In the complaint, we alleged that FDA acted outside its authority under the Orphan Drug Act, when, despite ODE protecting Jazz’s low-sodium oxybate product Xywav, FDA approved the Lumryz NDA and granted Lumryz ODE based on FDA’s finding that Lumryz makes a major contribution to patient care and is therefore clinically superior to Xywav and Xyrem. Jazz further alleged that, in doing so, FDA failed to follow its own regulations, failed to follow established agency policy without providing a reasoned explanation for the departure, reversed prior decisions by its own staff and experts without a reasoned explanation, and disregarded the relevant scientific literature and data. The complaint, filed pursuant to the Administrative Procedure Act, asked the Court to vacate and set aside FDA’s approval of the Lumryz NDA and sought a declaration that FDA’s approval of the Lumryz NDA was arbitrary, capricious, an abuse of discretion and otherwise not in accordance with law and that approval of the Lumryz NDA was in excess of FDA’s statutory authority and was made without observance of procedure required by law.

On September 15, 2023, we filed a motion for summary judgment. On October 20, 2023, Avadel and FDA filed cross motions for summary judgment. Oral argument on these motions was held on May 10, 2024 and on October 30, 2024, the District Court issued an order denying Jazz’s motion for summary judgment and granting Avadel’s and FDA’s cross-motions for summary judgment. Jazz appealed the matter to the United States Court of Appeals for the District of Columbia Circuit. We filed our opening appeal brief on January 31, 2025 and the D.C. Circuit held oral argument on the appeal on May 5, 2025. On June 27, 2025, the D.C. Circuit affirmed District Court’s ruling.

Qui tam matter

In July 2022, we received a subpoena from the USAO for the District of Massachusetts requesting documents related to Xyrem and U.S. Patent No. 8,772,306 (“Method of Administration of Gamma Hydroxybutyrate with Monocarboxylate Transporters”), product labeling changes for Xyrem, communications with FDA and the USPTO, pricing of Xyrem, and other related documents. On July 18, 2024, the United States District Court for the District of Massachusetts unsealed a qui tam whistleblower lawsuit underlying the USAO’s subpoena, captioned 1:21-cv-10891-PBS and originally filed under seal on May 27, 2021. The public docket in this matter indicates that on May 24 and June 7, 2024, respectively, the United States and a number of states named in the whistleblower complaint declined to intervene in this matter. As such, private whistleblower litigation will proceed in the United States District Court for the District of Massachusetts. The Court set a deadline of September 1, 2024, for the plaintiff to file an amended complaint, and December 2, 2024, for us to file a motion to dismiss the amended complaint. The plaintiff filed the amended complaint on September 1, 2024. We filed our motion to dismiss on December 2, 2024. The Court held oral argument on the motion to dismiss on April 2, 2025. On September 23, 2025, the Court granted our motion and dismissed the plaintiff’s federal claims with prejudice and state-law claims without prejudice.

Chimerix Acquisition Litigation

On March 21, 2025, Chimerix filed a Recommendation Statement with the SEC in relation to the proposed acquisition of Chimerix by Jazz. Also on March 21, 2025, Jazz disseminated a Tender Offer Statement to Chimerix shareholders in relation to the proposed transaction.

Following filing of the filing and dissemination of the Tender Offer Documents, Jazz Pharmaceuticals plc, its wholly-owned subsidiary Pinetree Acquisition Sub, Inc., Chimerix Inc., the Chimerix Board of Directors, Centerview Partners LLC, were named as defendants in the Rosenthal Lawsuit in the Supreme Court of the State of New York, County of Chemung. In addition to the Rosenthal Lawsuit, the Chimerix Shareholder Litigation was filed in the Supreme Court of the State of New York, County of New York. Collectively, in the Chimerix Transaction Litigation, the plaintiffs alleged that the Tender Offer Documents omitted material information and contained misrepresentations, in violation of various New York and North Carolina laws. The plaintiffs in the Chimerix Transaction Litigation sought various remedies, including injunctive relief to prevent the consummation of the Chimerix Acquisition unless certain allegedly material information was disclosed, or in the alternative, rescission or damages.

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On April 7, 2025, Chimerix filed an amended Recommendation Statement and Jazz filed an amended Tender Offer Document, each containing supplemental disclosures related to the Chimerix Acquisition. Pursuant to a memorandum of understanding between the parties, the Rosenthal Lawsuit was dismissed on April 7, 2025. The remaining lawsuits in the Chimerix Transaction Litigation were dismissed on June 26, 2025.

From time to time, we are involved in legal proceedings arising in the ordinary course of business. We believe there is no other litigation pending that could have, individually or in the aggregate, a material adverse effect on our results of operations or financial condition.

11. Shareholders’ Equity

Share Repurchase Program

In July 2024, our board of directors authorized the New Repurchase Program to repurchase ordinary shares having an aggregate purchase price of $500.0 million, exclusive of any brokerage commissions. Under the New Repurchase Program, which has no expiration date, we may repurchase ordinary shares from time to time by any methods and/or structures permitted by applicable law. The timing and amount of repurchases will depend on a variety of factors, including the price of our ordinary shares, alternative investment opportunities, restrictions under the Amended Credit Agreement and the indenture for our Secured Notes, corporate and regulatory requirements and market conditions. The New Repurchase Program may be modified, suspended or discontinued at any time without our prior notice. The New Repurchase Program replaces and supersedes the Old Repurchase Program, a share repurchase program to repurchase ordinary shares having an aggregate purchase price of $1.5 billion, exclusive of any brokerage commissions. During the three months ended September 30, 2025, no shares were repurchased. During the nine months ended September 30, 2025, we spent a total of $125.0 million to repurchase 1.1 million of our ordinary shares, all under the New Repurchase Program, at a purchase price, including commissions, of $109.52 per share.

During the three months ended September 30, 2024, we spent a total of $150.0 million to repurchase 1.4 million of our ordinary shares, all under the New Repurchase Program, at a purchase price, including commissions, of $109.32 per share. The repurchases during the three months ended September 30, 2024, were effected in privately negotiated transactions with or through one of the initial purchasers of the 2030 Notes concurrently with the pricing of the offering of the 2030 Notes. During the nine months ended September 30, 2024, we spent a total of $150.0 million to repurchase 1.4 million of our ordinary shares, all under the New Repurchase Program, at a purchase price, including commissions, of $109.32 per share and $161.4 million to repurchase 1.5 million of our ordinary shares, all under the Old Repurchase Program, at a purchase price, including commissions, of $110.75 per share.

As of September 30, 2025, the remaining amount authorized for repurchases under the New Repurchase Program was $225.0 million, exclusive of any brokerage commissions.

Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss as of September 30, 2025 and December 31, 2024 were as follows (in thousands): 

			Net Unrealized Gain (Loss) From Hedging Activities						Foreign Currency Translation Adjustments						Total Accumulated Other Comprehensive Loss
Balance at December 31, 2024			$	740					$	(948,407)					$	(947,667)
Other comprehensive income before reclassifications			128						378,854						378,982
Amounts reclassified from accumulated other comprehensive loss			(1,213)						—						(1,213)
Other comprehensive income (loss), net			(1,085)						378,854						377,769
Balance at September 30, 2025			$	(345)					$	(569,553)					$	(569,898)

During the nine months ended September 30, 2025, other comprehensive income (loss) primarily reflects foreign currency translation adjustments, primarily due to the strengthening of sterling against the U.S. dollar.

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12. Net Income (Loss) per Ordinary Share

Basic net income (loss) per ordinary share is based on the weighted-average number of ordinary shares outstanding. Diluted net income (loss) per ordinary share is based on the weighted-average number of ordinary shares outstanding and potentially dilutive ordinary shares outstanding.

Basic and diluted net income (loss) per ordinary share were computed as follows (in thousands, except per share amounts):

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Numerator:
Net income (loss)			$	251,412					$	215,055					$	(559,599)					$	369,005
Effect of interest on assumed conversions of the 2026 Notes, net of tax			—						1,028						—						10,761
Net income (loss) for dilutive net income (loss) per ordinary share			$	251,412					$	216,083					$	(559,599)					$	379,766
Denominator:
Weighted-average ordinary shares used in per share calculations - basic			60,696						61,414						60,955						62,275
Dilutive effect of employee equity incentive and purchase plans			910						435						—						515
Dilutive effect of the 2026 Notes			—						1,325						—						4,721
Weighted-average ordinary shares used in per share calculations - diluted			61,606						63,174						60,955						67,511
Net income (loss) per ordinary share:
Basic			$	4.14					$	3.50					$	(9.18)					$	5.93
Diluted			$	4.08					$	3.42					$	(9.18)					$	5.63

Potentially dilutive ordinary shares from our employee equity incentive and purchase plans are determined by applying the treasury stock method to the assumed vesting of outstanding RSUs and PRSUs, the assumed exercise of share options and the assumed issuance of ordinary shares under our ESPP.

In July 2024, we irrevocably elected to fix the settlement method for exchanges of the 2026 Notes to a combination of cash and ordinary shares of Jazz Pharmaceuticals plc with a specified cash amount per $1,000 principal amount of 2026 Notes exchanged equal to or in excess of $1,000. As a result of the election, an exchanging holder will receive (i) up to $1,000 in cash per $1,000 principal amount of 2026 Notes exchanged and (ii) cash, ordinary shares, or any combination thereof, at our election, in respect of the remainder, if any, of its exchange obligation in excess of $1,000 per $1,000 principal amount of 2026 Notes exchanged. The potential issue of ordinary shares upon exchange of the 2026 Notes was anti-dilutive and had no impact on diluted net income (loss) per ordinary share for the three and nine months ended September 30, 2025.

For the 2030 Notes, we are required to settle the principal amount in cash and have the option to settle the conversion feature for the amount above the conversion price, or the conversion spread, in cash, ordinary shares or a combination of cash and ordinary shares. The conversion spread will have a dilutive impact on diluted net income per ordinary share when the average market price of our ordinary shares for a given period exceeds the conversion price, of approximately $153.05 per ordinary share, of the 2030 Notes. The average market price of our ordinary shares for the three and nine months ended September 30, 2025 did not exceed the conversion price of the 2030 Notes.

The following table represents the weighted-average ordinary shares that were excluded from the calculation of diluted net income (loss) per ordinary share for the periods presented because including them would have an anti-dilutive effect (in thousands):

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Employee equity incentive and purchase plans			3,376						4,465						4,992						4,701

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13. Revenues

The following table presents a summary of total revenues (in thousands): 

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Xywav			$	431,410					$	388,466					$	1,191,535					$	1,072,238
Xyrem			35,663						58,114						108,253						184,526
Epidiolex/Epidyolex			302,608						251,558						772,075						697,376
Sativex			4,752						4,586						14,774						13,704
Total Neuroscience			774,433						702,724						2,086,637						1,967,844
Rylaze/Enrylaze			99,868						98,780						294,760						309,359
Zepzelca			79,295						85,843						216,869						241,990
Defitelio/defibrotide			51,752						65,818						140,520						158,915
Vyxeos			37,583						34,313						111,978						109,348
Ziihera			8,306						—						16,272						—
Modeyso			11,032						—						11,502						—
Total Oncology			287,836						284,754						791,901						819,612
Other			2,143						2,229						10,863						8,497
Product sales, net			1,064,412						989,707						2,889,401						2,795,953
High-sodium oxybate AG royalty revenue			52,945						58,157						156,029						162,268
Other royalty and contract revenues			8,750						7,105						24,230						22,556
Total revenues			$	1,126,107					$	1,054,969					$	3,069,660					$	2,980,777

The following table presents a summary of total revenues attributed to geographic sources (in thousands): 

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
United States			$	1,020,476					$	953,669					$	2,755,273					$	2,686,486
Europe			86,405						77,318						252,206						230,821
All other			19,226						23,982						62,181						63,470
Total revenues			$	1,126,107					$	1,054,969					$	3,069,660					$	2,980,777

The following table presents a summary of the percentage of total revenues from customers that represented more than 10% of our total revenues: 

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
ESSDS			41		%				42		%				42		%				42		%
ASD			11		%				10		%				11		%				9		%
McKesson			11		%				13		%				11		%				12		%

Financing and payment

Our payment terms vary by the type and location of our customer but payment is generally required in a term ranging from 30 to 65 days.

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14. Share-Based Compensation

Share-based compensation expense related to RSUs, PRSUs, share options and grants under our ESPP was as follows (in thousands): 

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Selling, general and administrative			$	61,295					$	37,101					$	143,968					$	112,451
Research and development			21,767						18,927						63,348						55,030
Cost of product sales			5,063						3,732						12,963						10,374
Total share-based compensation expense, pre-tax			88,125						59,760						220,279						177,855
Income tax benefit from share-based compensation expense			(16,619)						(12,190)						(38,412)						(25,218)
Total share-based compensation expense, net of tax			$	71,506					$	47,570					$	181,867					$	152,637

15. Income Taxes

Our income tax benefit was $242.4 million and $277.4 million for the three and nine months ended September 30, 2025, respectively, and arose primarily due to the reversal of a valuation allowance against certain U.S. federal and state deferred tax assets acquired through the Chimerix Acquisition. This compared to an income tax benefit of $14.5 million and $33.5 million for the same periods in 2024. Apart from the reversal of the valuation allowance, the income tax benefits related to tax arising on income or losses in Ireland, the U.K., the U.S. and certain other foreign jurisdictions and Pillar Two top-up taxes, offset by deductions on subsidiary equity, patent box and foreign derived intangible income benefits and tax credits.

Our net deferred tax asset comprises U.S. federal and state tax credits, U.S. federal and state and foreign net operating loss carryforwards and other temporary differences and is net of deferred tax liabilities primarily related to acquired intangible assets. We maintain a valuation allowance against certain deferred tax assets. Each reporting period, we evaluate the need for a valuation allowance on our deferred tax assets by jurisdiction and adjust our estimates as more information becomes available. The FDA approval of Modeyso and its commercial launch, in August 2025, has provided sufficient positive evidence to support a change in judgment regarding the realizability of the deferred tax assets acquired through the Chimerix Acquisition. The Company concluded it is more-likely-than-not that the assets will be realized through related future income. Accordingly, the valuation allowance recorded at the acquisition date was released during the third quarter, and the Company recognized a deferred tax asset of $205.9 million on the balance sheet, with a corresponding credit to income tax benefit in the income statement for the three and nine months ended September 30, 2025.

We are required to recognize the financial statement effects of a tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. As a result, we have recorded an unrecognized tax benefit for certain tax benefits which we judge may not be sustained upon examination. We file income tax returns in multiple tax jurisdictions, the most significant of which are Ireland, the U.K. and the U.S. (both at the federal level and in various state jurisdictions). For Ireland, we are no longer subject to income tax examinations by taxing authorities for the years prior to 2020. For the U.K., we are no longer subject to income tax examinations by taxing authorities for the years prior to 2016. The U.S. jurisdictions generally have statute of limitations three to four years from the later of the return due date or the date when the return was filed. However, in the U.S. (at the federal level and in most states), carryforwards that were generated in 2020 and earlier may still be adjusted upon examination by the taxing authorities. Certain of our subsidiaries are under examination by the Italian tax authorities for the years ended December 31, 2019, 2023, 2024 and 2025.

The Government of Ireland, the jurisdiction in which Jazz Pharmaceuticals Plc is incorporated, transposed the Global Minimum Tax Pillar Two rules into domestic legislation as part of the Finance Act. The Finance Act closely follows the EU Minimum Tax Directive and certain OECD Guidance released to date. The Company is within the scope of these rules, which took effect from January 1, 2024. Under the legislation, we are liable to pay a top-up tax for the difference between the Pillar Two effective tax rate per jurisdiction and the 15% minimum rate. The rules on how to calculate the Pillar Two effective tax rate are detailed and highly complex and specific adjustments envisaged in the Pillar Two legislation can give rise to different effective tax rates compared to those calculated for accounting purposes. We account for Pillar Two top-up taxes as a current tax when they are incurred. The income tax benefit for the nine months ended September 30, 2025 includes an amount for forecasted Pillar Two top-up taxes, as required under the applicable rules. The proportion of our profit before tax which is subject to the top-up tax and our exposure to Pillar Two top-up taxes in future years will depend on factors such as future revenues, costs and foreign currency exchange rates. We will continue to monitor changes in law and guidance in relation to Pillar Two.

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16. Subsequent Events

Sativex Disposition

On October 31, 2025, we completed the sale of Sativex to CNX Therapeutics, in a simultaneous sign-and-close transaction, for total cash consideration of $39.6 million, including payment for acquired inventory. Under the terms of the agreement, CNX Therapeutics will acquire the rights to Sativex in all of the existing territories available to us. The assets subject to sale were classified as held and used as of September 30, 2025, as the criteria for classification as held for sale was not met at the balance sheet date. This divestiture is not expected to have a material impact on our consolidated financial statements.

