Alkermes director exercises RSUs, 901 shares withheld

Alkermes plc. director Nancy Lurker reported a routine equity compensation event.

Rhea-AI Filing Summary

Alkermes plc. director Nancy Lurker reported a routine equity compensation event. She exercised a restricted stock unit award covering 3,751 ordinary shares, converting it into the same number of ordinary shares at a stated price of $0.00 per share.

Of these shares, 901 ordinary shares were withheld at $33.36 per share to cover tax obligations related to the vesting, leaving her with 13,555 ordinary shares held directly after the transactions. The restricted stock units vest in three equal annual installments beginning on April 11, 2025.

Insider Trade Summary

3,751 shares exercised/converted

Exercise 3 txns

Insider Lurker Nancy

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit Award	3,751	$0.00	$0.00
Exercise	Ordinary Shares	3,751	$0.00	$0.00
Exercise Price or Tax Liability	Ordinary Shares	901	$33.36	$30K

Holdings After Transaction: Restricted Stock Unit Award — 3,752 contracts (Direct); Ordinary Shares — 13,555 shares (Direct)

Footnotes (2)

1. F1. Each restricted stock unit represents a contingent right to receive one ordinary share.
2. F2. Shares subject to the restricted stock unit award vest in three equal annual installments commencing on 4/11/2025.

Key Figures

RSUs exercised: 3,751 units/shares Tax withholding shares: 901 shares at $33.36 Shares held after transaction: 13,555 ordinary shares +2 more

5 metrics

RSUs exercised 3,751 units/shares Restricted stock unit award converted into ordinary shares

Tax withholding shares 901 shares at $33.36 Shares withheld to cover tax liability on vesting

Shares held after transaction 13,555 ordinary shares Direct holdings after RSU exercise and tax withholding

Exercise price per RSU $0.00 per share Stated price for conversion of restricted stock units

RSU vesting schedule Three equal annual installments Commencing on April 11, 2025 per footnote

Key Terms

Restricted Stock Unit Award, tax-withholding disposition, Exercise or conversion of derivative security, vesting

4 terms

Restricted Stock Unit Award financial

"Each restricted stock unit represents a contingent right to receive one ordinary share."

A restricted stock unit award is a promise by a company to give an employee a specified number of company shares at a future date if certain conditions are met, such as staying with the company or hitting performance goals. For investors, these awards matter because they can increase the total number of shares outstanding when converted, diluting existing holders, and they align employees’ incentives with shareholders’ interests much like giving a rising bonus that becomes real only after conditions are satisfied.

tax-withholding disposition financial

"Payment of exercise price or tax liability by delivering securities"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Exercise or conversion of derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

vesting financial

"Shares subject to the restricted stock unit award vest in three equal annual installments"

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.

FAQ

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

What insider transaction did Alkermes (ALKS) director Nancy Lurker report?

Nancy Lurker reported exercising a restricted stock unit award for 3,751 ordinary shares. The award converted into shares at a stated price of $0.00 per share as part of her equity compensation, rather than an open-market stock purchase or sale.

How many Alkermes (ALKS) shares does Nancy Lurker hold after this Form 4?

After the reported transactions, Nancy Lurker directly holds 13,555 Alkermes ordinary shares. This figure reflects the 3,751 shares received from the restricted stock unit exercise, net of 901 shares withheld to satisfy tax obligations on the vesting event.

Were any of Nancy Lurker’s Alkermes (ALKS) shares sold on the open market?

No open-market sale is reported. The filing shows 901 shares were disposed of under code F at $33.36 per share solely to pay tax liabilities, a standard withholding mechanism, not a discretionary sale into the market by the director.

What are the terms of Nancy Lurker’s restricted stock units at Alkermes (ALKS)?

Each restricted stock unit represents a contingent right to receive one Alkermes ordinary share. According to the footnotes, shares subject to this restricted stock unit award vest in three equal annual installments starting on April 11, 2025, creating staged share delivery over time.

What does transaction code F mean in this Alkermes (ALKS) Form 4?

Transaction code F indicates shares were withheld to pay an exercise price or tax liability. In this case, 901 ordinary shares were withheld at $33.36 per share to satisfy taxes owed on the vesting of the restricted stock units, not sold voluntarily in the market.

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

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Accepted by SEC EDGAR 04/13/2026 - 05:09 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lurker Nancy

(Last) (First) (Middle)

CONNAUGHT HOUSE

1 BURLINGTON ROAD

(Street)

DUBLIN 4 Ireland

(City) (State) (Zip)

IRELAND

(Country)

2. Issuer Name and Ticker or Trading Symbol
Alkermes plc. [ ALKS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	04/11/2026		M		3,751	A	(1)	14,456	D
Ordinary Shares	04/11/2026		F		901	D	$33.36	13,555	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit Award	(1)	04/11/2026		M			3,751	(2)	(2)	Ordinary Shares	3,751	(1)	3,752	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one ordinary share.

2. Shares subject to the restricted stock unit award vest in three equal annual installments commencing on 4/11/2025.

	/s/ Shantale Greenson, attorney-in-fact for Nancy Lurker	04/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)