Alkermes (ALKS) EVP Hopkinson converts 6,866 RSUs, withholds 3,049 shares for taxes

Rhea-AI Filing Summary

Alkermes plc executive Craig C. Hopkinson reported equity award activity involving restricted stock units and ordinary shares. On 2/26/2026, he exercised 6,866 restricted stock units, which converted into 6,866 ordinary shares at a stated price of $0.0000 per share. In a related tax-withholding transaction, 3,049 ordinary shares were disposed of at $30.73 per share to cover tax obligations rather than as an open-market sale. Following these transactions, he directly held 93,389 ordinary shares and 13,732 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share and the award vests in four equal annual installments commencing on 02/26/2025.

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

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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^*

Hopkinson Craig C.

(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 R&D, Chief Medical Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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	02/26/2026		M		6,866	A	(1)	96,438	D
Ordinary Shares	02/26/2026		F		3,049	D	$30.73	93,389	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)	02/26/2026		M			6,866	(2)	(2)	Ordinary Shares	6,866	(1)	13,732	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 2/26/2025.

	/s/ Shantale Greenson, attorney-in-fact for Craig C. Hopkinson	02/27/2026
	** 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.

FAQ

What insider transactions did Alkermes (ALKS) executive Craig C. Hopkinson report?

Craig C. Hopkinson reported exercising 6,866 restricted stock units into ordinary shares and a related tax-withholding disposition of 3,049 ordinary shares. These moves reflect equity award vesting and tax settlement rather than open-market buying or selling activity.

How many Alkermes (ALKS) shares did Craig C. Hopkinson acquire through RSU conversion?

He acquired 6,866 ordinary shares through the exercise and conversion of 6,866 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share, reflecting equity compensation rather than a cash purchase in the market.

Why were 3,049 Alkermes (ALKS) shares disposed of in Craig C. Hopkinson’s Form 4?

The 3,049 ordinary shares were disposed of at $30.73 per share to satisfy tax liabilities tied to the equity award. This transaction is classified as a tax-withholding disposition, not an open-market sale initiated for portfolio or valuation reasons.

What is Craig C. Hopkinson’s Alkermes (ALKS) share ownership after these transactions?

After the reported transactions, Craig C. Hopkinson directly held 93,389 ordinary shares and 13,732 restricted stock units. These positions reflect his ongoing equity stake and compensation alignment as EVP R&D and Chief Medical Officer at Alkermes.

How do Craig C. Hopkinson’s Alkermes (ALKS) restricted stock units vest?

Shares subject to the restricted stock unit award vest in four equal annual installments, beginning on 02/26/2025. Each vested restricted stock unit converts into one ordinary share, creating a staggered, multi-year equity compensation schedule for the executive.

What do the restricted stock units in Alkermes (ALKS) Form 4 represent?

Each restricted stock unit represents a contingent right to receive one Alkermes ordinary share. The units vest over time, and upon vesting, they convert into ordinary shares, forming an important component of the executive’s long-term incentive compensation.