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Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion of our financial condition and results of operations should be read in conjunction with the condensed consolidated financial statements and the notes to condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10‑Q. This discussion contains forward-looking statements that involve risks and uncertainties. When reviewing the discussion below, you should keep in mind the substantial risks and uncertainties that could impact our business. In particular, we encourage you to review the risks and uncertainties described in “Risk Factors” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, as supplemented by the risks and uncertainties described in "Risk Factors" Item 1A. Risk Factors in Part II of this Quarterly Report on Form 10-Q. These risks and uncertainties could cause actual results to differ materially from those projected in forward-looking statements contained in this report or implied by past results and trends. Forward-looking statements are statements that attempt to forecast or anticipate future developments in our business, financial condition or results of operations. See the “Cautionary Note Regarding Forward-Looking Statements” that appears at the end of this discussion. These statements, like all statements in this report, speak only as of the date of this Quarterly Report on Form 10‑Q (unless another date is indicated), and we undertake no obligation to update or revise these statements in light of future developments.

Overview

Jazz Pharmaceuticals plc is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families. We are dedicated to developing life-changing medicines for people with serious diseases - often with limited or no therapeutic options. We have a diverse portfolio of marketed medicines, including leading therapies for sleep disorders and epilepsy, and a growing portfolio of cancer treatments. Our patient-focused and science-driven approach powers pioneering research and development advancements across our robust pipeline of innovative therapeutics in oncology and neuroscience.

Our strategy for growth is rooted in executing commercial launches and ongoing commercialization initiatives, advancing robust R&D programs and delivering impactful clinical results, effectively deploying capital to strengthen the prospects of achieving our short- and long-term goals through strategic corporate development, and delivering strong financial performance. We focus on patient populations with high unmet needs. We seek to identify and develop differentiated therapies for these patients that we expect will be long-lived assets and that we can support with an efficient commercialization model. In addition, we leverage our efficient, scalable operating model and integrated capabilities across our global infrastructure to effectively reach patients around the world.

Our strategy to deliver sustainable growth and enhanced value continues to be focused on:

•Strong commercial execution to drive diversified revenue growth and address unmet medical needs of our patients across our product portfolio, which focuses on neuroscience and oncology medicines;

•Expanding and advancing our pipeline to achieve a valuable portfolio of durable, highly differentiated products;

•Continuing to build a flexible, efficient and productive development engine for targeted therapeutic areas to identify and progress early-, mid- and late-stage assets;

•Identifying and acquiring novel product candidates and approved therapies to complement our existing pipeline and commercial portfolio;

•Investing in an efficient, scalable operating model and differentiated capabilities to enable growth; and

•Unlocking further value through indication expansion and entry into global markets.

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In 2025, consistent with our strategy, we are continuing to focus on research and development activities within our neuroscience and oncology therapeutic areas.

Our lead marketed products, listed below, are approved in countries around the world to improve patient care.

Product			Indications			Initial Approval Date			Markets
NEUROSCIENCE
Xywav® (calcium, magnesium, potassium, and sodium oxybates)			Treatment of cataplexy or EDS in patients seven years of age and older with narcolepsy.			July 2020			U.S.
			Treatment of IH in adults.			August 2021			U.S.
			Treatment of cataplexy in patients with narcolepsy.			May 2023			Canada
Epidiolex® (cannabidiol)			Treatment of seizures associated with LGS, DS, or TSC in patients 1 year of age and older.			June 2018			U.S., Israel
Epidyolex® (cannabidiol)			For adjunctive therapy of seizures associated with LGS or DS, in conjunction with clobazam, for patients 2 years of age and older.1			September 2019			EU, Great Britain, EEA, Switzerland, Australia, other markets
			For adjunctive therapy of seizures associated with TSC for patients 2 years of age and older.			April 2021			EU, Great Britain, EEA and Switzerland
Epidiolex® (cannabidiol)			For adjunctive therapy of seizures associated with LGS, DS or TSC for patients 2 years of age and older.			November 2023			Canada
ONCOLOGY
Rylaze® (asparaginase erwinia chrysanthemi (recombinant)- rywn)			A component of a multi-agent chemotherapeutic regimen for the treatment of ALL, and LBL, in adult and pediatric patients 1 month or older who have developed hypersensitivity to E. coli-derived asparaginase.			June 2021			U.S.
Rylaze® (crisantaspase recombinant)			A component of a multi-agent chemotherapeutic regimen for the treatment of ALL and LBL, in adults and pediatric patients 1 year or older who have developed hypersensitivity to E. coli-derived asparaginase.			September 2022			Canada
Enrylaze® (recombinant crisantaspase)			A component of a multi-agent chemotherapeutic regimen for the treatment of ALL and LBL in adult and pediatric patients (1 month and older) who have developed hypersensitivity or silent inactivation to E. coli-derived asparaginase.			September 2023			EU, Great Britain, Switzerland, other markets
Zepzelca® (lurbinectedin)			Treatment of adult patients with metastatic SCLC, with disease progression on or after platinum-based chemotherapy.			June 2020			U.S. (licensed from PharmaMar)2
			Treatment of adults with Stage III or metastatic SCLC who have progressed on or after platinum-containing therapy.			September 2021			Canada (licensed from PharmaMar)3
			In combination with atezolizumab or atezolizumab and hyaluronidase-tqjs for the maintenance treatment of adult patients with extensive-stage SCLC whose disease has not progressed after first-line induction therapy with atezolizumab or atezolizumab and hyaluronidase-tqjs, carboplatin and etoposide.			October 2025			U.S. (licensed from PharmaMar)

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Product			Indications			Initial Approval Date			Markets
Ziihera® (zanidatamab-hrii)			Treatment of adults with previously treated, unresectable or metastatic HER2-positive (IHC 3+) BTC, as detected by an FDA-approved test.			November 2024			U.S. (licensed from Zymeworks)2
			Treatment of adults with unresectable locally advanced or metastatic HER2-positive (IHC3+) BTC previously treated with at least one prior line of systemic therapy.			June 2025			EU (licensed from Zymeworks)4
Modeyso™ (dordaviprone)			Treatment of adult and pediatric patients 1 year of age and older with diffuse midline glioma harboring an H3 K27M mutation with progressive disease following prior therapy.			August 2025			U.S.2

1 The clobazam restriction limited to EU and Great Britain

2 Accelerated approval received from FDA

3 Conditional approval received from Health Canada

4 Conditional marketing authorization granted by EC

Neuroscience

We are the global leader in the development and commercialization of oxybate therapy for patients with sleep disorders. Xyrem was approved by FDA in 2002, and is indicated for the treatment of cataplexy or EDS in patients seven years of age and older with narcolepsy. In 2020, we received FDA approval for Xywav for the treatment of cataplexy or EDS in patients seven years of age and older with narcolepsy. In August 2021, Xywav became the first and only therapy approved by FDA for the treatment of IH in adults. Xywav is an oxybate therapy that contains 92% less sodium than Xyrem. Xywav has become a standard of care for patients with narcolepsy and IH.

Since there is no cure for narcolepsy and long-term disease management is needed, we believe that Xywav represents an important therapeutic option for patients with this sleep disorder. Our commercial efforts are focused on educating patients and physicians on the strength of clinical evidence that supports the use of Xywav for treating narcolepsy and IH. Xywav has demonstrated efficacy for the treatment of cataplexy and EDS in narcolepsy and multiple daytime symptoms such as sleep inertia in IH. In addition, we are also focused on educating patients and physicians on the long-term health impacts of high sodium intake, and how the use of Xywav helps address a modifiable risk factor for cardiovascular morbidity. We view the continued adoption of Xywav in narcolepsy as a positive indication that physicians and patients appreciate the benefits of a low-sodium oxybate option.

In June 2021, FDA recognized seven years of ODE for Xywav in narcolepsy. ODE extends through January 2028. Nevertheless, Lumryz, a fixed-dose, high-sodium oxybate, was approved by FDA on May 1, 2023, for the treatment of cataplexy or EDS in adults with narcolepsy and was launched in the U.S. market by Avadel. FDA continues to recognize seven years of ODE for Xywav in narcolepsy. In connection with granting ODE, FDA stated that "Xywav is clinically superior to Xyrem by means of greater safety because Xywav provides a greatly reduced chronic sodium burden compared to Xyrem.” FDA's summary also stated that "the differences in the sodium content of the two products at the recommended doses will be clinically meaningful in reducing cardiovascular morbidity in a substantial proportion of patients for whom the drug is indicated." FDA has also recognized that the difference in sodium content between Xywav and Lumryz is likely to be clinically meaningful in all patients with narcolepsy and that Xywav is safer than Lumryz in all such patients. Lumryz has the same sodium content as Xyrem. Xywav is the only approved oxybate therapy that does not carry a warning and precaution related to high sodium intake.

On August 12, 2021, FDA approved Xywav for the treatment of IH in adults. Xywav remains the first and only FDA-approved therapy to treat IH. We initiated the U.S. commercial launch of Xywav for the treatment of IH in adults in November 2021. In January 2022, the company announced FDA recognized seven years of ODE for Xywav in IH that extends through August 2028. IH is a debilitating neurologic sleep disorder characterized by chronic EDS (the inability to stay awake and alert during the day resulting in the irrepressible need to sleep or unplanned lapses into sleep or drowsiness), severe sleep inertia, and prolonged and non-restorative nighttime sleep. An estimated 37,000 people in the U.S. have been diagnosed with IH and are actively seeking healthcare.

We have agreements in place for Xywav with all three major PBMs in the U.S. To date, we have entered into agreements with various entities and have achieved benefit coverage for Xywav in both narcolepsy and IH indications for approximately 90% of commercial lives.

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We have seen strong adoption of Xywav in narcolepsy since its launch in November 2020, and increasing adoption in IH since its launch in November 2021. Exiting the third quarter of 2025, there were approximately 15,675 patients taking Xywav, including approximately 10,725 patients with narcolepsy and approximately 4,950 patients with IH.

We acquired Epidiolex (Epidyolex in certain markets outside the U.S.) in May 2021 as part of the GW Acquisition, which expanded our growing neuroscience business with a global, high-growth childhood-onset epilepsy franchise. Epidiolex was approved in the U.S. in June 2018 for the treatment of seizures associated with two rare and severe forms of epilepsy, LGS and DS, in patients two years of age and older, and subsequently approved in July 2020 for the treatment of seizures associated with TSC in patients one year of age and older. FDA also approved the expansion of all existing indications, LGS and DS, to patients one year of age and older. The rolling European launch of Epidyolex remains ongoing following EC approval in September 2019 for use as adjunctive therapy of seizures associated with LGS or DS, in conjunction with clobazam, for patients two years of age and older. The clobazam restriction is limited to the EU and Great Britain. Epidyolex is launched in all five key European markets: United Kingdom, Germany, Italy, Spain and France. Epidyolex was also approved for adjunctive therapy of seizures associated with TSC for patients 2 years of age and older in the EU in April 2021 and Great Britain in August 2021, and is approved or under review for this indication in other markets. Outside the U.S. and Europe, Epidiolex/Epidyolex is approved in Israel, Canada, Australia, New Zealand and Taiwan.

In October 2025, we divested Sativex to CNX Therapeutics, who will assume responsibility for Sativex in all countries it is approved. Jazz's existing partnerships will transition to CNX Therapeutics and it will take responsibility for commercialization in those markets previously owned by Jazz. We will continue to manufacture Sativex during the transition period given the complexity of the product and all external growing partnerships will transition to CNX Therapeutics.

Oncology

Rylaze was approved by FDA in June 2021 under the Real-Time Oncology Review program, and was launched in the U.S. in July 2021 for use as a component of a multi-agent chemotherapeutic regimen for the treatment of patients with ALL or LBL in pediatric and adult patients one month and older who have developed hypersensitivity to E. coli-derived asparaginase. Rylaze is the only recombinant erwinia asparaginase manufactured product approved in the U.S. that maintains a clinically meaningful level of asparaginase activity throughout the entire course of treatment. We developed Rylaze to address the needs of patients and health care providers for an innovative, high-quality erwinia asparaginase with reliable supply. The initial approved recommended dosage of Rylaze was for an IM administration of 25 mg/m2 every 48 hours. In November 2022, FDA approved an sBLA for a Monday/Wednesday/Friday 25/25/50 mg/m2 IM dosing schedule. In September 2023, the EC granted marketing authorization for JZP458 under the trade name Enrylaze®. This product has also been approved in Great Britain, Canada, Switzerland and Australia.

We acquired U.S. development and commercialization rights to Zepzelca in early 2020, and launched six months thereafter, with an indication for treatment of patients with SCLC with disease progression on or after platinum-based chemotherapy. Our education and promotional efforts are focused on SCLC-treating physicians. We are continuing to raise awareness of Zepzelca across academic and community cancer centers. In collaboration with Roche, we have an ongoing Phase 3 pivotal clinical trial of Zepzelca for use as maintenance therapy in first-line extensive-stage SCLC in combination with atezolizumab following induction therapy with carboplatin, etoposide and atezolizumab. In October 2024, we announced positive top-line results from the trial showing a statistically significant and clinically meaningful progression-free survival and overall survival benefit for Zepzelca and atezolizumab in combination in the first-line maintenance setting. In June 2025, the supplemental NDA submission for the combination of Zepzelca with atezolizumab or atezolizumab and hyaluronidase-tqjs was granted Priority Review by the FDA and subsequently approved in October 2025 as a maintenance treatment for adults with extensive-stage SCLC whose disease has not progressed after first-line induction therapy with atezolizumab, or atezolizumab and hyaluronidase-tqjs carboplatin and etoposide.

We acquired exclusive development and commercialization rights to Ziihera in 2022 through an exclusive licensing agreement with a subsidiary of Zymeworks providing development and commercialization rights to zanidatamab across all indications in the U.S., Europe, Japan and all other territories except for those Asia/Pacific territories previously licensed by Zymeworks. The term of the license agreement extends on a licensed product-by-licensed product and country-by-country basis until the expiration of the royalty term for such licensed product in such country. We have the right to terminate the amended license agreement at will upon a specified notice period, and either party can terminate the amended license agreement for the other party’s uncured material breach or bankruptcy.

Ziihera is a bispecific HER2-directed antibody that binds to two extracellular sites on HER2. Binding of zanidatamab-hrii with HER2 results in internalization leading to a reduction of the receptor on the tumor cell surface. In the U.S., Ziihera was granted accelerated approval by FDA in November 2024 and is indicated for the treatment of adults with previously treated, unresectable or metastatic HER2-positive (IHC 3+) BTC, as detected by an FDA-approved test. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the Phase 3 HERIZON-BTC-302 confirmatory trial. In June 2025, the EC granted conditional marketing authorization for Ziihera for the treatment of adults with

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unresectable locally advanced or metastatic HER2-positive (IHC3+) BTC previously treated with at least one prior line of systemic therapy.

We completed the acquisition of Chimerix in April 2025, adding Modeyso (dordaviprone), a protease activator of the mitochondrial caseinolytic protease P (ClpP) that also inhibits dopamine D2 receptor (DRD2), to our oncology portfolio. In August 2025, Modeyso was granted accelerated approval by the FDA for the treatment of adult and pediatric patients 1 year of age and older with diffuse midline glioma harboring an H3 K27M mutation with progressive disease following prior therapy. Modeyso is the first and only treatment option approved by the FDA for this ultra-rare and aggressive brain tumor that mainly affects children and young adults. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the Phase 3 ACTION confirmatory trial.

Defitelio is the first and only approved treatment for patients with VOD, sVOD, or VOD with renal or pulmonary dysfunction following HSCT by regulatory authorities in the U.S., Europe, Japan and other markets. Utilization of Defitelio is in part driven by evolving treatment practices in HSCT, and we are continuing to educate healthcare professionals on the clinical profile of Defitelio and its role in treating VOD and/or sVOD following HSCT.

Vyxeos is a treatment for adults with newly-diagnosed t-AML, or AML-MRC. In March 2021, FDA approved a revised label to include a new indication to treat newly-diagnosed t-AML, or AML-MRC, in pediatric patients aged one year and older. We continue to expand into new markets internationally as the product receives approvals and reimbursement in relevant markets. In the U.S., with ongoing trends towards lower-intensity treatments and away from intensive chemotherapy regimens for AML, we have seen increasing competition from other therapeutic options.

