David Joseph Gaffin - 02 Mar 2026 Form 4 Insider Report for Alkermes plc. (ALKS)

Role
EVP, CLO, Alkermes, Inc.
Signature
/s/ Shantale Greenson, attorney-in-fact for David Joseph Gaffin
Issuer symbol
ALKS
Transactions as of
02 Mar 2026
Net transactions value
-$120,108
Form type
4
Filing time
04 Mar 2026, 20:15:36 UTC
Previous filing
27 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Gaffin David Joseph EVP, CLO, Alkermes, Inc. 900 WINTER STREET, WALTHAM /s/ Shantale Greenson, attorney-in-fact for David Joseph Gaffin 04 Mar 2026 0001675905

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ALKS Ordinary Shares Sale $59,576 -2,034 -0.85% $29.29 237,660 02 Mar 2026 Direct F1
transaction ALKS Ordinary Shares Sale $60,532 -2,034 -0.86% $29.76 235,626 03 Mar 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ALKS Employee Stock Option (Right to Buy) Award +78,292 $0.000000* 78,292 02 Mar 2026 Ordinary Shares 78,292 $30.25 Direct F2
transaction ALKS Restricted Stock Unit Award Award +36,364 $0.000000* 36,364 02 Mar 2026 Ordinary Shares 36,364 Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 11/19/2025.
F2 Shares underlying the stock option vest and become exercisable in four equal annual installments, commencing on 3/2/2027.
F3 Each restricted stock unit represents a contingent right to receive one ordinary share.
F4 Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 3/2/2027.