[10-Q] Adaptimmune Therapeutics plc American Quarterly Earnings Report

Rhea-AI Filing Summary

Adaptimmune Therapeutics plc (ADAP) reported a six-month net loss of $77.9 million and used $101.4 million of cash in operating activities through June 30, 2025. Revenue for the six months was $20.96 million, down from $133.91 million in the prior-year period, reflecting lower development revenue. Cash and cash equivalents were $26.1 million at period end and total assets fell to $130.6 million from $246.0 million at year-end. The company carried an accumulated deficit of $1,171.9 million and negative stockholders' equity of $70.96 million.

After period end, Adaptimmune completed an asset sale of its TECELRA, letecel, afami-cel and uza-cel product assets to US WorldMeds for $55.0 million upfront, with up to $30.0 million in contingent milestone payments, and used part of the proceeds to repay all indebtedness to Hercules (payoff ~$29.1 million), terminating the loan. The company announced further workforce reductions of approximately 62% post-transaction and expects to incur $7–8 million of pre-tax severance and related costs. Management states cash will be sufficient to meet operating requirements for 12 months following this filing.

Positive

• Completed asset sale of TECELRA, letecel, afami-cel and uza-cel for $55.0 million upfront with up to $30.0 million in contingent milestone payments
• All indebtedness to Hercules repaid (approximate payoff $29.1 million) and the Loan Agreement was terminated upon closing
• Management indicates cash and resources are sufficient to meet operating requirements for the 12 months following this filing
• Deferred revenue and unsatisfied performance obligations provide future contracted revenue visibility: deferred revenue of $112.119 million and transaction price allocated to unsatisfied obligations of $121.309 million

Negative

• Large operating losses and cash burn: net loss of $77.9 million for six months and operating cash outflow of $101.4 million
• Significant year-over-year revenue decline: six-month revenue of $20.96 million vs $133.91 million prior-year period
• Balance sheet weakness: negative stockholders' equity of $70.96 million and accumulated deficit of $1,171.9 million
• Workforce reductions and restructuring costs: planned further headcount reduction of ~62% with expected pre-tax severance of $7–8 million

Insights

Financial Analyst

TL;DR: Asset sale provides immediate liquidity and eliminates loan obligations, materially improving near-term cash position but leaves the company with significant deficit.

The July 31, 2025 asset sale generated $55.0 million upfront and up to $30.0 million in milestones, and the proceeds were used to repay Hercules (approximate payoff of $29.1 million) and terminate the loan facility. Prior to the transaction the company had $26.1 million cash, negative equity of $70.96 million, and used $101.4 million in operating cash for the first half of 2025. The sale and subsequent announced workforce reductions are material actions that address immediate liquidity and covenant risks, while leaving the company focused on monetizing remaining early-stage assets.

M&A Specialist

TL;DR: The divestiture of key product assets and licensing/transition agreements materially reshape Adaptimmune's business and balance sheet.

The Asset Purchase Agreement transfers product assets and related IP to US WorldMeds, includes a license and transition services agreement, and removes product-related liabilities from Adaptimmune's balance sheet. The structure provides upfront cash ($55.0 million) plus contingent payments (up to $30.0 million) tied to regulatory and commercial milestones, and immediately satisfied indebtedness to Hercules. The M&A is consequential: it converts product assets into cash and contingent receipts and triggers a planned workforce reduction (~62%), fundamentally reducing operating scale and cost base.

0001621227--12-312025Q2false00-0000000http://fasb.org/us-gaap/2025#PrimeRateMemberhttp://fasb.org/us-gaap/2025#PrimeRateMemberhttp://fasb.org/us-gaap/2025#SellingGeneralAndAdministrativeExpense0001621227us-gaap:CommonStockMember2024-04-012024-06-300001621227us-gaap:RetainedEarningsMember2025-06-300001621227us-gaap:AdditionalPaidInCapitalMember2025-06-300001621227us-gaap:AccumulatedTranslationAdjustmentMember2025-06-300001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2025-06-300001621227us-gaap:RetainedEarningsMember2025-03-310001621227us-gaap:AdditionalPaidInCapitalMember2025-03-310001621227us-gaap:AccumulatedTranslationAdjustmentMember2025-03-310001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2025-03-310001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2025-03-3100016212272025-03-310001621227us-gaap:RetainedEarningsMember2024-12-310001621227us-gaap:AdditionalPaidInCapitalMember2024-12-310001621227us-gaap:AccumulatedTranslationAdjustmentMember2024-12-310001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-12-310001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-12-310001621227us-gaap:RetainedEarningsMember2024-06-300001621227us-gaap:AdditionalPaidInCapitalMember2024-06-300001621227us-gaap:AccumulatedTranslationAdjustmentMember2024-06-300001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-06-300001621227us-gaap:RetainedEarningsMember2024-03-310001621227us-gaap:AdditionalPaidInCapitalMember2024-03-310001621227us-gaap:AccumulatedTranslationAdjustmentMember2024-03-310001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-03-310001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-03-3100016212272024-03-310001621227us-gaap:RetainedEarningsMember2023-12-310001621227us-gaap:AdditionalPaidInCapitalMember2023-12-310001621227us-gaap:AccumulatedTranslationAdjustmentMember2023-12-310001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-12-310001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-12-310001621227adap:PoofOfConceptTrialMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-06-300001621227adap:MaterialRightForExclusiveOptionMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-06-300001621227adap:LtfuMember2025-06-300001621227adap:IgnyteMember2025-06-300001621227adap:GskTerminationAndTransferAgreementMember2025-06-300001621227adap:AchievementOfNetProductRevenueEqualToOrExceedingTwoHundredMillionMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMemberus-gaap:SubsequentEventMember2025-07-272025-07-270001621227adap:AchievementOfNetProductRevenueEqualToOrExceedingEighteenMillionMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMemberus-gaap:SubsequentEventMember2025-07-272025-07-270001621227adap:DevelopmentRevenueMember2025-04-012025-06-300001621227adap:DevelopmentRevenueMember2025-01-012025-06-300001621227adap:DevelopmentRevenueMember2024-04-012024-06-300001621227adap:DevelopmentRevenueMember2024-01-012024-06-300001621227us-gaap:OneTimeTerminationBenefitsMember2024-12-310001621227us-gaap:ContractTerminationMember2024-12-310001621227us-gaap:SubsequentEventMember2025-07-282025-07-2800016212272024-11-132024-11-130001621227srt:MinimumMemberus-gaap:SubsequentEventMember2025-07-280001621227srt:MaximumMemberus-gaap:SubsequentEventMember2025-07-280001621227us-gaap:OneTimeTerminationBenefitsMember2025-06-300001621227us-gaap:ContractTerminationMember2025-06-300001621227us-gaap:OneTimeTerminationBenefitsMember2025-01-012025-06-300001621227us-gaap:ContractTerminationMember2025-01-012025-06-300001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2025-04-012025-06-300001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2025-01-012025-03-310001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-04-012024-06-300001621227us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-01-012024-03-310001621227us-gaap:AccumulatedTranslationAdjustmentMember2025-04-012025-06-300001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2025-04-012025-06-300001621227us-gaap:AccumulatedTranslationAdjustmentMember2025-01-012025-03-310001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2025-01-012025-03-310001621227us-gaap:AccumulatedTranslationAdjustmentMember2024-04-012024-06-300001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-04-012024-06-300001621227us-gaap:AccumulatedTranslationAdjustmentMember2024-01-012024-03-310001621227us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-01-012024-03-310001621227us-gaap:RetainedEarningsMember2025-04-012025-06-300001621227us-gaap:RetainedEarningsMember2025-01-012025-03-310001621227us-gaap:RetainedEarningsMember2024-04-012024-06-300001621227us-gaap:RetainedEarningsMember2024-01-012024-03-310001621227adap:MDAndersonStrategicAllianceMember2025-01-012025-06-300001621227srt:MaximumMemberadap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:FairValueInputsLevel2Memberus-gaap:NotesPayableToBanksMember2025-06-300001621227adap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2025-01-012025-06-300001621227adap:LoanAndSecurityAgreementMember2025-07-270001621227adap:MarketableSecuritiesMember2024-12-310001621227adap:MarketableSecuritiesMemberus-gaap:CorporateDebtSecuritiesMember2024-12-310001621227srt:MaximumMemberadap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2024-05-142024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodTwoMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodThreeMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodFourMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodFiveMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodOneMemberus-gaap:NotesPayableToBanksMember2025-06-300001621227srt:MinimumMemberadap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2024-05-142024-05-140001621227adap:SupportFunctionsSegmentMember2025-04-012025-06-300001621227adap:ResearchSegmentMember2025-04-012025-06-300001621227adap:OtherSegmentMember2025-04-012025-06-300001621227adap:InfrastructureManagementAndFacilitiesSegmentMember2025-04-012025-06-300001621227adap:DevelopmentAndComplianceSegmentMember2025-04-012025-06-300001621227adap:CommercialPlanningSegmentMember2025-04-012025-06-300001621227adap:CmcAndQualitySegmentMember2025-04-012025-06-300001621227adap:BiomarkersSegmentMember2025-04-012025-06-300001621227adap:SupportFunctionsSegmentMember2025-01-012025-06-300001621227adap:ResearchSegmentMember2025-01-012025-06-300001621227adap:OtherSegmentMember2025-01-012025-06-300001621227adap:InfrastructureManagementAndFacilitiesSegmentMember2025-01-012025-06-300001621227adap:DevelopmentAndComplianceSegmentMember2025-01-012025-06-300001621227adap:CommercialPlanningSegmentMember2025-01-012025-06-300001621227adap:CmcAndQualitySegmentMember2025-01-012025-06-300001621227adap:BiomarkersSegmentMember2025-01-012025-06-300001621227adap:SupportFunctionsSegmentMember2024-04-012024-06-300001621227adap:ResearchSegmentMember2024-04-012024-06-300001621227adap:OtherSegmentMember2024-04-012024-06-300001621227adap:InfrastructureManagementAndFacilitiesSegmentMember2024-04-012024-06-300001621227adap:DevelopmentAndComplianceSegmentMember2024-04-012024-06-300001621227adap:CommercialPlanningSegmentMember2024-04-012024-06-300001621227adap:CmcAndQualitySegmentMember2024-04-012024-06-300001621227adap:BiomarkersSegmentMember2024-04-012024-06-300001621227adap:SupportFunctionsSegmentMember2024-01-012024-06-300001621227adap:ResearchSegmentMember2024-01-012024-06-300001621227adap:OtherSegmentMember2024-01-012024-06-300001621227adap:InfrastructureManagementAndFacilitiesSegmentMember2024-01-012024-06-300001621227adap:DevelopmentAndComplianceSegmentMember2024-01-012024-06-300001621227adap:CommercialPlanningSegmentMember2024-01-012024-06-300001621227adap:CmcAndQualitySegmentMember2024-01-012024-06-300001621227adap:BiomarkersSegmentMember2024-01-012024-06-300001621227adap:StrategicCollaborationAndLicenseAgreementMember2024-04-012024-06-300001621227adap:StrategicCollaborationAndLicenseAgreementMember2024-04-122024-04-120001621227us-gaap:CommonStockMember2025-06-300001621227us-gaap:CommonStockMember2025-03-310001621227us-gaap:CommonStockMember2024-12-310001621227us-gaap:CommonStockMember2024-06-300001621227us-gaap:CommonStockMember2024-03-310001621227us-gaap:CommonStockMember2023-12-3100016212272024-06-3000016212272023-12-310001621227us-gaap:FairValueMeasurementsRecurringMember2025-06-300001621227us-gaap:ResearchAndDevelopmentExpenseMember2025-04-012025-06-300001621227us-gaap:GeneralAndAdministrativeExpenseMember2025-04-012025-06-300001621227us-gaap:ResearchAndDevelopmentExpenseMember2025-01-012025-06-300001621227us-gaap:GeneralAndAdministrativeExpenseMember2025-01-012025-06-300001621227us-gaap:ResearchAndDevelopmentExpenseMember2024-04-012024-06-300001621227us-gaap:GeneralAndAdministrativeExpenseMember2024-04-012024-06-300001621227us-gaap:ResearchAndDevelopmentExpenseMember2024-01-012024-06-300001621227us-gaap:GeneralAndAdministrativeExpenseMember2024-01-012024-06-300001621227us-gaap:CustomerConcentrationRiskMember2025-06-300001621227us-gaap:CustomerConcentrationRiskMember2024-12-3100016212272025-08-110001621227adap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-01-012025-06-300001621227adap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2024-06-012024-06-300001621227adap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2024-05-302024-05-300001621227adap:GskTerminationAndTransferAgreementMember2023-06-012023-06-300001621227adap:StrategicCollaborationAndLicenseAgreementMember2024-04-120001621227adap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-06-300001621227adap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2024-05-300001621227adap:GskTerminationAndTransferAgreementMember2023-04-060001621227dei:AdrMemberadap:SalesAgreement2022Member2025-03-312025-03-310001621227dei:AdrMemberadap:SalesAgreement2022Member2025-01-012025-06-300001621227us-gaap:AdditionalPaidInCapitalMember2025-04-012025-06-300001621227us-gaap:AdditionalPaidInCapitalMember2025-01-012025-03-3100016212272025-01-012025-03-310001621227us-gaap:AdditionalPaidInCapitalMember2024-04-012024-06-300001621227us-gaap:AdditionalPaidInCapitalMember2024-01-012024-03-3100016212272024-01-012024-03-310001621227us-gaap:CommonStockMember2025-04-012025-06-300001621227us-gaap:CommonStockMember2025-01-012025-03-310001621227us-gaap:CommonStockMember2024-01-012024-03-310001621227adap:SalesAgreement2022Member2025-01-012025-06-300001621227srt:MaximumMemberadap:SalesAgreement2022Member2022-04-082022-04-080001621227adap:SalesAgreement2022Member2025-04-012025-04-010001621227adap:StrategicCollaborationAndLicenseAgreementMember2024-07-012024-09-300001621227adap:StrategicCollaborationAndLicenseAgreementMember2024-09-230001621227adap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMemberus-gaap:SubsequentEventMember2025-07-272025-07-270001621227srt:MaximumMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-01-012025-06-300001621227adap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2024-05-142024-05-1400016212272024-04-012024-06-300001621227us-gaap:ProductMember2025-04-012025-06-300001621227us-gaap:ProductMember2025-01-012025-06-3000016212272025-04-012025-06-300001621227adap:GskTerminationAndTransferAgreementMember2024-08-012024-08-310001621227adap:GskTerminationAndTransferAgreementMember2024-06-012024-06-300001621227adap:GskTerminationAndTransferAgreementMember2023-12-012023-12-310001621227adap:GskTerminationAndTransferAgreementMember2023-09-012023-09-300001621227adap:ResearchAndDevelopmentMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-01-012025-06-300001621227adap:ResearchAndDevelopmentMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2024-06-012024-06-300001621227adap:ResearchAndDevelopmentMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2024-05-302024-05-3000016212272024-01-012024-12-310001621227srt:MaximumMemberadap:DevelopmentMilestoneMemberadap:GalapagosCollaborationAndExclusiveLicenseAgreementMember2025-01-012025-06-300001621227srt:MaximumMemberadap:AchievementOfNetProductRevenueEqualToOrExceedingEighteenMillionMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMemberus-gaap:SubsequentEventMember2025-07-270001621227adap:UsFoodAndDrugAdministrationMarketingApprovalMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMemberus-gaap:SubsequentEventMember2025-07-270001621227adap:AchievementOfNetProductRevenueEqualToOrExceedingTwoHundredMillionMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMemberus-gaap:SubsequentEventMember2025-07-270001621227srt:MaximumMemberadap:LoanAndSecurityAgreementMember2025-07-270001621227adap:UsFoodAndDrugAdministrationAcceptanceMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember2025-07-270001621227adap:AchievementOfNetProductRevenueEqualToOrExceedingEighteenMillionMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMemberus-gaap:SubsequentEventMember2025-07-270001621227adap:StrategicCollaborationAndLicenseAgreementMember2024-09-3000016212272025-03-2600016212272025-03-240001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodTwoMemberus-gaap:NotesPayableToBanksMember2024-08-130001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodOneMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227us-gaap:NotesPayableToBanksMember2025-03-240001621227adap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodTwoMemberus-gaap:NotesPayableToBanksMember2024-08-132024-08-130001621227adap:LoanAndSecurityAgreementMemberus-gaap:DebtInstrumentRedemptionPeriodOneMemberus-gaap:NotesPayableToBanksMember2024-05-142024-05-140001621227adap:LoanAndSecurityAgreementMemberus-gaap:NotesPayableToBanksMember2025-06-300001621227us-gaap:ResearchMember2025-07-042025-07-0400016212272025-06-3000016212272024-12-3100016212272025-01-012025-06-3000016212272024-01-012024-06-30adap:securityadap:segmentiso4217:USDxbrli:pureiso4217:GBPadap:itemadap:loanadap:customeriso4217:USDxbrli:sharesxbrli:sharesiso4217:GBPxbrli:shares

Table of Contents

​

​

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 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  001-37368

ADAPTIMMUNE THERAPEUTICS PLC

(Exact name of Registrant as specified in its charter)

​	​
England and Wales	Not Applicable
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

​

60 Jubilee Avenue, Milton Park

Abingdon, Oxfordshire OX14 4RX

United Kingdom

(Address of principal executive offices)

(44) 1235 430000

(Registrant’s telephone number, including area code)

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

Title of each class	Trading Symbol	Name of each exchange on which registered
​	​	​
American Depositary Shares, each representing 6 Ordinary Shares, par value £0.001 per share	ADAP	The Nasdaq Capital Market

​

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 (§232.405 of this chapter) 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” and “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

​	​
Large accelerated filer ◻	Accelerated filer ◻
Non-accelerated filerx	Smaller reporting company x
​	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 standard 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 August 11, 2025, the number of outstanding ordinary shares par value £0.001 per share of the Registrant is 1,590,309,546.

