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 25, 2026

Smurfit Westrock plc

(Exact name of registrant as specified in its charter)

Ireland
(State or other jurisdiction of
incorporation)

001-42161

(Commission
File Number)

98-1776979
(I.R.S. Employer
Identification No.)

Beech Hill, Clonskeagh

Dublin 4, D04 N2R2

Ireland

(Address of principal executive offices, including Zip Code)

+353 1 202 7000

(Registrant’s telephone phone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Ordinary shares, par value $0.001 per share	SW	New York Stock Exchange (NYSE)

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 5.02.      Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On February 25, 2026, Terrell K. Crews and Lourdes Melgar, members of the Board of Directors (the “Board”) of Smurfit Westrock plc (the “Company”), notified the Company that they will be stepping down from the Board, effective as of the conclusion of the Company’s 2026 Annual General Meeting of Shareholders, which is currently scheduled for May 1, 2026, at which time the size of the Board will be decreased to 12 directors. Neither Terrell’s nor Lourdes’s decision to resign was related to any disagreement with the Company relative to their departures or to any matters relating to the Company’s operations, policies, or practices. The Board and the Company thank Terrell and Lourdes for their service and their contributions to the Company during the formative period following the combination of Smurfit Kappa Group plc and WestRock Company.

Consequently, effective as of their board retirement, Terrell will be stepping down as Chair of the Audit Committee and as a member of the Finance Committee, and Lourdes will be stepping down as a member of the Audit and Sustainability Committees. Carole L. Brown will succeed Terrell as Chair of the Audit Committee, effective as of such time. Appropriate succession arrangements will be implemented within the relevant Board Committees.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Smurfit Westrock plc

		/s/ Ken Bowles
	Name:	Ken Bowles
	Title:	Executive Vice President & Group Chief Financial Officer

Date: February 27, 2026

Smurfit Westrock plc 8-K