Alkermes plc (NASDAQ: ALKS) Form 144 lists affiliate sale amounts

Rhea-AI Filing Summary

Alkermes plc filed Form 144 disclosing proposed sales of Common Stock linked to equity awards. The notice lists vesting of 1,164 restricted stock units and 870 performance share units (awarded in 2017 and 2015). The filing shows two proposed transactions dated 03/02/2026 and 03/03/2026 with amounts 59,575.86 and 60,531.84.

Key Figures

Restricted stock units: 1,164 shares Performance share units: 870 shares Proposed sale amount: 59,575.86 +2 more

5 metrics

Restricted stock units 1,164 shares Vesting of restricted stock unit award on 03/01/2017

Performance share units 870 shares Vesting of performance share unit award on 10/05/2015

Proposed sale amount 59,575.86 Listed for proposed transaction dated 03/02/2026

Proposed sale amount 60,531.84 Listed for proposed transaction dated 03/03/2026

Shares outstanding figure 166,649,934 Displayed with date 04/06/2026 in the securities section

Key Terms

Form 144, restricted stock unit, performance share unit, issuer equity compensation plan

4 terms

Form 144 regulatory

"Filed notice of proposed sale by an affiliate"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

restricted stock unit financial

"Vesting of restricted stock unit award 03/01/2017"

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.

performance share unit financial

"Vesting of performance share unit award 10/05/2015"

A performance share unit (PSU) is a form of executive or employee pay that promises shares (or the cash value of shares) only if the company meets specific performance targets over a set period. Think of it like a bonus cheque that only arrives if the company hits agreed goals — it aligns managers’ rewards with business results and signals to investors how leadership is being incentivized to grow value over time.

issuer equity compensation plan regulatory

"Granted as part of issuer equity compensation plan"

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	70315.38	166649934	04/06/2026	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	03/01/2017	Vesting of restricted stock unit award	Alkermes plc.			1164	03/01/2017	Granted as part of issuer equity compensation plan
Common Stock	10/05/2015	Vesting of performance share unit award	Alkermes plc.			870	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
David Gaffin CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN 4 L2 00000	Common Stock	03/03/2026	2034	60531.84

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' (ALKS) Form 144 disclose?

It discloses proposed sales of Common Stock by an affiliate. The notice lists vesting of 1,164 RSUs and 870 PSUs, and two proposed transactions dated 03/02/2026 and 03/03/2026 with amounts shown in the filing.

How many equity awards are referenced in the ALKS filing?

The filing references 1,164 restricted stock units and 870 performance share units. Those awards are shown with grant or vesting dates of 03/01/2017 and 10/05/2015 and are described as part of the issuer equity compensation plan.

What transaction amounts are listed on Alkermes' Form 144?

The notice lists two amounts: 59,575.86 and 60,531.84. These figures are shown alongside proposed sale dates 03/02/2026 and 03/03/2026 in the filing excerpt.

Does the Form 144 show shares outstanding for ALKS?

The excerpt includes the number 166,649,934 with an associated date of 04/06/2026. The filing text presents that figure in the securities section; the excerpt does not elaborate further on how it is labeled.

Who is identified as the seller in the Form 144 excerpt?

The filing names David Gaffin with an address in Dublin as an associated person. Two proposed sales dated 03/02/2026 and 03/03/2026 are listed next to his entry in the excerpt.