ALKS / Alkermes plc - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 29, 2025 ALKERMES PUBLIC LIM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 29, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

As filed with the Securities and Exchange Commission on July 29, 2025

As filed with the Securities and Exchange Commission on July 29, 2025 Registration No.

Filing Fee Table.

Calculation of Filing Fee Tables S-8 Alkermes plc. Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity Ordinary Shares, par value $0.01 per share Other 4,250,000 $ 26.29 $ 111,732,500.00 0.0001531 $ 17,106.25 Total Offerin

Alkermes plc Reports Second Quarter 2025 Financial Results — Second Quarter Revenues of $390.7 Million — — GAAP Net Income of $87.1 Million and Diluted GAAP Earnings per Share of $0.52 — — Company Reiterates 2025 Financial Expectations — — Alkermes t

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Second Quarter 2025 Financial Results — Second Quarter Revenues of $390.7 Million — — GAAP Net Income of $87.1 Million and Diluted GAAP Earnings per Share of $0.52 — — Company Reiterates 2025 Financial Expectations — — Alkermes to Present Detailed Vibrance-1 Resul

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name o

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Second Quarter 2025 Financial Results & Business Update July 29, 2025 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Co

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 21, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

Alkermes Announces Positive Topline Results From Vibrance-1 Phase 2 Study of Once-Daily Alixorexton in Patients With Narcolepsy Type 1 – Alixorexton Demonstrated Clinically Meaningful and Statistically Significant Improvements in Wakefulness at All D

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Gretchen Murphy,+1 781 609 6419 Alkermes Announces Positive Topline Results From Vibrance-1 Phase 2 Study of Once-Daily Alixorexton in Patients With Narcolepsy Type 1 – Alixorexton Demonstrated Clinically Meaningful and Statistically Significant Improvements in Wakefulness at All Doses Tested Compared to Placeb

Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.1 ALKERMES PLC 2018 Stock Option and Incentive Plan, as amended SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Alkermes plc 2018 Stock Option and Incentive Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and consultants of Alkermes plc, an Irish public limited company (the “Company”),

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 21, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

First Quarter 2025 Financial Results & Business Update May 1, 2025 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Compa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

Alkermes plc Reports First Quarter 2025 Financial Results — First Quarter Revenues of $306.5 Million — — GAAP Net Income of $22.5 Million and Diluted GAAP Earnings per Share of $0.13 — — Company Reiterates 2025 Financial Expectations —

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports First Quarter 2025 Financial Results — First Quarter Revenues of $306.5 Million — — GAAP Net Income of $22.5 Million and Diluted GAAP Earnings per Share of $0.13 — — Company Reiterates 2025 Financial Expectations — DUBLIN, May 1, 2025 — Alkermes plc (Nasdaq: ALKS)

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 14, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14

PRELIMINARY PROXY STATEMENT SUBJECT TO COMPLETION – DATED MARCH 28, 2025 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment

Table of Contents PRELIMINARY PROXY STATEMENT SUBJECT TO COMPLETION – DATED MARCH 28, 2025 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Alkermes plc Reports Financial Results for the Fourth Quarter and Year Ended Dec. 31, 2024 and Provides Financial Expectations for 2025 — Total Revenues of $1.56 Billion in 2024; Net Sales of Proprietary Products Increased Approximately 18% Year-Over

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Financial Results for the Fourth Quarter and Year Ended Dec. 31, 2024 and Provides Financial Expectations for 2025 — Total Revenues of $1.56 Billion in 2024; Net Sales of Proprietary Products Increased Approximately 18% Year-Over-Year — — GAAP Net Income from Cont

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-35299 ALKERMES PUBLI

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Fourth Quarter and Year-End 2024 Financial Results & Business Update February 12, 2025 Exhibit 99.

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction Alkermes Ireland Holdings Limited Ireland Alkermes Pharma Ireland Limited Ireland Daravita Pharma Ireland Limited Ireland Alkermes Finance Ireland (No 3) Limited Ireland Alkermes Science Four Limited Ireland Alkermes Science Five Limited Ireland Alkermes US Holdings, Inc. Delaware Alkermes, Inc. Pennsylvania Alkermes Controlled Therapeutics, Inc. Pennsyl

Description of Securities.

Exhibit 4.1 DESCRIPTION OF ALKERMES PLC ORDINARY SHARES The following is a summary description of the ordinary shares of Alkermes plc. This summary does not purport to be complete and is qualified in its entirety by reference to the Irish Companies Act 2014 (the “Companies Act”) and the complete text of our memorandum and articles of association, as they may be amended from time to time (together,

Alkermes plc Insider Trading Policy.

Exhibit 19.1 ALKERMES plc INSIDER TRADING POLICY In the normal course of business, officers, directors, employees (including contract employees) and independent contractors of Alkermes plc and its subsidiaries (the “Company”) may come into possession of material, nonpublic information about the Company, its business or other companies with which the Company interacts. This information is legally c

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 12, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

JOINT FILING AGREEMENT

JOINT FILING AGREEMENT The undersigned hereby agree that this Schedule 13G (the “Schedule 13G”) with respect to the common stock of Alkermes Public Limited Company is, and any additional amendment thereto signed by each of the undersigned shall be, filed on behalf of each undersigned pursuant to and in accordance with the provisions of 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that all subsequent amendments to the Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements.

Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements con

Alkermes 2025 Richard Pops Chief Executive Officer 43rd Annual J.P. Morgan Healthcare Conference January 2025 Exhibit 99.1 Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: the company’s expe

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 13, 2025 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Termination of a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 19, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements con

Alkermes 2024: Profitable, Pure-play Neuroscience Company December 2024 Exhibit 99.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 2, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

ALKS / Alkermes plc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Alkermes plc (Name of Issuer) Common Stock (Title of Class of Securities) G01767105 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desig

JOINT FILING AGREEMENT

JOINT FILING AGREEMENT The undersigned hereby agree that this Schedule 13G (the “Schedule 13G”) with respect to the common stock of Alkermes plc is, and any additional amendment thereto signed by each of the undersigned shall be, filed on behalf of each undersigned pursuant to and in accordance with the provisions of 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that all subsequent amendments to the Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact n

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Third Quarter 2024 Financial Results & Business Update October 24, 2024 Exhibit 99.

Alkermes plc Reports Third Quarter 2024 Financial Results — Third Quarter Revenues of $378.1 Million — — Net Sales of Proprietary Products Increased Approximately 18% Year-Over-Year — — GAAP Net Income from Continuing Operations of $92.8 Million and

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Third Quarter 2024 Financial Results — Third Quarter Revenues of $378.1 Million — — Net Sales of Proprietary Products Increased Approximately 18% Year-Over-Year — — GAAP Net Income from Continuing Operations of $92.8 Million and Diluted GAAP Earnings per Share fro

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 24, 2024 ALKERMES PUBLIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 24, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 9, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emplo

Forward-Looking Statements Note Regarding Forward-Looking StatementsCertain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, inc

Alkermes Orexin Portfolio Strategy Review October 9, 2024 Exhibit 99.1 Forward-Looking Statements Note Regarding Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: the company’s expectations r

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) Alkermes Public Limited Company (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Share (2) Maximum Aggregate Offering Price (2) Fee Rate Amount of Registration Fee Equity Ordinary Shares, par value $0.

