City Office REIT updates board roles following chairman’s death

Rhea-AI Filing Summary

City Office REIT, Inc. reported that its Chairman of the Board, John Sweet, passed away on November 23, 2025. To address this leadership change, existing director Sabah Mirza has been appointed as Chairwoman of the Board of Directors. The company also appointed current director Michael Mazan to the Compensation Committee of the Board, filling the vacancy created by Mr. Sweet’s death. These moves keep board leadership and key committee responsibilities in the hands of current directors, aiming to maintain continuity in oversight and governance.

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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): November 23, 2025

City Office REIT, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Maryland		001-36409		98-1141883
(State or other jurisdiction of incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

666 Burrard Street, Suite 3210,
Vancouver, British Columbia		V6C 2X8
(Address of principal executive offices)		(Zip Code)

(604) 806-3366

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

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 Symbols		Name of each exchange on which registered
Common Stock, par value $0.01 per share		CIO		New York Stock Exchange
6.625% Series A Cumulative Redeemable Preferred Stock, par value $0.01 per share		CIO.PrA		New York Stock Exchange

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 November 23, 2025, John Sweet, Chairman of the Board of Directors of City Office REIT, Inc., passed away. In light of Mr. Sweet’s passing, Sabah Mirza, who currently serves as a member of our Board of Directors, has been appointed to serve as Chairwoman of the Board of Directors. In addition, Michael Mazan, who currently serves as a member of the Board, has been appointed to become a member the Compensation Committee of our Board of Directors, thus filling the vacancy on the Committee created by Mr. Sweet’s passing.

SIGNATURES

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

				CITY OFFICE REIT, INC.
Date: November 25, 2025				By:		/s/ Anthony Maretic
				Name:		Anthony Maretic

FAQ

What leadership change did City Office REIT (CIO) announce in this 8-K?

City Office REIT disclosed that its Chairman of the Board, John Sweet, passed away and that existing director Sabah Mirza has been appointed as Chairwoman of the Board.

Who is the new Chairwoman of the Board at City Office REIT (CIO)?

Sabah Mirza, who was already serving as a member of the Board of Directors, has been appointed to serve as Chairwoman of the Board.

When did City Office REIT (CIO) report the death of Chairman John Sweet?

The company reported that John Sweet passed away on November 23, 2025, which is the earliest event date referenced in the report.

What change was made to the Compensation Committee at City Office REIT (CIO)?

Michael Mazan, a current member of the Board, was appointed to the Compensation Committee, filling the vacancy created by the passing of Chairman John Sweet.

Does this City Office REIT (CIO) filing involve any major transactions or earnings data?

No, this report focuses on board and committee changes following the death of the Chairman and does not describe major transactions or earnings results.

What type of SEC filing did City Office REIT (CIO) use to report these board changes?

City Office REIT reported the leadership changes on a Form 8-K under the item covering departures and appointments of directors and certain officers.