Alkermes officer files notice for stock sale

An Alkermes plc. officer filed a Rule 144 notice covering planned and recent sales of common stock.

Rhea-AI Filing Summary

Alkermes plc. (ALKS) has a notice filed under Rule 144 for potential sales of common stock by officer David Joseph Gaffin, with Merrill Lynch identified in connection with the transaction and NASDAQ listed as the market. The notice also lists prior acquisitions of shares through vesting of restricted stock unit awards under the issuer’s equity compensation plan and multiple sales of common stock reported during the past three months, each with stated dates and corresponding share and dollar figures.

Key Figures

Reported units in each of three recent sales: 2,034 units of common stock per sale Reported figure for June 4, 2026 sale: 87,563.70 Reported figure for July 6, 2026 sale: 109,897.02 +4 more

7 metrics

Reported units in each of three recent sales 2,034 units of common stock per sale Listed for sales dated June 4, 2026; July 6, 2026; and August 3, 2026 in the past-3-months section

Reported figure for June 4, 2026 sale 87,563.70 Dollar figure listed alongside the June 4, 2026 Alkermes plc. common stock sale

Reported figure for July 6, 2026 sale 109,897.02 Dollar figure listed alongside the July 6, 2026 Alkermes plc. common stock sale

Reported figure for August 3, 2026 sale 98,811.72 Dollar figure listed alongside the August 3, 2026 Alkermes plc. common stock sale

Units from May 20, 2014 vesting 1,011 units Common stock from vesting of a restricted stock unit award on May 20, 2014

Units from May 21, 2014 vesting 622 units Common stock from vesting of a restricted stock unit award on May 21, 2014

Units from May 20, 2015 vesting 401 units Common stock from vesting of a restricted stock unit award on May 20, 2015

Key Terms

Rule 144, restricted stock unit award, issuer equity compensation plan, Securities Sold During The Past 3 Months

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.

restricted stock unit award financial

"Vesting of restricted stock unit award | Alkermes plc."

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.

issuer equity compensation plan financial

"Granted as part of issuer equity compensation plan"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

Who is selling Alkermes plc. (ALKS) stock in this Form 144 filing?

The notice identifies David Joseph Gaffin, an officer, as the person for whose account Alkermes plc. common stock is to be sold, with information also provided for other persons whose sales must be aggregated under Rule 144.

What type of Alkermes plc. (ALKS) security is covered by this Rule 144 notice?

The filing covers common stock of Alkermes plc. It identifies Merrill Lynch in the broker section and lists NASDAQ as the market where the common stock is referenced.

What recent Alkermes plc. (ALKS) stock sales are disclosed for the past 3 months?

The filing lists sales of Alkermes plc. common stock on June 4, 2026, July 6, 2026, and August 3, 2026, each associated with 2,034 units of common stock and reported dollar figures of 87,563.70, 109,897.02, and 98,811.72, respectively.

How were some of the Alkermes plc. (ALKS) shares originally acquired?

The notice states that certain common shares were acquired through vesting of restricted stock unit awards on May 20, 2014, May 21, 2014, and May 20, 2015, with amounts of 1,011, 622, and 401 units, all granted as part of an issuer equity compensation plan.

Which broker and market are referenced for the Alkermes plc. (ALKS) Rule 144 sale?

The securities information section lists Merrill Lynch with an address at 225 Liberty Street, Floor 37, New York, and refers to NASDAQ in connection with the Alkermes plc. common stock covered by the notice.

When is the Alkermes plc. (ALKS) Rule 144 sale expected in this notice?

The securities information includes a date of September 3, 2026 alongside the Alkermes plc. common stock entry, indicating when the reported sale-related information applies in this Rule 144 notice.

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

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Available on EDGAR 09/03/2026 - 05:04 PM EDT Accepted by SEC EDGAR 09/03/2026 - 04:58 PM EDT 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	0001675905
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	Gaffin David Joseph
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
Common Stock	Merrill Lynch 225 Liberty Street Floor 37 New York NY 10281	2034	97652.34	167763272	09/03/2026	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 *
Common Stock	05/20/2014	Vesting of restricted stock unit award	Alkermes plc.			1011	05/20/2014	Granted as part of issuer equity compensation plan
Common Stock	05/21/2014	Vesting of restricted stock unit award	Alkermes plc.			622	05/21/2014	Granted as part of issuer equity compensation plan
Common Stock	05/20/2015	Vesting of restricted stock unit award	Alkermes plc.			401	05/20/2015	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
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Common Stock	06/04/2026	2034	87563.70
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Common Stock	07/06/2026	2034	109897.02
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Common Stock	08/03/2026	2034	98811.72

144: Remarks and Signature

Remarks
Date of Notice	09/03/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/19/2025
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	David Gaffin
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)