As filed with the Securities and Exchange Commission on July 24, 2024

As filed with the Securities and Exchange Commission on July 24, 2024 Registration No.

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Second Quarter 2024 Financial Results & Business Update July 24, 2024 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Co

Fifth Amendment to License and Collaboration Agreement between Alkermes Pharma Ireland Limited and Biogen International GmbH (as successor to Biogen Swiss Manufacturing GmbH), effective as of June 7, 2024.

Exhibit 10.1 FIFTH AMENDMENT TO LICENSE AND COLLABORATION AGREEMENT THIS FIFTH AMENDMENT (this “Fifth Amendment”) is made as of the date last signed below (the “Fifth Amendment Effective Date”) to the certain License and Collaboration Agreement dated November 27, 2017, as amended (the “Agreement”), by and between ALKERMES PHARMA IRELAND LIMITED (“Alkermes”) on the one hand and BIOGEN SWISS MANUFAC

Form of Non-Employee Director Non-Qualified Stock Option Award Certificate (rev. 2024) under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.2A 2018 Plan Award Certificate - Non-Employee Director Non-Qualified Stock Option Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the “Grant Date”), you have been granted a non-qualified stock option (the “NQ Option”) to buy [Award Grant Amount] o

Form of Non-Employee Director Restricted Stock Unit Award (Time-Vesting) Award Certificate (rev. 2024) under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.2B 2018 Plan Award Certificate - Non-Employee Director Restricted Stock Unit (Time-Vesting) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Grantee ID Effective [Grant Date] (the “Grant Date”), you have been granted a time-vesting restricted stock unit award (the "RSU"). The RSU is

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 24, 2024 ALKERMES PUBLIC LIM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 24, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name o

Alkermes plc Reports Second Quarter 2024 Financial Results — Second Quarter Revenues of $399.1 Million — — Net Sales of Proprietary Products Increased Approximately 16% Year-Over-Year — — GAAP Net Income from Continuing Operations of $94.7 Million an

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Second Quarter 2024 Financial Results — Second Quarter Revenues of $399.1 Million — — Net Sales of Proprietary Products Increased Approximately 16% Year-Over-Year — — GAAP Net Income from Continuing Operations of $94.7 Million and Diluted GAAP Earnings per Share f

Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.1 ALKERMES PLC 2018 Stock Option and Incentive Plan, as amended SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Alkermes plc 2018 Stock Option and Incentive Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and consultants of Alkermes plc, an Irish public limited company (the “Company”),

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 31, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

Alkermes plc Reports First Quarter 2024 Financial Results — First Quarter Revenues of $350.4 Million — — GAAP Net Income from Continuing Operations of $38.9 Million and Diluted GAAP Earnings per Share from Continuing Operations of $0.23 — — Company R

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports First Quarter 2024 Financial Results — First Quarter Revenues of $350.4 Million — — GAAP Net Income from Continuing Operations of $38.9 Million and Diluted GAAP Earnings per Share from Continuing Operations of $0.23 — — Company Reiterates 2024 Financial Expectatio

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

First Quarter 2024 Financial Results & Business Update May 1, 2024 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Compa

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name

Memorandum and Articles of Association of Alkermes plc (incorporated by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form 10-Q filed on May 1, 2024 (File No. 001-35299)).

Exhibit 3.1 Companies Act 2014 A PUBLIC LIMITED COMPANY CONSTITUTION of ALKERMES PUBLIC LIMITED COMPANY (amended and restated by Special Resolution dated 13 May 2022) Incorporated 4 May 2011 Companies Act 2014 A PUBLIC LIMITED COMPANY MEMORANDUM OF ASSOCIATION of ALKERMES PUBLIC LIMITED COMPANY 1. The name of the Company is Alkermes public limited company. 2. The registered office of the Company s

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

COURTESY COPY OF ALKS_2024_DEF_14A

 ALKERMES PLC Notice of 2024 Annual Meeting Registered in Ireland—No. 498284 Connaught House 1 Burlington Road Dublin 4, Ireland, D04 C5Y6 NOTICE OF 2024 ANNUAL GENERAL MEETING OF SHAREHOLDERS SCHEDULED TO BE HELD MAY 31, 2024 To the Shareholders of Alkermes plc: The 2024 Annual General Meeting of Shareholders (including any adjournments or postponements thereof, the “Annual Meeting”) of Alkermes

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 9, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

Alkermes Announces Positive Topline Results From Phase 1b Study of ALKS 2680 Demonstrating Improved Wakefulness in Patients With Narcolepsy Type 2 and Idiopathic Hypersomnia — Orexin 2 Receptor Agonist ALKS 2680 Demonstrated Clinically Meaningful and

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Gretchen Murphy, +1 781 609 6419 Alkermes Announces Positive Topline Results From Phase 1b Study of ALKS 2680 Demonstrating Improved Wakefulness in Patients With Narcolepsy Type 2 and Idiopathic Hypersomnia — Orexin 2 Receptor Agonist ALKS 2680 Demonstrated Clinically Meaningful and Statistically Significant Im

PRELIMINARY PROXY STATEMENT – SUBJECT TO COMPLETION – DATED APRIL 5, 2024 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment

PRELIMINARY PROXY STATEMENT – SUBJECT TO COMPLETION – DATED APRIL 5, 2024 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 5, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

Alkermes Announces Appointment of Nancy S. Lurker to Board of Directors

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes Announces Appointment of Nancy S. Lurker to Board of Directors DUBLIN, March 7, 2024 — Alkermes plc (Nasdaq: ALKS) today announced the appointment of a new independent director, Nancy S. Lurker, to the company’s Board of Directors (the Board). Ms. Lurker is a seasoned healthc

Alkermes plc Incentive Compensation Recoupment Policy.

Exhibit 97 ALKERMES PLC Incentive Compensation Recoupment Policy 1. Introduction The Board of Directors (the “Board”) of Alkermes plc (the “Company”) has determined that it is in the best interests of the Company and its shareholders to adopt this Incentive Compensation Recoupment Policy (this “Policy”). This Policy provides for the Company’s recoupment of Recoverable Incentive Compensation that i

Purchase and Sale Agreement, dated March 7, 2015, by and among Alkermes Pharma Ireland Limited, Daravita Limited, Eagle Holdings USA, Inc., Recro Pharma, Inc., and Recro Pharma LLC (assigned by Recro to Baudax Bio, Inc. in November 2019).

Exhibit 2.1 Portions of this exhibit (indicated by “[**]”) have been omitted pursuant to Item 601(b)(2)(ii) of Regulation S-K. Schedules and similar attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. PURCHASE AND SALE AGREEMENT by and among ALKERMES PHARMA IRELAND LIMITED, DARAVITA LIMITED, EAGLE HOLDINGS USA, INC., RECRO PHARMA, INC. and RECRO PHARMA LLC D

Form of Restricted Stock Unit (Performance-Vesting) Award Certificate (rev. 2024) under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.25N 2018 Plan Award Certificate – Restricted Stock Unit (Performance-Vesting)(rev. 2024) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Grantee ID Effective [Grant Date] (the “Grant Date”), you have been granted a performance-vesting restricted stock unit award (the “PRSU”). The PR

Asset Purchase Agreement, dated December 13, 2023, by and between Alkermes Pharma Ireland Limited, Novo Nordisk Production Ireland Limited and Novo Nordisk A/S.

