Form 8-K

8-K — Smurfit Westrock plc

Accession: 0001104659-26-053535

Filed: 2026-05-01

Period: 2026-05-01

CIK: 0002005951

SIC: 2650 (PAPERBOARD CONTAINERS & BOXES)

Item: Submission of Matters to a Vote of Security Holders

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0002005951

2026-05-01

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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, 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 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

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 ¨

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 5.07 Submission of Matters to a Vote of Security Holders

On May 1, 2026, Smurfit Westrock plc (the “Company”) held

its 2026 annual general meeting of shareholders (the “Annual General Meeting”). The Company’s shareholders voted to

approve the election of each director nominee named in proposal 1 and approved each of proposals 2 through 6 considered at the Annual

General Meeting. The following chart sets forth the number and percentage of votes cast for and against, and the number of abstention

votes and broker non-votes, with respect to each proposal voted upon by the Company’s shareholders (proposal numbers correspond

to the proposal numbers used in the Company’s definitive proxy statement for the Annual General Meeting, filed with the Securities

and Exchange Commission on March 11, 2026):

Proposals

For

Against

Abstain

Broker

Non-Votes

Elect the following director nominees to the Board of Directors:

Irial Finan

427,761,616

98.21 %

7,789,671

1.79 %

97,721

16,398,374

Anthony Smurfit

434,333,554

99.73 %

1,185,306

0.27 %

130,148

16,398,374

Ken Bowles

431,467,484

99.09 %

3,946,980

0.91 %

234,544

16,398,374

Colleen F. Arnold

433,831,919

99.60 %

1,752,496

0.40 %

64,593

16,398,374

Timothy J. Bernlohr

427,730,195

98.20 %

7,843,217

1.80 %

75,596

16,398,374

Carole L. Brown

433,740,424

99.59 %

1,768,511

0.41 %

140,073

16,398,374

Carol Fairweather

434,258,698

99.71 %

1,254,420

0.29 %

135,890

16,398,374

Mary Lynn Ferguson-McHugh

434,251,836

99.69 %

1,332,279

0.31 %

64,893

16,398,374

Suzan F. Harrison

428,352,067

98.34 %

7,233,446

1.66 %

63,495

16,398,374

Kaisa Hietala

425,071,389

97.59 %

10,481,164

2.41 %

96,455

16,398,374

Jørgen Buhl Rasmussen

434,246,527

99.69 %

1,329,140

0.31 %

73,341

16,398,374

Alan D. Wilson

428,095,475

98.28 %

7,478,491

1.72 %

75,042

16,398,374

Approve, in a non-binding, advisory vote, the compensation of the Company’s named executive officers.

408,393,920

93.82 %

26,895,776

6.18 %

359,312

16,398,374

3(a).

Ratify, in a non-binding vote, the appointment of KPMG as the Company’s independent registered public accounting firm and statutory auditor under Irish law for the fiscal year ended December 31, 2026.

448,552,475

99.27 %

3,295,434

0.73 %

199,473

—

3(b).

Authorize, in a binding vote, the Audit Committee of the Board of Directors to determine the remuneration of KPMG as the Company’s statutory auditor under Irish law.

446,132,046

98.74 %

5,700,405

1.26 %

214,931

—

Renewal of the Board of Directors’ existing authority to issue shares under Irish law.

438,480,037

97.05 %

13,320,909

2.95 %

246,436

—

Renewal of the Board of Directors’ existing authority to opt-out of statutory pre-emption rights under Irish law.

378,484,326

83.80 %

73,156,467

16.20 %

406,589

—

Determine the price range at which the Company can re-issue shares that it holds as treasury shares under Irish law.

449,469,274

99.62 %

1,711,491

0.38 %

866,617

—

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: May 1, 2026

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