​

​

​

Table of Contents

TABLE OF CONTENTS

​	​	​
PART I — FINANCIAL INFORMATION		4
​		​
Item 1.	Financial Statements:	4
​	​	​
​	Unaudited Condensed Consolidated Balance Sheets as of June 30, 2025 and December 31, 2024	4
​	​	​
​	Unaudited Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2025 and 2024	5
​	​	​
​	Unaudited Condensed Consolidated Statements of Comprehensive Income/Loss for the three and six months ended June 30, 2025 and 2024	6
​	​	​
​	Unaudited Condensed Consolidated Statements of Change in Equity for the three and six months ended June 30, 2025 and 2024	7
​	​	​
​	Unaudited Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2025 and 2024	9
​	​	​
​	Notes to the Unaudited Condensed Consolidated Financial Statements	10
​	​	​
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
​	​	​
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	40
​	​	​
Item 4.	Controls and Procedures	40
​	​	​
PART II — OTHER INFORMATION		40
​		​
Item 1.	Legal Proceedings	40
​	​	​
Item 1A.	Risk Factors	41
​	​	​
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	41
​	​	​
Item 3.	Defaults Upon Senior Securities	41
​	​	​
Item 4.	Mine Safety Disclosures	42
​	​	​
Item 5.	Other Information	42
​	​	​
Item 6.	Exhibits	42
​	​	​
Signatures		43

​

​

2

Table of Contents

General information

In this Quarterly Report on Form 10-Q (“Quarterly Report”), “Adaptimmune,” the “Group,” the “Company,” “we,” “us” and “our” refer to Adaptimmune Therapeutics plc and its consolidated subsidiaries, except where the context otherwise requires.

Information Regarding Forward-Looking Statements

This Quarterly Report contains forward-looking statements that involve risks and uncertainties, as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. We make such forward-looking statements pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and other federal securities laws. All statements other than statements of historical facts contained in this Quarterly Report are forward-looking statements. In some cases, you can identify forward-looking statements by words such as “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “expect” or the negative of these words or other comparable terminology.

Any forward-looking statements in this Quarterly Report reflect our current views with respect to future events or to our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these forward-looking statements. Factors that may cause actual results to differ materially from current expectations include, among other things, those discussed in Part I, Item 1A “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2024 filed with the Securities and Exchange Commission (the “SEC”) on March 24, 2025 (the “2024 Annual Report”). Given these uncertainties, you should not place undue reliance on these forward-looking statements. Except as required by law, we assume no obligation to update or revise these forward-looking statements for any reason, even if new information becomes available in the future.

​

This Quarterly Report also contains estimates, projections and other information concerning our industry, our business, and the markets for certain diseases, including data regarding the estimated size of those markets, and the incidence and prevalence of certain medical conditions. Information that is based on estimates, forecasts, projections, market research or similar methodologies is inherently subject to uncertainties and actual events or circumstances may differ materially from events and circumstances reflected in this information. Unless otherwise expressly stated, we obtained this industry, business, market and other data from reports, research surveys, studies and similar data prepared by third parties, industry, medical and general publications, government data and similar sources.

​

​

​

3

Table of Contents

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements.

ADAPTIMMUNE THERAPEUTICS PLC

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)

​	​	​	​	​	​	​
​	​	June 30,		​	December 31,
​		2025			2024
Assets	​	​	​	​	​	​
Current assets	​	​	​	​	​	​
Cash and cash equivalents	​	$	26,061	​	$	91,139
Marketable securities - available-for-sale debt securities (amortized cost of $0 and $60,451) net of allowance for expected credit losses of $0 and $0	​	​	-	​	​	60,466
Accounts receivable, net of allowance for expected credit losses of $0 and $0	​	​	9,313	​	​	1,454
Inventory, net	​	​	11,411	​	​	7,320
Other current assets and prepaid expenses	​	​	31,330	​	​	27,790
Total current assets	​	​	78,115	​	​	188,169
​	​	​	​	​	​	​
Restricted cash	​	​	1,717	​	​	2,067
Other non-current assets	​	​	94	​	​	629
Operating lease right-of-use assets, net of accumulated amortization of $20,721 and $17,750	​	​	18,748	​	​	19,909
Property, plant and equipment, net of accumulated depreciation of $75,028 and $51,893	​	​	28,152	​	​	31,309
Intangible assets, net of accumulated amortization of $6,141 and $5,567	​	​	3,807	​	​	3,880
Total assets	​	$	130,633	​	$	245,963
​	​	​	​	​	​	​
Liabilities and stockholders’ equity	​	​	​	​	​	​
Current liabilities	​	​	​	​	​	​
Accounts payable	​	$	9,418	​	$	8,692
Operating lease liabilities, current	​	​	4,514	​	​	4,709
Accrued expenses and other current liabilities	​	​	24,526	​	​	32,919
Restructuring provision	​	​	2,355	​	​	5,911
Deferred revenue, current	​	​	10,700	​	​	12,296
Total current liabilities	​	​	51,513	​	​	64,527
​	​	​	​	​	​	​
Operating lease liabilities, non-current	​	​	18,491	​	​	19,263
Deferred revenue, non-current	​	​	101,419	​	​	95,815
Borrowings, non-current	​	​	25,675	​	​	50,237
Other liabilities, non-current	​	​	4,493	​	​	4,272
Total liabilities	​	​	201,591	​	​	234,114
​	​	​	​	​	​	​
Stockholders’ equity	​	​	​	​	​	​
Common stock - Ordinary shares par value £0.001, 2,108,130,546 authorized and 1,590,309,546 issued and outstanding (2024: 2,039,252,874 authorized and 1,535,653,620 issued and outstanding)	​	​	2,156	​	​	2,085
Additional paid in capital	​	​	1,109,409	​	​	1,105,653
Accumulated other comprehensive loss	​	​	(10,612)	​	​	(1,902)
Accumulated deficit	​	​	(1,171,911)	​	​	(1,093,987)
Total stockholders' equity	​	​	(70,958)	​	​	11,849
​	​	​	​	​	​	​
Total liabilities and stockholders’ equity	​	$	130,633	​	$	245,963

​

See accompanying notes to unaudited condensed consolidated financial statements.

4

Table of Contents

ADAPTIMMUNE THERAPEUTICS PLC

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except share and per share data)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

Six months ended

​

​

​

June 30,

​

June 30,

​

​

2025

2024

2025

2024

​

Revenue:

​

​

​

​

​

​

​

​

​

​

​

​

​

Product revenue, net

​

$

11,078

​

$

—

​

$

15,126

​

$

—

​

Development revenue

​

​

2,599

​

​

128,231

​

​

5,836

​

​

133,909

​

Total revenue

​

​

13,677

​

​

128,231

​

​

20,962

​

​

133,909

​

Operating expenses:

​

​

​

​

​

​

​

​

​

​

​

​

​

Cost of goods sold

​

​

(2,501)

​

​

—

​

​

(3,380)

​

​

—

​

Research and development

​

​

(22,979)

​

​

(40,448)

​

(51,836)

​

(75,655)

​

Selling, general and administrative

​

​

(18,485)

​

​

(19,083)

​

(41,767)

​

(38,815)

​

Total operating expenses

​

​

(43,965)

​

​

(59,531)

​

​

(96,983)

​

(114,470)

​

(Loss)/profit from operations

​

​

(30,288)

​

​

68,700

​

(76,021)

​

19,439

​

Interest income

​

​

233

​

​

1,376

​

1,143

​

2,721

​

Interest expense

​

​

(962)

​

​

(526)

​

​

(2,843)

​

​

(526)

​

Other income (expense), net

​

​

1,289

​

​

497

​

984

​

436

​

(Loss)/profit before income tax expense

​

​

(29,728)

​

​

70,047

​

(76,737)

​

22,070

​

Income tax expense

​

​

(612)

​

​

(526)

​

(1,187)

​

(1,052)

​

Net (loss)/profit attributable to ordinary shareholders

​

$

(30,340)

​

$

69,521

​

$

(77,924)

​

$

21,018

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Net (loss)/profit per ordinary share

​

​

​

​

​

​

​

​

​

​

​

​

​

Basic

​

$

(0.02)

​

$

0.05

​

$

(0.05)

​

$

0.01

​

Diluted

​

$

(0.02)

​

$

0.04

​

$

(0.05)

​

$

0.01

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Weighted average shares outstanding:

​

​

​

​

​

​

​

​

​

​

​

​

​

Basic

​

​

1,584,522,868

​

​

1,533,531,837

​

1,563,458,270

​

1,492,386,749

​

Diluted

​

​

1,584,522,868

​

​

1,559,183,774

​

​

1,563,458,270

​

​

1,519,004,675

​

​

See accompanying notes to unaudited condensed consolidated financial statements.

​

5

Table of Contents

ADAPTIMMUNE THERAPEUTICS PLC

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS/INCOME

(In thousands)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

Six months ended

​

​

​

June 30,

​

June 30,

​

​

2025

2024

​

2025

​

2024

​

Net (loss)/profit

​

$

(30,340)

​

$

69,521

​

$

(77,924)

​

$

21,018

​

Other comprehensive (loss)/income, net of tax

​

​

​

​

​

​

​

​

​

​

​

​

​

Foreign currency translation adjustments, net of tax of $0 and $0

​

​

(50,858)

​

​

(2,091)

​

​

(79,051)

​

​

4,724

​

Foreign currency gains/(losses) on intercompany loan of a long-term investment nature, net of tax of $0 and $0

​

​

44,655

​

​

1,400

​

​

70,358

​

​

(4,382)

​

Unrealized holding gains/(losses) on available-for-sale debt securities, net of tax of $0 and $0

​

​

3

​

​

(1)

​

​

(17)

​

​

(6)

​

Total comprehensive (loss)/income for the period

​

$

(36,540)

​

$

68,829

​

$

(86,634)

​

$

21,354

​

​

See accompanying notes to unaudited condensed consolidated financial statements.

​

6

Table of Contents

ADAPTIMMUNE THERAPEUTICS PLC

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGE IN EQUITY

(In thousands, except share data)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Accumulated

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

other

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

comprehensive

​

​

​

​

Total

​

​

Common

​

Common

​

Additional

​

(loss)

​

Accumulated

​

stockholders’

​

stock

stock

paid in capital

income

deficit

equity

Balance as of January 1, 2025

​

1,535,653,620

​

​

2,085

​

​

1,105,653

​

​

(1,902)

​

​

(1,093,987)

​

$

11,849

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Net loss

—

​

​

—

​

​

—

​

​

—

​

​

(47,584)

​

​

(47,584)

Other comprehensive loss

​

—

​

​

—

​

​

—

​

​

(2,510)

​

​

—

​

​

(2,510)

Issuance of shares upon exercise of stock options

7,738,026

​

​

9

​

​

—

​

​

—

​

​

—

​

​

9

Issue of shares under At The Market sales agreement, net of commission and expenses

​

3,702,162

​

​

5

​

​

117

​

​

—

​

​

—

​

​

122

Share-based compensation expense

—

​

​

—

​

​

685

​

​

—

​

​

—

​

​

685

Balance as of March 31, 2025

1,547,093,808

​

$

2,099

​

$

1,106,455

​

$

(4,412)

​

$

(1,141,571)

​

$

(37,429)

Net loss

—

​

​

—

​

​

—

​

​

—

​

​

(30,340)

​

​

(30,340)

Other comprehensive loss

​

—

​

​

—

​

​

—

​

​

(6,200)

​

​

—

​

​

(6,200)

Issuance of shares upon exercise of stock options

637,734

​

​

1

​

​

—

​

​

—

​

​

—

​

​

1

Issue of shares under At The Market sales agreement, net of commission and expenses

​

42,578,004

​

​

56

​

​

1,597

​

​

—

​

​

—

​

​

1,653

Share-based compensation expense

—

​

​

—

​

​

1,357

​

​

—

​

​

—

​

​

1,357

Balance as of June 30, 2025

1,590,309,546

​

​

2,156

​

​

1,109,409

​

​

(10,612)

​

​

(1,171,911)

​

​

(70,958)

​

​

See accompanying notes to unaudited condensed consolidated financial statements.

​

7

Table of Contents

​

ADAPTIMMUNE THERAPEUTICS PLC

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGE IN EQUITY

(In thousands, except share data)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Accumulated

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

other

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

comprehensive

​

​

​

​

Total

​

​

Common

​

Common

​

Additional

​

(loss)

​

Accumulated

​

stockholders’

​

​

stock

stock

paid in capital

income

deficit

equity

Balance as of January 1, 2024

1,363,008,102

​

$

1,865

​

$

1,064,569

​

$

(3,748)

​

$

(1,023,173)

​

$

39,513

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Net loss

—

​

​

—

​

​

—

​

​

—

​

​

(48,503)

​

​

(48,503)

Other comprehensive income

​

—

​

​

—

​

​

—

​

​

1,028

​

​

—

​

​

1,028

Issuance of shares upon exercise of stock options

6,297,720

​

​

8

​

​

66

​

​

—

​

​

—

​

​

74

Issue of shares under At The Market sales agreement, net of commission and expenses

​

163,669,056

​

​

208

​

​

28,953

​

​

—

​

​

—

​

​

29,161

Share-based compensation expense

—

​

​

—

​

​

3,102

​

​

—

​

​

—

​

​

3,102

Balance as of March 31, 2024

1,532,974,878

​

$

2,081

​

$

1,096,690

​

$

(2,720)

​

$

(1,071,676)

​

$

24,375

Net loss

—

​

​

—

​

​

—

​

​

—

​

​

69,521

​

​

69,521

Other comprehensive loss

​

—

​

​

—

​

​

—

​

​

(692)

​

​

—

​

​

(692)

Issuance of shares upon exercise of stock options

1,245,726

​

​

2

​

​

—

​

​

—

​

​

—

​

​

2

Issue of shares under At The Market sales agreement, net of commission and expenses

​

—

​

​

—

​

​

10

​

​

—

​

​

—

​

​

10

Share-based compensation expense

—

​

​

—

​

​

3,058

​

​

—

​

​

—

​

​

3,058

Balance as of June 30, 2024

1,534,220,604

​

$

2,083

​

$

1,099,758

​

$

(3,412)

​

$

(1,002,155)

​

$

96,274

​

​

See accompanying notes to unaudited condensed consolidated financial statements.