Research and Development Progress

Our research and development activities encompass all stages of development and currently include clinical testing of new product candidates and activities related to clinical improvements of, or additional indications or new clinical data for, our existing marketed products. We also have active preclinical programs for novel therapies, including neuroscience and precision medicines in oncology. We are increasingly leveraging our growing internal research and development function, and we have also entered into collaborations with third parties for the research and development of innovative early-stage product candidates and have supported additional investigator-sponsored trials that are anticipated to generate additional data related to our products. We also seek out investment opportunities in support of the development of early- and mid-stage technologies in our therapeutic areas and adjacencies. We have a number of licensing and collaboration agreements with third parties, including biotechnology companies, academic institutions and research-based companies and institutions, related to preclinical and clinical research and development activities in hematology and in precision oncology, as well as in neuroscience.

Within our oncology R&D program, in October 2022, we announced an exclusive licensing and collaboration agreement with Zymeworks providing us the right to acquire development and commercialization rights to Zymeworks' zanidatamab across all indications in the U.S., Europe, Japan and all other territories except for those Asia/Pacific territories previously licensed by Zymeworks. In December 2022, we exercised the option to continue with the exclusive development and commercialization rights to zanidatamab. Under the terms of the agreement, Zymeworks received an upfront payment of $50.0 million, and following the exercise of our option to continue the collaboration, a second, one-time payment of $325.0 million. Zymeworks is also eligible to receive regulatory and commercial milestone payments of up to $1.4 billion, for total potential payments of $1.76 billion. Zymeworks is eligible to receive tiered royalties between 10% and 20% on our net sales. Zanidatamab is a bispecific HER2-directed antibody that binds to two extracellular sites on HER2. Zanidatamab is currently being evaluated in multiple clinical trials as a treatment for patients with HER2-expressing cancers: a Phase 2 DiscovHER-Pan-206 trial evaluating zanidatamab monotherapy in previously-treated patients with various HER2-positive (IHC 3+) cancers, a Phase 2 EmpowHER-BC-208 trial to evaluate zanidatamab in patients with HER2-positive neoadjuvant and adjuvant breast cancer, a Phase 3 trial EmpowHER-BC-303 to evaluate zanidatamab plus chemotherapy or trastuzumab plus chemotherapy in patients with HER2-positive breast cancer whose disease has progressed on previous T-DXd treatment, and a Phase 3 confirmatory trial examining zanidatamab in first-line patients with HER2-positive BTC.

Following positive data from a pivotal Phase 2 clinical trial evaluating zanidatamab monotherapy in patients with previously treated advanced or metastatic HER2-amplified BTC, we completed a BLA submission in second-line BTC in March 2024. In May 2024, FDA granted Priority Review of the BLA; we received FDA approval for this BLA in November 2024. In April 2025, we announced that CHMP adopted a positive opinion recommending the conditional marketing authorization of zanidatamab in 2L BTC. In June 2025, the EC granted conditional marketing authorization for Ziihera for the treatment of adults with unresectable locally advanced or metastatic HER2-positive (IHC3+) BTC previously treated with at least one prior line of systemic therapy.

Our development plan for Zepzelca continues to progress. We are collaborating with Roche on a Phase 3 clinical trial evaluating Zepzelca in combination with atezolizumab for use as maintenance therapy in first-line extensive-stage SCLC. In October 2024, we announced positive top-line results from the trial showing a statistically significant and clinically meaningful

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progression-free survival and overall survival benefit for Zepzelca and atezolizumab in combination in the first-line maintenance setting. In April 2025, we announced the submission of an sNDA to support this combination in the first-line maintenance setting. In June 2025, the FDA granted Priority Review of the sNDA and we subsequently received FDA approval in October 2025 for the combination as a maintenance treatment of adult patients with extensive-stage SCLC whose disease has not progressed after first-line induction therapy with atezolizumab or atezolizumab and hyaluronidase-tqjs, carboplatin and etoposide. In December 2021, our licensor PharmaMar initiated a confirmatory trial in second-line SCLC. This ongoing three-arm trial is comparing Zepzelca as either monotherapy or in combination with irinotecan to investigator's choice of irinotecan or topotecan.

In addition, we have an ongoing Phase 4 observational study to collect real world safety and outcome data in adult Zepzelca monotherapy patients with SCLC who progress on or after prior platinum-containing chemotherapy. Preliminary findings from this study presented at the 2024 WCLC demonstrated Zepzelca provided clinical benefit when administered as second-line SCLC therapy. Updated results were presented at the 2025 WCLC that showed Zepzelca demonstrated clinically meaningful effectiveness across subgroups, including those with platinum-resistant disease and those with CNS metastases. The safety and tolerability profile observed in this Phase 4 study was consistent with prior findings, with no new safety signals reported.

In June 2022, we announced FDA had cleared our Investigational New Drug application for JZP815 and, in October 2022, we enrolled the first patient in a Phase 1 trial. JZP815 is an investigational stage pan-RAF kinase inhibitor that targets specific components of the mitogen-activated protein kinase pathway that, when activated by oncogenic mutations, can be a frequent driver of human cancer.

In April 2022, we announced that we had entered into a licensing and collaboration agreement with Werewolf to acquire exclusive global development and commercialization rights to Werewolf's investigational WTX-613, now referred to as JZP898. Under the terms of the agreement, we made an upfront payment of $15.0 million to Werewolf, and Werewolf is eligible to receive development, regulatory and commercial milestone payments of up to $1.26 billion. If approved, Werewolf is eligible to receive a tiered, mid-single-digit percentage royalty on net sales of JZP898. This provides us with an opportunity to expand into immuno-oncology. JZP898 is a differentiated, conditionally-activated IFNα INDUKINE™ molecule. We initiated a Phase 1 clinical trial of JZP898 in late 2023.

In April 2025, we completed the acquisition of Chimerix, Inc. for $944.2 million in cash, and Chimerix is now a wholly owned subsidiary of Jazz. The lead clinical asset acquired from Chimerix is Modeyso (dordaviprone), a novel first-in-class small molecule that is a protease activator of the mitochondrial caseinolytic protease P (ClpP) that also inhibits dopamine D2 receptor (DRD2). In August 2025, Modeyso was granted accelerated approval by the FDA for the treatment of adult and pediatric patients 1 year of age and older with diffuse midline glioma harboring an H3 K27M mutation with progressive disease following prior therapy. Modeyso is the first and only treatment option approved by the FDA for this ultra-rare and aggressive brain tumor that mainly affects children and young adults. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the Phase 3 ACTION confirmatory trial. The ongoing Phase 3 ACTION trial is evaluating Modeyso in newly diagnosed, non-recurrent H3 K27M-mutant diffuse glioma patients following radiation treatment, potentially extending this treatment option into the front-line setting.

Our neuroscience R&D efforts include an ongoing Phase 3 trial of Epidyolex for LGS, DS and TSC in Japan. In August 2024, we announced top-line results from the trial. The trial did not meet the primary efficacy endpoint of a pre-specified percentage change in indication-associated seizure frequency during the treatment period (up to 16 weeks) compared to baseline in Japanese pediatric patients; however, numeric improvements were observed in the primary and several secondary endpoints. No new safety signals were observed in the trial. We are continuing to collect data in Japanese patients and plan to engage with regulatory authorities in Japan regarding a potential JNDA.

We are also pursuing early-stage activities related to the development of JZP324, an extended-release low sodium, oxybate formulation that we believe could provide a clinically meaningful option for narcolepsy patients.

In May 2022, we announced that we had entered into a licensing agreement with Sumitomo to acquire exclusive development and commercialization rights in the U.S., Europe and other territories for JZP441, also known as DSP-0187, a potent, highly selective oral orexin-2 receptor agonist with potential application for the treatment of narcolepsy, IH and other sleep disorders. Under the terms of the agreement, we made an upfront payment of $50.0 million to Sumitomo, and Sumitomo is eligible to receive development, regulatory and commercial milestone payments of up to $1.09 billion. If approved, Sumitomo is eligible to receive a tiered, low double-digit royalty on our net sales of JZP441. In November 2023, we announced that we achieved initial proof-of-concept in our Phase 1 clinical trial program in healthy volunteers as demonstrated by the MWT. At that time, we also noted the program was being paused as we analyzed safety findings related to visual disturbances and cardiovascular effects; no liver toxicity signals were observed. Following additional review of the trial findings and input from FDA, we initiated a small Phase 1b trial of JZP441 in narcolepsy Type 1 patients in 2025. We expect

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data from this trial will further our understanding of JZP441 and orexin-2 receptor agonism, providing learnings that could inform future development efforts.

In August 2025, we announced that we entered a global license agreement with Saniona to obtain exclusive worldwide rights to develop SAN2355 for epilepsy and other potential indications. SAN2355 is a preclinical, selective small molecule activator of Kv7.2/Kv7.3 potassium channels, a mechanism validated for seizure suppression. Under the terms of the agreement, we made an upfront payment to Saniona of $42.5 million. Saniona is eligible to receive up to $192.5 million in development and regulatory milestones, up to $800 million in commercial milestone payments and tiered royalties ranging from mid-single digits to low-double digits on net sales of commercial products resulting from the development of SAN2355. This transaction further expands our early-stage neuroscience pipeline building on our existing expertise in the treatment of epilepsy.

Below is a summary of our key ongoing and planned development projects related to our products and pipeline and their corresponding current stages of development:

Product Candidates			Description
ONCOLOGY
Phase 3
Zanidatamab			First-line HER2-positive GEA (ongoing trial)
Zanidatamab			First-line HER2-positive BTC (ongoing confirmatory trial)
Zanidatamab			Previously treated HER2-positive breast cancer in patients whose disease has progressed on previous T-DXd treatment (EmpowHER-BC-303) (ongoing trial)
Dordaviprone			First-line H3 K27M-mutant diffuse glioma (ACTION trial) (ongoing confirmatory trial)
Vyxeos			Newly diagnosed adults with standard- and high-risk AML (AMLSG 30-18) (cooperative group study) (ongoing trial) Newly diagnosed pediatric patients with AML (AAML 1831)(COG cooperative group study) (ongoing trial)
Phase 2
Zanidatamab			Basket trial including HER2-positive solid tumors (DiscovHER-Pan-206) (ongoing trial)
Zanidatamab			Neoadjuvant and adjuvant breast cancer (EmpowHER-BC-208) (ongoing trial)
Vyxeos			High-risk MDS (PALOMA) (cooperative group study) (ongoing trial) Newly diagnosed untreated patients with high-risk AML (MyeloMATCH Tier SWOG) (cooperative group study) (ongoing trial) De novo intermediate or adverse risk AML stratified by genomics (ALFA2101) (collaboration study) (ongoing trial)
Vyxeos + other approved therapies			R/R AML or post-hypomethylating agent failure high-risk MDS (MD Anderson collaboration study) (ongoing trial) De novo or R/R AML (MD Anderson collaboration study) (ongoing trial) AML or high-risk MDS that has IDH1 mutation (MD Anderson collaboration study) (ongoing trial)
Phase 2a
Zanidatamab			Previously treated HER2+ HR+ breast cancer in combination with palbociclib (ongoing trial)
Phase 1b/2
Zanidatamab			First-line breast cancer and GEA (BeiGene trial) (ongoing trial)
Zanidatamab			HER2-expressing breast cancer in combination with ALX148 (ongoing trial)
Phase 1
JZP815			Raf and Ras mutant tumors (acquired from Redx) (ongoing trial)
Zanidatamab			Previously treated metastatic HER2-expressing cancers in combination with select antineoplastic therapies (cooperative group study) (ongoing trial)
JZP898			Conditionally-activated IFNα INDUKINE™ molecule in solid tumors (ongoing trial)
Vyxeos			Low intensity dosing for higher risk MDS (MD Anderson collaboration study) (ongoing trial)

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Product Candidates			Description
JZP3507*			Primary central nervous system tumors (acquired from Chimerix) (ongoing trial)
Preclinical
JZP3508**			Oncology
KRAS inhibitor targets			G12D selective and pan-KRAS molecules (acquired from Redx)
Undisclosed targets			Oncology
CombiPlex®			Hematology/oncology exploratory activities
NEUROSCIENCE
Phase 3
Epidyolex			LGS, TSC and DS (ongoing trial in Japan)
Phase 1
JZP324			Oxybate extended-release formulation (planned trial)
JZP441***			Potent, highly selective oral orexin-2 receptor agonist (ongoing trial)
Preclinical
SAN2355			Epilepsy
Undisclosed targets			Sleep Epilepsy Other Neuroscience

*Also known as ONC206

**Also known as ONC212

***Also known as DSP-0187

Challenges, Risks and Trends Related to Our Business

Historically and in the third quarter of 2025, Xywav revenues meaningfully contributed to our business. Our current 2025 operating plan assumes that Xywav, with 92% lower sodium compared to high-sodium oxybates (depending on the dose), a dosing titration option and an absence of a sodium warning, will remain the #1 branded oxybate treatment for narcolepsy; the position it held based on revenue in the third quarter of 2025. In June 2021, FDA recognized seven years of ODE for Xywav in narcolepsy through July 21, 2027 (which was subsequently extended to January 21, 2028), stating that Xywav is clinically superior to Xyrem by means of greater safety due to reduced chronic sodium burden. While we expect that our business will continue to meaningfully depend on oxybate revenues, there is no guarantee that oxybate revenues will remain at current levels.

Our ability to successfully commercialize Xywav depends on, among other things, our ability to maintain adequate payor coverage and reimbursement for Xywav and acceptance of Xywav by physicians and patients, including of Xywav for the treatment of IH in adults. In an effort to support strong adoption of Xywav and patient success, we are focused on facilitating payor coverage for Xywav and providing robust patient copay and savings programs.

Xywav and Xyrem face competition from Avadel’s Lumryz, a branded product for treatment of cataplexy and/or EDS in narcolepsy, which was launched in the U.S. market in June 2023. In addition, in January 2023, our oxybate products began to face competition from an AG version of high-sodium oxybate pursuant to a settlement agreement we entered into with an ANDA filer. In July 2023, a volume-limited ANDA filer launched an additional AG version of high-sodium oxybate. These AG products have negatively impacted and are expected to continue to negatively impact Xyrem and Xywav sales for patients with narcolepsy. Specifically, a wholly owned subsidiary of Hikma launched its AG version of sodium oxybate in January 2023 and Amneal launched its AG version of sodium oxybate in July 2023. Hikma elected to continue to sell the Hikma AG product, with royalties to be paid to us, for a total of up to four years beginning in January 2024, which election may be terminated by Hikma in accordance with the notice provisions in the agreements between the parties.

Pursuant to amendments to our AG agreement with Hikma, effective January 1, 2026, we have extended the period during which Hikma is permitted to sell the Hikma AG product until December 31, 2029. Either Hikma or Jazz may provide notice of intent to terminate the amended agreement as early as October 1, 2026, in accordance with notice provisions in the agreement. Under these amendments, we continue to have the right to a meaningful royalty from Hikma on net sales of the Hikma AG product throughout the extended Hikma AG period, which royalty rate is fixed through the end of 2025 and then subject to specified reductions as set forth in our agreements with Hikma. We are also paid for supply of the Hikma AG product and are reimbursed by Hikma for a portion of the services costs associated with the operation of the Xywav and Xyrem REMS, and distribution of the Hikma AG product. Hikma also maintains a license to launch its own generic sodium oxybate

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product, but, if it elects to launch its own generic product, Hikma will no longer have the right to sell the Hikma AG product. In addition, Hikma would need to set up its own REMS (or join an existing REMS operated by another company), which must be open to any other company seeking to commercialize a sodium oxybate product.

In our settlements with Amneal, Lupin, and Par, we granted each party the right to sell a limited volume of an AG product in the U.S. beginning on July 1, 2023 and ending on December 31, 2025, with royalties to be paid to us. Amneal launched its AG version of high-sodium oxybate in July 2023. At this time, Amneal has rights to sell a low-single-digit percentage of historical Xyrem sales over each 6-month sales period. At this time, Lupin and Par have elected not to launch an AG product. AG products will be distributed through the same REMS as Xywav and Xyrem. We also granted each of Amneal, Lupin and Par a license to launch its own generic sodium oxybate product under its ANDA on or after December 31, 2025, or earlier under certain circumstances, including the circumstance where Hikma elects to launch its own generic product. In September 2025, FDA approved Amneal's generic high-sodium oxybate product. If Amneal, Lupin or Par elects to launch its own generic product under such circumstance, it will no longer have the right to sell an AG product. In addition, any company commercializing a generic version of high-sodium oxybate would need to establish its own REMS, or join an existing REMS operated by another company.

