Alkermes plc (ALKS) EVP Jackson logs PRSU vesting and share disposition

Rhea-AI Filing Summary

Alkermes plc executive Blair Curtis Jackson reported new share awards and a related share disposition. On February 5, 2026, Jackson acquired 28,810 ordinary shares at no cost from the vesting of performance-based restricted stock units granted on February 23, 2023, covering a three-year period that ended December 31, 2025. The vesting followed the determination that certain performance goals were achieved and a relative total shareholder return adjustment was applied.

On the same date, Jackson disposed of 8,626 ordinary shares at $33.55 per share in a transaction coded "F," and held 221,552 ordinary shares directly after these transactions.

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^*

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)
02/05/2026

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	02/05/2026		A		28,810	A	(1)	230,178	D
Ordinary Shares	02/05/2026		F		8,626	D	$33.55	221,552	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

Explanation of Responses:

1. These ordinary shares were acquired by the reporting person as a result of the vesting of performance-vesting restricted stock unit awards granted to the reporting person on February 23, 2023 with a three-year performance period that ended on December 31, 2025 (the "2023 PRSUs"). The vesting of this portion of the 2023 PRSUs was triggered by the determination of achievement of certain pre-specified performance goals and application of a relative total shareholder return modifier and represents the final vesting event under the 2023 PRSUs.

	/s/ Shantale Greenson, attorney-in-fact for Blair C. Jackson	02/06/2026
	** 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.
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FAQ

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

Blair Curtis Jackson reported acquiring 28,810 Alkermes ordinary shares from vesting performance-based RSUs and disposing of 8,626 shares at $33.55 on February 5, 2026, ending with 221,552 ordinary shares held directly.

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

After the reported transactions, EVP Blair Curtis Jackson directly holds 221,552 Alkermes ordinary shares. This reflects the vesting of 28,810 performance-based RSU shares and the disposition of 8,626 shares on February 5, 2026.

What triggered the vesting of Blair Curtis Jackson’s 2023 Alkermes (ALKS) PRSUs?

The 2023 performance-vesting RSUs vested after Alkermes determined achievement of pre-specified performance goals and applied a relative total shareholder return modifier for the three-year period ending December 31, 2025, completing the final vesting event for those awards.

What does the transaction code "A" mean in Blair Curtis Jackson’s Alkermes (ALKS) Form 4?

In this Form 4, transaction code "A" corresponds to Blair Curtis Jackson acquiring 28,810 Alkermes ordinary shares at no cost on February 5, 2026, upon vesting of previously granted performance-based restricted stock unit awards.

What does the transaction code "F" indicate in the Alkermes (ALKS) Form 4 filing?

The Form 4 shows transaction code "F" for Blair Curtis Jackson’s disposition of 8,626 Alkermes ordinary shares at $33.55 per share on February 5, 2026, reducing his directly held shares from 230,178 to 221,552.