[144] Alkermes plc. SEC Filing

Rhea-AI Filing Summary

Alkermes plc submitted a Form 144 notice concerning proposed sales of Common Stock on 06/04/2026 for shares traded on NASDAQ. The filing lists vested restricted stock unit awards of 506 (03/03/2015) and 1,528 (03/01/2018) shares and records four prior sales in the past three months: 59,575.86, 60,531.84, 70,315.38, and 67,528.80.

Insights

Securities Compliance Counsel

Form 144 filed for proposed resale of Common Stock by an insider.

Form 144 is used to notify the SEC of an intended sale of restricted or control securities under Rule 144. This filing lists vested RSUs (506 and 1,528 shares) and multiple prior transactions in the last three months with numeric entries shown.

Timing and exact sale mechanics are not disclosed in the excerpt; subsequent filings or broker reports would show actual sale execution and proceeds.

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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	87563.70	166675807	06/04/2026	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	03/03/2015	Vesting of restricted stock unit award	Alkermes plc.			506	03/03/2015	Granted as part of issuer equity compensation plan
Common Stock	03/01/2018	Vesting of restricted stock unit award	Alkermes plc.			1528	03/01/2018	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
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN 4 L2 00000	Common Stock	03/03/2026	2034	60531.84
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN 4 L2 00000	Common Stock	04/06/2026	2034	70315.38
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 00000	Common Stock	05/04/2026	2034	67528.80

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 plc's Form 144 dated 06/04/2026 indicate?

It indicates a proposed resale of Common Stock of Alkermes plc on NASDAQ, filed on 06/04/2026. The notice lists vested RSUs and prior sales but does not state execution details or proceeds.

How many restricted stock units are listed as vested in this Form 144?

The filing lists two vested restricted stock unit awards: 506 shares (03/03/2015) and 1,528 shares (03/01/2018). These are shown as granted under the issuer's equity compensation plan.

What prior sales are reported in the past three months for ALKS?

The Form 144 shows four prior Common Stock sales with numeric entries: 59,575.86, 60,531.84, 70,315.38, and 67,528.80. The filing lists these amounts and dates in the past three months.

Does the Form 144 state how proceeds will be used or who receives them?

No. The excerpt does not state the use of proceeds or identify the recipient of sale proceeds. It lists securities, vesting dates, and past sales but omits proceeds disposition details.

Does this Form 144 confirm completed sales or only proposed sales?

Form 144 primarily notifies of a proposed resale under Rule 144; the filing lists prior transactions in the past three months but does not by itself confirm execution of the newly proposed sale.