In the future, we expect our oxybate products to continue to face competition from generic versions of high-sodium oxybate pursuant to settlement agreements we entered into with multiple ANDA filers. In addition, we received notices in June 2021, February 2023 and July 2025 that Lupin, Teva and Granules, respectively, filed ANDAs for generic versions of Xywav. On October 13, 2023, Lupin announced that it has received tentative approval for its application to market a generic version of Xywav. Generic competition can decrease the net prices at which branded products, such as Xywav and Xyrem are sold, as can competition from other branded products. In addition, we have increasingly experienced pressure from third party payors to agree to discounts, rebates or restrictive pricing terms, and we cannot guarantee we will be able to agree to commercially reasonable terms with PBMs, or similar organizations and other third party payors, or that we will be able to ensure patient access and acceptance on formularies. Entering into agreements with PBMs or similar organizations and payors to ensure patient access has and may continue to result in decreased net prices for some of our products. Moreover, generic or AG high-sodium oxybate products or branded high-sodium oxybate entrants in narcolepsy, such as Avadel’s Lumryz, have had and may continue to have the effect of changing payor or formulary coverage of Xywav or Xyrem in favor of other products, and indirectly adversely affect sales of Xywav and Xyrem.

In any event, we expect that the approval and launch of AG products or other generic versions of Xyrem or Xywav and the approval and launch of any other sodium oxybate product, such as Avadel’s Lumryz, or alternative product that treats narcolepsy will continue to have a negative impact on, and could have a material adverse effect on, our sales of Xywav and Xyrem and on our business, financial condition, results of operations and growth prospects.

Our financial condition, results of operations and growth prospects are also dependent on our ability to maintain or increase sales of Epidiolex/Epidyolex in the U.S. and Europe, which is subject to many risks and there is no guarantee that we will be able to continue to successfully commercialize Epidiolex/Epidyolex for its approved indications. The commercial success of Epidiolex/Epidyolex depends on the extent to which patients and physicians accept and adopt Epidiolex/Epidyolex as a treatment for seizures associated with LGS, DS and TSC, and we do not know whether our or others’ estimates in this regard will be accurate. Physicians may not prescribe Epidiolex and patients may be unwilling to use Epidiolex/Epidyolex if coverage is not provided or reimbursement is inadequate to cover a significant portion of the cost. Additionally, any negative development for Epidiolex/Epidyolex in the market, in clinical development for additional indications, or in regulatory processes in other jurisdictions, may adversely impact the commercial results and potential of Epidiolex/Epidyolex. Moreover, we expect that Epidiolex will face competition from generic products in the future. We have settled patent litigation with each of the ten companies seeking to market a generic version of Epidiolex in the U.S. by granting each of the Epidiolex ANDA Filers a license to manufacture, market, and sell its own generic version of Epidiolex beginning in the very late 2030s, or earlier under certain circumstances, including but not limited to the launch of another generic Epidiolex product or a final decision that all unexpired claims of the Epidiolex patents are not infringed, or are invalid and/or unenforceable. In addition, there are non-FDA approved cannabidiol preparations being made available from companies through the state-enabled medical marijuana industry, which might attempt to compete with Epidiolex. Thus, significant uncertainty remains regarding the commercial potential of Epidiolex/Epidyolex.

In addition to our neuroscience products and product candidates, we are commercializing a portfolio of oncology products, including Rylaze, Zepzelca, Ziihera, Modeyso, Defitelio and Vyxeos. An inability to effectively commercialize Rylaze, Zepzelca, Ziihera, Modeyso, Defitelio and Vyxeos and to maximize their potential where possible through successful research and development activities could have a material adverse effect on our business, financial condition, results of operations and growth prospects.

A key aspect of our growth strategy is our continued investment in our evolving and expanding R&D activities. If we are not successful in the clinical development of our product candidates, if we are unable to obtain regulatory approval for our product candidates in a timely manner, or at all, or if sales of an approved product do not reach the levels we expect, our

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anticipated revenue from our product candidates would be negatively affected, which could have a material adverse effect on our business, financial condition, results of operations and growth prospects.

In addition to continued investment in our R&D pipeline, we intend to continue to grow our business by acquiring or in-licensing, and developing, including with collaboration partners, additional products and product candidates that we believe are highly differentiated and have significant commercial potential. Failure to identify and acquire, in-license or develop additional products or product candidates, successfully manage the risks associated with integrating any products or product candidates into our portfolio or the risks arising from anticipated and unanticipated problems in connection with an acquisition or in-licensing, such as the GW Acquisition and our recent acquisition of Chimerix, could have a material adverse effect on our business, results of operations and financial condition.

Our industry has been, and is expected to continue to be, subject to healthcare cost containment and drug pricing scrutiny by regulatory agencies in the U.S. and internationally. If new healthcare policies or reforms intended to curb healthcare costs are adopted or if we experience negative publicity with respect to pricing of our products or the pricing of pharmaceutical drugs generally, the prices that we charge for our products may be affected, our commercial opportunity may be limited and/or our revenues from sales of our products may be negatively impacted. For example, the Inflation Reduction Act of 2022 among other things, requires the U.S. Department of Health and Human Services Secretary to negotiate, with respect to Medicare units and subject to a specified cap, the price of a set number of certain high Medicare spend drugs and biologicals per year starting in 2026, penalizes manufacturers of certain Medicare Parts B and D drugs for price increases above inflation, and makes several changes to the Medicare Part D benefit, including a limit on annual out-of-pocket costs and a change in manufacturer liability under the program, that could negatively affect our business and financial condition. In addition, under the Medicaid Drug Rebate Program, rebates owed by manufacturers are no longer subject to a cap on the rebate amount, which could adversely affect our rebate liability. Moreover, in May 2025, the White House issued an Executive Order directing federal agencies to pursue “Most Favored Nation” pricing for certain prescription drugs, under which U.S. prices would be indexed to the lowest prices available in select OECD countries and on September 30, 2025, the current administration announced the first agreement (of several agreements) with a major pharmaceutical company that requires the drug manufacturer to offer, through a direct to consumer platform, U.S. patients and Medicaid programs prescription drug “Most Favored Nation” pricing equal to or lower than those paid in other developed nations, with additional mandates for direct-to-patient discounts and repatriation of foreign revenues. The White House is currently seeking voluntary pricing concessions from certain manufacturers, with the potential for administrative action to follow if companies do not engage constructively, creating uncertainty around future pricing and reimbursement that could negatively impact our U.S. revenues and overall business performance. We are also subject to increasing pricing pressure and restrictions on reimbursement imposed by payors. If we fail to obtain and maintain adequate formulary positions and institutional access for our current products and future approved products, we will not be able to achieve a return on our investment and our business, financial condition, results of operations and growth prospects would be materially adversely affected.

While certain preparations of cannabis remain Schedule I controlled substances, if such products are approved by FDA for medical use in the U.S. they are rescheduled to Schedules II-V, since approval by FDA satisfies the “accepted medical use” requirement; or such products may be removed from control under the Controlled Substances Act entirely. If any of our product candidates receive FDA approval, the Department of Health and Human Services and the U.S. Drug Enforcement Administration will make a scheduling determination. U.S. or foreign regulatory agencies may request additional information regarding the abuse potential of our products which may require us to generate more clinical or other data than we currently anticipate to establish whether or to what extent the substance has an abuse potential, which could increase the cost, delay the approval and/or delay the launch of that product.

In addition, business practices by pharmaceutical companies, including product formulation improvements, patent litigation settlements, and REMS programs, have increasingly drawn public scrutiny from legislators and regulatory agencies, with allegations that such programs are used as a means of improperly blocking or delaying competition. Government investigations with respect to our business practices, including as they relate to the Xywav and Xyrem REMS, the launch of Xywav, our Xyrem patent litigation settlement agreements or otherwise, could cause us to incur significant monetary charges to resolve these matters and could distract us from the operation of our business and execution of our strategy. In addition, from June 2020 to May 2022, a number of lawsuits were filed on behalf of purported direct and indirect Xyrem purchasers, alleging that the patent litigation settlement agreements we entered with certain generic companies violate state and federal antitrust and consumer protection laws. For additional information on these lawsuits, as well as a class settlement agreement with respect thereto and other legal matters, see Note 10, Commitments and Contingencies-Legal Proceedings of the Notes to Consolidated Financial Statements, included in Part I, Item 1 of this Quarterly Report on Form 10‑Q. It is possible that additional lawsuits will be filed against us making similar or related allegations. We cannot predict the outcome of these or potential additional lawsuits; however, if the plaintiffs were to be successful in their claims against us, they may be entitled to injunctive relief or we may be required to pay significant monetary damages. Moreover, we are, and expect to continue to be, the subject of various claims, legal proceedings, and government investigations apart from those set forth above that have arisen in the ordinary course of business that have not yet been fully resolved and that could adversely affect our business and the execution

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of our strategy. Any of the foregoing risks and uncertainties could have a material adverse effect on our business, financial condition, results of operations and growth prospects.

Finally, the U.S. government has imposed and may seek to impose additional restrictions on international trade, such as tariffs on goods generally, and pharmaceutical and biological products in particular, imported into the U.S. In anticipation of the potential for increased tariffs on our products, we have increased inventory levels of our products in the U.S. We conduct our business globally and have third-party suppliers located outside the U.S., including in China. In addition, we have a manufacturing and development facility in Athlone, Ireland where we manufacture Xywav and Xyrem, a manufacturing and development facility in Kent Science Park, U.K. where we produce Epidiolex/Epidyolex, and a manufacturing plant in Villa Guardia, Italy where we produce defibrotide drug substance. While we cannot at this time predict the ultimate impact of such tariffs, we anticipate that our margins could be adversely affected beginning as early as fiscal 2026, depending on the ultimate scope and duration of tariffs imposed. However, given the volatility and uncertainty regarding the scope and duration of such tariffs and other aspects of U.S. and foreign government trade policies, the ultimate impact on our operations and financial results remains uncertain and could be significant. See “Global trade issues and changes in and uncertainties with respect to trade policies and export regulations, including import and export license requirements, trade sanctions, tariffs and international trade disputes, could increase our costs, reduce the competitiveness of our products and otherwise have a material adverse effect on our business, financial condition, results of operations and growth prospects” in Part II, Item 1A of this Quarterly Report on Form 10-Q.

The foregoing risks and uncertainties are discussed in greater detail, along with other risks and uncertainties, in “Risk Factors” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, as supplemented by the risks and uncertainties described in "Risk Factors" in Part II, Item 1A of this Quarterly Report on Form 10-Q.

Results of Operations

The following table presents our revenues and expenses (in thousands, except percentages): 

			Three Months Ended September 30,												Increase/						Nine Months Ended September 30,												Increase/
			2025						2024						(Decrease)						2025						2024						(Decrease)
Product sales, net			$	1,064,412					$	989,707					8		%				$	2,889,401					$	2,795,953					3		%
Royalties and contract revenues			61,695						65,262						(5)		%				180,259						184,824						(2)		%
Cost of product sales (excluding amortization of acquired developed technologies)			128,880						111,611						15		%				349,768						317,000						10		%
Selling, general and administrative			530,647						325,772						63		%				1,403,059						1,016,007						38		%
Research and development			198,203						199,919						(1)		%				568,827						643,500						(12)		%
Intangible asset amortization			168,368						157,457						7		%				484,919						468,410						4		%
Acquired in-process research and development			42,500						—						N/A(1)						947,862						10,000						N/A(1)
Interest expense, net			48,576						58,702						(17)		%				149,645						186,841						(20)		%
Foreign exchange (gain) loss			(102)						701						(115)		%				1,910						1,887						1		%
Income tax benefit			(242,424)						(14,533)						N/A(1)						(277,406)						(33,517)						N/A(1)
Equity in loss of investees			47						285						(84)		%				675						1,644						(59)		%

____________________________

(1)Comparison to prior period not meaningful.

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Revenues

The following table presents our net product sales, royalties and contract revenues, and total revenues (in thousands, except percentages):

			Three Months Ended September 30,												Increase/						Nine Months Ended September 30,												Increase/
			2025						2024						(Decrease)						2025						2024						(Decrease)
Xywav			$	431,410					$	388,466					11		%				$	1,191,535					$	1,072,238					11		%
Xyrem			35,663						58,114						(39)		%				108,253						184,526						(41)		%
Epidiolex/Epidyolex			302,608						251,558						20		%				772,075						697,376						11		%
Sativex			4,752						4,586						4		%				14,774						13,704						8		%
Total Neuroscience			774,433						702,724						10		%				2,086,637						1,967,844						6		%
Rylaze/Enrylaze			99,868						98,780						1		%				294,760						309,359						(5)		%
Zepzelca			79,295						85,843						(8)		%				216,869						241,990						(10)		%
Defitelio/defibrotide			51,752						65,818						(21)		%				140,520						158,915						(12)		%
Vyxeos			37,583						34,313						10		%				111,978						109,348						2		%
Ziihera			8,306						—						N/A(1)						16,272						—						N/A(1)
Modeyso			11,032						—						N/A(1)						11,502						—						N/A(1)
Total Oncology			287,836						284,754						1		%				791,901						819,612						(3)		%
Other			2,143						2,229						(4)		%				10,863						8,497						28		%
Product sales, net			1,064,412						989,707						8		%				2,889,401						2,795,953						3		%
High-sodium oxybate AG royalty revenue			52,945						58,157						(9)		%				156,029						162,268						(4)		%
Other royalty and contract revenues			8,750						7,105						23		%				24,230						22,556						7		%
Total revenues			$	1,126,107					$	1,054,969					7		%				$	3,069,660					$	2,980,777					3		%

___________________________

(1)Comparison to prior period not meaningful.

Total Revenues

Xywav product sales increased in the three and nine months ended September 30, 2025, compared to the same periods in 2024, primarily due to increased sales volumes of 14% in both periods and, to a lesser extent, a higher selling price, partially offset by higher gross to net deductions. We continue to see Xywav adoption in patients with narcolepsy driven by educational initiatives around efficacy and the benefit of lowering sodium intake. In addition, Xywav product sales were positively impacted by adoption in IH; Xywav is the only oxybate therapy approved to treat IH and we see continued growth of new prescribers. Exiting the quarter, there were 10,725 patients taking Xywav for narcolepsy and 4,950 taking Xywav for IH, an increase of approximately 6% and 39%, respectively, compared to the same period in 2024. Xyrem product sales decreased in the three and nine months ended September 30, 2025, compared to the same periods in 2024, primarily due to decreased sales volumes of 27% and 35% in the respective periods, due to high-sodium oxybate competition and the adoption of Xywav by existing patients, and higher gross to net deductions, partially offset by a higher selling price. Epidiolex/Epidyolex product sales increased in the three months ended September 30, 2025, compared to the same period in 2024, primarily due to increased sales volumes of 10%, driven by increased demand, lower gross to net deductions, driven by a release of reserves following refinement of certain accrual rates in the U.S., and to a lesser extent, a higher average selling price. Epidiolex/Epidyolex product sales increased in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to increased sales volumes of 8%, due to increased demand and a higher average selling price.

Rylaze/Enrylaze product sales in the three months ended September 30, 2025 were broadly in line with the same period in 2024. Rylaze/Enrylaze product sales decreased in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to decreased sales volumes of 2% and higher gross to net deductions, offset by a higher average selling price. Following updates to pediatric treatment protocols for ALL which have been broadly adopted, pediatric asparaginase use as a class remains below levels seen prior to protocol implementation in the second half of 2024. Rylaze use within the asparaginase class remains broadly stable. Zepzelca product sales decreased in the three and nine months ended September 30, 2025, compared to the same periods in 2024, primarily due to decreased sales volumes, offset by a higher selling price and lower gross to net deductions. Zepzelca product sales have been impacted by increased competition in second-line SCLC and treatment protocol updates delaying progression of first-line limited-stage SCLC patients to the second-line setting. In October, Zepzelca and atezolizumab combination was approved as a maintenance treatment for adults with ES-SCLC whose disease has not progressed after first-line induction therapy with atezolizumab, carboplatin and etoposide. Defitelio/defibrotide product sales decreased in the three and nine months ended September 30, 2025, compared to the same periods in 2024,

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primarily due to decreased sales volumes, partially offset by a higher average selling price. Vyxeos product sales increased in the three months ended September 30, 2025, compared to the same period in 2024, due to a higher average selling price due to regional mix and the positive impact of foreign exchange rates, partially offset by a decrease in sales volumes. Vyxeos product sales increased in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to an increase in sales volumes and the positive impact of foreign exchange rates, offset by a lower average selling price due to regional mix.

Royalties and contract revenues decreased in the three and nine months ended September 30, 2025, compared to the same periods in 2024, primarily due to a decrease in royalty revenue received from Hikma on net sales of their high sodium oxybate AG.

We expect total revenues will increase in 2025 over 2024, primarily driven by growth across our commercial portfolio, offset by a decrease in sales of Xyrem due to the impact of high-sodium oxybate competition.

