T. Rowe Price (NASDAQ: ALKS) holds 4.66M shares, 2.8% stake

Rhea-AI Filing Summary

ALKERMES PLC reported a Schedule 13G/A amendment showing T. Rowe Price Associates, Inc. beneficially owned 4,664,563 shares of Common Stock, representing 2.8% of the class as stated in the filing. The filing lists sole voting power of 4,650,687 shares and sole dispositive power of 4,664,563. The report is signed by Ellen York, Vice President, dated 05/15/2026.

Insights

Institutional Ownership Analyst

T. Rowe Price reports a passive stake of 2.8% in ALKERMES PLC.

The amendment to Schedule 13G/A states T. Rowe Price Associates, Inc. beneficially owns 4,664,563 shares representing 2.8% of common stock, with 4,650,687 shares showing sole voting power. The filing affirms the filer denies beneficial ownership in its boilerplate clause.

Ownership at this scale is typical for institutional holders filing under Schedule 13G/A. Subsequent filings may show changes in position; any change in reported percent or voting/dispositive power would be disclosed in future amendments.

Key Figures

Beneficial ownership: 4,664,563 shares Percent of class: 2.8% Sole voting power: 4,650,687 shares +3 more

6 metrics

Beneficial ownership 4,664,563 shares Amount beneficially owned as reported in Item 4

Percent of class 2.8% Percent of class as reported in Item 4(b)

Sole voting power 4,650,687 shares Shares with sole power to vote as reported in Item 4(c)(i)

Sole dispositive power 4,664,563 shares Shares with sole power to dispose as reported in Item 4(c)(iii)

CUSIP G01767105 CUSIP for ALKERMES PLC common stock on cover line

Signature date 05/15/2026 Date on the signed Schedule 13G/A amendment

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 2 ALKERMES PLC COMMON STOCK"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned regulatory

"Amount beneficially owned: 4664563"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 4664563"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

ALKERMES PLC

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

G01767105

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G01767105

1

Names of Reporting Persons

T. Rowe Price Associates, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MARYLAND

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,650,687.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,664,563.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,664,563.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

2.8 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ALKERMES PLC
(b)	Address of issuer's principal executive offices: CONNAUGHT HOUSE, 1 BURLINGTON ROAD, DUBLIN, L2, 0000
Item 2.
(a)	Name of person filing: T. Rowe Price Associates, Inc.
(b)	Address or principal business office or, if none, residence: 1307 Point Street, Baltimore, MD 21231
(c)	Citizenship: Maryland
(d)	Title of class of securities: COMMON STOCK
(e)	CUSIP No.: G01767105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4664563
(b)	Percent of class: 2.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 4650687
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4664563
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. T. Rowe Price Associates, Inc. hereby declares and affirms that the filing of Schedule 13G shall not be construed as an admission that Price Associates is the beneficial owner of the securities referred to, which beneficial ownership is expressly denied.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

T. Rowe Price Associates, Inc.

Signature:	Ellen York
Name/Title:	Vice President
Date:	05/15/2026

FAQ

What stake does T. Rowe Price report in ALKS?

T. Rowe Price Associates, Inc. reports beneficial ownership of 4,664,563 shares, representing 2.8% of ALKERMES PLC common stock as stated in the amendment.

How many shares does T. Rowe Price have voting power over in ALKS?

The filing shows sole voting power over 4,650,687 shares and sole dispositive power over 4,664,563 shares, per the Schedule 13G/A amendment.

When was the Schedule 13G/A amendment for ALKS signed?

The Schedule 13G/A amendment is signed by Ellen York, Vice President, with the signature date listed as 05/15/2026 in the filing excerpt.

Does T. Rowe Price claim beneficial ownership of ALKS shares?

The filing includes a statement where T. Rowe Price "expressly denied" beneficial ownership for purposes of the filing while still reporting the share counts and powers as required.

Is T. Rowe Price an individual or institutional filer in the ALKS filing?

The filer is institutional: T. Rowe Price Associates, Inc. with citizenship/place of organization listed as Maryland and address in Baltimore, MD.