Fifth Supplemental Indenture, dated as of September 26, 2023, to the Indenture dated as of August 24, 2017, between WRKCo and The Bank of New York Mellon, as trustee

Exhibit 4.1(f)

WRKCO INC.,

as Issuer

___________________________________

FIFTH SUPPLEMENTAL INDENTURE

Dated as of September 26, 2023

to

INDENTURE

Dated as of August 24, 2017

___________________________________

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.

as Trustee

3.750% Senior Notes due 2025

3.375% Senior Notes due 2027

4.000% Senior Notes due 2028

FIFTH SUPPLEMENTAL INDENTURE dated as of September 26, 2023 (this “Supplemental Indenture”), by and among WRKCo Inc., a Delaware corporation (the “Issuer”), and The Bank of New York Mellon Trust Company, N.A., a national banking association organized under the laws of the United States of America, as trustee (the “Trustee”).

RECITALS:

WHEREAS, the Issuer previously executed and delivered an indenture, dated as of August 24, 2017, among the Issuer, the guarantors party thereto and the Trustee (the “Base Indenture”, as amended and supplemented by the first supplemental indenture, dated as of August 24, 2017 (the “First Supplemental Indenture”), as further amended and supplemented by the second supplemental indenture, dated as of March 6, 2018 (the “Second Supplemental Indenture”), as further amended and supplemented by the third supplemental indenture, dated as of November 2, 2018 (the “Third Supplemental Indenture”), as further amended and supplemented by the fourth supplemental indenture, dated as of September 22, 2023 (the “Fourth Supplemental Indenture”), and, as further amended and supplemented by this Supplemental Indenture with respect to the Notes (as defined below), the “Indenture”) to provide for the issuance from time to time of the Issuer’s unsecured debentures, notes or other evidences of indebtedness, to be issued in one or more series and guaranteed by the Guarantors (as defined in the Indenture) on the terms set forth therein;

WHEREAS, pursuant to the First Supplemental Indenture, the Issuer issued U.S. $500,000,000 aggregate principal amount of its 3.375% Senior Notes due 2027 (the “2027 Notes”), and pursuant to the Second Supplemental Indenture, the Issuer issued U.S. $600,000,000 aggregate principal amount of its 3.750% Senior Notes due 2025 (the “2025 Notes”) and U.S. $600,000,000 aggregate principal amount of its 4.000% Senior Notes due 2028 (the “2028 Notes”, and together with the 2025 Notes and the 2027 Notes, the “Notes”);

WHEREAS, the parties hereto have agreed to make certain modifications to the First Supplemental Indenture and the Second Supplemental Indenture with respect to the Notes subject to the terms and conditions set forth herein;

WHEREAS, Section 9.2 (With Consent of Holders of Securities) of the Base Indenture provides that the Issuer and the Trustee may, with the consent of the Holders of at least a majority in principal amount of the then outstanding Notes of each series, amend the Indenture subject to certain limitations set forth in the Indenture;

WHEREAS, the Issuer solicited consents from Holders of the Notes pursuant to the consent solicitation statement dated September 20, 2023 (the “Consent Solicitation Statement”) to certain proposed amendments to the First Supplemental Indenture and the Second Supplemental Indenture as contained herein upon the terms and subject to the conditions set forth therein, which consents were received: (i) for the 2025 Notes on September 26, 2023, (ii) for the 2027 Notes on September 26, 2023 and (iii) for the 2028 Notes on September 26, 2023;

WHEREAS, the Issuer has requested that the Trustee execute and deliver this Supplemental Indenture and for this purpose has delivered to the Trustee evidence that the Required Consents (as defined in the Consent Solicitation Statement) with respect to each series

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of Notes to effect the amendments contained herein have been duly and validly received by the Issuer;

WHEREAS, this Supplemental Indenture shall become effective and operative upon the date hereof (the “Effective Time”);

WHEREAS, Section 2.14 (Acts of Holders; Record Date) and Section 9.4 (Revocation and Effect of Consents) of the Base Indenture provide that, when a supplemental indenture becomes effective in accordance with its terms, it thereafter binds every Holder, including any future Holder of the relevant series of the Notes;

WHEREAS, this Supplemental Indenture is being entered into pursuant to Section 9.2 (With Consent of Holders of Securities) and Section 9.6 (Trustee to Sign Amendments, Etc.) of the Base Indenture;

AND WHEREAS, all acts and things necessary to make this Supplemental Indenture a valid agreement according to its terms have been done and performed, and the execution of this Supplemental Indenture and the amendments to the First Supplemental Indenture and the Second Supplemental Indenture as provided herein has been duly authorized in all respects;

NOW THEREFORE, in consideration of the premises, and for the purpose of setting forth the amendments to the First Supplemental Indenture and the Second Supplemental Indenture as provided herein, the Issuer covenants and agrees with the Trustee, as follows:

(iv) ““Change of Control” means the occurrence of any one of the following:

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(1) the direct or indirect sale, lease, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or substantially all of the assets of Parent and its Subsidiaries taken as a whole to any "person" (as that term is used in Section 13(d)(3) of the Exchange Act) other than to Parent or one of its Subsidiaries;

(2) the consummation of any transaction (including without limitation, any merger or consolidation) the result of which is that any "person" (as that term is used in Section 13(d)(3) of the Exchange Act) becomes the ultimate "beneficial owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, of more than 50% of the outstanding Voting Stock of Parent, measured by voting power rather than number of shares;

(3) Parent consolidates with, or merges with or into, any Person, or any Person consolidates with, or merges with or into, Parent, in any such event pursuant to a transaction in which any of the outstanding Voting Stock of Parent or such other Person is converted into or exchanged for cash, securities or other property, other than any such transaction where the shares of the Voting Stock of Parent outstanding immediately prior to such transaction constitute, or are converted into or exchanged for, a majority of the Voting Stock of the surviving Person or any direct or indirect parent company of the surviving Person immediately after giving effect to such transaction;

(4) the first day on which the majority of the members of the Board of Directors of Parent cease to be Continuing Directors; or

(5) the adoption of a plan relating to the liquidation or dissolution of Parent.

Notwithstanding the foregoing, the consummation of the Merger Transaction shall not constitute a Change of Control.

For the purposes of this definition: (i) “Merger Transaction” shall mean the merger of WestRock Company into a wholly-owned subsidiary of Smurfit WestRock, a private limited liability company organized under the laws of Ireland, through a series of intermediate steps and transactions, with WestRock Company as the surviving corporation, in accordance with the terms of the Transaction Agreement, and any other steps or transactions contemplated by the Transaction Agreement, and (ii) “Transaction Agreement” shall mean the transaction agreement dated September 12, 2023, by and among, inter alios, Smurfit Kappa Group plc, a public limited company incorporated in Ireland, and WestRock Company, as amended, supplemented or modified from time to time.”

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(Signature pages follow)

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the day and year first above written.

WRKCO INC.,

as Issuer

By: /s/ M. Benjamin Haislip

Name: M. Benjamin Haislip
Title: Senior Vice President and Treasurer

[Signature Page to 2017 Supplemental Indenture]

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,

as Trustee

By: /s/ Terence Rawlins

Name: Terence Rawlins
Title: Vice President

[Signature Page to 2017 Supplemental Indenture]