Cost of Product Sales

Cost of product sales increased in the three months ended September 30, 2025, compared to the same period in 2024, primarily due to increased inventory provisions, a higher fair value step-up expense of $5.3 million and changes in product mix. Cost of product sales increased in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to changes in product mix, a higher fair value step-up expense of $10.1 million and increased inventory provisions. Gross margin as a percentage of net product sales was 87.9% for both the three and nine months ended September 30, 2025, compared to 88.7% for the same periods in 2024. We expect our cost of product sales to increase in 2025 compared to 2024, primarily driven by changes in product mix.

Selling, General and Administrative Expenses

Selling, general and administrative expenses increased in the three months ended September 30, 2025, compared to the same period in 2024, primarily due to the Avadel litigation settlement of $90.0 million and a Xyrem antitrust litigation settlement of $61.5 million, an increase in compensation-related expenses of $37.6 million, primarily driven by increased share-based compensation expense and higher headcount, increased investment in sales and marketing of $16.3 million in support of our commercial portfolio and included integration expenses related to the Chimerix Acquisition of $9.3 million. Selling, general and administrative expenses increased in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to Xyrem antitrust litigation settlements of $233.5 million, the Avadel litigation settlement of $90.0 million and an increase in compensation-related expenses of $65.1 million, primarily driven by higher headcount and increased share-based compensation expense, and included integration expenses related to the Chimerix Acquisition of $16.4 million.

We expect selling, general and administrative expenses in 2025 to increase compared to 2024, primarily due to litigation settlement expenses, the inclusion of costs relating to Chimerix, investment in our commercial portfolio, including the launch of Ziihera, along with increased compensation-related expenses.

Research and Development Expenses

Research and development expenses consist primarily of costs related to clinical studies and outside services, personnel expenses and other research and development costs. Clinical study and outside services costs relate primarily to services performed by clinical research organizations, materials and supplies, and other third party fees. Personnel expenses relate primarily to salaries, benefits and share-based compensation. Other research and development expenses primarily include overhead allocations consisting of various support and facilities-related costs. We do not track fully-burdened research and development expenses on a project-by-project basis. We manage our research and development expenses by identifying the research and development activities that we anticipate will be performed during a given period and then prioritizing efforts based on our assessment of which development activities are important to our business and have a reasonable probability of success, and by dynamically allocating resources accordingly. We also continually review our development pipeline projects and the status of their development and, as necessary, reallocate resources among our development pipeline projects that we believe will best support the future growth of our business.

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The following table provides a breakout of our research and development expenses by major categories of expense (in thousands):

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
Clinical studies and outside services			$	93,125					$	108,362					$	273,567					$	373,946
Personnel expenses			76,387						71,081						226,185						212,382
Other			28,691						20,476						69,075						57,172
Total			$	198,203					$	199,919					$	568,827					$	643,500

Research and development expenses decreased by $1.7 million and $74.7 million in the three and nine months ended September 30, 2025, compared to the same periods in 2024, driven by a reduction in clinical studies and outside services costs, primarily due to lower costs related zanidatamab, as a result of timing of clinical trial activities, JZP385 (essential tremor) following discontinuation of this program and lower costs relating to JZP258 (XYLO/DUET) due to the completion of this trial in the first half of 2025, partially offset by the addition of costs relating to Modeyso following the Chimerix Acquisition. Other research and development expenses in the three and nine months ended September 30, 2025 included integration expenses related to the Chimerix Acquisition of $6.5 million and $8.7 million, respectively.

For 2025, we expect that our research and development expenses will decrease compared to 2024, primarily driven by a reduction in clinical studies and outside services costs relating to zanidatamab, JZP385 and continued portfolio prioritization, partially offset by the inclusion of costs associated with the development of Modeyso.

Intangible Asset Amortization

Intangible asset amortization increased in the three and nine months ended September 30, 2025, compared with the same periods in 2024, primarily due to the impact of foreign currency translation on our sterling denominated assets.

Acquired In-Process Research and Development

Acquired IPR&D expense in the three and nine months ended September 30, 2025 includes the upfront payment made in connection with our global license agreement with Saniona. Additionally, acquired IPR&D expense in the nine months ended September 30, 2025 includes the value allocated to Modeyso in the Chimerix Acquisition.

Interest Expense, Net

Interest expense, net decreased by $10.1 million and $37.2 million in the three and nine months ended September 30, 2025, respectively, compared to the same periods in 2024, primarily due to lower interest expense on the Tranche B-2 Dollar Term Loans, partially offset by the inclusion of interest expense on the 2030 Notes and lower interest income as a result of lower cash reserves due to the Chimerix Acquisition and reduced interest rates.

Income Tax Benefit

Our income tax benefit was $242.4 million and $277.4 million for the three and nine months ended September 30, 2025, respectively, and arose primarily due to the reversal of a valuation allowance against certain U.S. federal and state deferred tax assets acquired through the Chimerix Acquisition. This compared to an income tax benefit of $14.5 million and $33.5 million for the same periods in 2024. Apart from the reversal of the valuation allowance, the income tax benefits related to tax arising on income or losses in Ireland, the U.K., the U.S. and certain other foreign jurisdictions and Pillar Two top-up taxes, offset by deductions on subsidiary equity, patent box and foreign derived intangible income benefits and tax credits.

Liquidity and Capital Resources

As of September 30, 2025, we had cash, cash equivalents and investments of $2.0 billion, borrowing available under our Amended Revolving Credit Facility of $885.0 million and a long-term debt principal balance of $5.4 billion. Our long-term debt included $1.9 billion aggregate principal amount of the Tranche B-2 Dollar Term Loans, $1.5 billion in aggregate principal amount of the Secured Notes, $1.0 billion aggregate principal amount of the 2026 Notes, and $1.0 billion aggregate principal amount of the 2030 Notes. We generated cash flows from operations of $993.3 million during the nine months ended September 30, 2025, and we expect to continue to generate positive cash flows from operations which will enable us to operate our business and de-lever our balance sheet over time.

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Since the closing of the acquisition of GW in May 2021, we have fully repaid our Euro Term Loan. With respect to our Tranche B-2 Dollar Term Loans, we have made voluntary repayments of $1.1 billion, $300.0 million in September 2022 and $750.0 million in January 2025, along with mandatory repayments $131.8 million. In August 2024, we repaid the $575.0 million aggregate principal amount of our 2024 Notes.

We have a significant amount of debt outstanding on a consolidated basis. For further information, including details relating to our scheduled maturities with respect to our long-term debt, see Note 9, Debt, of the Notes to Condensed Consolidated Financial Statements, included in Part I, Item 1 of this Quarterly Report on Form 10‑Q. This substantial level of debt could have important consequences to our business, including, but not limited to the factors set forth in “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2024, under the heading “We have incurred substantial debt, which could impair our flexibility and access to capital and adversely affect our financial position, and our business would be adversely affected if we are unable to service our debt obligations.”

We believe that our existing cash, cash equivalents and investments balances, cash we expect to generate from operations and funds available under our Amended Revolving Credit Facility will be sufficient to fund our operations and to meet our existing obligations for the foreseeable future. The adequacy of our cash resources depends on many assumptions, including primarily our assumptions with respect to product sales and expenses, as well as the other factors set forth in "Risk Factors" under the heading "Risks Related to our Lead Products and Product Candidates” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, as supplemented by the risks described in “Risk Factors" under the heading “Delays or problems in the supply of our products for sale or for use in clinical trials, loss of our single source suppliers or failure to comply with manufacturing regulations could materially and adversely affect our business, financial condition, results of operations and growth prospects” in Part II, Item 1A of this Quarterly Report on Form 10-Q, as well as those factors set forth in “Risk Factors" under the heading and “To continue to grow our business, we will need to commit substantial resources, which could result in future losses or otherwise limit our opportunities or affect our ability to operate and grow our business” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024.

Our assumptions may prove to be wrong or other factors may adversely affect our business, and as a result we could exhaust or significantly decrease our available cash resources, and we may not be able to generate sufficient cash to service our debt obligations which could, among other things, force us to raise additional funds and/or force us to reduce our expenses, either of which could have a material adverse effect on our business.

To continue to grow our business over the longer term, we plan to commit substantial resources to product acquisition and in-licensing, product development, clinical trials of product candidates and expansion of our commercial, development, manufacturing and other operations. In this regard, we have evaluated and expect to continue to evaluate a wide array of strategic transactions as part of our strategy to acquire or in-license and develop additional products and product candidates. Acquisition opportunities that we pursue could materially affect our liquidity and capital resources and may require us to incur additional indebtedness, seek equity capital or both. We regularly evaluate the performance of our products and product candidates to ensure fit within our portfolio and support efficient allocation of capital. In addition, we may pursue new operations or continue the expansion of our existing operations. Accordingly, we expect to continue to opportunistically seek access to additional capital to license or acquire additional products, product candidates or companies to expand our operations, to restructure or refinance our debt and/or for general corporate purposes. Raising additional capital could be accomplished through one or more public or private debt or equity financings, collaborations or partnering arrangements. However, our ability to raise additional capital may be adversely impacted by worsening global economic conditions and the recent disruptions to, and volatility in, the credit and financial markets in the U.S. and worldwide resulting from the effects of inflationary pressures, potential future bank failures, or otherwise. Accordingly, we could experience an inability to access additional capital or our liquidity could otherwise be impacted, which could in the future negatively affect our capacity for certain corporate development transactions or our ability to make other important, opportunistic investments. In addition, under Irish law we must have authority from our shareholders to issue any ordinary shares, including ordinary shares that are part of our authorized but unissued share capital, and we currently have such authorization. Moreover, as a matter of Irish law, when an Irish public limited company issues ordinary shares to new shareholders for cash, the company must first offer those shares on the same or more favorable terms to existing shareholders on a pro rata basis, unless this statutory pre-emption obligation is dis-applied, or opted-out of, by approval of its shareholders. At our annual general meeting of shareholders in July 2025, our shareholders voted to approve our proposal to dis-apply the statutory pre-emption obligation. This current pre-emption opt-out authority is due to expire in January 2027. If we are unable to obtain further pre-emption authorities from our shareholders in the future, or otherwise continue to be limited by the terms of new pre-emption authorities approved by our shareholders in the future, our ability to use our unissued share capital to fund in-licensing, acquisition or other business opportunities, or to otherwise raise capital, including at the time we are required to make repurchases of the 2026 Notes, the 2030 Notes and/or the Secured Notes, are required to repay outstanding amounts under the Amended Credit Agreement, or pay cash upon exchange of the 2026 Notes or the 2030 Notes, could likewise be adversely affected. In any event, an inability to borrow or raise additional capital in a timely manner and on attractive terms could prevent us from expanding our business or taking advantage of acquisition opportunities and could otherwise have a material adverse effect on our business and growth prospects. In addition,

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if we use a substantial amount of our funds to acquire or in-license products or product candidates, we may not have sufficient additional funds to conduct all of our operations in the manner we would otherwise choose. Furthermore, any equity financing would be dilutive to our shareholders, and could require the consent of the lenders under the Amended Credit Agreement that provides for (i) the Tranche B-2 Dollar Term Loans and Amended Revolving Credit Facility, and the indenture for the Secured Notes for certain financings.

In July 2024, our board of directors authorized the New Repurchase Program, to repurchase ordinary shares having an aggregate purchase price of $500.0 million, exclusive of any brokerage commissions. Under the New Repurchase Program, which has no expiration date, we may repurchase ordinary shares from time to time by any methods and/or structures permitted by applicable law. The timing and amount of repurchases will depend on a variety of factors, including the price of our ordinary shares, alternative investment opportunities, restrictions under the Amended Credit Agreement and the indenture for our Secured Notes, corporate and regulatory requirements and market conditions. The New Repurchase Program may be modified, suspended or discontinued at any time without our prior notice. The New Repurchase Program replaces and supersedes the Old Repurchase Program, a share repurchase program to repurchase ordinary shares having an aggregate purchase price of $1.5 billion, exclusive of any brokerage commissions. During the three months ended September 30, 2025, no shares were repurchased. During the nine months ended September 30, 2025, we spent a total of $125.0 million to repurchase 1.1 million of our ordinary shares, all under the New Repurchase Program, at a purchase price, including commissions, of $109.52 per share. During the three months ended September 30, 2024, we spent a total of $150.0 million to repurchase 1.4 million of our ordinary shares, all under the New Repurchase Program, at a purchase price, including commissions, of $109.32 per share. The repurchases during the three months ended September 30, 2024, were effected in privately negotiated transactions with or through one of the initial purchasers of the 2030 Notes concurrently with the pricing of the offering of the 2030 Notes. During the nine months ended September 30, 2024, we spent a total of $150.0 million to repurchase 1.4 million of our ordinary shares, all under the New Repurchase Program, at a purchase price, including commissions, of $109.32 per share and $161.4 million to repurchase 1.5 million of our ordinary shares, all under the Old Repurchase Program, at a purchase price, including commissions, of $110.75 per share. As of September 30, 2025, the remaining amount authorized for repurchases under the New Repurchase Program was $225.0 million, exclusive of any brokerage commissions.

The following table presents a summary of our cash flows for the periods indicated (in thousands):

			Nine Months Ended September 30,
			2025						2024
Net cash provided by operating activities			$	993,255					$	997,328
Net cash used in investing activities			(1,137,751)						(314,908)
Net cash provided by (used in) financing activities			(948,820)						28,791
Effect of exchange rates on cash and cash equivalents			6,522						614
Net increase (decrease) in cash and cash equivalents			$	(1,086,794)					$	711,825

Operating activities

Net cash provided by operating activities in the nine months ended September 30, 2025 is broadly in line with the same period in 2024.

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Investing activities

Net cash used in investing activities increased by $822.8 million in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to the following:

•$858.1 million outflow related to the net cash paid for the Chimerix Acquisition;

•$55.0 million increase in acquisition of intangible assets related to the milestone payments following FDA approval of Modeyso and Ziihera in BTC; and

•$32.5 million increase in upfront payments for acquired IPR&D driven by the $42.5 million payment to Saniona in the nine months ended September 30, 2025, offset by the $10.0 million payment to Redx in the nine months ended September 30, 2024; partially offset by

•$140.0 million net increase in the proceeds from maturity of investments, driven by time deposits.

Financing activities

Net cash provided by (used in) financing activities decreased by $977.6 million in the nine months ended September 30, 2025, compared to the same period in 2024, primarily due to:

•The $750.0 million voluntary repayment on the Tranche B-2 Dollar Term Loan in January 2025; and

•Net proceeds from the issuance of the 2030 Notes of $980.8 million in the nine months ended September 30, 2024; partially offset by

•The repayment of the 2024 Notes of $575.0 million in the nine months ended September 30, 2024; and

•A decrease of $186.4 million in share repurchases.

Debt

The summary of our outstanding indebtedness and scheduled maturities with respect to our long-term debt principal balances is included in Note 9, Debt, of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q. In January 2025, we made a voluntary repayment on the Tranche B-2 Dollar Term Loans totaling $750.0 million.

During the nine months ended September 30, 2025, there were no other changes to our financing arrangements, as set forth in Note 11, Debt, of the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2024.

Contractual Obligations

During the nine months ended September 30, 2025, there were no material changes to our contractual obligations as set forth in Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2024 other than the assumption of potential future milestone payments, totaling $312.0 million, and royalty obligations in the Chimerix Acquisition, as well as potential future milestone payments, totaling $992.5 million, and royalty obligations related to the Saniona license agreement.

Critical Accounting Estimates

To understand our financial statements, it is important to understand our critical accounting estimates. The preparation of our financial statements in conformity with U.S. generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions are required in determining the amounts to be deducted from gross revenues and also with respect to the acquisition and valuation of intangibles and income taxes. Some of these judgments can be subjective and complex, and, consequently, actual results may differ from these estimates. For any given individual estimate or assumption we make, there may also be other estimates or assumptions that are reasonable. Although we believe our estimates and assumptions are reasonable, they are based upon information available at the time the estimates and assumptions were made.

Our critical accounting policies and significant estimates are detailed in our Annual Report on Form 10‑K for the year ended December 31, 2024. Our critical accounting policies and significant estimates have not changed substantially from those previously disclosed in our Annual Report on Form 10‑K for the year ended December 31, 2024.

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Cautionary Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10‑Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are subject to the “safe harbor” created by those sections. Forward-looking statements are based on our management’s current plans, objectives, estimates, expectations and intentions and on information currently available to our management. In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “could,” “would,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “project,” “predict,” “propose,” “intend,” “continue,” “potential,” “possible,” “foreseeable,” “likely,” “unforeseen” and similar expressions intended to identify forward-looking statements. These statements involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance, time frames or achievements to be materially different from any future results, performance, time frames or achievements expressed or implied by the forward-looking statements. These known and unknown risks, uncertainties and other factors include, without limitation:

•Our inability to maintain revenues from our oxybate franchise would have a material adverse effect on our business, financial condition, results of operations and growth prospects.

