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Alkermes EVP exercises 7,689 RSUs, updates holdings

Alkermes plc executive David Joseph Gaffin, EVP and CLO of Alkermes, Inc., reported the vesting and exercise of 7,689 restricted stock units into ordinary shares on February 23, 2026.

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Form Type
4

Rhea-AI Filing Summary

Alkermes plc executive David Joseph Gaffin, EVP and CLO of Alkermes, Inc., reported the vesting and exercise of 7,689 restricted stock units into ordinary shares on February 23, 2026. In a related tax-withholding disposition, 3,414 ordinary shares were used at $32.19 per share. Following these transactions, he directly holds 235,877 ordinary shares. The restricted stock unit award vests in four equal annual installments beginning February 23, 2024.

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Insider Gaffin David Joseph
Role EVP, CLO, Alkermes, Inc.
Type Security Shares Price Value
Exercise Restricted Stock Unit Award 7,689 $0.00 $0.00
Exercise Ordinary Shares 7,689 $0.00 $0.00
Exercise Price or Tax Liability Ordinary Shares 3,414 $32.19 $110K
Holdings After Transaction: Restricted Stock Unit Award — 7,690 contracts (Direct); Ordinary Shares — 235,877 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.
RSUs exercised 7,689 shares Restricted stock units converted into ordinary shares on February 23, 2026
Tax-withholding shares 3,414 shares Ordinary shares disposed of in a tax-withholding transaction at $32.19 per share
Tax-withholding price $32.19 per share Price applied to the 3,414 ordinary shares used for tax withholding
Post-transaction holdings 235,877 shares Direct ordinary share holdings after the reported transactions
RSU vesting schedule 4 equal annual installments Installments commencing on February 23, 2024 for the RSU award
Restricted Stock Unit Award financial
"security_title: Restricted Stock Unit Award"
A restricted stock unit award is a promise by a company to give an employee a specified number of company shares at a future date if certain conditions are met, such as staying with the company or hitting performance goals. For investors, these awards matter because they can increase the total number of shares outstanding when converted, diluting existing holders, and they align employees’ incentives with shareholders’ interests much like giving a rising bonus that becomes real only after conditions are satisfied.
tax-withholding disposition financial
"transaction_action: tax-withholding disposition"
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
contingent right financial
"represents a contingent right to receive one ordinary share"
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

FAQ

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

What insider activity did Alkermes (ALKS) report for EVP David Gaffin?

EVP and CLO David Joseph Gaffin reported the vesting and exercise of 7,689 restricted stock units into ordinary shares, plus a related tax-withholding disposition of 3,414 shares at $32.19 per share on February 23, 2026.

How many RSUs vested for Alkermes (ALKS) EVP David Gaffin in this filing?

David Gaffin had 7,689 restricted stock units convert into ordinary shares. Each restricted stock unit represents a contingent right to receive one ordinary share, as part of a multi-year equity compensation award.

How many Alkermes (ALKS) shares were used for tax withholding in this Form 4?

A total of 3,414 ordinary shares were disposed of in a tax-withholding transaction at $32.19 per share. This followed the conversion of restricted stock units into ordinary shares on February 23, 2026.

How many Alkermes (ALKS) shares does David Gaffin hold after these transactions?

After the reported transactions, David Gaffin directly holds 235,877 Alkermes ordinary shares. This post-transaction holding reflects the exercised restricted stock units and the shares used in the related tax-withholding disposition.

What is the vesting schedule of the RSU award in the Alkermes (ALKS) Form 4?

The restricted stock unit award vests in four equal annual installments, starting on February 23, 2024. Each installment represents a portion of the total RSUs that may convert into ordinary shares over the four-year period.

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

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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*
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)
02/23/2026
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 7,689 A (1) 239,291 D
Ordinary Shares 02/23/2026 F 3,414 D $32.19 235,877 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 7,689 (2) (2) Ordinary Shares 7,689 (1) 7,690 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 David Joseph Gaffin 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.

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