Alkermes officer preps 9,000-share stock sale

Rhea-AI Filing Summary

Alkermes plc. (ALKS) received a Rule 144 notice from officer Craig C. Hopkinson covering potential sales of its ordinary shares. The notice lists 9,000 ordinary shares held at Merrill Lynch and an issuer share count of 167,763,272 ordinary shares outstanding as of 09/01/2026.

Shares to be sold include 5,000 shares from an employee stock option exercise on 09/01/2026, 1,898 shares from vesting of a performance share award on 02/05/2026, and 2,102 shares from vesting of restricted stock units on 02/23/2026. The filing also lists several prior sales of 9,000-share blocks between March and August 2026.

Key Figures

Ordinary shares held at broker: 9,000 ordinary shares Aggregate market value of securities: $422,874.27 Ordinary shares outstanding: 167,763,272 ordinary shares +5 more

8 metrics

Ordinary shares held at broker 9,000 ordinary shares Ordinary shares at Merrill Lynch listed in securities information section

Aggregate market value of securities $422,874.27 Value associated with 9,000 ordinary shares in securities information section

Ordinary shares outstanding 167,763,272 ordinary shares Shares outstanding for Alkermes plc. as of 09/01/2026

Shares from employee stock option exercise 5,000 ordinary shares Securities to be sold on 09/01/2026 via broker assisted cashless exercise

Shares from performance share award vesting 1,898 ordinary shares Vesting on 02/05/2026 as part of issuer equity compensation plan

Shares from restricted stock unit vesting 2,102 ordinary shares Vesting on 02/23/2026 as part of issuer equity compensation plan

Recent single sale amount 9,000 ordinary shares Each of six sales between 03/02/2026 and 08/03/2026

Example sale proceeds $375,043.23 Proceeds for 9,000 ordinary shares sold on 06/01/2026

Key Terms

Rule 144, broker assisted cashless exercise, performance share award, restricted stock unit awards

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

broker assisted cashless exercise financial

"09/01/2026 | Broker assisted cashless exercise"

performance share award financial

"02/05/2026 | Vesting of performance share award"

A performance share award is a type of executive or employee pay that grants company stock only if predefined performance goals are met over a set period. Think of it as a bonus paid in shares—similar to a savings payout that arrives only if certain targets are hit—so it aligns management incentives with company results and can affect future share count and shareholder value. Investors watch these awards because they influence executive behavior, potential dilution of shares, and signals about expected performance.

restricted stock unit awards financial

"02/23/2026 | Vesting of restricted stock unit awards"

Restricted stock unit awards are company promises to deliver a specific number of shares to employees or service providers in the future once conditions—such as staying with the company for a set time or meeting performance targets—are met. They matter to investors because when the promises convert into actual shares they increase the total share count and can reduce earnings per share, while also aligning recipients’ interests with stock performance much like deferred pay that turns into ownership if goals are met.

FAQ

What does the Form 144 filing disclose for Alkermes plc. (ALKS)?

It discloses that officer Craig C. Hopkinson has filed a Rule 144 notice for potential sales of Alkermes plc. ordinary shares, including option exercise and equity award vesting shares, and reports prior 9,000-share sales in recent months.

How many Alkermes plc. (ALKS) shares does the Rule 144 notice list for potential sale?

The notice lists 5,000 shares from an employee stock option exercise, 1,898 shares from a performance share award vesting, and 2,102 shares from restricted stock unit vesting as securities to be sold under Rule 144.

What recent sales of Alkermes plc. (ALKS) shares are reported in the past 3 months section?

The filing reports six sales by Craig Hopkinson, each of 9,000 ordinary shares, on 03/02/2026, 04/01/2026, 05/01/2026, 06/01/2026, 07/01/2026, and 08/03/2026, with total proceeds listed for each transaction.

What is the stated number of Alkermes plc. (ALKS) shares outstanding in the filing?

The filing states that Alkermes plc. has 167,763,272 ordinary shares outstanding as of 09/01/2026; this is a baseline share count figure for the company.

What type of transactions generate the Alkermes plc. (ALKS) shares to be sold?

The shares to be sold arise from an employee stock option exercise, vesting of a performance share award, and vesting of restricted stock unit awards, all granted under Alkermes plc.’s equity compensation arrangements.

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Available on EDGAR 09/01/2026 - 04:11 PM Accepted by SEC EDGAR 09/01/2026 - 04:10 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001730048
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Alkermes plc.
SEC File Number	001-35299
Address of Issuer	CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN 4 IRELAND 00000
Phone	00-353-1-772-8000
Name of Person for Whose Account the Securities are To Be Sold	Hopkinson Craig C.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Ordinary shares	Merrill Lynch 225 Liberty St Floor 37 New York NY 10281	9000	422874.27	167763272	09/01/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Ordinary shares	09/01/2026	Exercise of employee stock options	Alkermes plc.			5000	09/01/2026	Broker assisted cashless exercise
Ordinary shares	02/05/2026	Vesting of performance share award	Alkermes plc.			1898	02/05/2026	Granted as part of issuer equity compensation plan
Ordinary shares	02/23/2026	Vesting of restricted stock unit awards	Alkermes plc.			2102	02/23/2026	Granted as part of issuer equity compensation plan

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Craig Hopkinson CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Ordinary shares	03/02/2026	9000	267485.14
Craig Hopkinson CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Ordinary shares	04/01/2026	9000	319604.00
Craig Hopkinson CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Ordinary Shares	05/01/2026	9000	300559.55
Craig Hopkinson CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Ordinary Shares	06/01/2026	9000	375043.23
Craig Hopkinson CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Ordinary Shares	07/01/2026	9000	463620.68
Craig Hopkinson CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Ordinary Shares	08/03/2026	9000	437220.00

144: Remarks and Signature

Remarks
Date of Notice	09/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/14/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Craig Hopkinson
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)