•The introduction of new products in the U.S. market that compete with, or otherwise disrupt the market for, our oxybate products has adversely affected and may continue to adversely affect sales of our oxybate products.

•The distribution and sale of our oxybate products are subject to significant regulatory restrictions, including the requirements of a REMS and safety reporting requirements, and these regulatory and safety requirements subject us to risks and uncertainties, any of which could negatively impact sales of Xywav and Xyrem.

•Our inability to maintain or increase sales of Epidiolex/Epidyolex would have a material adverse effect on our business, financial condition, results of operations and growth prospects.

•While we expect Xywav and Epidiolex/Epidyolex to remain our largest products, our success also depends on our ability to effectively commercialize our other existing products and potential future products.

•We face substantial competition from other companies, including companies with larger sales organizations and more experience working with large and diverse product portfolios, and competition from generic drugs.

•Adequate coverage and reimbursement from third party payors may not be available for our products and we may be unable to successfully contract for coverage from PBMs and other organizations; conversely, to secure coverage from these organizations, we may be required to pay rebates or other discounts or other restrictions to reimbursement, either of which could diminish our sales or adversely affect our ability to sell our products profitably.

•The pricing of pharmaceutical products has come under increasing scrutiny as part of a global trend toward healthcare cost containment and resulting changes in healthcare law and policy, including changes to Medicare, may impact our business in ways that we cannot currently predict, which could have a material adverse effect on our business and financial condition.

•In addition to access, coverage and reimbursement, the commercial success of our products depends upon their market acceptance by physicians, patients, third party payors and the medical community.

•Delays or problems in the supply of our products for sale or for use in clinical trials, loss of our single source suppliers or failure to comply with manufacturing regulations could materially and adversely affect our business, financial condition, results of operations and growth prospects.

•Global trade issues and changes in and uncertainties with respect to trade policies and export regulations, including import and export license requirements, trade sanctions, tariffs and international trade disputes, could increase our costs, reduce the competitiveness of our products and otherwise have a material adverse effect on our business, financial condition, results of operations and growth prospects.

•We may not realize the anticipated benefits from our acquisition of Chimerix.

•Our future success depends on our ability to successfully obtain and maintain regulatory approvals for our late-stage product candidates and, if approved, to successfully launch and commercialize those product candidates.

•We may not be able to successfully identify and acquire or in-license additional products or product candidates to grow our business, and, even if we are able to do so, we may otherwise fail to realize the anticipated benefits of these transactions.

•Conducting clinical trials is costly and time-consuming, and the outcomes are uncertain. A failure to prove that our product candidates are safe and effective in clinical trials, or to generate data in clinical trials to support expansion of

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the therapeutic uses for our existing products, could materially and adversely affect our business, financial condition, results of operations and growth prospects.

•It is difficult and costly to protect our proprietary rights, and we may not be able to ensure their protection.

•We have incurred, and may in the future incur, substantial costs as a result of litigation or other proceedings relating to patents, other intellectual property rights and related matters, and we may be unable to protect our rights to, or commercialize, our products.

•Significant disruptions of information technology systems or data security incidents could adversely affect our business.

•We are subject to significant ongoing regulatory obligations and oversight, which may subject us to civil or criminal proceedings, investigations, or penalties and may result in significant additional expense and limit our ability to commercialize our products.

•If we fail to comply with our reporting and payment obligations under the Medicaid Drug Rebate program or other governmental pricing programs, we could be subject to additional reimbursement requirements, penalties, sanctions and fines, which could have a material adverse effect on our business, financial condition, results of operations and growth prospects.

•We have incurred substantial debt, which could impair our flexibility and access to capital and adversely affect our financial position, and our business would be adversely affected if we are unable to service our debt obligations.

•To continue to grow our business, we will need to commit substantial resources, which could result in future losses or otherwise limit our opportunities or affect our ability to operate and grow our business.

•If we fail to attract, retain and motivate members of our executive management team and key personnel, our operations and our future growth may be adversely affected.

Additional discussion of the risks, uncertainties and other factors described above, as well as other risks material to our business, can be found under “Risk Factors” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, as supplemented by the risks and uncertainties described in "Risk Factors" Part II, Item 1A. in this Quarterly Report on Form 10-Q.

Given these risks, uncertainties and other factors, you should not place undue reliance on these forward-looking statements. Also, these forward-looking statements represent our plans, objectives, estimates, expectations and intentions only as of the date of this filing. You should read this Quarterly Report on Form 10‑Q completely and with the understanding that our actual future results and the timing of events may be materially different from what we expect. We hereby qualify our forward-looking statements by our cautionary statements. Except as required by law, we undertake no obligation to update or supplement any forward-looking statements publicly, or to update or supplement the reasons that actual results could differ materially from those anticipated in these forward-looking statements, even if new information becomes available in the future.

Item 3.Quantitative and Qualitative Disclosures About Market Risk

During the nine months ended September 30, 2025, there were no material changes to our market risk disclosures as set forth in Part II, Item 7A “Quantitative and Qualitative Disclosures About Market Risk” in our Annual Report on Form 10-K for the year ended December 31, 2024.

Item 4.Controls and Procedures

Evaluation of Disclosure Controls and Procedures. We have carried out an evaluation under the supervision and with the participation of management, including our principal executive officer and principal financial officer, of our disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) of the Exchange Act) as of the end of the period covered by this Quarterly Report on Form 10‑Q. Based on their evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective as of September 30, 2025.

Limitations on the Effectiveness of Controls.  A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues, if any, within an organization have been detected. Accordingly, our disclosure controls and procedures are designed to provide reasonable, not absolute, assurance that the objectives of our disclosure control system are met and, as set forth above, our principal executive officer and principal financial officer have concluded, based on their evaluation as of the end of the period covered by this report, that our

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disclosure controls and procedures were effective to provide reasonable assurance that the objectives of our disclosure control system were met.

Changes in Internal Control over Financial Reporting.  During the quarter ended September 30, 2025, there were no changes to our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II – OTHER INFORMATION

Item 1.Legal Proceedings

The information required to be set forth under this Item 1 is incorporated by reference to Note 10, Commitments and Contingencies—Legal Proceedings of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10‑Q.

Item 1A.Risk Factors

Below we are providing, in supplemental form, changes to our risk factors from those previously disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024. Our risk factors disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, provide additional discussion regarding these supplemental risks and we encourage you to read and carefully consider all of the risk factors disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2024, together with the below, for a more complete understanding of the risks and uncertainties material to our business.

Our inability to maintain revenues from our oxybate franchise would have a material adverse effect on our business, financial condition, results of operations and growth prospects.

Historically, our business was substantially dependent on Xyrem, and our financial results were significantly influenced by sales of Xyrem. Our current 2025 operating plan assumes that Xywav, with 92% lower sodium compared to high-sodium oxybates (depending on the dose) and absence of a sodium warning, will remain the #1 branded oxybate treatment for narcolepsy; the position it held based on revenue in the third quarter of 2025. While we expect that our business will continue to be meaningfully dependent on oxybate revenues, there is no guarantee that oxybate revenues will remain at current levels. In this regard, our ability to maintain oxybate revenues and realize the anticipated benefits from our investment in Xywav are subject to a number of risks and uncertainties as discussed in greater detail below, including: those related to the commercialization of Xywav for the treatment of IH in adults and adoption in that indication; competition from the introduction of AG versions of high-sodium oxybate and branded products, such as Avadel’s once-nightly dose, high-sodium oxybate branded product Lumryz, for treatment of cataplexy and/or EDS in adults with narcolepsy in the U.S. market, as well as potential future competition from additional AG and generic versions of high-sodium oxybate, including a generic version of high-sodium oxybate from Amneal approved in September 2025, and from other competitors; increased pricing pressure from, changes in policies by, or restrictions on reimbursement imposed by, third party payors, including our ability to maintain adequate coverage and reimbursement for Xywav; increased rebates required to maintain access to our products; challenges to our intellectual property around Xyrem and/or Xywav, including from pending antitrust and intellectual property litigation; and continued acceptance of Xywav by physicians and patients. In addition, a wholly owned subsidiary of Hikma launched its AG version of high-sodium oxybate in January 2023 and Amneal launched its AG version of high-sodium oxybate in July 2023. For a discussion of risks associated with maintaining the AG royalty revenue from these AG products, see the risk factor below titled “The introduction of new products in the U.S. market that compete with, or otherwise disrupt the market for, our oxybate products has adversely affected and may continue to adversely affect sales of our oxybate products.” We have seen a negative impact and expect to see a further negative impact on our oxybate revenues as a result of these AG products and Avadel’s Lumryz and any generic products and new branded products that may compete with our oxybate products. A substantial decline in oxybate revenues could cause us to reduce our operating expenses or seek to raise additional funds and would have a material adverse effect on our business, financial condition, results of operations and growth prospects, including on our ability to acquire, in-license or develop new products to grow our business.

The introduction of new products in the U.S. market that compete with, or otherwise disrupt the market for, our oxybate products has adversely affected and may continue to adversely affect sales of our oxybate products.

New treatment options for cataplexy and EDS in narcolepsy have been commercially launched and, in the future, other products may be launched that are competitive with or disrupt the market for our oxybate products, Xywav and Xyrem.

Ten companies have sent us notices that they had filed ANDAs seeking approval to market a generic version of Xyrem. We filed patent lawsuits against all ten companies and have settled with all ten of the companies. To date, FDA has approved or tentatively approved four of these ANDAs, and we believe that it is likely that FDA will approve or tentatively approve some or all of the others. Pursuant to our patent litigation settlement with the first filer, Hikma launched its AG version of high-sodium oxybate in the U.S. beginning on January 1, 2023. Accordingly, beginning in January 2023, Xywav and Xyrem face competition from an AG version of high-sodium oxybate. We also granted Hikma a license to launch its own generic high-sodium oxybate product but, if it elects to launch its own generic product, Hikma will no longer have the right to sell the Hikma AG product. In our settlements with Amneal, Lupin, and Par, we granted each party the right to sell a limited volume of an AG product in the U.S. beginning on July 1, 2023 and ending on December 31, 2025, with royalties to be paid to us. Amneal

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launched its AG version of high-sodium oxybate in July 2023. At this time, Amneal has rights to sell a low-single-digit percentage of historical Xyrem sales over each 6-month sales period. At this time, Lupin and Par have elected not to launch an AG product. AG products are distributed through the same REMS as Xywav and Xyrem. We also granted each of Amneal, Lupin and Par a license to launch its own generic high-sodium oxybate product under its ANDA on or after December 31, 2025, or earlier under certain circumstances, including the circumstance where Hikma elects to launch its own generic product. In September 2025, Amneal received FDA approval for a generic version of high-sodium oxybate. If Amneal, Lupin or Par elects to launch its own generic product under such circumstance, it will no longer have the right to sell an AG product. In our settlements with each of six other ANDA filers, we granted each a license to launch its own generic high-sodium oxybate product under its ANDA on or after December 31, 2025, or earlier under certain circumstances, including circumstances where Hikma launches its own generic high-sodium oxybate product. It is possible that additional companies may file ANDAs seeking to market a generic version of Xyrem which could lead to additional patent litigation or challenges with respect to Xyrem and/or additional competition for our oxybate products.

Any ANDA holder launching an AG product or another generic high-sodium oxybate product will independently establish the price of the AG product and/or its own generic high-sodium oxybate product and determine the types of discounts or rebates they will offer parties that purchase or pay for the product. Generic competition often results in decreases in the net prices at which branded products can be sold. A component of drug pricing is the manufacturer’s list price for a drug to wholesalers or direct purchasers in the U.S. (without discounts, rebates or other reductions) referred to as the WAC. In this regard, Hikma and Amneal launched their AG products in 2023 at a WAC that was less than 15% lower than the WAC for Xyrem. After any introduction of a generic product, whether or not it is an AG product, a significant percentage of the prescriptions written for Xyrem have been, and will likely continue to be, filled with the generic product. Certain U.S. state laws allow for, and in some instances in the absence of specific instructions from the prescribing physician mandate, the dispensing of generic products rather than branded products when a generic version is available. This has resulted in reduced sales of, and revenue from, Xyrem. We continue to receive royalties and other revenue based on sales of AG products in accordance with the terms of our settlement agreements.

Other companies may develop sodium oxybate products for the treatment of narcolepsy, using an alternative formulation or a different delivery technology, and seek approval in the U.S. using an NDA approval pathway under Section 505(b)(2) and referencing the safety and efficacy data for Xyrem. For example, we face competition from branded products for treatment of cataplexy and/or EDS in narcolepsy, such as Avadel’s Lumryz. On May 1, 2023, Avadel announced that it had received FDA approval and ODE through May 1, 2030 for Lumryz, a fixed-dose, high-sodium oxybate which uses its proprietary technology for the treatment of EDS and cataplexy in patients with narcolepsy. Xyrem and Xywav also face increased competition from other branded entrants to treat EDS in narcolepsy such as Wakix and Sunosi. Other companies have announced that they have product candidates in various phases of development to treat the symptoms of narcolepsy, such as Axsome’s reboxetine, and various companies are performing research and development on orexin agonists for the treatment of sleep disorders, including Takeda Pharmaceutical Company Limited and Alkermes plc.

We expect that Xywav for the treatment of both cataplexy and EDS in patients with narcolepsy will continue to face competition from generic or AG high-sodium oxybate products or branded entrants in narcolepsy, such as Avadel’s Lumryz, notwithstanding FDA recognizing ODE for Xywav. For example, we received notices in June 2021 and February 2023, that Lupin and Teva, respectively, filed ANDAs for generic versions of Xywav. On October 13, 2023, Lupin announced that it has received tentative approval for its application to market a generic version of Xywav. In addition, in July 2025, we received notice from Granules that it has filed with FDA an ANDA for a generic version of Xywav. We have filed patent infringement suits against these ANDA filers. For additional information see “Xywav Patent Litigation” in Note 10, Commitments and Contingencies—Legal Proceedings of the Notes to Consolidated Financial Statements, included in Part I of this Quarterly Report on Form 10‑Q. Additional companies may file ANDAs seeking to market a generic version of Xywav which could lead to additional patent litigation or challenges with respect to Xywav and/or additional competition.

Moreover, generic or AG high-sodium oxybate products or branded high-sodium oxybate entrants in narcolepsy, such as Avadel’s Lumryz, as well as non-oxybate products intended for the treatment of EDS or cataplexy in narcolepsy or IH including new market entrants, even if not directly competitive with Xywav or Xyrem, have had and may continue to have the effect of changing treatment regimens and payor or formulary coverage of Xywav or Xyrem in favor of other products, and indirectly adversely affect sales of Xywav and Xyrem. Examples of such new market entrants of non-oxybate products include Wakix (pitolisant), a drug that was approved by FDA in 2019 for the treatment of EDS in adult patients with narcolepsy and approved by FDA in 2020 for an adult cataplexy indication in the U.S. Wakix has also been approved and marketed in Europe to treat adult patients with narcolepsy, with or without cataplexy, and to treat EDS in obstructive sleep apnea. Harmony Biosciences has announced a phase 3 study for pitolisant for IH after receiving a refusal to file from FDA in February 2025. In addition, we are also aware that prescribers often prescribe branded or generic medications for cataplexy and IH, before or instead of prescribing oxybate therapy including Xywav and Xyrem, and that payors often require patients to try such medications before they will cover Xywav or Xyrem, even if they are not approved for this use. Examples of such products are

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described in “Business—Competition” in Part I, Item 1 of our Annual Report on Form 10‑K for the year ended December 31, 2024.

We expect that the approval and launch of AG products or other generic versions of Xyrem or Xywav and the approval and launch of any other sodium oxybate product, such as Avadel’s Lumryz, or alternative product that treats narcolepsy will continue to have a negative impact on, and could have a material adverse effect on, our sales of Xywav and Xyrem and on our business, financial condition, results of operations and growth prospects.

Recent executive and judicial changes and flux in the regulatory landscape creates uncertainty for us and our industry.