Exhibit 10.16 Portions of this exhibit (indicated by “[**]”) have been omitted pursuant to Item 601(b) of Regulation S-K. Schedules and similar attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. ASSET PURCHASE AGREEMENT Dated as of 13 December 2023 Among ALKERMES PHARMA IRELAND LIMITED -and- NOVO NORDISK PRODUCTION IRELAND LIMITED -and- NOVO NORDISK A/S TAB

Memorandum and Articles of Association of Alkermes plc.

Exhibit 3.1 Companies Act 2014 A PUBLIC LIMITED COMPANY CONSTITUTION of ALKERMES PUBLIC LIMITED COMPANY (amended and restated by Special Resolution dated 13 May 2022) Incorporated 4 May 2011 Companies Act 2014 A PUBLIC LIMITED COMPANY MEMORANDUM OF ASSOCIATION of ALKERMES PUBLIC LIMITED COMPANY 1. The name of the Company is Alkermes public limited company. 2. The registered office of the Company s

Third Amendment to Development and License Agreement, dated March 20, 2018, by and between Amylin Pharmaceuticals, LLC and Alkermes Pharma Ireland Limited (as successor-in-interest to Alkermes Controlled Therapeutics Inc. II), amending that certain Development and License Agreement, by and between ACTII and Amylin, dated May 15, 2000, as amended on October 24, 2005 and July 17, 2006.

Exhibit 10.5A Portions of this exhibit (indicated by “[**]”) have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K. Schedules and similar attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. THIRD AMENDMENT TO DEVELOPMENT AND LICENSE AGREEMENT THIS THIRD AMENDMENT TO DEVELOPMENT AND LICENSE AGREEMENT (the “Third Amendment”) is entered into effec

Development and License Agreement, dated as of May 15, 2000, by and between Alkermes Controlled Therapeutics Inc. II and Amylin Pharmaceuticals, Inc., as amended on October 24, 2005 and July 17, 2006 (assigned, as amended, to Alkermes, Inc. in July 2006).

Exhibit 10.5 Portions of this exhibit (indicated by “[**]”) have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K. Schedules and similar attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. DEVELOPMENT AND LICENSE AGREEMENT This Development and License Agreement (“Agreement”) is entered into effective as of May 15, 2000 (the “Effective Date”) be

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction Alkermes Ireland Holdings Limited Ireland Alkermes Pharma Ireland Limited Ireland Daravita Pharma Ireland Limited Ireland Alkermes Finance Ireland (No 3) Limited Ireland Alkermes Science Four Limited Ireland Alkermes Science Five Limited Ireland Alkermes US Holdings, Inc. Delaware Alkermes, Inc. Pennsylvania Alkermes Controlled Therapeutics, Inc. Pennsyl

Form of Restricted Stock Unit (Performance-Vesting) Award Certificate (rev. 2024) for Reporting Officers under the

Exhibit 10.25M 2018 Plan Award Certificate –Performance-Vesting Restricted Stock Unit Award (Reporting Officer)(rev. 2024) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the “Grant Date”), you have been granted a performance-vesting restricted stock unit aw

Amendment to Employee Matters Agreement, dated December 14, 2023, by and between Alkermes plc and Mural Oncology plc.

Exhibit 10.13A AMENDMENT TO EMPLOYEE MATTERS AGREEMENT This amendment (the “Amendment”) to that certain Employee Matters Agreement, dated November 13, 2023 (the “Employee Matters Agreement”), between Alkermes plc (“Alkermes”), an Irish public limited company, and Mural Oncology plc (“Mural”), an Irish public limited company, is entered into as of December 14, 2023 by and among Alkermes and Mural.

Description of Securities.

Exhibit 4.1 DESCRIPTION OF ALKERMES PLC ORDINARY SHARES The following is a summary description of the ordinary shares of Alkermes plc. This summary does not purport to be complete and is qualified in its entirety by reference to the Irish Companies Act 2014 (the “Companies Act”) and the complete text of our memorandum and articles of association, as they may be amended from time to time (together,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-35299 ALKERMES PUBLI

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 15, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements con

Fourth Quarter and Year-End 2023 Financial Results & Business Update February 15, 2024 Exhibit 99.

Alkermes plc Reports Financial Results for the Fourth Quarter and Year Ended Dec. 31, 2023 and Provides Financial Expectations for 2024 — Total Revenues of $1.66 Billion in 2023; Net Sales of Proprietary Products Increased Approximately 18% Year-Over

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Financial Results for the Fourth Quarter and Year Ended Dec. 31, 2023 and Provides Financial Expectations for 2024 — Total Revenues of $1.66 Billion in 2023; Net Sales of Proprietary Products Increased Approximately 18% Year-Over-Year — — GAAP Net Income of $356 M

ALKS / Alkermes plc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0227-alkermesplc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 13)* Name of issuer: Alkermes PLC Title of Class of Securities: Common Stock CUSIP Number: G01767105 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule

ALKS / Alkermes plc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Alkermes Public Limited Company (Name of Issuer) Common Stock (Title of Class of Securities) G01767105 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriat

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 1, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 8, 2024 ALKERMES PUBLIC L

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 8, 2024 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emplo

Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements con

Alkermes 2024: Profitable, Pure-play Neuroscience Company Richard Pops Chief Executive Officer 42nd Annual J.

Alkermes plc Announces Agreement to Sell Athlone, Ireland Facility to Novo Nordisk

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 609 6806 Alkermes plc Announces Agreement to Sell Athlone, Ireland Facility to Novo Nordisk DUBLIN, Dec. 14, 2023—Alkermes plc (Nasdaq: ALKS) today announced that it has entered into a definitive agreement to sell its development and manufacturing facility in Athlone, Ireland to Novo Nordisk,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 13, 2023 ALKERMES PUBLIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 13, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 4, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements con

Alkermes Corporate Presentation November 2023 Exhibit 99.2 Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: the company’s expectations with respect to its current and future financial and op

Transition Services Agreement, dated as of November 13, 2023, by and between Alkermes, Inc. and Mural Oncology, Inc.

Exhibit 10.3 TRANSITION SERVICES AGREEMENT by and between Alkermes, INC. and Mural Oncology, Inc. Dated as of November 13, 2023 TRANSITION SERVICES AGREEMENT TABLE OF CONTENTS Article I DEFINITIONS 1 Section 1.1 General 1 Article II SERVICES 3 Section 2.1 General 3 Section 2.2 Standard for Services 4 Section 2.3 Protection of Alkermes US Information Systems 5 Section 2.4 Transitional Nature of the

Alkermes plc Unaudited Pro Forma Condensed Consolidated Financial Statements

Exhibit 99.3 Alkermes plc Unaudited Pro Forma Condensed Consolidated Financial Statements On November 15, 2023, Alkermes plc (the “Company”) completed the previously announced separation (the “Separation”) of its oncology business into Mural Oncology plc (“Mural”), a new, independent, publicly-traded company whose ordinary shares will trade on the Nasdaq Global Market under the symbol “MURA”. The

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 13, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

Transition Services Agreement, dated as of November 13, 2023, by and between Mural Oncology, Inc. and Alkermes, Inc.

