First Supplemental Indenture, dated December 23, 2021, by and among Williams Scotsman, Inc., the guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee and collateral agent

Exhibit 4.2

Execution Version

WILLIAMS SCOTSMAN, INC.

as Issuer

and

THE GUARANTORS PARTY HERETO

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4.625% SENIOR SECURED NOTES DUE 2028

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SUPPLEMENTAL INDENTURE

DATED AS OF DECEMBER 23, 2021

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DEUTSCHE BANK TRUST COMPANY AMERICAS

as Trustee and Collateral Agent

This SUPPLEMENTAL INDENTURE, dated as of December 23, 2021, is by Williams Scotsman, Inc., a Maryland corporation (the “Company”), each of the parties identified under the caption “Guarantors” on the signature page hereto (the “Guarantors”), Deutsche Bank Trust Company Americas, as trustee (in such capacity and not in its individual capacity, the “Trustee”), and Deutsche Bank Trust Company Americas, as collateral agent (in such capacity and not in its individual capacity, the “Collateral Agent”).

RECITALS

WHEREAS, Williams Scotsman International, Inc., a Delaware corporation (the “WSII”), the guarantors party thereto, the Trustee and the Collateral Agent entered into an Indenture, dated as of August 25, 2020 (as amended or supplemented from time to time, the “Indenture”), pursuant to which WSII initially issued $500,000,000 in principal amount of 4.625% Senior Secured Notes due 2028 (the “Notes”);

WHEREAS, on the date hereof, WSII is merging with and into the Company, the Company being the surviving Person of such merger and WSII ceasing to exist (the “Merger”);

WHEREAS, Section 5.1 of the Indenture permits, among other things, a consolidation or amalgamation of WSII with, or a merger of WSII with or into, any other Person; provided that such Surviving Entity shall expressly assume by supplemental indenture all of the Obligations of WSII under the Indenture and each guarantor, unless it is the Surviving Entity, shall by supplemental indenture confirm that its Note Guarantee shall apply to the Successor Entity’s obligations under the Indenture and the Notes;

WHEREAS, Section 9.1(2) of the Indenture provides that WSII, the Guarantors, the Trustee and the Collateral Agent, as applicable, may supplement the Indenture in order to evidence the succession of another Person and the assumption by any such successor of the covenants and other obligations under the Indenture, without the consent of the Holders; and

WHEREAS, all acts and procedures prescribed by the Indenture to make this Supplemental Indenture a legally valid and binding instrument on the Company, the Guarantors, the Trustee and the Collateral Agent, in accordance with its terms, have been duly done and performed.

NOW, THEREFORE, in compliance with the provisions of the Indenture and in consideration of the above premises, the Company, the Guarantors, the Trustee and the Collateral Agent covenant and agree for the equal and proportionate benefit of the respective Holders of the Notes as follows:

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IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, all as of the date first written above.

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