​

8

Table of Contents

ADAPTIMMUNE THERAPEUTICS PLC

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

​	​	​	​	​	​	​
​	​	Six months ended
​	​	June 30,
​		2025			2024
Cash flows from operating activities	​	​	​	​	​	​
Net (loss)/profit	​	$	(77,924)	​	$	21,018
Adjustments to reconcile net loss to net cash used in operating activities:	​	​	​	​	​	​
Depreciation	​	​	4,620	​	​	5,457
Amortization	​	​	355	​	​	115
Share-based compensation expense	​	​	1,990	​	​	6,160
Unrealized foreign exchange gains	​	​	(888)	​	​	(266)
Accretion of available-for-sale debt securities	​	​	(509)	​	​	(42)
Other	​	​	56	​	​	2
Changes in operating assets and liabilities:	​	​	​	​	​	​
(Increase)/decrease in receivables and other operating assets	​	​	(9,158)	​	​	20,788
Increase in inventories	​	​	(4,041)	​	​	—
(Decrease)/increase in payables and other current liabilities	​	​	(11,407)	​	​	1,012
Decrease in noncurrent assets	​	​	562	​	​	—
Increase in borrowings and other non-current liabilities	​	​	784	​	​	454
Decrease in deferred revenue	​	​	(5,812)	​	​	(39,249)
Net cash (used in)/provided by operating activities	​	​	(101,372)	​	​	15,449
​	​	​	​	​	​	​
Cash flows from investing activities	​	​	​	​	​	​
Acquisition of property, plant and equipment	​	​	(1,278)	​	​	(524)
Acquisition of intangible assets	​	​	—	​	​	(588)
Maturity, redemption or sale of marketable securities	​	​	76,950	​	​	—
Investment in marketable securities	​	​	(16,090)	​	​	—
Other	​	​	62	​	​	11
Net cash provided by/(used in) investing activities	​	​	59,644	​	​	(1,101)
​	​	​	​	​	​	​
Cash flows from financing activities	​	​	​	​	​	​
Proceeds from issuance of borrowings, net of discount	​	​	—	​	​	24,500
Repayment of borrowings	​	​	(25,451)	​	​	—
Proceeds from issuance of common stock from offerings, net of commissions and issuance costs	​	​	1,775	​	​	29,171
Proceeds from exercise of stock options	​	​	10	​	​	76
Net cash (used in)/provided by financing activities	​	​	(23,666)	​	​	53,747
​	​	​	​	​	​	​
Effect of currency exchange rate changes on cash, cash equivalents and restricted cash	​	​	(34)	​	​	(436)
Net (decrease)/increase in cash, cash equivalents and restricted cash	​	​	(65,428)	​	​	67,659
Cash, cash equivalents and restricted cash at start of period	​	​	93,206	​	​	147,017
Cash, cash equivalents and restricted cash at end of period	​	$	27,778	​	$	214,676

​

See accompanying notes to unaudited condensed consolidated financial statements.

​

9

Table of Contents

ADAPTIMMUNE THERAPEUTICS PLC

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Note 1 — General

Adaptimmune Therapeutics plc is registered in England and Wales. Its registered office is 60 Jubilee Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4RX, United Kingdom (“U.K”). Adaptimmune Therapeutics plc and its subsidiaries (collectively “Adaptimmune” or the “Company”) is a commercial-stage biopharmaceutical company primarily focused on the treatment of solid tumor cancers with cell therapies. The Company’s proprietary platform enables it to identify cancer targets, find and develop cell therapy candidates active against those targets and produce therapeutic candidates for administration to patients.

The Company is subject to a number of risks similar to other biopharmaceutical companies in the early commercial and clinical development stages including, but not limited to, the need to obtain adequate additional funding, possible failure of preclinical programs or clinical programs, the need to obtain marketing approval for its cell therapies, competitors developing new technological innovations, the need to successfully commercialize and gain market acceptance of its cell therapies, the need to develop a reliable commercial manufacturing process, the need to commercialize any cell therapies that may be approved for marketing, and protection of proprietary technology. If the Company does not successfully commercialize any of its cell therapies, it will be unable to generate product revenue or achieve profitability. Even though the Company has obtained marketing approval for its first cell therapy, TECELRA® (afamitresgene autoleucel) (“TECELRA”), it will take a period of time before any significant revenue is realized and the amount of revenue is heavily dependent on the success of commercialization and the costs of supplies including any post-marketing requirements the Company is subject to. The Company had an accumulated deficit of $1,171,911,000 as of June 30, 2025.

Note 2 — Summary of Significant Accounting Policies

(a)          Basis of presentation

The condensed consolidated financial statements of Adaptimmune Therapeutics plc and its subsidiaries and other financial information included in this Quarterly Report are unaudited and have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and are presented in U.S. dollars. All significant intercompany accounts and transactions between the Company and its subsidiaries have been eliminated on consolidation.

The unaudited condensed consolidated financial statements presented in this Quarterly Report should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s 2024 Annual Report. The condensed consolidated balance sheet as of December 31, 2024, as presented herein, was derived from audited consolidated financial statements included in the Company’s 2024 Annual Report but does not include all disclosures required by U.S. GAAP. The Company’s significant accounting policies are described in Note 2 to those consolidated financial statements.

Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted from these interim financial statements. However, these interim financial statements include all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of management, necessary to fairly state the results of the interim period. The interim results are not necessarily indicative of results to be expected for the full year.

(b)          Use of estimates in interim financial statements

The preparation of interim financial statements, in conformity with U.S. GAAP and SEC regulations, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the interim financial statements and reported amounts of revenues and expenses during the reporting period. Estimates and assumptions are made in various areas, including in relation to valuation allowances relating to deferred tax assets, revenue recognition, the fair value of assets acquired, liabilities assumed, and estimation of the incremental borrowing rate for operating leases. If actual results differ from the Company’s estimates, or to the extent these estimates are adjusted in future periods, the Company’s results of operations could either benefit from, or be adversely affected by, any such change in estimate.

10

Table of Contents

(c)          Going Concern

In accordance with Accounting Standards Codification (“ASC”) 205-40, Going Concern, the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date the financial statements are issued.

As of June 30, 2025, the Company had cash and cash equivalents of $26.1 million, marketable securities of $0, and negative stockholders’ equity of $71.0 million. During the six months ended June 30, 2025, the Company incurred a net loss of $77.9 million, used cash of $101.4 million in its operating activities, and generated revenues of $21.0 million. The Company has incurred net losses in most periods since inception and it expects to incur operating losses in future periods.

On July 27, 2025, the Company, entered into an Asset Purchase Agreement with USWM CT, LLC (“Purchaser”), a subsidiary of US WorldMeds Partners, LLC. Pursuant to the terms set forth in the Agreement, Adaptimmune agreed to sell to Purchaser the assets and rights related to Adaptimmune’s TECELRA, letecel, afami-cel and uza-cel cell therapies, and Purchaser agreed to assume certain liabilities related to the Products. The Transaction was completed on July 31, 2025. Upon consummation of the Transaction, the Purchaser paid $55.0 million in cash, a portion of which the Purchaser paid directly to Hercules Capital, Inc. (“Hercules”) to repay all of Adaptimmune’s indebtedness under that certain Loan and Security Agreement, dated May 14, 2024, by and among Adaptimmune, Hercules and the other parties thereto. In addition, Purchaser has agreed to make future payments to Adaptimmune of up to $30.0 million in cash upon the achievement of certain regulatory and commercial milestones related to the Products within certain specified time periods and subject to certain specified reductions. In connection with the Transaction, the Company also entered into (i) a license agreement, pursuant to which,

among other things, Purchaser will be exclusively licensed residual intellectual property rights necessary for the manufacture and commercialization of the Products and (ii) a transition services agreement, pursuant to which Adaptimmune will agree to provide certain transition services to facilitate the transfer of purchased assets to US WorldMeds. Transition services will end, on a transition service-by-transition service basis, upon the earlier of the end of the term specified for each transition service and June 30, 2026 and are reimbursed by Purchaser.

​

On July 28, 2025, the Company also announced a restructuring in connection with the above Asset Purchase Agreement Transaction. Following consummation of the Transaction the Company plans to further reduce its remaining workforce by approximately 62%. The planned reduction in workforce is subject to consultation with employee representatives in the United Kingdom regarding the plan. The Company anticipates that much of the reduction in workforce will be completed during the third quarter of 2025. As a result of these actions, the Company expects to incur pre-tax costs, relating to employee severance and other employee related costs, of approximately $7.0 million to 8 million. The Company expects to incur the majority of such costs during the third quarter of 2025. This will significantly reduce the headcount, operations and costs base of the remaining company.

We intend to continue to look to monetize our remaining early stage pre-clincial assets including PRAME and ADP-520 and may engage in future financing activities.

As a result of the above activities, management considers that cash and cash equivalents will be sufficient to meet operating requirements through the 12 months following the filing of this Quarterly Report.

(d) Fair value measurements

The Company is required to disclose information on all assets and liabilities reported at fair value that enables an assessment of the inputs used in determining the reported fair values. The fair value hierarchy prioritizes valuation inputs based on the observable nature of those inputs. The hierarchy defines three levels of valuation inputs:

Level 1 - Quoted prices in active markets for identical assets or liabilities

Level 2 - Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly

Level 3 - Unobservable inputs that reflect the Company's own assumptions about the assumptions market participants would use in pricing the asset or liability

11

Table of Contents

The carrying amounts of the Company’s cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses approximate fair value because of the short-term nature of these instruments. The fair value of marketable securities, which are measured at fair value on a recurring basis is detailed in Note 6, Fair value measurements.

(e)          Significant concentrations of credit risk

The Company held cash and cash equivalents of $26,061,000, and restricted cash of $1,717,000 as of June 30, 2025. The cash and cash equivalents and restricted cash are held with multiple banks and the Company monitors the credit rating of those banks. The Company maintains cash balances in excess of amounts insured by the Federal Deposit Insurance Corporation in the United States (“U.S.”) and the U.K. Government Financial Services Compensation Scheme in the U.K. The Company’s investment policy limits investments to certain types of instruments, such as money market instruments, corporate debt securities and commercial paper, places restrictions on maturities and concentration by type and issuer and specifies the minimum credit ratings for all investments and the average credit quality of the portfolio.

The Company made sales of TECELRA to commercial customers and had two development revenue-generating customers during the three and six months ended June 30, 2025 which are Galapagos NV (“Galapagos”), and GSK. There were accounts receivable of $9,313,000 as of June 30, 2025 and $1,454,000 as of December 31, 2024. The Company has been transacting with Galapagos since 2024 and GSK since 2014 and has been selling products commercially since November 2024, during which time no credit losses have been recognized. As of June 30, 2025, the allowance for expected credit losses was not significant on the basis that the possibility of credit losses arising on its receivables as of June 30, 2025 is considered to be remote.

​

Management analyzes current and past due accounts and determines if an allowance for credit losses is required based on collection experience, credit worthiness of customers and other relevant information. The process of estimating the uncollectible accounts involves assumptions and judgments and the ultimate amounts of uncollectible accounts receivable could be in excess of the amounts provided.

(f) New accounting pronouncements

Adopted in the current period

Improvements to Income Tax Disclosures

​

In December 2023, the FASB issued ASU 2023-09 – Income Taxes (Topic 740) – Improvements to Income Tax Disclosures, which improves income tax disclosures primarily relating to the rate reconciliation and income taxes paid information. This includes a tabular reconciliation using both percentages and reporting currency amounts, covering various tax and reconciling items, and disaggregated summaries of income taxes paid during the period. For public business entities, the guidance is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The Company intends to adopt the guidance in its Annual Report on Form 10-K for the fiscal year beginning January 1, 2025. The Company is currently evaluating the impact of the guidance on its Consolidated financial statements.

​

To be adopted in future periods

​

Disaggregation of Income Statement Expenses

​

In November 2024, the FASB issued ASU 2024-03 Disaggregation of Income Statement Expense, which improves disclosure around the nature of expenses included in the income statement. The improvements require entities to disaggregate and disclose the amounts of certain types of expenses included in certain expense captions. For public business entities, the guidance is effective for annual periods beginning after December 15, 2026, with early adoption permitted. The Company intends to adopt the guidance in its Annual Report on Form 10-K for the fiscal year beginning January 1, 2027. The Company is currently evaluating the impact of the guidance on its Consolidated financial statements.

​

​

12

Table of Contents

​

Note 3 — Revenue

The Company generates product revenue from sales of TECELRA.

The Company generates development revenue from collaboration agreements with customers. The Company had two development revenue-generating contracts with customers in the three months and six months ended June 30, 2025 and three revenue generating contracts in the three and six months ended June 30, 2024: a termination and transfer agreement with GSK that was entered into on April 6, 2023 (the “Termination and Transfer Agreement”), a collaboration and license agreement with Galapagos executed on May 30, 2024 (the “Galapagos Collaboration Agreement”). The collaboration agreement with Genentech was terminated in April 2024 and the termination became effective on September 23, 2024.

Revenue comprises the following categories (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

Six months ended

​

June 30,

​

June 30,

​

2025

2024

​

2025

2024

​

​

​

​

​

​

​

​

​

​

​

​

​

Product revenue, net

​

$

11,078

​

$

—

​

$

15,126

​

$

—

Development revenue

​

2,599

​

128,231

​

​

5,836

​

133,909

​

$

13,677

$

128,231

​

$

20,962

$

133,909

​

​

Deferred revenue increased by $4,008,000 from $108,111,000 at December 31, 2024 to $112,119,000 at June 30, 2025 due to revenue recognized during the period of $5,812,000 that was included in deferred revenue at December 31, 2024 and a $9,820,000 increase caused by the change in the exchange rate between pound sterling and the U.S. dollar from £1.00 to $1.25 at December 31, 2024 to £1.00 to $1.37 at June 30, 2025.

​

The aggregate amount of the transaction price that is allocated to performance obligations that are unsatisfied or partially satisfied under the agreements as of June 30, 2025 was $121,309,000.

3.1. Product Revenue

The Company received U.S. Food and Drug Administration (“FDA”) approval on August 1, 2024, for TECELRA for the treatment of advanced MAGE-A4+ synovial sarcoma in adults with certain HLA types who have received prior chemotherapy. There are 20 Authorized Treatment Centers (“ATCs”) available to initiate the treatment journey for the patients. Product revenue represents sales of TECELRA which is derived from five ATCs and nine ATCs during the three months and six months ended June 30, 2025 respectively.

3.2. Development revenue

The Galapagos Collaboration and Exclusive License Agreement

On May 30, 2024, the Company entered into the Galapagos Collaboration Agreement, a clinical collaboration agreement with Galapagos. The Galapagos Collaboration Agreement includes an option for Galapagos to exclusively license the TCR T-cell therapy candidate uza-celuzatresgene autoleucel (“uza-cel”), manufactured on Galapagos’ decentralized manufacturing platform, in head and neck cancer and potential future solid tumor indications. Under the Galapagos Collaboration Agreement, we will conduct a clinical proof-of-concept trial (the “POC Trial”) to evaluate the safety and efficacy of uza-cel produced on Galapagos’ decentralized manufacturing platform in patients with head and neck cancer.

Under the terms of the Galapagos Collaboration Agreement, the Company will receive initial payments of $100 million, comprising $70 million upfront and $30 million of research and development funding of which $15 million is due upfront and $15 million is due once the first patient is infused in the POC Trial. In addition, there are option exercise fees of up to $100 million (the amount depending on the number of indications in relation to which the option is exercised), additional development and sales milestone payments

13

Table of Contents

of up to a maximum of $465 million, plus tiered royalties on net sales. The $70 million upfront payment and $15 million of upfront research and development funding was received by the Company in June 2024.

The Company determined that Galapagos is a customer and has accounted for the Galapagos Collaboration Agreement under ASC 606 Revenue from Contracts with Customers. The Company has identified a performance obligation relating to the various activities required to complete the POC trial and a material right associated with the exclusive license option.

The aggregate transaction price at inception of the Galapagos Collaboration Agreement was $100,000,000 comprising the $70,000,000 upfront payment and the $30,000,000 research and development funding. The fees for the exclusive license option exercise and development milestone payments are not considered probable as of June 30, 2025 and have not been included in the transaction price. The sales milestones and royalties for future sales of therapies have not been included within the transaction price as of June 30, 2025 because they are sales-based and would be recognized when the subsequent sales occur.

The aggregate transaction price is allocated to the performance obligations depending on the relative standalone selling price of the performance obligations. In determining the best estimate of the relative standalone selling price, the Company considered the internal pricing objectives it used in negotiating the contract, together with internal data regarding the expected costs and a standard margin on those costs, for completing the POC Trial. The residual approach was used to value the material right associated with the exclusive license option as the Company has not previously sold uza-cel on a standalone basis and has not established a price for uza-cel.

The Company expects to satisfy the POC Trial obligation over time over the period that the trial is completed, based on an estimate of the percentage of completion of the trial determined based on the costs incurred on the trial as a percentage of the total expected costs. The revenue allocated to the material right associated with the exclusive licence option will be recognized from the point that the option is either exercised and control of the license has passed to Galapagos or the option lapses.

The amount of the transaction price that is allocated to performance obligations that are unsatisfied or partially satisfied under the agreement as of June 30, 2025 was $97,935,000, of which $42,335,000 is allocated to the POC Trial performance obligation and $55,600,000 is allocated to the material right for the exclusive option.

The Genentech Collaboration and License Agreement

On April 12, 2024 the Company announced the termination of the collaboration agreement entered into by Adaptimmune Limited, a wholly-owned subsidiary of the Company, with Genentech on September 3, 2021 (the “Genentech Collaboration Agreement”), in relation to the research, development and commercialization of cancer targeted allogeneic T-cell therapies which was originally scheduled to be effective until October 7, 2024. The termination was accounted for as a contract modification on a cumulative catch-up basis. The termination did not change the nature of the performance obligations identified but resulted in a reduction in the transaction price as the additional payments and variable consideration that would have been due in periods after October 7, 2024 will now never be received.