Exhibit 10.4 TRANSITION SERVICES AGREEMENT by and between MURAL ONCOLOGY, INC. and ALKERMES, INC. Dated as of November 13, 2023 TRANSITION SERVICES AGREEMENT TABLE OF CONTENTS Article I DEFINITIONS 1 Section 1.1 General 1 Article II SERVICES 3 Section 2.1 General 3 Section 2.2 Standard for Services 3 Section 2.3 Protection of Mural US Information Systems 4 Section 2.4 Transitional Nature of the Se

Employee Matters Agreement, dated as of November 13, 2023, by and between Alkermes plc and Mural Oncology plc.

Exhibit 10.2 EMPLOYEE MATTERS AGREEMENT by and between ALKERMES PLC and MURAL ONCOLOGY PLC Dated as of November 13, 2023 1 EMPLOYEE MATTERS AGREEMENT TABLE OF CONTENTS Page Article I DEFINITIONS 1 Section 1.1 General 1 Article II TRANSFER OF MURAL EMPLOYEES; GENERAL PRINCIPLES 5 Section 2.1 Transfer of Employment to Mural of Additional Employees; Post-Effective Time Transfers; Independent Contract

Alkermes Completes Separation of Oncology Business — Alkermes Emerges as Pure-Play, Profitable Neuroscience Company — — Alkermes Provides Updated Financial Expectations for 2023 —

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 301 325 3803 Alkermes Completes Separation of Oncology Business — Alkermes Emerges as Pure-Play, Profitable Neuroscience Company — — Alkermes Provides Updated Financial Expectations for 2023 — DUBLIN, Nov. 15, 2023 — Alkermes plc (Nasdaq: ALKS) today announced that it has completed the separation

Separation Agreement, dated as of November 13, 2023, by and between Alkermes plc and Mural Oncology plc.

Exhibit 2.1 SEPARATION AGREEMENT by and between Alkermes PLC and MURAL ONCOLOGY PLC Dated as of November 13, 2023 SEPARATION AGREEMENT TABLE OF CONTENTS Article I DEFINITIONS AND INTERPRETATION 2 Section 1.1 General 2 Section 1.2 References; Interpretation 16 Article II THE SEPARATION 18 Section 2.1 General 18 Section 2.2 Transfer of Assets; Assumption of Liabilities 18 Section 2.3 Treatment of Sh

Tax Matters Agreement, dated November 13, 2023, by and between Alkermes plc and Mural Oncology plc.

Exhibit 10.1 TAX MATTERS AGREEMENT by and between ALKERMES PLC and MURAL ONCOLOGY PLC Dated as of November 13, 2023 TAX MATTERS AGREEMENT ARTICLE I DEFINITIONS 1 Section 1.1 General 1 ARTICLE II LIABILITY FOR TAXES AND DISTRIBUTION LOSSES 10 Section 2.1 General Rule 10 Section 2.2 Allocation Of Taxes For Pre-Distribution Periods 10 ARTICLE III PREPARATION AND FILING OF TAX RETURNS 11 Section 3.1 A

Alkermes Announces Effectiveness of Mural Oncology Form 10 Registration Statement

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes Announces Effectiveness of Mural Oncology Form 10 Registration Statement DUBLIN, Oct. 31, 2023 — Alkermes plc (Nasdaq: ALKS) today announced that the Registration Statement on Form 10, as amended (Form 10), filed by Mural Oncology plc (Mural Oncology) was declared effective b

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 31, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 27, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Supply Agreement, dated September 26, 2003, by and between Acorda Therapeutics, Inc. and Elan Corporation, plc.

Exhibit 10.2 Portions of this exhibit (indicated by “[**]”) have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K. EXECUTION COPY Date: 26, September 2003 ELAN CORPORATION, PLC. AND ACORDA THERAPEUTICS, INC. SUPPLY AGREEMENT Fampridine SR INDEX CLAUSE 1 PRELIMINARY CLAUSE 2 EXCLUSIVE SUPPLY CLAUSE 3 REGULATORY MATTERS CLAUSE 4 FORECASTS AND ORDERS CLAUSE 5 SUPPLY OF THE PRODUCT CLAUS

Development and Supplemental Agreement between Elan Pharma International Limited and Acorda Therapeutics, Inc. dated January 14, 2011.

Exhibit 10.3 Portions of this exhibit (indicated by “[**]”) have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K. Execution Copy ELAN PHARMA INTERNATIONAL LIMITED AND ACORDA THERAPEUTICS, INC. DEVELOPMENT AND SUPPLEMENTAL AGREEMENT TO AMENDED AND RESTATED LICENSE AGREEMENT DATED 26 SEPTEMBER 2003 AS AMENDED AND SUPPLY AGREEMENT DATED 26 SEPTEMBER 2003 Fampridine QD formulation 1. De

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact n

Confidential Settlement and License Agreement, dated August 29, 2023, by and among Alkermes, Inc., Alkermes Pharma Ireland Limited and Teva Pharmaceuticals USA, Inc.

Exhibit 10.1 Execution Version Portions of this exhibit (indicated by asterisks) have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K. CONFIDENTIAL SETTLEMENT AND LICENSE AGREEMENT This Confidential Settlement And License Agreement (the “Settlement Agreement”) is hereby entered into on August 29, 2023 (“Execution Date”) by and among ALKERMES, INC., a Pennsylvania corporation with a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 25, 2023 ALKERMES PUBLIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 25, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Third Quarter 2023 Financial Results & Business Update October 25, 2023 Exhibit 99.

Alkermes plc Reports Third Quarter 2023 Financial Results — Third Quarter Revenues of $380.9 Million; Net Sales of Proprietary Products Increased Approximately 16% Year-Over-Year — — GAAP Net Income of $47.8 Million and Non-GAAP Net Income of $109.5

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Third Quarter 2023 Financial Results — Third Quarter Revenues of $380.9 Million; Net Sales of Proprietary Products Increased Approximately 16% Year-Over-Year — — GAAP Net Income of $47.8 Million and Non-GAAP Net Income of $109.5 Million — — Company Reiterates Fina

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 23, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Alkermes Presents First Clinical Data for Orexin 2 Receptor Agonist ALKS 2680 at World Sleep Congress — Initial ALKS 2680 Data Demonstrated Dose-Dependent, Significantly Improved Sleep Latency Compared to Placebo in Narcolepsy Type 1 — — ALKS 2680 Wa

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Gretchen Murphy, +1 781 609 6419 Alkermes Presents First Clinical Data for Orexin 2 Receptor Agonist ALKS 2680 at World Sleep Congress — Initial ALKS 2680 Data Demonstrated Dose-Dependent, Significantly Improved Sleep Latency Compared to Placebo in Narcolepsy Type 1 — — ALKS 2680 Was Generally Well Tolerated at

Financial Relationship Disclosure Ineligible companies are those whose primary business is producing, marketing, selling, re-selling, or distributing health care products used by, or on patients. ◻︎ No, I HAVE NOT had a financial relationship with an

Brendon Yee,1 Julia Chapman,1 Ron Grunstein,1 Christopher Argent,2 Angela D’Rozario,1 Craig Hopkinson,3 Jandira Ramos,3 Ishani Landry,3 Sergey Yagoda,3 Bhaskar Rege3 1Woolcock Institute of Medical Research, Sydney, Australia; 2Scientia Clinical Research, Ltd.

