Alkermes COO exercises 8,738 RSUs, 3,880 withheld

Alkermes plc EVP and COO Jackson Blair Curtis reported equity transactions on 2/23/2026.

Rhea-AI Filing Summary

Alkermes plc EVP and COO Jackson Blair Curtis reported equity transactions on 2/23/2026. He exercised a restricted stock unit award, converting 8,738 restricted stock units into 8,738 ordinary shares at a stated price of $0.0000 per share.

To cover tax obligations related to this equity compensation, 3,880 ordinary shares were disposed of in a tax-withholding transaction at $32.1900 per share. After these transactions, Curtis directly owned 236,681 ordinary shares. Each restricted stock unit represents one ordinary share and vests in four equal annual installments beginning on 2/23/2024.

Insider Trade Summary

8,738 shares exercised/converted

Exercise 3 txns

Insider Jackson Blair Curtis

Role EVP, Chief Operating Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit Award	8,738	$0.00	$0.00
Exercise	Ordinary Shares	8,738	$0.00	$0.00
Exercise Price or Tax Liability	Ordinary Shares	3,880	$32.19	$125K

Holdings After Transaction: Restricted Stock Unit Award — 8,738 contracts (Direct); Ordinary Shares — 236,681 shares (Direct)

Footnotes (2)

1. F1. Each restricted stock unit represents a contingent right to receive one ordinary share.
2. F2. Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/23/2024.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Alkermes (ALKS) report for Jackson Blair Curtis?

Alkermes reported that EVP and COO Jackson Blair Curtis exercised 8,738 restricted stock units, receiving the same number of ordinary shares. A separate tax-withholding transaction disposed of 3,880 shares at $32.1900 per share, all held under direct ownership.

How many Alkermes (ALKS) shares does Jackson Blair Curtis own after this Form 4?

After the reported transactions, Jackson Blair Curtis directly owns 236,681 ordinary shares of Alkermes. This figure reflects receipt of 8,738 shares from restricted stock units and the tax-withholding disposition of 3,880 shares at $32.1900 per share.

What was the nature of the RSU transaction for Alkermes (ALKS) EVP Jackson Blair Curtis?

The Form 4 shows an exercise or conversion of a derivative security, where 8,738 restricted stock units were converted into 8,738 ordinary shares at a stated price of $0.0000 per share, as part of Curtis’s equity compensation package.

Were any Alkermes (ALKS) shares sold on the open market in this Form 4?

The filing reports a tax-withholding disposition of 3,880 ordinary shares at $32.1900 per share, coded “F.” This indicates shares delivered to satisfy tax obligations, not an open-market sale transaction by Jackson Blair Curtis.

How do Alkermes (ALKS) restricted stock units work in this Jackson Blair Curtis filing?

Each restricted stock unit represents a right to receive one ordinary share of Alkermes. According to the footnotes, the RSU award to Jackson Blair Curtis vests in four equal annual installments, starting on 2/23/2024, aligning with typical long-term incentive structures.

What transaction codes appear in Jackson Blair Curtis’s Alkermes (ALKS) Form 4?

The Form 4 shows code M for the exercise or conversion of a derivative security, converting 8,738 RSUs into ordinary shares, and code F for a tax-withholding disposition of 3,880 shares at $32.1900 per share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/25/2026 - 05:47 PM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Jackson Blair Curtis

(Last) (First) (Middle)

900 WINTER ST.

(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, Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

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	02/23/2026		M		8,738	A	(1)	240,561	D
Ordinary Shares	02/23/2026		F		3,880	D	$32.19	236,681	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)	02/23/2026		M			8,738	(2)	(2)	Ordinary Shares	8,738	(1)	8,738	D

Explanation of Responses:

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

2. Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/23/2024.

	/s/ Shantale Greenson, attorney-in-fact for Blair C. Jackson	02/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.