The current administration is pursuing policies to reduce regulations and expenditures across government including at HHS, FDA, CMS and related agencies. These actions, primarily directed by executive orders or memoranda from the Office of Management and Budget, may propose policy changes that create additional uncertainty for our business. For example, on September 30, 2025, the current administration announced the first agreement with a major pharmaceutical company that requires the drug manufacturer to offer, through a direct to consumer platform, U.S. patients and Medicaid programs prescription drug Most-Favored Nation pricing equal to or lower than those paid in other developed nations, with additional mandates for direct-to-patient discounts and repatriation of foreign revenues. Other recent actions have included directives and actions to reduce agency workforce, program cuts, rescinding a Biden administration executive order tasking the Center for Medicare & Medicaid Innovation to consider new payment and healthcare models to limit drug spending, eliminating the Biden administration’s executive order that directed HHS to establish an AI task force and develop a strategic plan and directing certain federal agencies to enforce existing law regarding hospital and price plan transparency and by standardizing prices across hospitals and health plans and, as part of the Make America Healthy Again (also referred to as MAHA) Commission’s recent Strategy Report, working across government agencies to increase enforcement on direct-to-consumer pharmaceutical advertising. These actions and policies may significantly reduce U.S. drug prices, potentially impacting manufacturers’ global pricing strategies and profitability, while increasing their operational costs and compliance risks. Additionally, in its June 2024 decision in Loper Bright, the U.S. Supreme Court overturned the longstanding Chevron doctrine, under which courts were required to give deference to regulatory agencies’ reasonable interpretations of ambiguous federal statutes. The Loper Bright decision could result in additional legal challenges to current regulations and guidance issued by federal agencies applicable to our operations, including those issued by FDA. Finally, Congress may introduce and ultimately pass health care related legislation that could impact the drug approval process and make changes to the Medicare Drug Price Negotiation Program created under the IRA. We cannot predict which additional measures may be adopted or the impact of current and additional measures on the marketing, pricing and demand for our products, which could have a material adverse effect on our business, financial condition and results of operations.

The pricing of pharmaceutical products has come under increasing scrutiny as part of a global trend toward healthcare cost containment and resulting changes in healthcare law and policy, including changes to Medicare, may impact our business in ways that we cannot currently predict, which could have a material adverse effect on our business and financial condition.

Political, economic and regulatory influences are subjecting the healthcare industry in the U.S. to fundamental changes, particularly given the current atmosphere of mounting criticism of prescription drug costs in the U.S. We expect there will continue to be legislative and regulatory proposals to change the healthcare system in ways that could impact our ability to sell our products profitably, as governmental oversight and scrutiny of biopharmaceutical companies is increasing. For example, we anticipate that the U.S. Congress, state legislatures, and federal and state regulators may adopt or accelerate adoption of new healthcare policies and reforms intended to curb healthcare costs, such as federal and state controls on reimbursement for drugs (including under Medicare, Medicaid and commercial health plans), new or increased requirements to pay prescription drug rebates and penalties to government health care programs, and additional pharmaceutical cost transparency policies that aim to require drug companies to justify their prices through required disclosures. In addition, policymakers and federal agencies, including the Centers for Medicare & Medicaid Innovation, have signaled interest in testing or advancing new drug pricing models—such as so-called “most favored nation” or international reference pricing approaches—that would tie U.S. reimbursement levels to prices in foreign markets. Any such initiatives, if implemented, could reduce reimbursement for certain products, exert downward pricing pressure, and adversely affect our revenues and profitability. This includes efforts by individual states in the U.S. to pass legislation and implement regulations designed to control pharmaceutical and biological product pricing, including by establishing Prescription Drug Affordability Boards (or similar entities) to review high-cost drugs and, in some cases, set upper payment limits and implementing marketing cost disclosure and transparency measures. Further, the IRA, among other things, requires the U.S. Department of Health and Human Services Secretary to negotiate, with respect to Medicare units and subject to a specified cap, the price of a set number of certain high Medicare spend drugs and biologicals per year starting in 2026, penalizes manufacturers of certain Medicare Parts B and D drugs for price increases above inflation, and makes several changes to the Medicare Part D benefit, including a limit on annual out-of-pocket costs and a change in manufacturer liability under the program, which could negatively affect our business and financial condition. CMS has issued final guidance implementing the Drug Price Negotiation Program in which it finalized certain policies governing the selection

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of drugs for negotiation. Among other things, CMS finalized definitions of “qualifying single source drug” and “marketed” that, especially if they persist, could further disincentivize innovation. In addition, under the Medicaid Drug Rebate Program, rebates owed by manufacturers are no longer subject to a cap on the rebate amount effective January 1, 2024, which may adversely affect our rebate liability. The foregoing may negatively impact our overall rebate and discount liability, which would have a negative adverse effect on our revenues.

On July 4, 2025, President Trump signed into law H.R.1, a budget bill, which includes significant reforms to Medicaid, Medicare, and Affordable Care Act premium tax credits. Among other things, these reforms are anticipated to significantly decrease Medicaid spending, which could reduce access to and reimbursement for our products, which could have a negative adverse effect on our revenues.

Legislative and regulatory proposals that have recently been considered include, among other things, proposals to limit the terms of patent litigation settlements with generic sponsors, to define certain conduct around patenting and new product development as unfair competition, to address the scope of orphan drug exclusivity and to facilitate the importation of drugs into the U.S. from other countries. Moreover, on April 15, 2025, the White House issued an executive order announcing a number of initiatives seeking to lower drug pricing. In addition, there has been recent interest in incorporating so-called Most Favored Nation pricing into the U.S. healthcare system, under which prices for drugs in the United States could be tied to foreign reference prices through a mechanism that is not yet defined, announced in a second executive order dated May 12, 2025. Legislative and regulatory proposals to reform the regulation of the pharmaceutical industry and reimbursement for pharmaceutical drugs are continually changing, and all such considerations may adversely affect our business and industry in ways that we cannot accurately predict.

There is also ongoing activity related to health care coverage. The Affordable Care Act substantially changed the way healthcare is financed by both governmental and private insurers. These changes impacted previously existing government healthcare programs and have resulted in the development of new programs, including Medicare payment-for-performance initiatives. Further, federal and state policy makers have taken and may continue to try to take steps regarding health care coverage beyond the Affordable Care Act, which could have ramifications for the pharmaceutical industry. Additional legislative changes, regulatory changes, or guidance could be adopted, which may impact the marketing approvals and reimbursement for our products and product candidates. For example, there has been increasing legislative, regulatory, and enforcement interest in the U.S. with respect to drug pricing practices. There have been several Congressional inquiries and proposed and enacted federal and state legislation and regulatory initiatives designed to, among other things, bring more transparency to product pricing, evaluate the relationship between pricing and manufacturer patient programs, and reform government healthcare program reimbursement methodologies for drug products beyond the changes enacted by the IRA.

If new healthcare policies or reforms intended to curb healthcare costs are adopted or if we experience negative publicity with respect to pricing of our products or the pricing of pharmaceutical drugs generally, the prices that we charge for our products may be affected, our commercial opportunity may be limited and/or our revenues from sales of our products may be negatively impacted. We have periodically increased the price of our products, including Xywav and Xyrem most recently in January 2025, and there is no guarantee that we will not make similar price adjustments to our products in the future or that price adjustments we have taken or may take in the future will not negatively affect our sales volumes and revenues. There is no guarantee that such price adjustments will not negatively affect our reputation and our ability to secure and maintain reimbursement coverage for our products, which could limit the prices that we charge for our products, limit the commercial opportunities for our products and/or negatively impact revenues from sales of our products.

Government investigations or U.S. Congressional oversight with respect to drug pricing or our other business practices could cause us to incur significant expense and could distract us from the operation of our business and execution of our strategy. Any such investigation or hearing could also result in reduced market acceptance and demand for our products, could harm our reputation and our ability to market our products in the future, and could have a material adverse effect on our business, financial condition, results of operations and growth prospects. For more information, see the risk factor under the heading “We are subject to significant ongoing regulatory obligations and oversight, which may subject us to civil or criminal proceedings, investigations, or penalties and may result in significant additional expense and limit our ability to commercialize our products” in Part I, Item 1A of our Annual Report on Form 10-K for year ended December 31, 2024.

We expect that legislators, policymakers and healthcare insurance funds in Europe and other international markets will continue to propose and implement cost-containing measures to keep healthcare costs down. These measures could include limitations on the prices we will be able to charge for our products or the level of reimbursement available for these products from governmental authorities or third party payors as well as clawbacks and revenue caps. For example, in the U.K., the cap on NHS spending on branded medicines agreed between the U.K. government and industry for 2019 to 2023 has remained unaltered despite higher than expected growth in NHS use of branded medicines, resulting in significant increases to the industry level revenue clawback rate payable on sales of branded medicines to the NHS. In the EU, a trend in some EU member states is for reimbursement price of medicinal products to be assessed against the relative price and cost of treatment of existing standard of care and competitor products, which may hinder the inclusion of newer innovative products in

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reimbursement lists. On April 26, 2023, the EC adopted proposals for a new Directive and a new Regulation, which revise and replace the existing EU general pharmaceutical legislation. This proposal includes increased transparency on research and development costs or public contributions to these costs with a view to strengthen the negotiating position of national competent authorities of the EU member states responsible for pricing and reimbursement, as well as reinforced cooperation with these authorities on pricing and reimbursement matters. The European Parliament and the Council of the European Union are currently engaged in interinstitutional negotiations to agree on the final version of the pharmaceutical legislation. Further, an increasing number of European and other foreign countries use prices for medicinal products established in other countries as “reference prices” to help determine the price of the product in their own territory. Consequently, a downward trend in prices of medicinal products in some countries could contribute to similar downward trends elsewhere.

Global trade issues and changes in and uncertainties with respect to trade policies and export regulations, including import and export license requirements, trade sanctions, tariffs and international trade disputes, could increase our costs, reduce the competitiveness of our products and otherwise have a material adverse effect on our business, financial condition, results of operations and growth prospects.

There is inherent risk, based on the complex relationships among the U.S. and the countries in which we conduct our business, that political, diplomatic, and national security factors can lead to global trade restrictions and changes in trade policies and export regulations that may adversely affect our business and operations. Compliance with applicable regulatory requirements regarding the export of our products may create delays in the introduction of our products in international markets or, in some cases, prevent the export of our products to some countries altogether. Furthermore, U.S. export control laws and economic sanctions prohibit the provision of certain products and services to countries, governments and persons targeted by U.S. sanctions. The U.S. and other countries have imposed and may continue to impose new trade restrictions and export regulations, have levied tariffs and taxes on certain goods, and could continue to significantly increase tariffs on a broad array of goods, including pharmaceutical and biological products.

While we are an Irish company headquartered in Dublin, Ireland, we derive the majority of our revenues from sales of our products in the U.S. We conduct business globally and our operations, including third-party suppliers, span numerous countries outside the U.S. In particular, we have a manufacturing and development facility in Athlone, Ireland where we manufacture Xywav and Xyrem, a manufacturing and development facility in Kent Science Park, U.K. where we produce Epidiolex/Epidyolex, and a manufacturing plant in Villa Guardia, Italy where we produce defibrotide drug substance. In addition, we rely on our supplier in China for the manufacture of Ziihera.

The ongoing trade tensions between the U.S. and other jurisdictions have resulted in multiple rounds of tariffs and anticipated tariffs affecting pharmaceuticals and pharmaceutical ingredients, including finished drug products, manufacturing equipment, and related supplies. Such tariffs may significantly increase our costs for certain products. The Bureau of Industry and Security, U.S. Department of Commerce, has initiated an investigation to determine whether pharmaceutical ingredients, including finished drug product, manufactured outside the United States pose a national security risk and should be subject to additional tariffs. Should current tariffs hold or additional tariffs be imposed specifically targeting pharmaceutical imports, such tariffs will result in additional costs on our business, including costs with respect to APIs and other raw materials upon which our business depends and will generally increase our manufacturing costs. In addition, such tariffs will increase our supply chain complexity and could also potentially disrupt our existing supply chain. Moreover, other governments have imposed and may continue to impose retaliatory tariffs, trade restrictions or trade barriers on our products, which may impose additional costs and complexity on our business. In addition, the dynamic and unpredictable tariff and trade landscape creates substantial uncertainty and significant planning challenges for our operations. Changes in tariff classifications, country-of-origin requirements, or customs procedures can occur with limited notice. This uncertainty complicates our long-term investment decisions regarding manufacturing facilities, supply chain optimization, and research and development locations.

While we cannot at this time predict the ultimate impact of such tariffs, we anticipate that that our margins could be adversely affected beginning as early as fiscal 2026, depending on the ultimate scope and duration of tariffs imposed. Additionally, it is possible that such tariffs could affect imports of APIs and other raw materials used in our products, or our business may be adversely impacted by retaliatory trade measures taken by other countries, including restricted access to APIs or other raw materials used in our products, further disrupting our supply chain and increasing our costs. Given the nature of our products, relocating the manufacturing supply in response to tariffs and other trade restrictions would be a complex, costly and time-consuming process making it difficult for us to react quickly to a rapidly changing environment. In this regard, it would take a significant amount of time and expense to implement and execute the necessary technology transfer to, and to qualify, new suppliers for our products. If there are delays in qualifying new suppliers or facilities or a new supplier is unable to meet FDA’s or similar international regulatory body’s requirements for approval, there could be a shortage of the affected products for the marketplace or for use in clinical studies, or both, which could negatively impact our anticipated revenues.

Further, the continued threats of new or increased tariffs, sanctions, trade restrictions and trade barriers as well as ongoing changes in U.S. and foreign government trade policies, including potential modifications to existing trade agreements, have had and may continue to have a generally disruptive impact on the global economy and, therefore, negatively impact revenues from

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sales of our products. Given the volatility and uncertainty regarding the scope and duration of such tariffs and other aspects of U.S. and foreign government trade policies, the ultimate impact on our operations and financial results is uncertain and could be significant. In any event, further trade restrictions and export regulations, or new or increased tariffs, including further retaliatory measures, could increase our supply chain complexity and our manufacturing costs, decrease our margins, reduce the competitiveness of our products, or restrict our ability to sell our products, provide services or purchase necessary equipment and supplies. Any of these factors could have a material adverse effect on our business, financial condition, results of operations and growth prospects.

We may not realize the anticipated benefits from our acquisition of Chimerix.

On April 21, 2025, we completed the acquisition of all the outstanding shares of Chimerix Common Stock. As a result of this, Chimerix became an indirect wholly owned subsidiary of the Company. The success of the acquisition will depend, in part, on our ability to realize the anticipated benefits from successfully combining our and Chimerix’s operations and we plan on devoting management attention and resources to integrating our business practices and operations with Chimerix’s so that we can fully realize the anticipated benefits of the acquisition. In addition, Modeyso, which we acquired in the acquisition, may not be successful or may require significantly greater resources and investments than originally anticipated. The transaction could also result in the assumption of unknown or contingent liabilities. In addition, difficulties may arise during the process of combining the operations of our companies that could result in the failure to achieve revenue that we anticipate, the loss of key employees that may be difficult to replace in the very competitive pharmaceutical field, the failure to harmonize both companies’ corporate cultures, the disruption of each company’s ongoing businesses or inconsistencies in standards, controls, procedures and policies that adversely affect our ability to maintain relationships with suppliers, collaboration partners, clinical trial investigators or managers of our clinical trials. As a result, the anticipated benefits of the acquisition may not be realized fully within the expected timeframe or at all or may take longer to realize or cost more than expected, which could materially and adversely affect our business, financial condition, results of operations and growth prospects.

We may not be able to successfully identify and acquire or in-license additional products or product candidates to grow our business, and, even if we are able to do so, we may otherwise fail to realize the anticipated benefits of these transactions.

In addition to continued investment in our research and development pipeline, we intend to grow our business by acquiring or in-licensing, and developing, including with collaboration partners, additional products and product candidates that we believe are highly differentiated and have significant commercial potential. However, we may be unable to identify or consummate suitable acquisition or in-licensing opportunities, and this inability could impair our ability to grow our business. Other companies, many of which may have substantially greater financial, sales and marketing resources, compete with us for these opportunities. Even if appropriate opportunities are available, we may not be able to successfully identify them, or we may not have the financial resources necessary to pursue them.

Even if we are able to successfully identify and acquire, in-license or develop additional products or product candidates, we may not be able to successfully manage the risks associated with integrating any products or product candidates into our portfolio or the risks arising from anticipated and unanticipated problems in connection with an acquisition or in-licensing or from financial difficulties of our collaborators. Further, while we seek to mitigate risks and liabilities of potential acquisitions and in-licensing transactions through, among other things, due diligence, there may be risks and liabilities that such due diligence efforts fail to discover, that are not disclosed to us, or that we inadequately assess. Any failure in identifying and managing these risks, liabilities and uncertainties effectively, could have a material adverse effect on our business, results of operations and financial condition. In addition, product and product candidate acquisitions, particularly when the acquisition takes the form of a merger or other business consolidation, such as our acquisition of GW have required, and any similar future transactions also will require, significant efforts and expenditures, including with respect to transition and integration activities. We may encounter unexpected difficulties, or incur substantial costs, in connection with potential acquisitions and similar transactions, which include:

•the need to incur substantial debt and/or engage in dilutive issuances of equity securities to pay for acquisitions;

•the need to comply with regulatory requirements, including in some cases clearance from the FTC;

•the potential need to secure shareholder approval of the transaction;

•the potential disruption of our historical core business;

•the strain on, and need to continue to expand, our existing operational, technical, financial and administrative infrastructure;

•the difficulties in integrating acquired products and product candidates into our portfolio;

•the difficulties in assimilating employees and corporate cultures;

•the failure to retain key managers and other personnel;

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•the need to write down assets or recognize impairment charges;

•the diversion of our management’s attention to integration of operations and corporate and administrative infrastructures; and

•any unanticipated liabilities for activities of or related to the acquired business or its operations, products or product candidates.