Alkermes Announces Settlement With Teva Related to VIVITROL® Patent Litigation — Company Grants Teva a License to Market Generic VIVITROL Beginning in January 2027 —

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Marisa Borgasano +1 781 609 6659 Alkermes Announces Settlement With Teva Related to VIVITROL® Patent Litigation — Company Grants Teva a License to Market Generic VIVITROL Beginning in January 2027 — DUBLIN, August 30, 2023 - Alkermes plc (Nasdaq: ALKS) announced today that the company entered into a settlement a

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 29, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emplo

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

SC 13D/A 1 brhc20057973sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 16)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name o

Amendment No. 7, dated as of June 28, 2023, to Amended and Restated Credit Agreement, dated as of September 16, 2011, as amended and restated on September 25, 2012, as further amended by Amendment No. 2 on February 14, 2013, as amended by Amendment No. 3 and Waiver to Amended and Restated Credit Agreement dated as of May 22, 2013, as amended by Amendment No. 4 dated as of October 12, 2016, as amended by Amendment No. 5 dated as of March 26, 2018, and as amended by Amendment No. 6 dated as of March 12, 2021, among Alkermes, Inc., Alkermes plc, the guarantors party thereto, the lenders party thereto and Morgan Stanley Senior Funding, Inc. as Administrative Agent and Collateral Agent.

Exhibit 10.1 AMENDMENT NO. 7 TO AMENDED AND RESTATED CREDIT AGREEMENT AMENDMENT NO. 7 TO AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”) dated as of June 28, 2023 is entered into by and among Alkermes, Inc., a corporation organized under the laws of the Commonwealth of Pennsylvania (the “Borrower”), Alkermes plc, a company incorporated under the laws of the Republic of Ireland (“Holdings”

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) Alkermes Public Limited Company (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Share(2) Maximum Aggregate Offering Price(2) Fee Rate Amount of Registration Fee(4) Equity Ordinary Shares, par value $0.

As filed with the Securities and Exchange Commission on July 26, 2023

As filed with the Securities and Exchange Commission on July 26, 2023 Registration No.

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Second Quarter 2023 Financial Results & Business Update July 26, 2023 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Co

Alkermes plc Reports Second Quarter 2023 Financial Results — Second Quarter Revenues of $617.4 Million Reflect Strong Performance of Proprietary Product Portfolio and Reinstatement of Long-Acting INVEGA® Product Royalties — — Net Sales of Proprietary

Exhibit 99.1 ale Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Second Quarter 2023 Financial Results — Second Quarter Revenues of $617.4 Million Reflect Strong Performance of Proprietary Product Portfolio and Reinstatement of Long-Acting INVEGA® Product Royalties — — Net Sales of Proprietary Products Increased Approximate

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 26, 2023 ALKERMES PUBLIC LIM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 26, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 29, 2023 ALKERMES PUBLIC LIM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 29, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.1 ALKERMES PLC 2018 Stock Option and Incentive Plan, as amended SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Alkermes plc 2018 Stock Option and Incentive Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and consultants of Alkermes plc, an Irish public limited company (the “Company”),

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 28, 2023 ALKERMES PUBLIC LIM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 28, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 15)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy S

Exhibit 11

EX-99.11 2 brhc20055088ex99-11.htm EXHIBIT 11 EXHIBIT 11 SARISSA CAPITAL URGES ALKERMES SHAREHOLDERS TO VOTE “FOR” SARAH SCHLESINGER AND “WITHHOLD” INCUMBENT DIRECTOR RICHARD GAYNOR Independent proxy advisory firm ISS also recommends voting “FOR” Sarah Schlesinger and “WITHHOLD” Richard Gaynor Sarissa believes adding Sarah Schlesinger to the Alkermes board can unlock shareholder value and help Alk

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy S

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 14)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 2

Exhibit 10

EXHIBIT 10 SARISSA ISSUES PRESENTATION HIGHLIGHTING SARISSA NOMINEES ARE QUALIFIED TO CREATE VALUE FOR ALKERMES SHAREHOLDERS Independent proxy advisory firm ISS recognizes the qualifications of Sarissa nominees and advises shareholders to support Sarah Schlesinger In light of upcoming oncology spin, ISS recommends that shareholders withhold support from cancer specialist Richard Gaynor Greenwich, CT, June 26, 2023 – Sarissa Capital Management LP (“Sarissa”) today issued a presentation detailing the need for shareholder representation on the board of Alkermes plc (NASDAQ: ALKS) accessible at the link below: Presentation: https://upgradealkermes.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

Exhibit 9

EXHIBIT 9 INDEPENDENT PROXY ADVISORY FIRM ISS AGREES WITH SARISSA CAPITAL THAT SHAREHOLDERS’ INTERESTS WOULD BE BEST SERVED WITH DIRECT SHAREHOLDER REPRESENTATION ON THE ALKERMES BOARD Questions the integrity of Chairman and CEO Richard Pops and the accuracy of what management has communicated to the Alkermes Board Concludes that Alkermes’ leadership lacks either the ability or desire to manage it

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 13)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Exhibit 8

EXHIBIT 8 INDEPENDENT PROXY ADVISORY FIRM ISS CONCLUDES THAT SARISSA CAPITAL HAS MADE A COMPELLING CASE FOR CHANGE TO THE ALKERMES BOARD ISS recommends that Alkermes shareholders vote the Blue Card “FOR” the election of Sarissa nominee Dr.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 12)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy S

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 11)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 2

Exhibit 7

EX-99.7 2 ny20009418x10ex7.htm EXHIBIT 7 EXHIBIT 7 SARISSA ISSUES PRESENTATION HIGHLIGHTING THE NEED FOR SHAREHOLDER REPRESENTATION ON THE ALKERMES BOARD Sarissa believes Chairman and CEO Richard Pops wants to prevent accountability and oversight that would come from Sarissa representation on the Alkermes board Sarissa believes Chairman and CEO Richard Pops will never run Alkermes for the benefit

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☐ Filed by a party other than the Registrant ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 10)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

Exhibit 6

EXHIBIT 6 SARISSA URGES SHAREHOLDERS TO VOTE FOR SARISSA NOMINEES TO PROVIDE MUCH NEEDED OVERSIGHT AND ACCOUNTABILITY TO ALKERMES Sarissa does not understand why the Alkermes independent directors refuse to add Sarissa representatives to the board Sarissa believes the addition of its representatives to the Alkermes board can unlock shareholder value and allow Alkermes to achieve its true potential Greenwich, CT, June 13, 2023 – Sarissa Capital today released the following letter to shareholders of Alkermes plc (NASDAQ: ALKS): June 13, 2023 Dear Fellow Alkermes Shareholders: We are one of Alkermes’ largest, long-term shareholders, owning nearly $450 million of stock.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant  ☐ Filed by a party other than the Registrant  ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Sta

