Alkermes plc (ALKS) Rule 144 notice: 2,000 vested RSU shares listed

Rhea-AI Filing Summary

Alkermes plc submitted a Rule 144 notice related to 2,000 shares of Common Stock tied to the vesting of restricted stock unit awards on 05/21/2026. The filing lists a shares outstanding figure of 166,675,807 as of 06/12/2026 as context.

Key Figures

Shares listed: 2,000 shares Shares outstanding: 166,675,807 shares Vesting date: 05/21/2026

3 metrics

Shares listed 2,000 shares vesting of restricted stock units on 05/21/2026

Shares outstanding 166,675,807 shares as of 06/12/2026

Vesting date 05/21/2026 date RSUs vested

Key Terms

restricted stock unit, Rule 144, vesting

3 terms

restricted stock unit financial

"Vesting of restricted stock unit awards on 05/21/2026"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Rule 144 regulatory

"Filer submitted a Rule 144 notice related to shares to be sold"

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.

vesting financial

"05/21/2026 | Vesting of restricted stock unit awards"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

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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	2000	90200.00	166675807	06/12/2026	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	05/21/2026	Vesting of restricted stock unit awards	Alkermes plc.			2000	05/21/2026	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

Nothing to Report

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 (ALKS) Form 144 filing report?

It reports the proposed sale under Rule 144 of 2,000 shares that vested from restricted stock units on 05/21/2026. The notice documents the planned transfer rather than company financial results.

Who is the issuer and what triggered the ALKS Rule 144 filing?

The issuer is Alkermes plc; the filing was triggered by the vesting of restricted stock unit awards on 05/21/2026, creating shares eligible for sale under Rule 144 procedures.

How many shares does the Form 144 show for ALKS and when did they vest?

The Form 144 shows 2,000 shares referenced as vesting on 05/21/2026. These shares stem from equity compensation and are identified for potential resale under Rule 144.

Does the filing state Alkermes will receive proceeds from the sale?

The excerpt does not state proceeds or designate who will receive sale proceeds. The notice documents the shares eligible for resale; cash‑flow treatment is not detailed in the provided excerpt.

What is the company share count context shown in the filing for ALKS?

The filing lists 166,675,807 shares outstanding with an associated date of 06/12/2026, presented as a contextual baseline in the excerpt.