Sec Form 4 Filing - BERNLOHR TIMOTHY J @ Smurfit WestRock plc - 2024-07-05

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BERNLOHR TIMOTHY J 2. Issuer Name and Ticker or Trading Symbol Smurfit WestRock plc [ SW] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) BEECH HILL, CLONSKEAGH 3. Date of Earliest Transaction (MM/DD/YY) 07/05/2024 (Street) DUBLIN 4, L2D04 N2R2 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Ordinary Shares 07/05/2024 A 45,666 A 45,666 D Ordinary Shares 07/05/2024 A 4,190 A 49,856 D

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BERNLOHR TIMOTHY J BEECH HILL CLONSKEAGH DUBLIN 4, L2D04 N2R2 X Signatures /s/ Ciara O'Riordan, attorney-in-fact for Timothy J. Bernlohr 07/09/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Transaction Agreement, dated as of September 12, 2023 (the "Transaction Agreement"), by and among Smurfit Kappa Group plc, Smurfit WestRock plc (formerly Smurfit WestRock Limited and prior to that known as Cepheidway Limited, "Smurfit WestRock"), Sun Merger Sub, LLC ("Merger Sub") and WestRock Company ("WestRock"), on July 5, 2024, Merger Sub merged with and into WestRock (the "Merger"). Pursuant to the Merger, each share of WestRock common stock ("WestRock Common Stock") held by the Reporting Person was converted into the right to receive one ordinary share of Smurfit WestRock, par value $0.001 per share (each a "Smurfit WestRock Share"), plus $5.00 in cash (the "Merger Consideration") at the effective time of the Merger (the "Merger Effective Time"). ( 2 )Pursuant to the Transaction Agreement, at the Merger Effective Time, each restricted stock unit award in respect of shares of WestRock Common Stock held by the Reporting Person became fully vested and entitled to receive the Merger Consideration (subject to any deferred payment or settlement as required by Section 409A of the Code).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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