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 9)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 20

SARISSA CAPITAL HIGHLIGHTS MISLEADING CLAIMS MADE BY ALKERMES IN ITS ATTEMPT TO THWART SHAREHOLDER REPRESENTATION ON THE BOARD

EXHIBIT 5 SARISSA CAPITAL HIGHLIGHTS MISLEADING CLAIMS MADE BY ALKERMES IN ITS ATTEMPT TO THWART SHAREHOLDER REPRESENTATION ON THE BOARD Greenwich, CT, June 9, 2023 – Sarissa Capital Management LP (“Sarissa”) today issued a presentation detailing the need for shareholder representation on the board of Alkermes (NASDAQ: ALKS) accessible at the link below: Presentation: https://upgradealkermes.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 defa14a6-12-23.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as p

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐   Preliminary Proxy Statement ☐   Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐   Definitive P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 alkermes-defa14a060823.htm ADDITIONAL DEFINITIVE MATERIAL UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for U

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 alkermes-defa14a060823.htm ADDITIONAL DEFINITIVE MATERIAL UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for U

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 31, 2023 ALKERMES PUBLIC LIMI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 31, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

Alkermes Announces Final Award in Janssen Pharmaceutica Arbitration and Provides Updated Financial Expectations — Company Raises 2023 Revenue and GAAP Net Income Expectations by Approximately $425 Million — — Conference Call Scheduled for Today at 8:

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Katie Joyce, +1 781 249 8927 Alkermes Announces Final Award in Janssen Pharmaceutica Arbitration and Provides Updated Financial Expectations — Company Raises 2023 Revenue and GAAP Net Income Expectations by Approximately $425 Million — — Conference Call Scheduled for Today at 8:00 a.m. ET — DUBLIN, June 6, 2023

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☐ Filed by a party other than the Registrant ☒ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

Exhibit 4

EXHIBIT 4 SARISSA URGES ALKERMES SHAREHOLDERS TO VOTE THE UNIVERSAL BLUE CARD TO UPGRADE ALKERMES FOR THE BENEFIT OF SHAREHOLDERS Sarissa believes its nominees have experience and skills that the current board lacks Sarissa does not understand why the Alkermes independent directors refuse to add any Sarissa representatives to the board Greenwich, CT, June 5, 2023 – Sarissa Capital today released the following letter to shareholders of Alkermes plc (NASDAQ: ALKS): June 5, 2023 Dear Fellow Alkermes Shareholders: We are long-term Alkermes shareholders owning over $400 million in stock who believe that the company is significantly undervalued and not run optimally.

Exhibit 1

Exhibit 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant   ☐ Filed by a party other than the Registrant   ☒ Check the appropriate box: ☐   Preliminary Proxy Statement ☐   Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐   Definitive P

ALKS / Alkermes plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 8)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 20

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFC14A 1 ny20009048x4defc14a.htm DEFC14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant  ☐ Filed by a party other than the Registrant ☒ Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14

DEFC14A

Table of Contents 2023 Proxy Statement and Notice of Annual General MeetingTable of Contents ALKERMES PLC Notice of 2023 Annual Meeting Registered in Ireland—No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant  ☐ Filed by a party other than the Registrant ☒ Check the appropriate box: ☒ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))  ☐ D

PRELIMINARY PROXY STATEMENT — SUBJECT TO COMPLETION — DATED MAY 19, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment

Table of Contents PRELIMINARY PROXY STATEMENT — SUBJECT TO COMPLETION — DATED MAY 19, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

* * * * *

SIDLEY AUSTIN LLP 787 SEVENTH AVENUE NEW YORK, NY 10019 +1 212 839 5300 +1 212 839 5599 FAX AMERICA • ASIA PACIFIC • EUROPE May 19, 2023 Via EDGAR, Email and FedEx Christina Chalk United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant  ☐ Filed by a party other than the Registrant ☒ Check the appropriate box: ☒ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))  ☐ Definitive Proxy St

Alkermes Files Preliminary Proxy Statement and Provides Update on Annual Director Nomination Process

Exhibit 99.1 Alkermes Files Preliminary Proxy Statement and Provides Update on Annual Director Nomination Process DUBLIN, May 8, 2023 – Alkermes plc (Nasdaq: ALKS) today filed its preliminary proxy statement with the U.S. Securities and Exchange Commission (SEC) in connection with its upcoming Annual General Meeting of Shareholders (the Annual Meeting). The company also provided an update on its a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2023 ALKERMES PUBLIC LIMIT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2023 ALKERMES PUBLIC LIMIT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

PRELIMINARY PROXY STATEMENT – SUBJECT TO COMPLETION – DATED MAY 8, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment N

Table of Contents PRELIMINARY PROXY STATEMENT – SUBJECT TO COMPLETION – DATED MAY 8, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Alkermes Files Preliminary Proxy Statement and Provides Update on Annual Director Nomination Process

Exhibit 99.1 Alkermes Files Preliminary Proxy Statement and Provides Update on Annual Director Nomination Process DUBLIN, May 8, 2023 – Alkermes plc (Nasdaq: ALKS) today filed its preliminary proxy statement with the U.S. Securities and Exchange Commission (SEC) in connection with its upcoming Annual General Meeting of Shareholders (the Annual Meeting). The company also provided an update on its a

Alkermes plc Reports First Quarter 2023 Financial Results — First Quarter Revenues of $287.6 Million Reflect Strong Performance of Proprietary Product Portfolio — — GAAP Loss per Share of $0.25 and Basic and Diluted Non-GAAP Earnings per Share of $0.

Exhibit 99.1 alex Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports First Quarter 2023 Financial Results — First Quarter Revenues of $287.6 Million Reflect Strong Performance of Proprietary Product Portfolio — — GAAP Loss per Share of $0.25 and Basic and Diluted Non-GAAP Earnings per Share of $0.01 — — Planned Separation of O

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

First Quarter 2023 Financial Results & Business Update April 26, 2023 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Co

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1) (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 26, 2023 ALKERMES PUBLIC LI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 26, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employ

License Agreement by and among Elan Pharmaceutical Research Corp., d/b/a Nanosystems and Elan Pharma International Limited and Janssen Pharmaceutica N.V. dated as of March 31, 1999.

Exhibit 10.1 In accordance with Item 601(b)(2)(ii) of Regulation S-K, certain information (indicated by “[**]”) has been excluded from this exhibit because it is both not material and would likely cause competitive harm to the registrant if publicly disclosed. LICENSE AGREEMENT by and among ELAN PHARMACEUTICAL RESEARCH CORP., d/b/a NANOSYSTEMS and ELAN PHARMA INTERNATIONAL LIMITED and JANSSEN PHAR

Agreement Amendment No. 2, dated as of July 31, 2009, to the License Agreement by and among Elan Pharmaceutical Research Corp., d/b/a Nanosystems and Elan Pharma International Limited and Janssen Pharmaceutica N.V. dated as of March 31, 1999, as amended by the First Amendment, dated as of July 31, 2003.

