Alkermes Form 144: Insider-reported common stock sales

Alkermes plc reported a Form 144 disclosure showing sales of Common Stock by an issuer-associated holder.

Rhea-AI Filing Summary

Alkermes plc reported a Form 144 disclosure showing sales of Common Stock by an issuer-associated holder. The filing lists three reported sales on 03/02/2026, 03/03/2026, and 04/06/2026 with amounts 59,575.86, 60,531.84, and 70,315.38 respectively. The record also lists earlier vesting events for restricted stock units and performance share units (355; 844; 776; 59) from 2017–2018.

Key Figures

Form 144 sale 1: 59,575.86 Form 144 sale 2: 60,531.84 Form 144 sale 3: 70,315.38 +4 more

7 metrics

Form 144 sale 1 59,575.86 sale listed on 03/02/2026

Form 144 sale 2 60,531.84 sale listed on 03/03/2026

Form 144 sale 3 70,315.38 sale listed on 04/06/2026

RSU vesting (Mar 1, 2017) 355 shares Vesting of restricted stock unit award on 03/01/2017

PSU vesting (May 28, 2017) 844 shares Vesting of performance share unit award on 05/28/2017

PSU vesting (Feb 26, 2018) 776 shares Vesting of performance share unit award on 02/26/2018

PSU vesting (Mar 1, 2018) 59 shares Vesting of performance share unit award on 03/01/2018

Key Terms

Form 144, restricted stock unit, performance share unit, Common Stock

4 terms

Form 144 regulatory

"lists three reported Common Stock sales on 03/02/2026, 03/03/2026, 04/06/2026"

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 | Alkermes plc. | 355 | 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 | Alkermes plc. | 844 | 05/28/2017"

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.

Common Stock market

"Common Stock | Merrill Lynch 225 Liberty Street Floor 37 New York NY 10281"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What sales does ALKS Form 144 disclose?

The Form 144 lists three reported Common Stock sales on 03/02/2026, 03/03/2026, and 04/06/2026, with amounts shown as 59,575.86, 60,531.84, and 70,315.38 respectively. The filing identifies the securities as Common Stock.

Who is identified in the ALKS Form 144 filing?

The filing names an individual associated with the reported transactions at an address in Dublin and lists the issuer as Alkermes plc. The disclosure includes vesting records tied to issuer equity compensation plans from 2017–2018.

Does the filing show any equity vesting activity for ALKS?

Yes. The excerpt lists vesting events: a restricted stock unit award of 355 on 03/01/2017 and performance share unit awards of 844, 776, and 59 on dates in 2017 and 2018, described as grants under the issuer’s equity compensation plan.

Is there information about the recipient or proceeds in the filing?

The excerpt identifies the reporting party and shows numeric amounts for the three reported sales. It does not state buyer identities or specify how the numeric amounts should be characterized beyond their listing in the Form 144 entries.

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

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Accepted by SEC EDGAR 05/04/2026 - 04:30 PM 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	67528.80	166649934	05/04/2026	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	03/01/2017	Vesting of restricted stock unit award	Alkermes plc.			355	03/01/2017	Granted as part of issuer equity compensation plan
Common Stock	05/28/2017	Vesting of performance share unit award	Alkermes plc.			844	05/28/2017	Granted as part of issuer equity compensation plan
Common Stock	02/26/2018	Vesting of performance share unit award	Alkermes plc.			776	02/26/2018	Granted as part of issuer equity compensation plan
Common Stock	03/01/2018	Vesting of performance share unit award	Alkermes plc.			59	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

144: Remarks and Signature

Remarks
Date of Notice	05/04/2026
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)