Company: CIO
Filing Date: 2025-08-15
Form Type: DEFA14A
Source: 0001193125-25-181889
Chunk: 6

Company: City Office REIT, Inc.
Filing Date: 2025-08-15
Form: DEFA14A
Chunk 6
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|                       |     |     |     | Name: Anthony Maretic                                     
 Title:   Chief Financial Officer, Secretary and Treasurer |

Exhibit 10.1

THIRD AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT

• THIS THIRD AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), made as
of July 21, 2025, is between and among CITY OFFICE REIT OPERATING PARTNERSHIP, L.P., a Maryland limited partnership (“Borrower”), CITY OFFICE REIT, INC., a Maryland corporation (“REIT Guarantor”), the
Subsidiary Guarantors (collectively, the “Subsidiary Guarantors”), KEYBANK NATIONAL ASSOCIATION (“KeyBank”), as Administrative Agent (“Agent”) and Swing Loan Lender, and a Lender under the Credit
Agreement (defined below), and certain other Lenders.

R E C I T A L S

• WHEREAS, Borrower, REIT Guarantor, the Subsidiary Guarantors, the Agent, KEYBANC CAPITAL MARKETS as
Sole Lead Arranger and Sole Book Manager, and the Lenders have entered into that certain Amended and Restated Credit Agreement dated as of November 16, 2021, as amended on August 10, 2022 pursuant to that certain First Amendment to Amended
and Restated Credit Agreement, and on January 5, 2023 pursuant to that certain Second Amendment to Amended and Restated Credit Agreement (as so amended and as may be further amended, restated, supplemented, or otherwise modified, the
“Credit Agreement”; capitalized terms not otherwise defined herein shall have the meaning ascribed to them in the Credit Agreement attached hereto as Annex A);

• WHEREAS, the Credit Parties, the Agent, and the Lenders have agreed to amend the Credit Agreement
as provided herein;

• NOW, THEREFORE, in consideration of the recitals herein and mutual
covenants and agreements contained herein, the parties hereto hereby agree as follows:

§1. .
Subject to satisfaction of the conditions set forth in Section 3, the Credit Agreement shall be modified as follows:

(a) the Credit Agreement (but not the Exhibits and Schedules attached thereto) is hereby amended (i) to
delete the stricken