Alkermes (ALKS) EVP exercises RSUs; 5,533 shares applied to taxes

Rhea-AI Filing Summary

Alkermes plc executive David Joseph Gaffin reported multiple equity award transactions. On February 18 and 19, 2026, he exercised restricted stock unit awards into ordinary shares, with each unit converting into one ordinary share.

He acquired 7,673 ordinary shares and 6,355 ordinary shares through derivative exercises at a stated price of $0.00 per share. On the same dates, he disposed of 3,407 and 2,126 ordinary shares, respectively, to cover tax liabilities through share withholding. After these transactions, his directly held ordinary shares totaled 231,602. One award is fully vested, while another vests in four equal annual installments starting on February 19, 2026.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gaffin David Joseph

(Last) (First) (Middle)

900 WINTER STREET

(Street)

WALTHAM MA 02451

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Alkermes plc. [ ALKS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, CLO, Alkermes, Inc.

3. Date of Earliest Transaction (Month/Day/Year)
02/18/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	02/18/2026		M		6,355	A	(1)	229,462	D
Ordinary Shares	02/18/2026		F		2,126	D	$32.02	227,336	D
Ordinary Shares	02/19/2026		M		7,673	A	(1)	235,009	D
Ordinary Shares	02/19/2026		F		3,407	D	$32	231,602	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit Award	(1)	02/18/2026		M			6,355	(2)	(2)	Ordinary Shares	6,355	(1)	0	D
Restricted Stock Unit Award	(1)	02/19/2026		M			7,673	(3)	(3)	Ordinary Shares	7,673	(1)	23,019	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one ordinary share.

2. This award is fully vested in accordance with its terms.

3. Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/19/2026.

	/s/ Shantale Greenson, attorney-in-fact for David Joseph Gaffin	02/20/2026
	** Signature of Reporting Person	Date
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FAQ

What insider transactions did Alkermes (ALKS) executive David Joseph Gaffin report?

David Joseph Gaffin reported exercises of restricted stock unit awards into Alkermes ordinary shares and related tax-withholding dispositions. He converted derivative awards into shares and used a portion of those shares to satisfy tax obligations, all recorded as direct ownership changes.

How many Alkermes (ALKS) shares did David Gaffin acquire and dispose in this Form 4?

David Gaffin acquired 7,673 and 6,355 ordinary shares through derivative exercises, and disposed of 3,407 and 2,126 shares to cover taxes. These transactions reflect equity award settlement and associated tax-withholding rather than open-market purchases or sales of Alkermes stock.

What is David Gaffin’s Alkermes (ALKS) share ownership after these transactions?

Following the reported transactions, David Gaffin directly holds 231,602 Alkermes ordinary shares. This figure reflects the net result after exercising restricted stock unit awards and delivering a portion of the resulting shares to cover tax liabilities through Form 4 code F dispositions.

How do the restricted stock units reported for Alkermes (ALKS) vest for David Gaffin?

Each restricted stock unit represents a right to receive one Alkermes ordinary share. One reported award is fully vested, while another award vests in four equal annual installments, beginning on February 19, 2026, providing David Gaffin with staged future share delivery rights.

Were David Gaffin’s Alkermes (ALKS) Form 4 transactions open-market buys or sells?

The filing shows derivative exercises and tax-withholding dispositions, not open-market trades. Code M entries reflect exercises or conversions of restricted stock unit awards, and code F entries indicate shares delivered to pay tax liabilities tied to those equity award settlements.