The Company originally expected to satisfy the performance obligations relating to the initial ‘off-the-shelf’ collaboration targets and the personalized therapies as development progressed and recognized revenue based on an estimate of the percentage of completion of the project determined based on the costs incurred on the project as a percentage of the total expected costs. The Company expected to satisfy the performance obligations relating to the material rights to designate additional ‘off-the-shelf’ collaboration targets from the point that the options would have been exercised and then as development progressed, in line with the initial ‘off-the-shelf’ collaboration targets, or at the point in time that the rights expired. The Company expected to satisfy the performance obligations relating to the material rights to extend the research term from the point that the options would have been exercised and then over the period of the extension, or at the point in time that the rights expired.

The aggregate remaining transaction price that had not yet been recognized as revenue as of the date of the termination was $146,301,000 which included the remaining deferred revenue that had not been recognized as revenue as of the date of the modification and the variable consideration to be billed under the collaboration until the effective date of the termination that is still considered probable. The termination resulted in a cumulative catch-up adjustment to revenue at the date of the termination of $101,348,000 and a further $20,741,000 of revenue recognized in the second quarter of 2024.

14

Table of Contents

On September 23, 2024, the Adaptimmune Limited entered into a Mutual Release and Resolution Agreement (the “Mutual Release Agreement”) with Genentech. The Mutual Release Agreement, among other things, resolved and released each party from any and all past, present and future disputes, claims, demands and causes of action, whether known or unknown, related to the Genentech Collaboration Agreement in any way. Under the terms of the Mutual Release Agreement, Genentech will pay the Company $12.5 million upon which the Genentech Collaboration Agreement will be terminated. The Mutual Release Agreement was effective immediately as of September 23, 2024.

The Mutual Release Agreement resulted in all remaining performance obligations being fully satisfied and the remaining deferred revenue of $25,298,000 and the additional payment of $12,500,000 were both recognized as total revenue of $37,798,000 in the third quarter of 2024.

The GSK Termination and Transfer Agreement

On April 6, 2023, the Company and GSK entered into the Termination and Transfer Agreement, regarding the return of rights and materials comprised within the PRAME and NY-ESO cell therapy programs. The parties will work collaboratively to ensure continuity for patients in ongoing lete-cel clinical trials forming part of the NY-ESO cell therapy program.

As part of the Termination and Transfer Agreement, sponsorship and responsibility for the ongoing IGNYTE and long-term follow-up (“LTFU”) trials relating to the NY-ESO cell therapy program will transfer to the Company. In return for this, the Company received an upfront payment of £7.5 million in June 2023, following the signing of the agreement, and milestone payments of £3 million, £12 million, £6 million and £1.5 million in September and December 2023 and June and August 2024, respectively. No further payments are due from GSK under the Termination and Transfer Agreement.

The Company determined that GSK is a customer and has accounted for the Termination and Transfer Agreement under ASC 606 Revenue from Contracts with Customers. The Termination and Transfer Agreement is accounted for as a separate contract from the original Collaboration and License Agreement with GSK. The Termination and Transfer Agreement was terminated in October 2022 and the termination became effective on December 23, 2022. The Company has identified the following performance obligations under the Termination and Transfer Agreement: (i) to take over sponsorship for the IGNYTE trial and (ii) to take over sponsorship for the LTFU trial.

The aggregate transaction price at inception of the agreement was $37,335,000 comprising the total £30,000,000 upfront and milestone payments. No value was ascribed to non-cash consideration and there was no variable consideration identified. The aggregate transaction price is allocated to the performance obligations depending on the relative standalone selling price of the performance obligations. In determining the best estimate of the relative standalone selling price, the Company considered the internal pricing objectives it used in negotiating the contract, together with internal data regarding the expected costs and a standard margin on those costs, for completing the trials. The amount of the transaction price allocated to the performance obligation is recognized as or when the Company satisfies the performance obligation.

The Company expects to satisfy the performance obligations over time from the point that sponsorship of the active trials that make up the trial transfers and then over the period that the trial is completed, based on the number of patients transferred and still actively enrolled to date on the trial at a given period-end relative to the total estimated periods of active patient enrollment over the estimated duration of the trial.

The Company considers that this depicts the progress of the completion of the trials under the Termination and Transfer Agreement, as the status of patients on the trial is not directly affected by decisions that the Company might make relating to its own development of the NY-ESO cell therapy program.

The amount of the transaction price that is allocated to performance obligations that are unsatisfied or partially satisfied under the agreement as of June 30, 2025 was $23,374,000 of which $7,542,000 is allocated to the IGNYTE performance obligation and $15,832,000 is allocated to the LTFU performance obligation.

​

​

​

​

​

15

Table of Contents

​

Note 4 — Loss per share

The following tables reconcile the numerator and denominator in the basic and diluted loss per share computation (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

Six months ended

​

​

June 30,

​

June 30,

​

2025

2024

2025

2024

Numerator for basic and diluted (loss)/profit per share

​

​

​

​

​

​

​

​

​

​

​

​

Net (loss)/profit attributable to ordinary shareholders

$

(30,340)

$

69,521

$

(77,924)

$

21,018

Net (loss)/profit attributable to ordinary shareholders used for basic and diluted (loss)/profit per share

​

$

(30,340)

​

$

69,521

​

$

(77,924)

​

$

21,018

​

​

​

​	​	​	​	​	​	​	​	​
​	​	Three months ended			​	Six months ended
​	​	June 30,			​	June 30,
​		2025		2024		2025		2024
Denominator for basic (loss)/profit per share - Weighted average shares outstanding		1,584,522,868		1,533,531,837		1,563,458,270		1,492,386,749
Effect of dilutive securities:	​	​	​	​	​	​	​	​
Employee stock options		—		25,651,937		—		26,617,926
Denominator for diluted (loss)/profit per share		1,584,522,868		1,559,183,774		1,563,458,270		1,519,004,675

​

​

The dilutive effect of 261,875,895 stock options outstanding for the six months ended June 30, 2025 and 132,547,250 weighted stock options outstanding for the six months ended June 30, 2024 have been excluded from the diluted loss per share calculation because they would have an antidilutive effect on the loss per share for the period.

​

Note 5 — Accumulated other comprehensive (loss)/income

The Company reports foreign currency translation adjustments and the foreign exchange gain or losses arising on the revaluation of intercompany loans of a long-term investment nature within Other comprehensive (loss) income. Unrealized gains and losses on available-for-sale debt securities are also reported within Other comprehensive (loss) income until a gain or loss is realized, at which point they are reclassified to Other (expense) income, net in the Condensed Consolidated Statement of Operations.

16

Table of Contents

The following tables show the changes in accumulated other comprehensive (loss) income (in thousands):

​	​	​	​	​	​	​	​	​	​
​	​	Accumulated		​	Accumulated		​	​	Total
​	​	foreign		​	unrealized		​	​	accumulated
​	​	currency		​	(losses) gains on		​	​	other
​		translation			available-for-sale		​	​	comprehensive
​	​	adjustments		​	debt securities		​	​	(loss) income
​	​	​	​	​	​	​	​	​	​
Balance at January 1, 2025		$	(1,919)	​	$	17	​	$	(1,902)
Foreign currency translation adjustments	​	​	(28,193)	​	​	—	​	​	(28,193)
Foreign currency gains on intercompany loan of a long-term investment nature, net of tax of $0	​	​	25,703	​	​	—	​	​	25,703
Unrealized holding losses on available-for-sale debt securities, net of tax of $0	​	​	—	​	​	(20)	​	​	(20)
Balance at March 31, 2025	​	$	(4,409)	​	$	(3)	​	$	(4,412)
Foreign currency translation adjustments	​	​	(50,858)	​	​	—	​	​	(50,858)
Foreign currency gains on intercompany loan of a long-term investment nature, net of tax of $0	​	​	44,655	​	​	—	​	​	44,655
Unrealized holding gains on available-for-sale debt securities, net of tax of $0	​	​	—	​	​	3	​	​	3
Balance at June 30, 2025	​	$	(10,612)	​	$	—	​	$	(10,612)
​	​	​	​	​	​	​	​	​	​
​	​	Accumulated		​	Accumulated		​	Total
​	​	foreign		​	unrealized		​	accumulated
​	​	currency		​	(losses) on		​	other
​		translation			available-for-sale		​	comprehensive
​	​	adjustments		​	debt securities		​	(loss) income
​	​	​	​	​	​	​	​	​	​
Balance at January 1, 2024		$	(3,754)	​	$	6	​	​	(3,748)
Foreign currency translation adjustments	​	​	6,815	​	​	—	​	​	6,815
Foreign currency losses on intercompany loan of a long-term investment nature, net of tax of $0	​	​	(5,782)	​	​	—	​	​	(5,782)
Unrealized holding losses on available-for-sale debt securities, net of tax of $0	​	​	—	​	​	(5)	​	​	(5)
Balance at March 31, 2024	​	$	(2,721)	​	$	1	​	$	(2,720)
Foreign currency translation adjustments	​	​	(2,091)	​	​	—	​	​	(2,091)
Foreign currency losses on intercompany loan of a long-term investment nature, net of tax of $0	​	​	1,400	​	​	—	​	​	1,400
Unrealized holding losses on available-for-sale debt securities, net of tax of $0	​	​	—	​	​	(1)	​	​	(1)
Balance at June 30, 2024	​	$	(3,412)	​	$	—	​	$	(3,412)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Note 6 — Fair value measurements

Assets and liabilities are measured at fair value on a recurring basis based on Level 1, Level 2, and Level 3 fair value measurement criteria. However, as at June 30, 2025 there are no assets classified as available-for-sale debt securities.

​

Note 7 — Marketable securities – available-for-sale debt securities

As of June 30, 2025, the Company had no investments in marketable securities.

​

17

Table of Contents

The aggregate fair value (in thousands) and number of securities held by the Company (including those classified as cash equivalents) in an unrealized loss position as of June 30, 2025 and December 31, 2024 are as follows:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

June 30, 2025

​

December 31, 2024

​

Fair market value of investments in an unrealized loss position

​

Number of investments in an unrealized loss position

​

Unrealized losses

​

Fair market value of investments in an unrealized loss position

​

Number of investments in an unrealized loss position

​

Unrealized losses

Marketable securities in a continuous loss position for less than 12 months:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Corporate debt securities

$

—

​

—

​

$

—

$

4,679

$

2

​

$

(3)

​

$

—

​

—

​

$

—

$

4,679

$

2

$

(3)

​

During the six months ended June 30, 2025, the Company sold investments in marketable securities with a principal of $4,940,000 (based on the specific identification method) for proceeds of $4,940,000.

​

Note 8 — Other current assets

Other current assets consisted of the following (in thousands):

​	​	​	​	​	​	​
​	​	June 30,		​	December 31,
​		2025		​	2024
Research and development credits receivable		$	18,277	​	$	12,929
Prepayments		​	8,232	​	​	10,033
Clinical materials		​	—	​	​	59
VAT receivable	​	​	1,305	​	​	1,599
Other current assets		​	3,516	​	​	3,170
​	​	$	31,330	​	$	27,790

​

On July 4, 2025, a receipt of $14.2 million was received from HMRC relating to the Research and development credits receivable for the Financial Year 2024 claim.

​

Note 9 — Operating leases

The Company has operating leases in relation to property for office, manufacturing and research facilities.

The following table shows the lease costs for the six months ended June 30, 2025 and 2024 and the weighted-average remaining lease term and the weighted-average discount rate as at June 30, 2025 and 2024:

​

​	​	​	​	​	​	​	​
​	​	​	Six months ended
​	​	​	June 30,
​	​		2025			2024
Lease cost:	​	​	​	​	​	​	​
Operating lease cost	​		$	3,290		$	3,388
Short-term lease cost	​	​		32	​		88
​	​		$	3,322		$	3,476
​	​	​	​	​	​	​	​
​	​	​	June 30,
​	​	​	2025		​	2024
​	​	​	​	​	​	​	​
Weighted-average remaining lease term - operating leases	​	​	6.0 years		​	5.1 years
Weighted-average discount rate - operating leases	​	​	10.2%		​	7.8%

​

18

Table of Contents

The maturities of operating lease liabilities as of June 30, 2025 are as follows (in thousands):

​	​	​	​
​		Operating leases
​	​	​
2025		$	3,789
2026	​		4,774
2027	​		4,391
2028	​		4,443
2029	​		4,496
after 2029	​		7,952
Total lease payments	​	​	29,845
Less: Imputed interest	​	​	(6,840)
Present value of lease liability	​	$	23,005

​

The maximum lease term without activation of termination options is to 2041.

Note 10 — Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

​	​	​	​	​	​	​
​	​	June 30,		​	December 31,
​		2025			2024
Accrued clinical and development expenditure	​	$	10,000	​	$	11,931
Accrued commercial expenses and provisions	​	​	918	​	​	218
Accrued employee expenses	​	​	7,594	​	​	13,529
Other accrued expenditure	​	​	4,025	​	​	5,221
Other	​		1,989	​		2,020
​	​	$	24,526	​	$	32,919

​

​

​

​

Note 11 — Share-based compensation

The following table shows the total share-based compensation expense included in the unaudited consolidated statements of operations (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

Six months ended

​

​

​

​

June 30,

​

June 30,

​

​

2025

2024

2025

2024

​

Research and development

​

$

305

​

$

994

​

$

173

​

$

1,808

​

Selling, general and administrative

​

1,016

​

2,063

​

1,817

​

​

4,352

​

​

​

$

1,321

​

$

3,057

​

$

1,990

​

$

6,160

​

​

The following table shows information about share options and options which have a nominal exercise price (similar to restricted stock units (RSUs)) granted:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

Six months ended

​

​

​

​

June 30,

​

June 30,

​

​

​

2025

2024

2025

2024

​

Number of options over ordinary shares granted

​

​

24,711,600

​

​

1,795,872

​

​

24,711,600

​

​

43,982,424

​

Weighted average fair value of ordinary shares options

​

$

0.07

​

$

0.19

​

$

0.07

​

$

0.12

​

Number of additional options with a nominal exercise price granted

​

​

24,944,376

​

​

2,540,640

​

​

24,944,376

​

​

30,655,824

​

Weighted average fair value of options with a nominal exercise price

​

$

0.10

​

$

0.24

​

$

0.10

​

$

0.15

​

​

​

​

​

​

19

Table of Contents

​

Note 12 — Stockholders’ equity

On April 8, 2022 the Company entered into a sales agreement with TD Cowen (the “Sales Agreement”), as amended pursuant to amendment no. 1 to Sales Agreement dated April 18, 2025 (together the “Agreement”), under which we may from time to time issue and sell American Depositary Shares (ADSs) representing our ordinary shares through TD Cowen in “at-the-market” offerings (“ATM”) for an aggregate offering price of up to $200 million. In the six months ended June 30, 2025 the Company sold 7,713,361 ADSs under the Agreement representing 46,280,166 ordinary shares (including 710,000 ADSs sold on March 31, 2025 representing 4,260,000 ordinary shares issued on April 1, 2025) resulting in net proceeds to the Company of $1,784,061 after deducting commissions payable under the Agreement and issuance costs. As of June 30, 2025, approximately $154,332,614 remained available for sale under the Agreement.

​

​

​

​

​

​

Note 13 – Borrowings

​

On May 14, 2024 (the “Closing Date”), we entered the “Loan Agreement” for a term loan facility of up to $125.0 million (the “Term Loan”), consisting of a term loan advance in the aggregate principal amount equal to $25.0 million on the Closing Date (the “Tranche 1 Advance”), and three further term loan advances available to the Company subject to certain terms and conditions in aggregate principal amounts of $25.0 million, $5.0 million and $30.0 million, respectively, and a term loan advance available in the sole discretion of the lenders and subject to certain terms and conditions in the aggregate principal amount of $40.0 million. The proceeds of the Term Loan will be used solely to repay related fees and expenses in connection with the Loan Agreement and for working capital and general corporate purposes.

​

The Term Loan attracts interest on the outstanding principal in the form of both cash and payment-in-kind (“PIK”) interest. The cash interest rate is the greater of the Prime Rate plus 1.15% and 9.65% and is paid monthly in arrears. The PIK interest rate is 2% per annum. The outstanding principal used to determine both the cash and PIK interest is inclusive of capitalized PIK interest. The Term Loan also attracts an End of Term Charge of 5.85% payable on maturity which is based on the aggregate original principal amount (i.e. excluding capitalized PIK interest).

​

The Term Loan matures on June 1, 2029 and payments are interest-only until the June 1, 2027 (the “Amortization Date”) after which the monthly payments include repayments of both principal and interest. The Amortization Date can be extended if certain criteria are met and the Company chooses to extend the date. The final Term Loan Maturity Date cannot be extended.