As a result of these or other factors, products or product candidates we acquire, or obtain licenses to, may not produce the revenues, earnings or business synergies that we anticipated, may not result in regulatory approvals, and may not perform as expected. For example, in May 2021, we made a substantial investment in Epidiolex and certain other products and technologies acquired in our acquisition of GW. The total consideration paid by us for the entire issued share capital of GW was $7.2 billion. Additionally, in April 2025, we completed our acquisition of Chimerix, a biopharmaceutical company the lead asset of which was Modeyso, a novel first-in-class small molecule treatment of adult and pediatric patients 1 year of age and older for H3 K27M-mutant diffuse glioma, a rare, high-grade brain tumor that most commonly affects children and young adults. The total consideration paid by us for the outstanding shares of Chimerix Common Stock was $944.2 million. The success of our acquisition of GW and Chimerix will depend, in part, on our ability to realize the anticipated benefits from each of the acquisitions, which benefits may not be realized at the expected levels within the expected timeframe, or at all, or may take longer to realize or cost more than expected, which could materially and adversely affect our business, financial condition, results of operations and growth prospects. In this regard, in the third quarter of 2022, we recorded a $133.6 million asset impairment charge as a result of the decision to discontinue the nabiximols program that we acquired as part of our acquisition of GW. In any event, failure to manage effectively our growth through acquisitions or in-licensing transactions could adversely affect our growth prospects, business, results of operations and financial condition.

It is difficult and costly to protect our proprietary rights, and we may not be able to ensure their protection.

Our commercial success depends in part on obtaining, maintaining and defending intellectual property protection for our products and product candidates, including protection of their use and methods of manufacturing. Our ability to protect our products and product candidates from unauthorized making, using, selling, offering to sell or importation by third parties depends on the extent to which we have rights under valid and enforceable patents or have adequately protected trade secrets that cover these activities.

The degree of protection to be afforded by our proprietary rights is difficult to predict because legal means afford only limited protection and may not adequately protect our rights or permit us to gain or keep our competitive advantage. For example:

•our patent applications, or those of our licensors or partners, may not result in issued patents;

•others may independently develop similar or therapeutically equivalent products without infringing our patents, or those of our licensors, such as products that are not covered by the claims of our patents, or for which fall outside the exclusive rights granted under our license agreements;

•our issued patents, or those of our licensors or partners, may be held invalid or unenforceable as a result of legal challenges by third parties or may be vulnerable to legal challenges as a result of changes in applicable law;

•our patents covering certain aspects of our products or the use thereof could be delisted from FDA's Orange Book as a result of challenges by third parties before FDA or the courts;

•competitors may manufacture products in countries where we have not applied for patent protection or that have a different scope of patent protection or that do not respect our patents; or

•others may be issued patents that prevent the sale of our products or require licensing and the payment of significant fees or royalties.

Patent enforcement generally must be sought on a country-by-country basis, and patent validity and infringement may be judged differently in different countries. The legal systems of certain countries, particularly certain developing countries, may lack maturity or consistency when it comes to the enforcement of patents and other intellectual property rights, particularly those relating to pharmaceuticals, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business.

Changes in either the patent laws or in interpretations of patent laws in the U.S. and other countries may diminish the value of our intellectual property portfolio. Any patent may be challenged, and potentially invalidated or held unenforceable, including through patent litigation or through administrative procedures that permit challenges to patent validity. Patents can also be designed around by an ANDA or Section 505(b)(2) NDA that avoids infringement of our intellectual property.

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In June 2021, we received notice from Lupin that it has filed with FDA an ANDA for a generic version of Xywav. The notice from Lupin included a “paragraph IV certification” with respect to ten of our patents listed in FDA’s Orange Book for Xywav on the date of our receipt of the notice. A paragraph IV certification is a certification by a generic applicant that patents covering the branded product are invalid, unenforceable, and/or will not be infringed by the manufacture, use or sale of the generic product. In April 2022, we received notice from Lupin that it had filed a paragraph IV certification regarding a newly-issued patent listed in the Orange Book for Xywav. In February 2023, we received notice from Teva that it had filed an ANDA seeking approval to market a generic version of Xywav, which notice included a paragraph IV certification with respect to certain of our patents listed in FDA’s Orange Book for Xywav. For additional information on litigation involving these matters, see Note 10, Commitments and Contingencies—Legal Proceedings of the Notes to Consolidated Financial Statements, included in Part I of this Quarterly Report on Form 10-Q.

We have settled patent litigation with each of the ten companies seeking to introduce generic versions of Xyrem in the U.S. by granting those companies licenses to launch their generic products (and in certain cases, an AG version of Xyrem) in advance of the expiration of the last of our patents. Notwithstanding our Xyrem patents and settlement agreements, additional third parties may also attempt to introduce generic versions of Xyrem, Xywav or other sodium oxybate products for treatment of cataplexy and/or EDS in narcolepsy that design around our patents or assert that our patents are invalid or otherwise unenforceable. Such third parties could launch a generic or 505(b)(2) product referencing Xyrem before the dates provided in our patents or settlement agreements. For example, we have several methods of use patents listed in the Orange Book, that expire in 2033 that cover treatment methods included in the Xyrem label related to a DDI with divalproex sodium. Although FDA has stated, in granting a Citizen Petition we submitted in 2016, that it would not approve any sodium oxybate ANDA referencing Xyrem that does not include the portions of the currently approved Xyrem label related to the DDI patents, we cannot predict whether a future ANDA filer, or a company that files a Section 505(b)(2) application for a drug referencing Xyrem, may pursue regulatory strategies to avoid infringing our DDI patents notwithstanding FDA’s response to the Citizen Petition, or whether any such strategy would be successful. Likewise, we cannot predict whether we will be able to maintain the validity of these patents or will otherwise obtain a judicial determination that a generic or other sodium oxybate product, its package insert or the generic sodium oxybate REMS or another separate REMS will infringe any of our patents or, if we prevail in proving infringement, whether a court will grant an injunction that prevents a future ANDA filer or other company introducing a different sodium oxybate product from marketing its product, or instead require that party to pay damages in the form of lost profits or a reasonable royalty.

Since Xyrem’s regulatory exclusivity has expired in the EU, we are aware that generic or hybrid generic applications have been approved by various EU regulatory authorities, and additional generic or hybrid generic applications may be submitted and approved.

We have settled patent litigation with each of the ten companies seeking to market a generic version of Epidiolex in the U.S. by granting each of the Epidiolex ANDA Filers a license to manufacture, market, and sell its own generic version of Epidiolex beginning in the very late 2030s, or earlier under certain circumstances, including but not limited to the launch of another generic Epidiolex product or a final decision that all unexpired claims of the Epidiolex patents are not infringed, or are invalid and/or unenforceable. Notwithstanding our patents listed in FDA’s Orange Book for Epidiolex and settlement agreements, additional third parties may also attempt to introduce generic versions of Epidiolex that design around our patents or assert that our patents are invalid or otherwise unenforceable.

In March 2025, we received a notice from Almaject that it had filed with FDA an ANDA for a generic version of Defitelio (defibrotide sodium). The notice from Almaject included a paragraph IV certification respect to certain of our patents listed in FDA’s Orange Book for Defitelio on the date of the notice. The listed patents relate generally to the Defitelio drug product and its approved use. For additional information on litigation involving this matter, see Note 10, Commitments and Contingencies—Legal Proceedings of the Notes to Consolidated Financial Statements, included in Part I of this Quarterly Report on Form 10-Q.

We have entered into a settlement agreement with Avadel involving, among other matters, our patent infringement suit against Avadel and several of its corporate affiliates in the United States District Court for the District of Delaware. For additional information on litigation involving this matter, see “Avadel Litigation” in Note 10, Commitments and Contingencies—Legal Proceedings of the Notes to Consolidated Financial Statements, included in Part I of this Quarterly Report on Form 10‑Q.

In July and August 2024, Zepzelca ANDA filers sent us notices that they had filed ANDAs seeking approval to market a generic version of Zepzelca (lurbinectedin), which notices each included a paragraph IV certification with respect to our Orange Book listed patent for Zepzelca on the date of the receipt of the applicable notice. In September 2024, we filed patent infringement suits against these ANDA filers. For additional information on litigation involving this matter, see “Zepzelca Patent Litigation” in Note 10, Commitments and Contingencies—Legal Proceedings of the Notes to Consolidated Financial Statements, included in Part I of this Quarterly Report on Form 10‑Q.

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We also currently rely in part on trade secret protection for several of our products, including Defitelio, and product candidates. Trade secret protection does not protect information or inventions if another party develops that information or invention independently and establishing that a competitor developed a product through trade secret misappropriation rather than through legitimate means may be difficult to prove. We seek to protect our trade secrets and other unpatented proprietary information in part through confidentiality and invention agreements with our employees, consultants, advisors and partners. Nevertheless, our employees, consultants, advisors and partners may unintentionally or willfully disclose our proprietary information to competitors, and we may not have adequate remedies for such disclosures. Moreover, if a dispute arises with our employees, consultants, advisors or partners over the ownership of rights to inventions, including jointly developed intellectual property, we could lose patent protection or the confidentiality of our proprietary information, and possibly also lose the ability to pursue the development of certain new products or product candidates.

Disruptions at FDA, the SEC and other government agencies and regulatory authorities including due to a reduction in such agencies’ workforces, inadequate funding or the current and potential future government shutdowns, could prevent those agencies from performing normal functions on which our business relies, which could negatively impact our business.

The ability of FDA to review and approve new products or review other regulatory submissions can be affected by a variety of factors, including statutory, regulatory and policy changes, inadequate government budget and funding levels, government shutdowns, a reduction in FDA’s workforce and its ability to hire and retain key personnel. Disruptions at FDA and other agencies may also increase the time to meet with and receive agency feedback, review and/or approve our submissions, conduct inspections, issue regulatory guidance, or take other actions that facilitate the development, approval and marketing of regulated products, which would adversely affect our business. In addition, government proposals to reduce or eliminate budgetary deficits may include reduced allocations to FDA, the SEC and other government agencies and regulatory authorities on which our operations may rely. For example, in October 2025, the U.S. government shut down and certain regulatory agencies, including FDA, had to furlough critical employees and stop critical activities. If the current government shutdown is prolonged, or a prolonged government shutdown occurs in the future, it could significantly impact the ability of FDA to review and process our regulatory submissions, which could have a material adverse effect on our business. It is unclear how these executive actions or other potential actions by the Trump Administration or other parts of the federal government will impact FDA, the SEC or other regulatory authorities that oversee our business. The reductions in FDA’s workforce and budgetary pressures could significantly impact the ability of FDA to timely review and process our regulatory submissions or take other actions critical to the marketing of our products which could have a material adverse effect on our business.

Changes to tax laws relating to multinational corporations could adversely affect us.

The U.S. Congress, the EU, the OECD, and other government agencies in jurisdictions where we and our affiliates do business have had an extended focus on issues related to the taxation of multinational corporations. As a result of the focus on the taxation of multinational corporations, the tax laws in Ireland, the U.S. and other countries in which we and our affiliates do business could change on a prospective or retroactive basis, and any such changes could adversely affect us.

One example is the OECD’s initiative in the area of “base erosion and profit shifting,” including the 15% global minimum tax under Pillar Two. In December 2022, the EU agreed to implement this global minimum tax rate for EU member states by the start of 2024. In accordance with the EU directive, Ireland adopted legislation implementing Pillar Two on December 18, 2023, with effect from the start of 2024. Other jurisdictions in which we do business have also adopted legislation implementing certain key aspects of Pillar Two. Pillar Two legislation could have an adverse impact on our effective tax rate, tax liabilities, and cash tax and may increase our compliance costs.

Further, the IRA, among other things, introduced new tax provisions, including a 15% corporate alternative minimum tax for certain large corporations, and a 1% excise tax on certain share repurchases by publicly traded corporations, including certain repurchases by specified domestic affiliates of publicly traded foreign corporations. These provisions became effective in 2023. The IRS has issued limited guidance on the corporate alternative minimum tax, the excise tax and the other tax provisions in the IRA, and much of this guidance has yet to be finalized. Final guidance under the IRA could adversely affect our tax provision, cash tax liability and effective tax rate.

The U.S. and other jurisdictions in which we operate continue to consider other changes in tax laws and regulations that apply to multinationals, including proposed legislation and guidance with respect to research and development expenditures and other guidance under the 2017 Tax Cuts and Jobs Act. On July 4, 2025, the U.S. adopted legislation that extended certain provisions of the 2017 Tax Cuts and Jobs Act, which would otherwise have expired on December 31, 2025, and introduced a number of other changes to U.S. tax laws, including immediate expensing of domestic research and experimentation expenditures. The new legislation also introduced certain amendments to the foreign-derived intangible income provisions, with effect as of 2026. We are still evaluating the effect of the new legislation on our tax provision, cash tax liability and effective tax rate.

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Item 2.Unregistered Sales of Equity Securities, Use of Proceeds, and Issuer Purchases of Equity Securities

Issuer Purchases of Equity Securities

On July 31, 2024, we announced that our board of directors had authorized the New Repurchase Program pursuant to which our board of directors authorized us to repurchase our ordinary shares for up to an aggregate purchase price of $500.0 million, exclusive of any brokerage commissions. Under the New Repurchase Program, which has no expiration date, we may repurchase our ordinary shares from time to time by any methods and/or structures permitted by applicable law. During the three months ended September 30, 2025, we did not repurchase any of our ordinary shares. As of September 30, 2025, the remaining amount authorized under the New Repurchase Program was $225.0 million.

The timing and amount of repurchases will depend on a variety of factors, including the price of our ordinary shares, alternative investment opportunities, restrictions under our outstanding credit agreement and the indenture for our Secured Notes, corporate and regulatory requirements, and market conditions. The New Repurchase Program may be modified, suspended or discontinued at any time without our prior notice.

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Item 6.Exhibits

Exhibit Number			Description of Document
2.1+			Transaction Agreement, dated as of February 3, 2021, by and among Jazz Pharmaceuticals UK Holdings Limited, Jazz Pharmaceuticals Public Limited Company and GW Pharmaceuticals PLC (incorporated herein by reference to Exhibit 2.1 in Jazz Pharmaceuticals plc’s Current Report on Form 8-K (File No. 001-33500), as filed with the SEC on February 4, 2021).
2.2+			Agreement and Plan of Merger, dated as of March 4, 2025, by and among Chimerix, Inc, Jazz Pharmaceuticals Public Limited Company, and Pinetree Acquisition Sub, Inc. (incorporated by reference to Exhibit 2.1 in Jazz Pharmaceuticals plc’s Current Report on Form 8-K (File No. 001-33500), as filed with the SEC on March 5, 2025).
3.1			Amended and Restated Memorandum and Articles of Association of Jazz Pharmaceuticals plc, as amended on August 4, 2016 (incorporated herein by reference to Exhibit 3.1 in Jazz Pharmaceuticals plc’s Quarterly Report on Form 10-Q (File No. 001-33500) for the period ended June 30, 2016, as filed with the SEC on August 9, 2016).
10.1#			Amended and Restated Non-Employee Director Compensation Policy (approved October 23, 2025).
31.1			Certification of Chief Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended.
31.2			Certification of Chief Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended.
32.1*			Certifications of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS			XBRL Instance Document - The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH			Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Document
104			Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

__________________

+    Certain portions of this exhibit have been omitted pursuant to Item 601(b)(2) of Regulation S-K.

#    Indicates management contract or compensatory plan.

*    The certification attached as Exhibit 32.1 accompanies this Quarterly Report on Form 10‑Q pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, and shall not be deemed “filed” by the Registrant for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: November 5, 2025

JAZZ PHARMACEUTICALS PUBLIC LIMITED COMPANY

(Registrant)

/s/ Renée Galá

Renée Galá

President and Chief Executive Officer and Director
(Principal Executive Officer)

/s/ Philip L. Johnson

Philip L. Johnson

Executive Vice President and Chief Financial Officer
(Principal Financial Officer)

/s/ Patricia Carr

Patricia Carr

Senior Vice President, Chief Accounting Officer
(Principal Accounting Officer)

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