2,034-share Rule 144 sale by Alkermes insider (NASDAQ: ALKS)

Rhea-AI Filing Summary

Alkermes plc receipt of a Rule 144 notice indicates a proposed sale of 2,034 shares of common stock. The filing lists the issuer as Alkermes plc, the filer name David Gaffin, and a transaction date of 03/03/2026 on NASDAQ.

The filing also lists vesting entries for restricted stock unit and performance share unit awards dated 03/03/2017, 03/03/2018, 05/28/2015, and 10/05/2015, and notes a prior sale by the filer on 03/02/2026.

Insights

Securities Counsel

Rule 144 notice for an insider sale of common stock; procedural disclosure rather than operational news.

The filing identifies a proposed sale of 2,034 shares of common stock by a reporting person and includes vesting entries for restricted stock and performance share units dated between 2015 and 2018. This is a compliance disclosure under Rule 144.

Impact depends on actual sales executed and volumes; the filing notes a reported transaction on 03/02/2026. Subsequent transaction filings will state executed amounts and sale mechanics.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	60531.84	166649934	03/03/2026	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	03/03/2017	Vesting of restricted stock unit award	Alkermes plc.			100	03/03/2017	Granted as part of issuer equity compensation plan
Common Stock	03/03/2018	Vesting of restricted stock unit award	Alkermes plc.			881	03/03/2018	Granted as part of issuer equity compensation plan
Common Stock	05/28/2015	Vesting of restricted stock unit award	Alkermes plc.			843	05/28/2015	Granted as part of issuer equity compensation plan
Common Stock	10/05/2015	Vesting of performance share unit award	Alkermes plc.			210	10/05/2015	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 4 L2 00000	Common Stock	03/02/2026	2034	59575.86

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Alkermes' Form 144 filed by David Gaffin mean?

It notifies the SEC of a proposed sale of restricted shares. The notice lists a proposed sale of 2,034 shares and identifies vesting awards; it is a procedural disclosure required under Rule 144 for certain insider sales.

How many Alkermes (ALKS) shares are listed for proposed sale in this Form 144?

The filing lists 2,034 shares of common stock. That quantity appears on the securities line with an associated date of 03/03/2026 and Nasdaq as the market.

Does the Form 144 confirm a completed sale by the filer?

No — it reports a proposed sale and a recent transaction. The filing shows a prior sale entry dated 03/02/2026, but final executed amounts and mechanics must appear in subsequent transaction reports.

Are the shares from compensation awards or open‑market holdings?

The notice lists vesting of restricted stock units and performance share units. Vesting dates shown include 03/03/2017, 03/03/2018, 05/28/2015, and 10/05/2015, indicating compensation‑related origin.

Where was the proposed sale to occur according to the filing?

The filing identifies Nasdaq as the market for the listed securities. The securities line includes a market designation of NASDAQ and a transaction date of 03/03/2026.