Alkermes CMO reports RSU vesting, tax share withholding

Alkermes plc EVP R&D and Chief Medical Officer Craig C. Hopkinson reported equity compensation-related share movements, primarily from restricted stock units (RSUs) converting into ordinary shares.

Rhea-AI Filing Summary

Alkermes plc EVP R&D and Chief Medical Officer Craig C. Hopkinson reported equity compensation-related share movements, primarily from restricted stock units (RSUs) converting into ordinary shares. On February 18 and 19, 2026, RSU awards for 8,897 and 7,673 units were exercised, each unit representing one ordinary share.

To cover tax obligations associated with these vestings, 3,504 and 3,407 ordinary shares were automatically withheld and disposed of at prices of $32.02 and $32.00 per share, respectively, characterized as payment of tax liability rather than open-market sales. Following these transactions, Hopkinson directly owned 81,031 Alkermes ordinary shares. One referenced RSU award is noted as fully vested, while another vests in four equal annual installments starting on February 19, 2026.

Insider Trade Summary

16,570 shares exercised/converted

Exercise 6 txns

Insider Hopkinson Craig C.

Role EVP R&D, Chief Medical Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit Award	7,673	$0.00	$0.00
Exercise	Ordinary Shares	7,673	$0.00	$0.00
Exercise Price or Tax Liability	Ordinary Shares	3,407	$32.00	$109K
Exercise	Restricted Stock Unit Award	8,897	$0.00	$0.00
Exercise	Ordinary Shares	8,897	$0.00	$0.00
Exercise Price or Tax Liability	Ordinary Shares	3,504	$32.02	$112K

Holdings After Transaction: Restricted Stock Unit Award — 23,019 contracts (Direct); Ordinary Shares — 85,297 shares (Direct)

Footnotes (3)

1. F1. Each restricted stock unit represents a contingent right to receive one ordinary share.
2. F2. This award is fully vested in accordance with its terms.
3. F3. Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/19/2026.

FAQ

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

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

Craig C. Hopkinson reported RSU conversions into ordinary shares and related tax-withholding dispositions. RSU awards for 8,897 and 7,673 units converted into Alkermes ordinary shares, with a portion of the resulting shares withheld to satisfy tax liabilities instead of being open-market purchases or sales.

Were the Alkermes (ALKS) Form 4 transactions open-market buys or sells?

The transactions were not open-market buys or discretionary sales. They reflect RSU awards converting into ordinary shares and automatic share dispositions coded “F” to pay tax liabilities at $32.00 and $32.02 per share, typical of equity compensation vesting mechanics rather than active trading.

How many Alkermes (ALKS) shares does Craig C. Hopkinson own after these transactions?

After the reported RSU conversions and tax-withholding transactions, Craig C. Hopkinson directly owns 81,031 Alkermes ordinary shares. This figure reflects his direct holdings following both the derivative exercises and the associated share dispositions used to cover equity-related tax obligations.

What do the restricted stock unit (RSU) awards for Alkermes (ALKS) represent?

Each Alkermes restricted stock unit represents a contingent right to receive one ordinary share. When RSUs vest and are exercised, they convert into ordinary shares, increasing the holder’s share count, subject to separate share dispositions that may be used to pay exercise price or related tax liabilities.

How do the vesting terms of Craig C. Hopkinson’s Alkermes (ALKS) RSUs work?

One RSU award is fully vested under its terms, while another vests in four equal annual installments beginning February 19, 2026. As each installment vests, RSUs convert into ordinary shares, and separate share dispositions can be used to satisfy tax liabilities associated with the vesting events.

What is the significance of transaction codes M and F in this Alkermes (ALKS) Form 4?

Code M indicates exercise or conversion of a derivative security, here restricted stock units converting into ordinary shares at no cash price. Code F indicates shares delivered to pay exercise price or tax liability, meaning those dispositions are for withholding, not ordinary open-market selling activity.

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

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Accepted by SEC EDGAR 02/20/2026 - 04:22 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
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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^*

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)
02/18/2026

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		8,897	A	(1)	84,535	D
Ordinary Shares	02/18/2026		F		3,504	D	$32.02	81,031	D
Ordinary Shares	02/19/2026		M		7,673	A	(1)	88,704	D
Ordinary Shares	02/19/2026		F		3,407	D	$32	85,297	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			8,897	(2)	(2)	Ordinary Shares	8,897	(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 Craig C. Hopkinson	02/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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