​

The Term Loan is secured by a lien on substantially all of Borrower’s existing or after-acquired assets, including intellectual property, subject to customary exceptions. In addition, the Loan Agreement contains customary closing and commitment fees, prepayment fees and provisions, events of default and representations, warranties and affirmative and negative covenants, including a financial covenant requiring the Company to maintain certain levels of cash in accounts subject to a control agreement in favor of Hercules Capital (the “Qualified Cash”) during the period commencing on January 1, 2025 (which initial commencement date is subject to adjustment if certain performance milestones are met) and at all times thereafter, provided that if the Company has achieved certain performance milestones, the amount of Qualified Cash is subject to certain reductions. The Loan Agreement also includes customary events of default, including payment defaults, breaches of covenants following any applicable cure period, the occurrence of certain events that could reasonably be expected to have a “material adverse effect” as set forth in the Loan Agreement, cross acceleration to third-party indebtedness and certain events relating to bankruptcy or insolvency.
​

Each loan tranche has been identified as a separate unit of account within the scope of ASC 835-30 Imputation of interest, with the Tranche 1 Advance constituting a debt instrument and the remaining tranches being loan commitments.

​

On May 14, 2024, the Company drew down the Tranche 1 Advance of $25,000,000 and received proceeds of $24,500,000 after charges payable to Hercules Capital. The Tranche 1 Advance was initially recognized at $24,750,000. On August 13, 2024, the Company drew down the Tranche 2 Advance of $25,000,000 (the “Tranche 2 Advance,” and, together with the Tranche 1 Advance, the “Tranches” and each a “Tranche”) and received proceeds of $25,000,000. The Tranche 2 Advance was initially recognized at $24,750,000.

​

On March 24, 2025, Company entered into an amendment to the Loan Agreement to pre-pay $25.0 million of the loan amount with the accrued interest up to the date of such pre-payment. The Company will pay an end of term charge on such pre-paid amount of 5.85% as previously provided in the Loan Agreement, such end of term charge being payable upon maturity or repayment of all obligations under the Loan Agreement. The Company made a $25.4 million pre-payment on March 26, 2025.

​

20

Table of Contents

The pre-payment was treated as a modification of the Term Loan. The terms of the modified Term Loan are not substantially different to the terms of the original Term Loan, therefore the Term Loan continued to be recognized and a new effective interest rate was calculated based on the carrying amount of the original Term Loan immediately before the modification and the revised future cash flows. As a result of the pre-payment, a loss of $220,000 was recognized relating to the portion of the unamortized discount that was deemed to have been disposed of.

​

At June 30, 2025 the face value of the outstanding principal (including capitalized PIK interest) on the Term Loan was $25,451,000, less unamortized discount of $216,000 and plus accreted value of the End of Term Charge of $440,000 based on the imputed interest rate of 14.8%. No qualifying debt issuance costs were incurred in relation to either Tranche.

​

At June 30, 2025, the fair value of the Term Loan was $26,299,000. The fair value of the Term Loan is a Level 2 measurement based on observable inputs including the contractual term of the instrument and market interest rates, notably the Prime Rate.

​

The aggregate maturity of the term loan for the next five years from June 30, 2025 is as follows:

​

​	​	​	​
​		Maturity
2025	​	$	—
2026	​		—
2027	​		6,388
2028	​		11,808
2029	​		8,872
Total principal repayments	​	$	27,068
​	​	​	​
Composition of principal repayments	​	​	​
Original principal	​	$	25,000
Capitalized PIK interest	​	​	2,068
Total principal repayments	​	$	27,068

​

The payments included in the table include capitalized PIK interest, as this forms part of the principal balance to be repaid once incurred. Payments relating to cash interest and the End of Term Charge are excluded as they do not constitute repayments of the principal.

​

On July 31, 2025, all indebtedness to Hercules was repaid and satisfied, and the Loan Agreement was irrevocably terminated on that date – see note 17 for further details.

​

​

Note 14 – Segment reporting

​

The Company has one reportable segment relating to the research, development and commercialization of its novel cell therapies. The segment derives its current revenues from research and development collaborations.

​

The Company’s Chief Operating Decision Maker (the “CODM”), its Chief Executive Officer and the senior leadership team (comprising the Executive Team members and two senior vice presidents), manages the Company’s operations on an integrated basis for the purposes of allocating resources. When evaluating the Company’s financial performance, the CODM regularly reviews total revenues, total expenses and expenses by function and the CODM makes decisions using this information on a global basis.

​

21

Table of Contents

The table below is a summary of the segment profit or loss, including significant segment expenses (in thousands):

​

​	​	​	​	​	​	​	​	​	​	​	​
​	Three months ended					​	Six months ended
​	June 30,					​	June 30,
​	2025			2024		​	2025			2024
Revenue	$	13,677	​	$	128,231	​	$	20,962	​	$	133,909
Less:	​	​	​	​	​	​	​	​	​	​	​
Cost of goods sold	​	(2,501)	​	​	—	​	​	(3,380)	​	​	0
Research	​	488	​	​	(3,830)	​	​	(1,620)	​	​	(7,438)
CMC and Quality	​	(10,510)	​	​	(14,159)	​	​	(22,595)	​	​	(28,933)
Biomarkers	​	(1,505)	​	​	(2,495)	​	​	(2,727)	​	​	(5,286)
Development and Compliance	​	(9,552)	​	​	(12,611)	​	​	(20,102)	​	​	(27,486)
Infrastructure management and Facilities	​	(6,977)	​	​	(7,749)	​	​	(14,316)	​	​	(15,828)
Commercial and Commercial planning	​	(3,946)	​	​	(2,561)	​	​	(8,344)	​	​	(6,445)
Support and corporate functions	​	(10,172)	​	​	(9,139)	​	​	(22,811)	​	​	(21,073)
Other segment income/(expenses), net(a)	​	710	​	​	(6,987)	​	​	(1,088)	​	​	(1,981)
Total operating expenses	​	(43,965)	​	​	(59,531)	​	​	(96,983)	​	​	(114,470)
Operating (loss)/profit	​	(30,288)	​	​	68,700	​	​	(76,021)	​	​	19,439
​	​	​	​	​	​	​	​	​	​	​	​
Interest income	​	233	​	​	1,376	​	​	1,143	​	​	2,721
Interest expense	​	(962)	​	​	(526)	​	​	(2,843)	​	​	(526)
Other income (expense), net	​	1,289	​	​	497	​	​	984	​	​	436
Income tax expense	​	(612)	​	​	(526)	​	​	(1,187)	​	​	(1,052)
Segment and consolidated net (loss)/profit	$	(30,340)	​	$	69,521	​	$	(77,924)	​	$	21,018

​

^(a)Other segment income/(expenses) for the six months ended June 30, 2025 includes reimbursements receivable for research and development tax and expenditure credits of $3,901,000 (2024: $5,879,000), depreciation of $4,620,000 (2024: $5,457,000), amortization of $355,000 (2024: $115,000) and share-based compensation expenses (see Note 11).

​

The main measure of assets reviewed by the CODM is the Company’s cash and cash equivalents and marketable securities. Total cash outflows relating to additions to long-lived assets have been disclosed in the Consolidated Statements of Cash Flows as cash outflows from investing activities.

​

​

Note 15 – Inventories

​

On August 1, 2024, the Company received FDA approval for TECELRA for the treatment of advanced MAGE-A4+ synovial sarcoma in adults with certain HLA types who have received prior chemotherapy, and commenced capitalization of inventory from this date.

​

Prior to August 1, 2024, regulatory approval and subsequent commercialization of TECELRA, and thus the possibility of future economic benefits from TECELRA sales, were not considered probable and inventory-related costs were expensed as incurred; as such, the inventory recognized on the balance sheet does not included any pre-launch inventory. At June 30, 2025, the gross value of pre-launch inventory held but not recognized was $3,724,000, which includes inventory that could be used for either clinical or commercial purposes.

​

The components of inventory are as follows:

​

​	​	​	​	​	​	​
​	​	June 30,		​	December 31,
​		2025			2024
Raw materials	​	$	10,761	​	$	7,236
Work-in-progress	​	​	160	​	​	84
Finished goods	​		490	​		—
Total inventory, net	​	$	11,411	​	$	7,320

​

22

Table of Contents

​

Note 16 – Contingencies & Provisions

​

MD Anderson Litigation

​

On July 16, 2025, the Company entered into a settlement and release agreement (the “Settlement Agreement”) with The University of Texas M.D. Anderson Cancer Center (“MD Anderson”). As previously disclosed in the Company’s 2024 Annual Report and its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2025, MD Anderson served litigation in the District Court of Harris County against the Company. The litigation relates to a strategic alliance agreement between MD Anderson and the Company dated September 23, 2016 (the “Alliance Agreement”). MD Anderson claimed damages of over $21 million (excluding legal fees and costs of court) caused by the Company’s alleged breach of contract. MD Anderson also brought an alternative action for quantum meruit, promissory estoppel, unjust enrichment, negligent misrepresentation and reformation.

Solely to avoid the costs, risks and uncertainties inherent in litigation, the Company and MD Anderson entered into the Settlement Agreement. The Settlement Agreement provides for the release and dismissal of all claims relating to the Alliance Agreement, with dismissal being dependent on receipt of full payment of settlement sums by MD Anderson. The financial payment obligations under the Settlement Agreement are not considered by the Company to be material to the Company and the Company does not believe that payment under the Settlement Agreement will have a material adverse effect on the Company’s financial position or results of operations.

​

​

​

2024-2025 Restructuring program

​

Reduction in workforce

​

On November 13, 2024 the Company announced a restructuring plan that aims to prioritize its commercial sarcoma franchise and certain research and development programs. As part of this restructuring, the Company is executing against a plan to achieve an approximately 33% reduction in workforce. The majority of the reduction in workforce was completed during the first quarter of 2025.

​

The redundancy process was initiated in the fourth quarter of 2024, with most employees leaving in the first quarter of 2025. Employees in certain roles will be retained during a transition period beyond the first quarter of 2025. Once the redundancy program is completed, it will result in a reduction of approximately 29% of global headcount.

​

The redundancy packages to be paid to departing staff comprise a combination of contractual termination benefits, relating to payments that arise from terms of employment contracts and statutory redundancy pay, and one-time employee termination benefits that were provided or enhanced specifically for this redundancy process. Due to the structure of the redundancy scheme and the different employment regulations affecting the Company’s U.K. and U.S. employees, some of the expense associated with the one-time employee termination benefits was recognized over the remaining period of employee service to be rendered. Contractual termination benefits and other one-time employee termination benefits were expensed and recognized in the year ended December 31, 2024. All expenses have been recognized in Selling, general and administrative expenses in the Statement of Operations.

​

The amounts expected to be incurred in relation to the redundancy program were as follows:

​

​	​	​	​	​	​	​	​	​	​
​	​	​		​			​
​	​	​	Contractual termination benefits	​	​	One-time employee termination benefits	​	​	Total restructuring cost
Cumulative amount incurred to, December 31, 2024	​	$	4,102	​	$	1,809	​	$	5,911
Amount incurred in six months ended June 30,2025	​	​	321	​	​	1,914	​	​	2,235
Remaining amount expected to be incurred in future periods	​	​	—	​	​	240	​	​	240
Total amount expected to be incurred	​	$	4,423	​	$	3,963	​	$	8,386

​

​

​ ​ ​ ​ ​ ​ ​ ​ ​ ​

​

23

Table of Contents

The table below is a summary of the changes in the restructuring provision in the consolidated balance sheets in the six months ended June 30, 2025:

​

​	​	​	​	​	​	​	​	​	​
​	​	​		​			​

​

​	​	​	​	​	​	​	​	​	​
​	​	​		​			​
​	​	​	Contractual termination benefits	​	​	One-time employee termination benefits	​	​	Total restructuring provision
​		​		​			​
Liability at December 31, 2024	​	$	4,102	​	$	1,809	​	$	5,911
Costs incurred and charged to selling, general and administrative expenses	​	​	401	​	​	1,777	​	​	2,178
Adjustment to liability	​	​	(80)	​	​	137	​	​	57
Amounts utilised during the period	​	​	(3,099)	​	​	(2,922)	​	​	(6,021)
Effects of foreign exchange rates	​	​	149	​	​	81	​	​	230
Liability at June 30, 2025	​	$	1,473	​	$	882	​	$	2,355

​

​

​

​

Note 17 – Subsequent events

​

On July 16, 2025, the Company entered into the Settlement Agreement with MD Anderson. See Note 16 for futher information.

On July 27, 2025, the Company entered into the Asset Purchase Agreement. Pursuant to the terms set forth in the Asset Purchase Agreement, Adaptimmune agreed to sell to USWM CT, LLC (“Purchaser”, and together with US WorldMeds Partners, LLC, “US WorldMeds”) the assets and rights related to Adaptimmune’s TECELRA, letecel, afami-cel and uza-cel cell therapies (the “Products”), and Purchaser agreed to assume certain liabilities related to the Products (the “Transaction”). The Company also agreed to transfer to Purchaser specified intellectual property, product rights, regulatory authorizations, contracts, equipment, inventory, and other related assets. In connection with the Transaction, US WorldMeds intends to offer employment to approximately half of the Company’s workforce.

Upon consummation of the Transaction, Purchaser paid $55.0 million in cash, a portion of which Purchaser paid directly to Hercules to repay all of the Company’s indebtedness under the Loan Agreement. In addition, Purchaser has agreed to make future payments to the Company of up to $30.0 million in cash upon the achievement of certain regulatory and commercial milestones related to the Products within certain specified time periods and subject to certain specified reductions, including:

- $5.0 million upon acceptance for review by the FDA of all modules of a Biologics License Application for lete-cel;

- $10.0 million upon receipt of full FDA marketing approval of lete-cel for biomarker-eligible patients with advanced or metastatic synovial sarcoma and myxoid/round cell liposarcoma;

- up to $5.0 million in the aggregate, payable in two equal installments of $2.5 million each if net product revenue for TECELRA in the United States equal to or exceeding $18.0 million in any calendar quarter; and

- $10.0 million if net product revenue for TECELRA and lete-cel in the United States equal to or exceeding $200.0 million.

The Transaction was completed and funds received from Purchaser on July 31, 2025.

​

24

Table of Contents

At the same time and in connection with the consummation of the Transaction Hercules was paid an amount equal to approximately $29.1 million (the “Payoff Amount”) in satisfaction of all indebtedness owed to Hercules, including principal, accrued and unpaid interest, fees, costs and expenses payable under the Loan Agreement. The Payoff Amount included (a) approximately $2.9 million as an end-of-term fee and (b) approximately $0.5 million as a pre-payment fee. Upon receipt of the Payoff Amount, Hercules discharged in full all of the Company’s and its subsidiaries’ obligations, covenants, debts and liabilities under the Loan Agreement and released all liens and security interests granted to Hercules to secure the obligations under the Loan Agreement. In connection with the Transaction, the Company also entered into (i) a license agreement, pursuant to which,among other things, Purchaser will be exclusively licensed residual intellectual property rights necessary for the manufacture and commercialization of the Products and (ii) a transition services agreement, pursuant to which Adaptimmune will agree to provide certain transition services to facilitate the transfer of purchased assets to US WorldMeds. Transition services will end, on a transition service-by-transition service basis, upon the earlier of the end of the term specified for each transition service and June 30, 2026.

​

The Loan Agreement was irrevocably terminated as of July 31, 2025.

​

On July 28, 2025, the Company also announced a restructuring in connection with the Transaction. Following consummation of the Transaction the Company plans to further reduce its remaining workforce by approximately 62%. The planned reduction in workforce is subject to consultation with employee representatives in the United Kingdom regarding the plan. The Company anticipates that the majority of the reduction in workforce will be completed during the third quarter of 2025. As a result of these actions, the Company expects to incur approximately $7 to $8 million in pre-tax costs, relating to employee severance and other employee related costs. These estimates are subject to certain assumptions and actual results may differ. As part of the restructuring, Elliot Norry, our Chief Medical Officer, and Cintia Piccina, our Chief Commercial Officer, ceased to be employed by Adaptimmune LLC as of August 8, 2025 and Joanna Brewer, our Chief Scientific Officer, will cease to be employed by Adaptimmune Limited as of August 31, 2025.

​

​

​

​

​

​

​

​

​

​

​

​

25

Table of Contents

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

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited consolidated financial statements and related notes appearing elsewhere in this Quarterly Report and the audited consolidated financial statements and notes thereto and management’s discussion and analysis of financial condition and results of operations for the year ended December 31, 2024, included in our Annual Report on Form 10-K that was filed with the SEC on March 24, 2025. Some of the information contained in this discussion and analysis or set forth elsewhere in this Quarterly Report, including information with respect to our plans and strategy for our business, includes forward-looking statements that involve risks and uncertainties. As a result of many factors, including those factors set forth in the “Risk Factors” section of this Quarterly Report and our Annual Report on Form 10-K for the year ended December 31, 2024, our actual results could differ materially from the results described in, or implied by, these forward-looking statements.

