Brian P. McKeon - 20 May 2026 Form 4 Insider Report for Alkermes plc. (ALKS)

Reporting relationship: Director
Issuer ticker: ALKS
Reported as of: 20 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 22 May 2026, 20:03:35 UTC
Prior SEC filing: 02 Mar 2026
Next SEC filing: 05 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Shantale Greenson, attorney-in-fact for Brian P. McKeon

Key filing fact

Brian P. McKeon filed Form 4 for Alkermes plc. (ALKS) on 22 May 2026.

Key facts

This page summarizes Brian P. McKeon's Form 4 filing for Alkermes plc. (ALKS).
5 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 22 May 2026, 20:03.

Change

Previous filing in this sequence was filed on 02 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001219445 Primary reporting owner

MCKEON BRIAN P

Relationship: Director
Address: CONNAUGHT HOUSE, 1 BURLINGTON ROAD, DUBLIN, IRELAND
Signature: /s/ Shantale Greenson, attorney-in-fact for Brian P. McKeon
Signature date: 22 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALKS transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +6,142
Change %: +18%
Price
Shares after: 40,011
Date: 21 May 2026
Ownership: Direct
Footnotes: F1

ALKS transaction

Ordinary Shares

Tax liability

Transaction value
Shares: -1,475
Change %: -3.7%
Price: $36.95^*
Shares after: 38,536
Date: 21 May 2026
Ownership: Direct

ALKS holding

Ordinary Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 10,000
Date: 20 May 2026
Ownership: By the Brian P. McKeon Trust
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALKS transaction Derivative

Non Qualified Stock Option (Right to Buy)

Award

Transaction value
Shares: +11,538
Change %
Price: $0.000000^*
Shares after: 11,538
Date: 20 May 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 11,538
Exercise price: $36.98
Footnotes: F3

ALKS transaction Derivative

Restricted Stock Unit Award

Award

Transaction value
Shares: +5,409
Change %
Price: $0.000000^*
Shares after: 5,409
Date: 20 May 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 5,409
Exercise price
Footnotes: F1, F3

ALKS transaction Derivative

Restricted Stock Unit Award

Options Exercise

Transaction value
Shares: -6,142
Change %: -100%
Price
Shares after: 0
Date: 21 May 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 6,142
Exercise price
Footnotes: F1, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Each restricted stock unit represents a contingent right to receive one ordinary share.

Footnote F2

Shares are held by The Brian P. McKeon Revocable Trust, dated April 12, 2007 and amended and restated on February 8, 2019 (the "Brian P. McKeon Trust"), of which the reporting person and his wife are the trustees and members of the reporting person's immediate family are the beneficiaries.

Footnote F3

Shares subject to the award vest (and if applicable, become exercisable) in full on the earlier of the one-year anniversary of the date of grant or the date of the issuer's next annual general meeting of shareholders that occurs at least 50 weeks after the date of grant.

Footnote F4

This award is fully vested in accordance with its terms.