Exhibit 10.2 In accordance with Item 601(b)(2)(ii) of Regulation S-K, certain information (indicated by “[**]”) has been excluded from this exhibit because it is both not material and would likely cause competitive harm to the registrant if publicly disclosed. “Agreement Amendment No. 2” [17 March, 2011] Janssen Pharmaceutica N.V. Turnhoutseweg 30 B-2340 Beerse Belgium Elan Drug Delivery, Inc. 350

Alkermes Announces Second Interim Award in Janssen Pharmaceutica Arbitration

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Katie Joyce, +1 781 249 8927 Alkermes Announces Second Interim Award in Janssen Pharmaceutica Arbitration DUBLIN, April 25, 2023 – Alkermes plc (Nasdaq: ALKS) today announced that on April 19, 2023 it received a second interim award (the “Second Interim Award”) from the arbitral tribunal (the “Tribunal”) in its

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 19, 2023 ALKERMES PUBLIC LI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 19, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employ

Form of Restricted Stock Unit (Time-Vesting) Award Certificate for Reporting Officers under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.19-11 2018 Plan Award Certificate –Time-Vesting Restricted Stock Unit Award (Reporting Officer) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the “Grant Date”), you have been granted a time-vesting restricted stock unit award (the "RSU"). The RS

List of subsidiaries

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction Alkermes Ireland Holdings Limited Ireland Alkermes Pharma Ireland Limited Ireland Daravita Pharma Ireland Limited Ireland Alkermes Finance Ireland (No 3) Limited Ireland Alkermes Science Four Limited Ireland Alkermes Science Five Limited Ireland Alkermes US Holdings, Inc. Delaware Alkermes, Inc. Pennsylvania Alkermes Controlled Therapeutics, Inc. Pennsyl

Form of Non-Qualified Stock Option Award Certificate for Reporting Officers under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

EX-10.19 4 alks-ex1019342.htm EX-10.19-10 Exhibit 10.19-10 2018 Plan Award Certificate –Non-Qualified Stock Option (Reporting Officer) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the “Grant Date”), you have been granted a non-qualified stock option (the

Description of Securities.

Exhibit 4.1 DESCRIPTION OF ALKERMES PLC ORDINARY SHARES The following is a summary description of the ordinary shares of Alkermes plc. This summary does not purport to be complete and is qualified in its entirety by reference to the Irish Companies Act 2014 (the “Companies Act”) and the complete text of our memorandum and articles of association, as they may be amended from time to time (together,

Form of Incentive Stock Option Award Certificate for Reporting Officers under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.19-9 2018 Plan Award Certificate – Incentive Stock Option (Reporting Officer) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the “Grant Date”), you have been granted an incentive stock option (the “Incentive Stock Option”) to buy [Award Grant Amo

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 16, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-35

Alkermes plc Reports Financial Results for the Fourth Quarter and Year Ended Dec. 31, 2022 and Provides Financial Expectations for 2023 — Revenues of $1.11 Billion in 2022, GAAP Loss per Share of $0.97 and Diluted Non-GAAP Earnings per Share of $0.34

EX-99.1 2 alks-ex9917.htm EX-99.1 Exhibit 99.1 alex Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Financial Results for the Fourth Quarter and Year Ended Dec. 31, 2022 and Provides Financial Expectations for 2023 — Revenues of $1.11 Billion in 2022, GAAP Loss per Share of $0.97 and Diluted Non-GAAP Earnings per Share of $

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Fourth Quarter and Year-End 2022 Financial Results & Business Update February 16, 2023 Exhibit 99.

Form of Restricted Stock Unit (Performance-Vesting) Award Certificate for Reporting Officers under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.19-12 2018 Plan Award Certificate –Performance-Vesting Restricted Stock Unit Award (Reporting Officer) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the “Grant Date”), you have been granted a performance-vesting restricted stock unit award (the

ALKS / Alkermes Plc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: Alkermes plc Title of Class of Securities: Common Stock CUSIP Number: G01767105 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 3, 2023 ALKERMES PUBLIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 3, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

ALKS / Alkermes Plc / Sarissa Capital Management LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 7)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 20

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 3, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

ALKS / Alkermes Plc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 21 )* Alkermes Public Limited Company (Name of Issuer) Common Stock (Title of Class of Securities) G01767105 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 9, 2023 ALKERMES PUBLIC L

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 9, 2023 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emplo

Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements con

EX-99.1 2 alks-ex99125.htm EX-99.1 Richard Pops Chief Executive Officer A Clear Investment Thesis January 2023 41st Annual J.P. Morgan Healthcare Conference Exhibit 99.1 Forward-Looking Statements Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limite

Other Events

alks-8k20221221.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 21, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 13, 2022 ALKERMES PUBLIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 13, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Emp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact n

Fourth Amendment to License and Collaboration Agreement between Alkermes Pharma Ireland Limited and Biogen Swiss Manufacturing GmbH, effective as of August 25, 2022.

Exhibit 10.1 In accordance with Item 601(b)(2)(ii) of Regulation S-K, certain information (indicated by ?[**]?) has been excluded from this exhibit because it is both not material and would likely cause competitive harm to the registrant if publicly disclosed. FOURTH AMENDMENT TO LICENSE AND COLLABORATION AGREEMENT THIS FOURTH AMENDMENT (this ?Amendment?) is made and entered into as of August 25,

Alkermes plc Announces Intent to Separate Oncology Business — Alkermes to Focus on Profitable Growth of Pure-Play, Commercial-Stage Neuroscience Business — — Separation Expected to Unlock Value Through Sharpened Strategic Focus, Simplified Capital Al

Exhibit 99.3 ale Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Announces Intent to Separate Oncology Business ? Alkermes to Focus on Profitable Growth of Pure-Play, Commercial-Stage Neuroscience Business ? ? Separation Expected to Unlock Value Through Sharpened Strategic Focus, Simplified Capital Allocation Decision-Making, and D

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 2, 2022 ALKERMES PUBLIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 2, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

Alkermes plc Reports Third Quarter 2022 Financial Results — Third Quarter Revenues of $252.4 Million Reflect Strong Year-Over-Year Growth of Proprietary Commercial Product Portfolio — — GAAP Loss per Share of $0.39 and Non-GAAP Earnings per Share of

Exhibit 99.1 ale Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Third Quarter 2022 Financial Results ? Third Quarter Revenues of $252.4 Million Reflect Strong Year-Over-Year Growth of Proprietary Commercial Product Portfolio ? ? GAAP Loss per Share of $0.39 and Non-GAAP Earnings per Share of $0.02 ? ? Company Announces Int

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Proposed Separation of Oncology Business & Third Quarter 2022 Financial Results November 2, 2022 Exhibit 99.

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 13, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Empl

ALKS / Alkermes Plc / Sarissa Capital Management LP - SCHEDULE 13D (AMENDMENT NO. 6) Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.6)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 203

Form of Non-Employee Director New Director Grant Non-Qualified Stock Option Award Certificate under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.1.1 2018 Plan Award Certificate ? Non-Employee Director New Director Grant Non-Qualified Stock Option Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Optionee ID Effective [Grant Date] (the ?Grant Date?), you have been granted a non-qualified stock option (the ?NQ Option?) to buy [A

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 27, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employe

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) Alkermes Public Limited Company (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Share(2) Maximum Aggregate Offering Price(2) Fee Rate Amount of Registration Fee(4) Equity Ordinary Shares, par value $0.