Overview

​

We are a commercial-stage biopharmaceutical company working to redefine the treatment of solid tumor cancers with cell therapies. With the approval by the U.S. Food and Drug Administration (“FDA”) of our first biologics license application (“BLA”) for TECELRA® (afamitresgene autoleucel) (“TECELRA”), which is the first engineered T-cell therapy for the treatment of a solid tumor cancer approved in the U.S.

​

TECELRA is a genetically modified autologous T-cell immunotherapy indicated for the treatment of adults with unresectable or metastatic synovial sarcoma who have received prior chemotherapy, are HLA-A*02:01P, -A*02:02P, -A*02:03P, or -A*02:06P positive and whose tumor expresses the MAGE-A4 antigen as determined by FDA-approved or cleared companion diagnostic devices. This indication is approved under the FDA’s accelerated approval based on overall response rate (“ORR”) and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefits in a confirmatory trial.

​

We have been planning commercial launch for our second T-cell immunotherapy, letetresgene autoleucel (“lete-cel”), for people with synovial sarcoma and myxoid liposarcoma in 2026. In addition to our commercial sarcoma franchise we remain committed to our collaboration with Galapagos which uses our uzatresgene autoleucel (“uza-cel”) candidate manufactured using the Galapagos manufacturing process.

​

On July 27, 2025, we entered into an asset purchase agreement (the “Asset Purchase Agreement”) with USWM CT, LLC (“Purchaser”), a subsidiary of US WorldMeds Partners, LLC (together with Purchaser, “US WorldMeds”). Pursuant to the terms set forth in the Asset Purchase Agreement, we agreed to sell to Purchaser the assets and rights related to Adaptimmune’s TECELRA, letecel, afami-cel and uza-cel cell therapies (the “Products”), and Purchaser agreed to assume certain liabilities related to the Products (the “Transaction”). We also agreed to transfer to Purchaser specified intellectual property, product rights, regulatory authorizations, contracts, equipment, inventory, and other related assets. We continue to look for strategic options in relation to our pre-clinical assets and in particular our PRAME directed T-cell therapy and our CD70 directed TRuC therapy. In connection with the transaction, US WorldMeds intends to offer employment to approximately half of the Company’s existing employees. Further detail can be found in Note 17 to the financial statements.

​

TECELRA and Commercialization

​

We have been focused on the commercialization of TECELRA for the treatment of advanced synovial sarcoma and for which we received FDA approval on August 1, 2024. Commercialization of TECELRA will now pass to US WorldMeds and we will work with them to ensure a smooth transition.

​

Letetresgene autoleucel (“lete-cel”)

​

Lete-cel targets the NY-ESO antigen and has been in clinical trials (the IGNYTE-ESO trial) for people with synovial sarcoma and myxoid liposarcoma. It is the second product in our sarcoma franchise. Final data for the IGNYTE-ESO trial were reported at the Connective Tissue Oncology Society Annual Meeting (“CTOS”) in November 2024. In January 2025, lete-cel was granted breakthrough therapy designation by the U.S. FDA for the treatment of patients with unresectable or metastatic myxoid liposarcoma who have received prior anthracycline-based chemotherapy, are positive for HLA-A*02:01, HLA-A*02:05, or HLA-A*02:06, and whose tumor expresses the

26

Table of Contents

NY-ESO-1 antigen. The development of lete-cel will now pass to US WorldMeds and we will work with them on the anticipated BLA filing.

​

Clinical Programs

​

We have a pediatric trial ongoing in the U.S. in tumors expressing the MAGE-A4 antigen.

We anticipated filing a clinical trial authorization for a Phase 1 trial in head and neck cancer in collaboration with Galapagos during 2025. The conduct of the Phase 1 trial will now pass to US WorldMeds as part of the Transaction and we will work with them to ensure a smooth transition.

Preclinical programs

Our preclinical pipeline is focused on the development of T-cell therapies directed to PRAME (ADP-600) and CD70 (ADP-520). We have paused spend on these preclinical programs whilst we look for strategic options for these pre-clinical assets.

● PRAME is highly expressed across a broad range of solid tumors including ovarian, endometrial, lung and breast cancers. We are developing TCR T-cells directed to PRAME, with the initial candidate (ADP-600) currently in preclinical testing and next-generation candidates being developed over the longer term. ADP-600 has demonstrated high potency towards PRAME-positive tumor cells in pre-clinical testing.

​

● The CD70 program targets the CD70 antigen which is expressed across a range of hematological malignancies (acute myeloid leukemia and lymphoma) and solid tumors (renal cell carcinoma). We are using TRuC technology to develop a T-cell therapy (ADP-520) against CD70, with membrane bound IL-15 to enhance persistence. ADP-520 is currently in pre-clinical testing. The TRuC technology combines the targeting of CAR-T cells with T-cell TCR signaling.

​

​

Corporate News

​

On July 27, 2025, the Company entered into the Asset Purchase Agreement. Pursuant to the terms set forth in the Asset Purchase Agreement, Adaptimmune agreed to sell to Purchaser the assets and rights related to Adaptimmune’s TECELRA, letecel, afami-cel and uza-cel cell therapies, and Purchaser agreed to assume certain liabilities related to the Products. The Transaction was completed on July 31, 2025.

At the same time and in connection with the consummation of the Asset Purchase Agreement, Hercules Capital, Inc. (“Hercules”) was paid an amount equal to approximately $29.1 million in satisfaction of all indebtedness owed to Hercules pursuant to the Loan and Security Agreement (the “Loan Agreement”), dated May 14, 2024, by and among Adaptimmune, Hercules and the other parties thereto. The Loan Agreement was irrevocably terminated as of July 31, 2025.

​

On July 28, 2025, the Company also announced a restructuring in connection with the Transaction. Following consummation of the Transaction, the Company plans to further reduce its remaining workforce by approximately 62%. The Company anticipates that the majority of the reduction in workforce will be completed during the third quarter of 2025. As a result of these actions, the Company expects to incur approximately $7 to $8 million in pre-tax costs, relating to employee severance and other employee related expenses. The Company expects to incur the majority of such costs during the third quarter of 2025. These estimates are subject to certain assumptions and actual results may differ. As part of the restructuring, Elliot Norry, our Chief Medical Officer, and Cintia Piccina, our Chief Commercial Officer, ceased to be employed by Adaptimmune LLC as of August 8, 2025 and Joanna Brewer, our Chief Scientific Officer, will cease to be employed by Adaptimmune Limited as of August 31, 2025. As previously disclosed, Gavin Wood, our Chief Financial Officer, will cease to be employed by Adaptimmune Limited as of August 31, 2025.

​

27

Table of Contents

Financial Operations Overview

Revenue

After, the Company received FDA approval on August 1, 2024, for TECELRA for the treatment of advanced MAGE-A4+ synovial sarcoma in adults with certain HLA types who have received prior chemotherapy, the Company started generating product revenue from sales of TECELRA. There are 20 Authorized Treatment Centers (“ATCs”) available to initiate the treatment journey for the patients.

The Company generates development revenue from collaboration agreements with customers. The Company had two development revenue-generating customers in the three and six months ended June 30, 2025 and three revenue generating contracts in the three and six months ended June 30, 2024, respectively: the Galapagos Collaboration Agreement (effective from May 30, 2024), the GSK Termination and Transfer Agreement (effective from April 11, 2023) and the Genentech Collaboration Agreement (terminated September 23, 2024).

​

The Galapagos Collaboration and Exclusive License Agreement

On May 30, 2024, the Company entered into the Galapagos Collaboration Agreement. The Galapagos Collaboration Agreement includes an option for Galapagos to exclusively license the TCR T-cell therapy candidate uza-cel, manufactured on Galapagos’s decentralized manufacturing platform, in head and neck cancer and potential future solid tumor indications. Under the Galapagos Collaboration Agreement, we will conduct a clinical proof-of-concept trial to evaluate the safety and efficacy of uza-cel produced on Galapagos’ decentralized manufacturing platform in patients with head and neck cancer.

This collaboration includes an initial payments of $100 million, comprised of $70 million upfront and $30 million of research and development funding, option exercise fees of up to $100 million (the amount depending on the number of indications in relation to which the option is exercised), additional development and sales milestone payments of up to a maximum of $465 million, plus tiered royalties on net sales. The $70 million upfront payment and $15 million of upfront research and development funding was received in June 2024.

The Company has identified a performance obligation relating to the various activities required to complete the POC trial and a material right associated with the exclusive license option. The Company expects to satisfy the POC Trial obligation over time over the period that the trial is completed, based on an estimate of the percentage of completion of the trial determined based on the costs incurred on the trial as a percentage of the total expected costs. The revenue allocated to the material right associated with the exclusive licence option will be recognized from the point that the option is either exercised and control of the license has passed to Galapagos or the option lapses.

The GSK Termination and Transfer Agreement

On April 11, 2023, the Company announced its entry into the Termination and Transfer Agreement with GSK regarding the return to the Company of rights and materials comprised within the PRAME and NY-ESO cell therapy programs. The parties will work collaboratively to ensure continuity for patients in ongoing lete-cel clinical trials forming part of the NY-ESO cell therapy program.

As part of the Termination and Transfer Agreement, sponsorship of the ongoing IGNYTE and LTFU trials relating to the NY-ESO cell therapy program will transfer to the Company. In return for this, the Company received an upfront payment of £7.5 million in June 2023 following the execution of the Termination and Transfer Agreement and further milestone payments of £3 million, £12 million, £6 million and £1.5 million to the Company in September and December 2023 and June and August 2024, respectively. No further payments are due from GSK under the Termination and Transfer Agreement.

The Company has identified the following performance obligations under the Termination and Transfer Agreement: (i) to take over sponsorship and complete the IGNYTE trial and (ii) to take over sponsorship and complete the LTFU trial. The revenue allocated to both obligations is recognized over time from the point that sponsorship of the active trials that make up the trial transfer, based on the number of patients transferred and still actively enrolled to date on the trial at a given period-end relative to the total estimated periods of active patient enrollment over the estimated duration of the trial.

28

Table of Contents

The Genentech Collaboration Agreement

On September 3, 2021, Adaptimmune Limited, a wholly-owned subsidiary of the Company, entered into the Genentech Collaboration Agreement. The collaboration has two components:

1) development of allogeneic T-cell therapies for up to five shared cancer targets; and

2) development of personalized allogeneic T-cell therapies utilizing αβ T-cell receptors (TCRs) isolated from a patient, with such therapies being administered to the same patient.

​

The parties would collaborate to perform a research program, initially during an eight-year period (which may be extended for up to two additional two-year terms at Genentech’s election upon payment of an extension fee for each two-year term), to develop the cell therapies, following which Genentech would determine whether to further develop and commercialize such therapies. The Company received an upfront payment of $150 million in October 2021 and milestone payments of $20 million and $15 million in December 2022 and 2023, respectively.

The Company identified the following performance obligations under the Genentech Collaboration Agreement: (i) research services and rights granted under the licenses for each of the initial “off-the-shelf” collaboration targets, (ii) research services and rights granted under the licenses for the personalized therapies, (iii) material rights relating to the option to designate additional “off-the-shelf” collaboration targets and (iv) material rights relating to the two options to extend the research term. The revenue allocated to the initial “off-the-shelf” collaboration targets and the personalized therapies was recognized as development progressed. The revenue allocated to the material rights to designate additional ‘off-the-shelf’ collaboration targets would have been recognized from the point that the options were exercised and then as development progressed, in line with the initial “off-the-shelf” collaboration targets, or at the point in time that the rights expired. The revenue from the material rights to extend the research term would have been recognized from the point that the options were exercised and then over the period of the extension, or at the point in time that the options expired.

On April 12, 2024, we announced the termination of the Genentech Collaboration Agreement. The termination was accounted for as a contract modification on a cumulative catch-up basis. The termination did not change the nature the performance obligations identified but resulted in a reduction of the transaction price as the additional payments and variable consideration that would have been due in periods after October 7, 2024 will now never be received. The termination resulted in a cumulative catch-up adjustment to revenue recognized at the date of the termination of $101.3 million.

On September 23, 2024, Adaptimmune Limited entered into a Mutual Release Agreement with Genentech. The Mutual Release Agreement, among other things, resolved and released each party from any and all past, present and future disputes, claims, demands and causes of action, whether known or unknown, related to the Genentech Collaboration Agreement in any way. Under the terms of the Mutual Release Agreement, Genentech will pay $12.5 million, upon which the Genentech Collaboration Agreement will be terminated. The Mutual Release Agreement was effective immediately as of September 23, 2024. The Mutual Release Agreement resulted in all remaining performance obligations being fully satisfied and the remaining deferred revenue and the additional payment were both recognized as total revenue of $37.8 million in the third quarter of 2024.

Cost of Goods Sold

Cost of goods sold represents the costs involved in the manufacture of our commercial products including raw materials, internal manufacturing and staff costs including a share of overheads and other costs incurred in bringing inventories to their existing condition and location prior to sale. Cost of goods sold also includes the costs for excess or obsolete inventory.

Research and Development Expenses

Research and development expenditures are expensed as incurred. Research and development expenses consist principally of the following:

​

● salaries for research and development staff and related expenses, including benefits;

● costs for production of preclinical compounds and drug substances by contract manufacturers;

29

Table of Contents

● fees and other costs paid to contract research organizations in connection with additional preclinical testing and the performance of clinical trials;

● costs associated with the development of a process to manufacture and supply our lentiviral vector and cell therapies for use in clinical trials;

● costs to develop manufacturing capability at our U.S. facility for manufacture of cell therapies for use in clinical trials;

● costs relating to facilities, materials and equipment used in research and development;

● costs of acquired or in-licensed research and development which does not have alternative future use;

● costs of developing assays and diagnostics;

● an allocation of indirect costs clearly related to research and development;

● amortization and depreciation of property, plant and equipment and intangible assets used to develop our cells therapies; and

● share-based compensation expenses.

These expenses are partially offset by:

● reimbursable tax and expenditure credits from the U.K. government.

As a company that carries out extensive research and development activities, we benefit from the U.K. merged research and development credit regime (“Merged RDEC Scheme”), whereby our principal research subsidiary company, Adaptimmune Limited, is able to surrender the trading losses that arise from its research and development activities for a payable tax credit of up to approximately 16.2% of eligible research and development expenditures. Qualifying expenditures largely comprise employment costs for research staff, consumables and certain internal overhead costs incurred as part of research projects. Subcontracted research expenditures are eligible for a cash rebate of up to approximately 10.5%. A large proportion of costs in relation to our pipeline research, clinical trials management and manufacturing development activities, all of which are being carried out by Adaptimmune Limited, are eligible for inclusion within these tax credit cash rebate claims.

The Merged RDEC scheme includes an exception for R&D Intensive SMEs. For entities which qualify as R&D Intensive SMEs, a higher effective cash tax benefit of 27% will be available. The Company does not expect to qualify as an R&D Intensive SME for the year ended December 31, 2025.

Prior to introduction of the Merged RDEC Scheme on April 1, 2024 the Company benefitted from the U.K. research and development tax credit regime for small and medium sized companies (“SME R&D Tax Credit Scheme”) and, for certain expenditures that were not qualifying expenditures under the SME R&D Tax Credit Scheme, the U.K. research and development expenditure credit scheme (the “RDEC Scheme”). These schemes resulted in payable tax credits of 18.6% and 15%, respectively, for the year ended December 31, 2024.

Our research and development expenses may vary substantially from period to period based on the timing of our research and development activities, which depends upon the timing of initiation of clinical trials and the rate of enrollment of patients in clinical trials. The duration, costs, and timing of clinical trials and development of our cell therapies will depend on a variety of factors, including:

● the scope, rate of progress, and expense of our ongoing as well as any additional clinical trials and other research and development activities;

● uncertainties in clinical trial enrollment rates;

● future clinical trial results;

● significant and changing government regulation;

30

Table of Contents

● the timing and receipt of any regulatory approvals; and

● supply and manufacture of lentiviral vector and cell therapies for clinical trials.

A change in the outcome of any of these variables may significantly change the costs and timing associated with the development of that cell therapy. For example, if the FDA, or another regulatory authority, requires us to conduct clinical trials beyond those that we currently anticipate will be required for regulatory approval, or if we experience significant delays in enrollment in any of our clinical trials, we could be required to expend significant additional financial resources and time on the completion of clinical development.

Selling, General and Administrative Expenses

Our general and administrative expenses consist principally of:

● salaries for employees other than research and development staff, including benefits;

● provisions for restructuring activity;

● business development expenses, including travel expenses;

● professional fees for auditors, lawyers and other consulting expenses;

● selling and other costs relating to our commercial product;

● costs of facilities, communication, and office expenses;

● cost of establishing commercial operations;

● information technology expenses;

● amortization and depreciation of property, plant and equipment and intangible assets not related to cost of goods sold or research and development activities; and

● share-based compensation expenses.

Interest Income

Interest income primarily comprises interest on cash, cash equivalents and marketable securities.

Interest Expense

Interest expense primarily comprises loan interest on the Hercules Capital loan facility.

Other Income (Expense), Net

Other income (expense), net primarily comprises foreign exchange gains (losses). We are exposed to foreign exchange rate risk because we currently operate facilities in the U.K. and U.S. Our expenses are generally denominated in the currency in which our operations are located, which are the U.K. and the U.S. However, our U.K.-based subsidiary incurs significant research and development costs in U.S. dollars and, to a lesser extent, Euros. Our U.K. subsidiary has an intercompany loan balance in U.S. dollars payable to the Company. Since July 1, 2019, the intercompany loan has been considered as being a long-term investment as repayment is not planned or anticipated in the foreseeable future. It is the Company’s intent not to request payment of the intercompany loan for the foreseeable future. The foreign exchange gains or losses arising on the revaluation of intercompany loans of a long-term investment nature are reported within other comprehensive (loss) income, net of tax.

Our results of operations and cash flows will be subject to fluctuations due to changes in foreign currency exchange rates, which could harm our business in the future. We seek to minimize this exposure by maintaining currency cash balances at levels appropriate to

31

Table of Contents

meet forthcoming expenditure in U.S. dollars and pounds sterling. To date, we have not used hedging contracts to manage exchange rate exposure, although we may do so in the future.

In addition to currency fluctuations, adverse macroeconomic conditions, including inflation, slower growth or recession, new or increased tariffs, changes to fiscal and monetary policy, tighter credit, and higher interest rates, could materially adversely affect the Company by, for example, driving higher input costs and/or impacting the Company’s ability to raise future financing.

Taxation

We are subject to corporate taxation in the U.K. and the U.S. We typically incur tax losses and tax credit carryforwards in the U.K. No net deferred tax assets are recognized on our U.K. losses and tax credit carryforwards because there is currently no indication that we will make sufficient taxable profits to utilize these tax losses and tax credit carryforwards. The main rate of U.K. corporation tax is 25% and the Small Profit rate of U.K. corporation tax is 19%, for the year ended December 31, 2025.

​

We benefit from reimbursable tax credits in the U.K. through the Merged RDEC Scheme and previously benefitted from the SME R&D Tax Credit Scheme and the RDEC Scheme, all of which are presented as a deduction to research and development expenditure.

​

Our Philadealphia-based subsidiary in the U.S., Adaptimmune LLC, has generated taxable profits due to a Service Agreement between our U.S. and U.K. operating subsidiaries and is subject to U.S. federal corporate income tax of 21%. The Company also benefits from the U.S Research Tax Credit and Orphan Drug Credit.

TCR² has incurred net losses since acquisition and generates research and development tax credits. TCR²’s operating loss and tax credit carryforwards and other tax attributes are reduced by a valuation allowance to the amount supported by reversing taxable temporary differences because there is currently no indication that we will make sufficient taxable profits to utilize these deferred tax assets.

In the future, if we generate taxable income in the U.K., we may benefit from the U.K.’s “patent box” regime, which would allow certain profits attributable to revenues from patented products to be taxed at a rate of 10%. As we have many different patents covering our products, future upfront fees, milestone fees, product revenues, and royalties may be taxed at this favorably low tax rate.

U.K. Value Added Tax (“VAT”) is charged on all qualifying goods and services by VAT-registered businesses. An amount of 20% of the value of the goods or services is added to all relevant sales invoices and is payable to the U.K. tax authorities. Similarly, VAT paid on purchase invoices paid by Adaptimmune Limited and the Company is reclaimable from the U.K. tax authorities.

Critical Accounting Policies and Significant Judgments and Estimates

The preparation of our unaudited condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and the revenues and expenses incurred during the reported periods. We base our estimates on historical experience and on various other factors that we believe are relevant under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. The accounting policies considered to be critical to the judgments and estimates used in the preparation of our financial statements are disclosed in the Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our 2024 Annual Report.

No accounting policies or estimates were considered to be critical to the judgements and estimates used in the preparation of our financial statements for the six months ended June 30, 2025.

​

32

Table of Contents

Results of Operations

​

Comparison of three months ended June 30, 2025 and 2024

The following table summarizes the results of our operations for the three months ended June 30, 2025 and 2024, together with the changes to those items (in thousands):

​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	Three months ended					​	​	​	​	​
​	​	June 30,					​	​	​		​
​		2025			2024			Increase/decrease
Product revenue, net	​	$	11,078	​	$	—	​	$	11,078	​	—	%
Development revenue	​	​	2,599	​	​	128,231	​	​	(125,632)	​	(98)	%
Revenue	​	$	13,677	​	$	128,231	​	$	(114,554)		(89)	%
Cost of goods sold	​	​	(2,501)	​	​	—	​	​	(2,501)		—	%
Research and development expenses	​		(22,979)	​		(40,448)	​		17,469		(43)	%
Selling, general and administrative expenses	​		(18,485)	​		(19,083)	​		598		(3)	%
Total operating expenses	​		(43,965)	​		(59,531)	​		15,566		(26)	%
(Loss)/profit from operations	​		(30,288)	​		68,700	​		(98,988)		(144)	%
Interest income	​		233	​		1,376	​		(1,143)		(83)	%
Interest expense	​	​	(962)	​	​	(526)	​	​	(436)	​	83	%
Other (expense) income, net	​		1,289	​		497	​		792		159	%
(Loss)/profit before income tax expense	​		(29,728)	​		70,047	​		(99,775)		(142)	%
Income tax expense	​		(612)	​		(526)	​		(86)		16	%
Net (loss)/profit attributable to ordinary shareholders	​	$	(30,340)	​	$	69,521	​	$	(99,861)		(144)	%

​

Revenue

The revenue recognized in the three months ended June 30, 2025 relates to TECELRA product sales and development revenue under the Galapagos Collaboration Agreement and the GSK Termination and Transfer Agreement.

Revenue decreased by $114.6 million to $13.7 million in the three months ended June 30, 2025 compared to $128.2 million for the three months ended June 30, 2024. Revenue from development activities decreased by 98% for the three months ended June 30, 2025, compared to the same period in 2024. This decline was primarily due to the termination of the Genentech collaboration in April 2024 which resulted in the recognition of a cumulative catch-up adjustment of $101.3 million for the three months ended June 30, 2024. The product revenue has increased due to product sales commencing following the FDA approval of TECELRA on August 1, 2024.

Research and Development Expenses

Research and development expenses decreased by 43% to $23.0 million for the three months ended June 30, 2025 from $40.4 million for the three months ended June 30, 2024.

Our research and development expenses comprise the following (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

​

​

​

​

​

​

June 30,

​

​

​

​

​

2025

2024

Increase/decrease

​

Salaries, materials, equipment, depreciation of property, plant and equipment and other employee-related costs(1)

​

$

14,347

​

$

25,089

​

$

(10,742)

​

(43)

%

Subcontracted expenditure

​

9,710

​

13,962

​

(4,252)

​

(30)

%

Manufacturing facility expenditure

​

1,281

​

2,772

​

(1,491)

​

(54)

%

Share-based compensation expense

​

305

​

994

​

(689)

​

(69)

%

In-process research and development costs

​

(1)

​

11

​

(12)

​

(109)

%

Reimbursements receivable for research and development tax and expenditure credits

​

(2,663)

​

(2,380)

​

(283)

​

12

%

​

​

$

22,979

​

$

40,448

​

$

(17,469)

​

(43)

%

33

Table of Contents

​

These costs are not analyzed by project since employees may be engaged in multiple projects simultaneously.

The net decrease in our research and development expenses of $17.5 million for the three months ended June 30, 2025 compared to the same period in 2024 was primarily due to the following:

● a decrease of $10.7 million in salaries, materials, equipment, depreciation of property, plant and equipment and other employee-related costs, which is driven primarily by an decrease in the average number of employees engaged in research and development and a reduction in temporary staff following the restructuring and reprioritization of activities that was announced in November 2024;

● a decrease of $4.3 million on subcontracted expenditure primarily due to a reduction in outsourced research costs;

● a decrease of $1.5 million in manufacturing facility expenditure due to reduction in manufacturing operations post restructuring;

● a decrease of $0.7 million in share-based compensation due to forfeiture credits as a result of redundancies arising as part of the restructuring; and

● a decrease of $0.3 million in reimbursements receivable for research and development tax and expenditure credits due to decreases in the associated research and development costs for which the credits may be claimed and changes to the tax credit schemes effective for financial years commencing from April 1, 2024, that affected the scope of qualifying expenditure and effective rate at which we claim credits.

Our subcontracted costs for the three months ended June 30, 2025 were $9.7 million, compared to $13.9 million in the same period of 2024. This includes $7.1 million of costs directly associated with our afami-cel, lete-cel and uza-cel T-cells and $2.6 million of other development costs.

Selling, General and Administrative Expenses

Selling, general and administrative expenses decreased by 3% to $18.5 million for the three months ended June 30, 2025 from $19.1 million for the three months ended June 30, 2024.

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three months ended

​

​

​

​

​

​

​

June 30,

​

​

​

​

​

2025

2024

Increase/decrease

​

Salaries, depreciation of property, plant and equipment and other employee-related costs

​

$

8,475

​

$

10,128

​

$

(1,653)

​

(16)

%

Restructuring charges

​

​

571

​

​

—

​

​

571

​

—

%

Professional fees

​

​

6,528

​

​

8,111

​

​

(1,583)

​

(20)

%

Other corporate costs

​

2,909

​

2,581

​

328

​

13

%

Share-based compensation expense

​

​

1,016

​

​

2,063

​

​

(1,047)

​

(51)

%

Commercial expenses

​

​

517

​

​

—

​

​

517

​

—

%

Reimbursements

​

(1,531)

​

(3,800)

​

2,269

​

(60)

%

​

​

$

18,485

​

$

19,083

​

$

(598)

​

(3)

%

​

34

Table of Contents

The net decrease in our selling, general and administrative expenses of $0.6 million for the three months ended June 30, 2025 compared to the same period in 2024 was largely due to:

​

● a decrease of $1.7 million in salaries, materials, equipment, depreciation of property, plant and equipment and other employee-related costs, which is driven primarily by a decrease in the average number of employees following the restructuring and reprioritization of activities that was announced in November 2024;

● a decrease of $1.6 million in professional fees is due to a reduction in accounting, legal and professional fees, due primarily to a reduction in legal fees relating to business development work and commercialization costs; and

● a decrease of $1.0 million in share-based compensation due to reduction in the average number of employees following the restructuring in announced in November 2024.

​

Interest income

Interest income primarily relates to interest on cash, cash equivalents and available-for-sale debt securities and is presented net of amortization/accretion of the premium/discount on purchase of the debt securities. Interest income was $0.2 million for the  three months ended June 30, 2025, compared to $1.3 million for the three months ended June 30, 2024. The decrease in the interest income is inline with the reduction in the investment in marketable securities.

Interest expense

Interest expense primarily relates to interest arising on the loan with Hercules Capital. For the three months ended June 30, 2025, the interest expense is $1.0 million compared to $0.5 million for the three months ended June 30, 2024, as the Loan and Securities agreement was only entered into in May 2024.

Income Taxes

Income taxes arise in the U.S. due to Adaptimmune LLC generating taxable profits. We typically incur taxable losses in the U.K. on an annual basis and have incurred losses in TCR² since the acquisition.

Results of Operations

Comparison of six months ended June 30, 2025 and 2024

The following table summarizes the results of our operations for the six months ended June 30, 2025 and 2024, together with the changes to those items (in thousands):

​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	Six months ended					​	​	​	​	​
​	​	June 30,					​	​	​		​
​		2025			2024			Increase/decrease
Product revenue, net	​	$	15,126	​	$	—	​	$	15,126	​	—	%
Development revenue	​	​	5,836	​	​	133,909	​	​	(128,073)	​	(96)	%
Revenue	​	$	20,962	​	$	133,909	​	$	(112,947)		(84)	%
Cost of goods sold	​	​	(3,380)	​	​	—	​	​	(3,380)	​	—	%
Research and development expenses	​		(51,836)	​		(75,655)	​		23,819		(31)	%
Selling, general and administrative expenses	​		(41,767)	​		(38,815)	​		(2,952)		8	%
Total operating expenses	​		(96,983)	​		(114,470)	​		17,487		(15)	%
(Loss)/profit from operations	​		(76,021)	​		19,439	​		(95,460)		(491)	%
Interest income	​		1,143	​		2,721	​		(1,578)		(58)	%
Interest expense	​	​	(2,843)	​	​	(526)	​	​	(2,317)	​	440	%
Other (expense) income, net	​		984	​		436	​		548		126	%
(Loss)/profit before income tax expense	​		(76,737)	​		22,070	​		(98,807)		(448)	%
Income tax expense	​		(1,187)	​		(1,052)	​		(135)		13	%
Net (loss)/profit attributable to ordinary shareholders	​	$	(77,924)	​	$	21,018	​	$	(98,942)		(471)	%

35

Table of Contents

​

Revenue

The revenue recognized in the six months ended June 30, 2025 relates to TECELRA product sales and development revenue under the Galapagos Collaboration Agreement and the GSK Termination and Transfer Agreement.

Revenue decreased by $112.9 million to $21.0 million in the six months ended June 30, 2025 compared to $133.9 million for the six months ended June 30, 2024. Revenue from development activities decreased by 96% for the six months ended June 30, 2025, compared to the same period in 2024. This decline was primarily due to the termination of the Genentech collaboration in April 2024 which resulted in the recognition of a cumulative catch-up adjustment of $101.3 million for the six months ended June 30, 2024. The product revenue has increased due to product sales commencing following the FDA approval of TECELRA on August 1, 2024.

Research and Development Expenses

Research and development expenses decreased by 31% to $51.8 million for the six months ended June 30, 2025 from $75.7 million for the six months ended June 30, 2024.

Our research and development expenses comprise the following (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Six months ended

​

​

​

​

​

​

​

June 30,

​

​

​

​

​

2025

2024

Increase/decrease

​

Salaries, materials, equipment, depreciation of property, plant and equipment and other employee-related costs(1)

​

$

34,132

​

​

49,114

​

$

(14,982)

​

(31)

%

Subcontracted expenditure

​

18,382

​

25,419

​

(7,037)

​

(28)

%

Manufacturing facility expenditure

​

3,043

​

5,172

​

(2,129)

​

(41)

%

Share-based compensation expense

​

173

​

1,808

​

(1,635)

​

(90)

%

In-process research and development costs

​

7

​

21

​

(14)

​

(67)

%

Reimbursements receivable for research and development tax and expenditure credits

​

(3,901)

​

(5,879)

​

1,978

​

(34)

%

​

​

$

51,836

​

$

75,655

​

$

(23,819)

​

(31)

%

​

(1) These costs are not analyzed by project since employees may be engaged in multiple projects simultaneously.

The net decrease in our research and development expenses of $23.8 million for the six months ended June 30, 2025 compared to the same period in 2024 was primarily due to the following:

● a decrease of $15.0 million in salaries, materials, equipment, depreciation of property, plant and equipment and other employee-related costs, which is driven primarily by an decrease in the average number of employees engaged in research and development and a reduction in temporary staff following the restructuring and reprioritization of activities that was announced in November 2024;

● a decrease of $7.0 million on subcontracted expenditure primarily due to a reduction in outsourced research costs;

● a decrease of $2.1 million in manufacturing facility expenditure due to reduction in manufacturing operations post restructuring;

● a decrease of $1.6 million in share-based compensation due to forfeiture credits as a result of redundancies arising as part of the restructuring; and

● a decrease of $2.0 million in reimbursements receivable for research and development tax and expenditure credits due to decreases in the associated research and development costs for which the credits may be claimed and changes to the tax credit schemes effective for financial years commencing from April 1, 2024, that affected the scope of qualifying expenditure and effective rate at which we claim credits.

36

Table of Contents

Our subcontracted costs for the six months ended June 30, 2025 were $18.4 million, compared to $25.4 million in the same period of 2024. This includes $13.6 million of costs directly associated with our afami-cel, lete-cel and uza-cel T-cells and $4.8 million of other development costs.