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

Second Quarter 2022 Financial Results & Business Update July 27, 2022 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute ?forward-looking statements? within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc?s (the ?Co

Form of Non-Employee Director New Director Grant Restricted Stock Unit (Time-Vesting) Award Certificate under the Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.1.2 2018 Plan Award Certificate ? Non-Employee Director New Director Grant Restricted Stock Unit (Time-Vesting) Alkermes plc Connaught House 1 Burlington Road Dublin 4, Ireland Name: Participant Name Address: Participant Address Grant ID: Grant ID Plan: Plan ID ID: Grantee ID Effective [Grant Date] (the ?Grant Date?), you have been granted a time-vesting restricted stock unit award (the

Alkermes plc Reports Second Quarter 2022 Financial Results — Second Quarter Revenues of $276.2 Million Reflect Strong Growth in Proprietary Net Sales — — GAAP Loss per Share of $0.18 and Non-GAAP Earnings per Share of $0.06 — — Raises Financial Expec

Exhibit 99.1 alex Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports Second Quarter 2022 Financial Results ? Second Quarter Revenues of $276.2 Million Reflect Strong Growth in Proprietary Net Sales ? ? GAAP Loss per Share of $0.18 and Non-GAAP Earnings per Share of $0.06 ? ? Raises Financial Expectations for Full-Year 2022 ? D

Memorandum and Articles of Association of Alkermes plc.

Exhibit 3.1 Companies Act 2014 A PUBLIC LIMITED COMPANY CONSTITUTION of ALKERMES PUBLIC LIMITED COMPANY (amended and restated by Special Resolution dated 13 May 2022) Incorporated 4 May 2011 Companies Act 2014 A PUBLIC LIMITED COMPANY MEMORANDUM OF ASSOCIATION of ALKERMES PUBLIC LIMITED COMPANY 1. The name of the Company is Alkermes public limited company. 2. The registered office of the Company s

As filed with the Securities and Exchange Commission on July 27, 2022

As filed with the Securities and Exchange Commission on July 27, 2022 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name o

Alkermes plc 2018 Stock Option and Incentive Plan, as amended.

Exhibit 10.1 ALKERMES PLC 2018 Stock Option and Incentive Plan, as amended SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Alkermes plc 2018 Stock Option and Incentive Plan (the ?Plan?). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and consultants of Alkermes plc, an Irish public limited company (the ?Company?),

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 7, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

Alkermes Announces Results of Annual General Meeting of Shareholders All Board Nominees Overwhelmingly Elected by Shareholders

Exhibit 99.1 Alkermes Announces Results of Annual General Meeting of Shareholders All Board Nominees Overwhelmingly Elected by Shareholders DUBLIN, July 7, 2022 ? Alkermes plc (Nasdaq: ALKS) today announced the results of its 2022 Annual General Meeting of Shareholders (the ?Annual Meeting?) held July 7, 2022. All four of the Board?s nominees ? Emily Peterson Alva, Cato T. Laurencin, M.D., Ph.D.,

ALKS / Alkermes Plc / Sarissa Capital Management LP - SCHEDULE 13D/A, AMENDMENT #5 Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 5)* Alkermes Public Limited Company (Name of Issuer) Ordinary shares, $0.01 par value (Title of Class of Securities) G01767105 (CUSIP Number) Mark DiPaolo Senior Partner, General Counsel Sarissa Capital Management LP 660 Steamboat Road Greenwich, CT 06830 20

Exhibit 3

EXHIBIT 3 SARISSA CAPITAL COMMENTS ON ALKERMES ANNUAL MEETING Sarissa concerned that Alkermes Board is being unduly influenced by CEO Richard Pops Sarissa supports new Alkermes directors to step up and act for the benefit of shareholders Sarissa is considering taking action under Irish law to selectively remove and replace Alkermes directors Greenwich, CT, July 6, 2022 ? Sarissa Capital Management LP (?Sarissa?) today made the following statement on Alkermes PLC (NASDAQ: ALKS) regarding how it intends to vote at the upcoming Alkermes annual meeting and the reasons therefor: Richard Pops, the CEO and Chairman of Alkermes, has presided over tremendous shareholder value destruction since becoming CEO of Alkermes over thirty years ago.

DEFC14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

Alkermes Announces Continued Board Refreshment, Including the Appointment of Christopher I. Wright, M.D., Ph.D. to its Board of Directors – Appoints Nancy J. Wysenski as New Lead Independent Director – – David W. Anstice AO and Wendy L. Dixon, Ph.D.

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Katie Joyce, +1 781 249 8927 Alkermes Announces Continued Board Refreshment, Including the Appointment of Christopher I. Wright, M.D., Ph.D. to its Board of Directors ? Appoints Nancy J. Wysenski as New Lead Independent Director ? ? David W. Anstice AO and Wendy L. Dixon, Ph.D. to Retire From Board ? ? Files Pr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 24, 2022 ALKERMES PUBLIC LIMI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 24, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 24, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

Alkermes Announces Continued Board Refreshment, Including the Appointment of Christopher I. Wright, M.D., Ph.D. to its Board of Directors – Appoints Nancy J. Wysenski as New Lead Independent Director – – David W. Anstice AO and Wendy L. Dixon, Ph.D.

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs, +1 781 609 6377 For Media: Katie Joyce, +1 781 249 8927 Alkermes Announces Continued Board Refreshment, Including the Appointment of Christopher I. Wright, M.D., Ph.D. to its Board of Directors ? Appoints Nancy J. Wysenski as New Lead Independent Director ? ? David W. Anstice AO and Wendy L. Dixon, Ph.D. to Retire From Board ? ? Files Pr

PRELIMINARY PROXY STATEMENT – SUBJECT TO COMPLETION – DATED MAY 26, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment

Table of Contents PRELIMINARY PROXY STATEMENT ? SUBJECT TO COMPLETION ? DATED MAY 26, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 13, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 13, 2022 ALKERMES PUBLIC LIMI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 13, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A (Amendment No. 1) (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 27, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35299 ALKERMES PUBLIC LIMITED COMPANY (Exact name

Alkermes plc Reports First Quarter 2022 Financial Results — First Quarter Revenues of $278.5 Million Reflect Strong Performance of LYBALVI®, ARISTADA® and VIVITROL® — — GAAP Loss per Share of $0.22 and Basic and Diluted Non-GAAP Earnings per Share of

Exhibit 99.1 alex Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Reports First Quarter 2022 Financial Results — First Quarter Revenues of $278.5 Million Reflect Strong Performance of LYBALVI®, ARISTADA® and VIVITROL® — — GAAP Loss per Share of $0.22 and Basic and Diluted Non-GAAP Earnings per Share of $0.12 — — Financial Expectati

Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including,

First Quarter 2022 Financial Results & Business Update April 27, 2022 Exhibit 99.2 Forward-Looking Statements and Non-GAAP Financial Information Certain statements set forth in this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, but not limited to, statements concerning: Alkermes plc’s (the “Co

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 19, 2022 ALKERMES PUBLIC LIMITED COMPANY (Exact name of registrant as specified in its charter) Ireland 001-35299 98-1007018 (State or other jurisdiction (Commission (IRS Employ

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