Selling, General and Administrative Expenses

Selling, general and administrative expenses increased by 8% to $41.8 million for the six months ended June 30, 2025 from $38.8 million in the same period in 2024. Our selling, general and administrative expenses consist of the following (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Six months ended

​

​

​

​

​

​

​

June 30,

​

​

​

​

​

2025

2024

Increase/decrease

​

Salaries, depreciation of property, plant and equipment and other employee-related costs

​

$

18,451

​

$

20,008

​

$

(1,557)

​

(8)

%

Restructuring charges

​

​

2,233

​

​

—

​

​

2,233

​

—

%

Professional fees

​

​

13,580

​

​

12,934

​

​

646

​

5

%

Other corporate costs

​

6,340

​

5,321

​

1,019

​

19

%

Share-based compensation expense

​

1,817

​

4,352

​

(2,535)

​

(58)

%

Selling expenses

​

​

877

​

​

—

​

​

877

​

—

%

Reimbursements

​

(1,531)

​

(3,800)

​

2,269

​

(60)

%

​

​

$

41,767

​

$

38,815

​

$

2,952

​

8

%

​

The net increase in our selling, general and administrative expenses of $3.0 million for the six months ended June 30, 2025 compared to the same period in 2024 was largely due to:

​

● a reduction of $1.6 million in salaries, materials, equipment, depreciation of property, plant and equipment and other employee-related costs, which is driven primarily by an decrease in the average number of employees following the restructuring and reprioritization of activities that was announced in November 2024; and

​

● a reduction of $2.5 million in share-based compensation due to forfeiture credits arising as a result of redundancies in the first and second quarter of 2025 arising from the restructuring program; offset by

● an increase in restructuring charges of $2.2 million, which related to the restructuring programme that was initiated in November 2024 and ongoing in the first and second quarter of 2025.

Interest income

Interest income primarily relates to interest on cash, cash equivalents and available-for-sale debt securities and is presented net of amortization/accretion of the premium/discount on purchase of the debt securities. Interest income was $1.1 million for the six months ended June 30, 2025, compared to $2.7 million for the six months ended June 30, 2024. The decrease in the interest income is inline with the reduction in the investment in marketable securities.

Interest expense

Interest expense primarily relates to interest arising on the loan with Hercules Capital. For the six months ended June 30, 2025, the interest expense is $2.8 million compared to $0.5 million for the six months ended June 30, 2024, as the Loan and Securities agreement was only entered into in May 2024.

Income Taxes

Income taxes arise in the U.S. due to Adaptimmune LLC generating taxable profits. We typically incur taxable losses in the U.K. on an annual basis and have incurred losses in TCR² since the acquisition.

37

Table of Contents

Liquidity and Capital Resources

Sources of Funds

Since our inception, we have incurred significant net losses and negative cash flows from operations. We financed our operations primarily through sales of equity securities, cash receipts under our collaboration arrangements and research and development tax and expenditure credits. From inception through to June 30, 2025, we have raised:

● $902.0 million, net of issuance costs, through the issuance of shares;

● $49.5 million, net of discount, drawn from the Hercules Capital loan facility;

● $545.8 million through collaborative arrangements with Galapagos, Genentech, GSK and Astellas Pharma Inc. (terminated on March 6, 2023);

● $154.9 million in the form of reimbursable U.K. research and development tax credits and receipts from the U.K. RDEC Scheme; and

● $45.3 million in cash and cash equivalents and restricted cash and $39.5 million of marketable securities acquired as part of the strategic combination with TCR².

We use a non-GAAP measure, Total Liquidity, which is defined as the total of cash and cash equivalents and marketable securities, to evaluate the funds available to us in the near-term. A description of Total Liquidity and reconciliation to cash and cash equivalents, the most directly comparable U.S. GAAP measure, are provided below under “Non-GAAP measures”.

On July 27, 2025, the Company entered into the Asset Purchase Agreement. Pursuant to the terms of the Asset Purchase Agreement, the Purchaser paid $55.0 million in cash on consummation of the transaction, a portion of which ($29.1 million) was paid directly to Hercules to repay all of the Company’s indebtedness under the Loan Agreement.

We believe that our Total Liquidity, combined with the upfront payment and the proceeds from the transaction described above, will be sufficient to fund our operations, based upon our currently anticipated restructuring activities, research and development activities and planned capital spending, for at least 12 months. This belief is based on estimates that are subject to risks and uncertainties and may change if actual results differ from management’s estimates.

​

Cash Flows

The following table summarizes the results of our cash flows for the six months ended June 30, 2025 and 2024 (in thousands):

​	​	​	​	​	​	​
​		​	Six months ended
​	​	​	June 30,
​		2025			2024
Net cash (used in)/provided by operating activities	​	$	(101,372)	​	$	15,449
Net cash provided by/(used in) investing activities	​		59,644	​		(1,101)
Net cash (used in)/provided by financing activities	​		(23,666)	​		53,747
Cash, cash equivalents and restricted cash	​		27,778	​		214,676

​

​

Operating Activities

Net cash used in operating activities was $101.4 million for the six months ended June 30, 2025 compared to $15.4 million provided by operating activities for the six months ended June 30, 2024. Our activities typically result in net use of cash in operating activities. In the six months ended June 30,2024 there was a receipt of research and development credits of $30.8 million , an $85 million upfront payment from Galapagos and a $7.7 million milestone payment from GSK, none of which were repeated in the six months ended

38

Table of Contents

June 30, 2025. Operating cash outflows also increased due to redundancy payments made in six months ended June 30, 2025, relating to the restructuring announced in November 2024.

Net cash used in operating activities of $101.4 million for the six months ended June 30, 2025 comprised a net loss of $77.9 million and a net cash outflow of $29.1 million from changes in operating assets and liabilities, offset by non-cash items of $5.6 million. The non-cash items consisted primarily of depreciation expense on plant and equipment of $4.6 million, share-based compensation expense of $2.0 million, unrealized foreign exchange gains of $0.9 million and other items of $0.1 million.

Investing Activities

Net cash provided by investing activities was $59.6 million for the six months ended June 30, 2025 compared to $1.1 million used in investing activities for the six months ended June 30, 2024. The net cash used in or provided by investing activities for the respective periods consisted primarily of:

● purchases of property, plant and equipment of $1.3 million and $0.5 million for the six months ended June 30, 2025 and 2024, respectively.

● there were no purchases of intangible assets in the six months ended June 30, 2025 compared to $0.6 million for the six months ended June 30,2024; and

● investments in marketable securities of $16.1 million in the six months ended June 30,2025 compared to none in the six months ended June 30, 2024; offset by

● cash inflows of $77.0 million from the maturity, redemption or sale of marketable securities in the six months ended June 30, 2025 compared to none for the six months ended June 30, 2024.

The Company invests surplus cash and cash equivalents in marketable securities.

Financing Activities

Net cash used in financing activities was $23.7 million for the six months ended June 30, 2025 compared to net cash provided by financing activities of $53.7 million for the six months ended June 30, 2024. The net cash used in financing activities in the six months ended June 30, 2025 consisted of a $25.5 million repayment of the Hercules Capital loan facility, offset by net proceeds of $1.8 million from shares issued in an ATM offering. The net cash provided by financing activities in the six months ended June 30, 2024 consisted primarily of net proceeds of $29.2 million from shares issued in an ATM offering, net of commissions and issuance costs.

​

Non-GAAP Measures

Total Liquidity

Total Liquidity (a non-GAAP financial measure) is the total of cash and cash equivalents and marketable securities. Each of these components appears in the condensed consolidated balance sheet. The U.S. GAAP financial measure most directly comparable to Total Liquidity is cash and cash equivalents as reported in the condensed consolidated financial statements, which reconciles to Total Liquidity as follows (in thousands):

​	​	​	​	​	​	​
​		June 30,			December 31,
​	​	2025		​	2024
Cash and cash equivalents	​	$	26,061	​	$	91,139
Marketable securities - available-for-sale debt securities	​		—	​		60,466
Total Liquidity	​	$	26,061	​	$	151,605

​

We believe that the presentation of Total Liquidity provides useful information to investors because management reviews Total Liquidity as part of its management of overall solvency and liquidity, financial flexibility, capital position and leverage. The definition of Total Liquidity includes marketable securities, which are highly-liquid and available to use in our current operations.

39

Table of Contents

Safe Harbor

See the section titled “Information Regarding Forward-Looking Statements” at the beginning of this Quarterly Report.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

There have been no material changes to the Company’s market risk during the three months ended June 30, 2025. For a discussion of the Company’s exposure to market risk, please refer to the Company’s market risk disclosures set forth in Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk” in our 2024 Annual Report.

​

Item 4. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e)) under the Securities and Exchange Act of 1934, as amended (“Exchange Act”) as of June 30, 2025.

Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective at June 30, 2025.

Changes in Internal Control over Financial Reporting

No changes in our internal control over financial reporting (as defined in Rules 13a-15(e) and 15d – 15(e)) under the Exchange Act) occurred during the quarter ended June 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II - OTHER INFORMATION

Item 1. Legal Proceedings.

On July 16, 2025, the Company entered into the Settlement Agreement with MD Anderson. As previously disclosed in the Company’s 2024 Annual Report and its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2025, MD Anderson served litigation in the District Court of Harris County against the Company. The litigation relates to the Alliance Agreement. MD Anderson claimed damages of over $21 million (excluding legal fees and costs of court) caused by the Company’s breach of contract. MD Anderson also brought an alternative action for quantum meruit, promissory estoppel, unjust enrichment, negligent misrepresentation and reformation.

Solely to avoid the costs, risks and uncertainties inherent in litigation, the Company and MD Anderson entered into the Settlement Agreement. The Settlement Agreement provides for the release and dismissal of all claims relating to the Alliance Agreement, with dismissal being dependent on receipt of full payment of settlement sums by MD Anderson. The financial payment obligations under the Settlement Agreement are not considered by the Company to be material to the Company and the Company does not believe that payment under the Settlement Agreement will have a material adverse effect on the Company’s financial position or results of operations.

40

Table of Contents

​

Item 1A. Risk Factors.

Our business has significant risks. You should carefully consider the risk factors set out in Part I, Item 1A “Risk Factors” of our 2024 Annual Report and the disclosures and risk factors set out in this Quarterly Report, including our condensed consolidated financial statements and the related notes, before making an investment decision regarding our securities. The risks and uncertainties described are those material risk factors currently known and specific to us that we believe are relevant to our business, results of operations and financial condition. Additional risks and uncertainties not currently known to us or that we now deem immaterial may also impair our business, results of operations and financial condition.

As of and for the period ended June 30, 2025, save as provided below there have been no material changes from the risk factors previously disclosed by us in Part I, Item 1A. Risk Factors of our 2024 Annual Report.

We may not be able to maintain compliance with the continued listing requirements of Nasdaq.

​

Our American Depository Shares (ADSs) are listed on Nasdaq. In order to maintain that listing, we must satisfy minimum financial and other requirements including, without limitation, a requirement that our closing bid price must not fall below $1.00 per ADS for 30 consecutive business days. On November 1, 2024, we received a notice from The Nasdaq Stock Market (“Nasdaq”) that the Company is not in compliance with Nasdaq’s Listing Rule 5450(a)(1), because the minimum bid price of the Company’s American Depositary Shares (“ADSs”) had been below $1.00 per share for 30 consecutive business days (the “Notice”). The Notice had no immediate effect on the listing or trading of the Company’s ADSs on The Nasdaq Global Select Market.

In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company had 180 calendar days, or until April 30, 2025, to regain compliance with the minimum bid price requirement. To regain compliance, the closing bid price of the Company’s ADSs had to be at least $1.00 per ADS for a minimum of ten consecutive business days during this 180 calendar day grace period, unless Nasdaq exercised its discretion to extend this ten-day period. On April 22, 2025, the Company made an application to transfer its listing to the Nasdaq Capital Market and requested an additional 180 calendar day compliance period. On May 1, 2025, Nasdaq approved the Company’s application to transfer its listing to the Nasdaq Capital Market, effective at the opening of business on May 2, 2025. To regain compliance with the minimum bid price requirement and qualify for continued listing on the Nasdaq Capital Market, the minimum bid price per ADS must be at least $1.00 per share for a minimum of ten consecutive business days during the additional 180 calendar day compliance period. However, if it appears to Nasdaq’s staff that the Company will not be able to cure the deficiency or if the Company is otherwise not eligible, Nasdaq would notify the Company that its securities would be subject to delisting. The Company may appeal any such determination to delist its securities, but there can be no assurance that any such appeal would be successful.

The Company intends to monitor the closing bid price of its ADSs and assess potential actions to regain compliance with Nasdaq’s Listing Rule 5450(a)(1). However, there can be no assurance that we will be able to regain compliance with the minimum bid price requirement or that we will otherwise maintain compliance with other Nasdaq listing requirements. If we fail to regain and maintain compliance with the minimum bid price requirement or to meet the other applicable continued listing requirements in the future and Nasdaq decides to delist our ADSs, the delisting could adversely affect the market price and liquidity of our ADSs, reduce our ability to raise additional capital and result in operational challenges and damage to investor relations and market reputation.

​

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

None.

​

Item 3. Defaults Upon Senior Securities.

None.

41

Table of Contents

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

During the three-month period ended June 30, 2025, none of our directors or officers adopted, modified or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement” as such terms are defined in Item 408(a) of Regulation S-K.

Item 6. Exhibits.

The following exhibits are either provided with this Quarterly Report or are incorporated herein by reference:

	​	​
Exhibit Number	​		Description of Exhibit
10.1	​	​		Asset Purchase Agreement, dated July 27, 2025, by and among Adaptimmune Limited, USWM CT, LLC and, solely for the purpose of Section 10.14 thereof, US WorldMeds Partners, LLC (incorporated by reference to Exhibit 2.1 to our Form 8-K filed with the SEC on July 28, 2025).
​	​	​		​
10.2	​	​		Rules of the Adaptimmune Therapeutics plc 2025 Employee Share Option Scheme and Rules of the Adaptimmune Therapeutics plc 2025 Non-Employee Share Option Scheme (incorporated by reference to Annex B to our Definitive Proxy Statement filed with the SEC on April 25, 2025).
​	​	​		​
31.1**	​	​		Certification of Principal Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
​	​	​		​
31.2**	​	​		Certification of Principal Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
​	​	​		​
32.1***	​	​		Certification of Principal Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
​	​	​		​
32.2***	​	​		Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
​	​	​		​
101**	​	​		The following financial information from Adaptimmune Therapeutics plc’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2025, formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) Unaudited Condensed Consolidated Balance Sheets as of June 30, 2025 and December 31, 2024, (ii) Unaudited Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2025 and 2024, (iii) Unaudited Condensed Consolidated Statements of Comprehensive Income/Loss for the three and six months ended June 30, 2025 and 2024, (iv) Unaudited Condensed Consolidated Statements of Change in Equity for the three and six months ended June 30, 2025 and 2024, (v) Unaudited Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2025 and 2024 and (vi) Notes to the Unaudited Condensed Consolidated Financial Statements.
​	​	​		​
104**	​	​		Cover Page Interactive date File (formatted in Inline XBRL and contained in Exhibit 101).

**    Filed herewith.

*** Furnished herewith.

​

​

​

42

Table of Contents

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.

​
​	ADAPTIMMUNE THERAPEUTICS PLC
​	​
​	​
Date: August 13, 2025	/s/ Adrian Rawcliffe
​	Adrian Rawcliffe
​	Chief Executive Officer
​	​
​	​
Date: August 13, 2025	/s/ Gavin Wood
​	Gavin Wood
​	Chief Financial Officer

​

​

43

FAQ

What did Adaptimmune (ADAP) sell and for how much?

Adaptimmune sold assets and rights related to TECELRA, letecel, afami-cel and uza-cel to US WorldMeds for $55.0 million upfront plus up to $30.0 million in contingent milestone payments.

How did the asset sale affect Adaptimmune's debt to Hercules?

A portion of the $55.0 million upfront payment was paid directly to Hercules to repay all indebtedness; the payoff amount was approximately $29.1 million and the Loan Agreement was terminated.

What were Adaptimmune's cash and operating results at June 30, 2025?

As of June 30, 2025 the company had $26.1 million in cash and cash equivalents, reported a six-month net loss of $77.9 million, and used $101.4 million in operating cash flows.

Does Adaptimmune have contracted future revenue?

Yes. Deferred revenue totaled $112.119 million at June 30, 2025 and the aggregate transaction price allocated to unsatisfied performance obligations was $121.309 million as disclosed.

What workforce changes did Adaptimmune announce?

Following the asset sale the company plans to further reduce its remaining workforce by approximately 62%; earlier restructuring actions reduced global headcount by approximately 29%.

What are the expected restructuring costs tied to the transaction?

The company expects to incur approximately $7 million to $8 million of pre-tax severance and other employee-related costs, primarily in the third quarter of 2025.