Investor Presentaiton

FORWARD-LOOKING STATEMENTS CITY OFFICE REIT This presentation contains both historical and forward-looking statements. All statements, other than statements of historical fact are, or may be deemed to be, forward looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. We have used the words "approximately," "anticipate," "assume,” “believe,” “budget," "contemplate," "continue," "could," "estimate," "expect," "future,” “intend," "may," "outlook,” “plan,” “potential," "predict,” “project,” “seek," "should," "target," "will" and similar terms and phrases to identify forward-looking statements in this presentation. All of our forward-looking statements are subject to risks and uncertainties that may cause actual results to differ materially from those that we are expecting. Examples of forward-looking statements include those pertaining to expectations regarding the Company's financial performance, including under metrics such as NOI and FFO, market rental rates, national or local economic growth, including the impact of inflation, estimated replacement costs of the Company's properties, the Company's expectations regarding tenant occupancy, re-leasing periods, the Company's ability to renew expiring leases, tenant compliance with contractual lease obligations, projected capital improvements, expected sources of financing and ability to service existing financing, expectations as to the likelihood and timing of closing of acquisitions, dispositions, or other transactions, the expected operating performance of the Company's current properties, anticipated near- term acquisitions and descriptions relating to these expectations, including, without limitation, the anticipated net operating income yield and cap rates, lower than expected yields, increased interest rates, operating costs and costs of capital, and changes in local, regional, national and international economic conditions, including as a result of the ongoing COVID-19 pandemic. Forward-looking statements presented in this presentation are based on management's beliefs and assumptions made by, and information currently available to, management. The forward-looking statements contained in this presentation are based on historical performance and management's current plans, estimates and expectations in light of information currently available to the Company and are subject to uncertainty and changes in circumstances. There can be no assurance that future developments affecting the Company will be those that the Company has anticipated. Actual results may differ materially from these expectations due to the factors, risks and uncertainties described above, changes in global, regional or local political, economic, business, competitive, market, regulatory and other factors described in the Company's news releases and filings with the U.S. Securities and Exchange Commission (the "SEC"), including but not limited to those described in the Company's Annual Report on Form 10-K for the year ended December 31, 2022 under the heading "Risk Factors" and in the Company's subsequent reports filed with the SEC, many of which are beyond the Company's control. Should one or more of these risks or uncertainties materialize, or should any of the Company's assumptions prove to be incorrect, the Company's actual results may vary in material respects from what the Company may have expressed or implied by these forward-looking statements. CIO cautions that you should not place undue reliance on any of CIO's forward-looking statements. Any forward-looking statement made by the Company in this presentation speaks only as of the date of this presentation. Factors or events that could cause the Company's actual results to differ may emerge from time to time, and it is not possible for the Company or its management to predict all of them. The Company does not guarantee that the assumptions underlying such forward-looking statements contained in this presentation are free from errors. Unless otherwise stated, historical financial information and per share and other data are as of September 30, 2023 or relate to the quarter ended September 30, 2023. The Company has no obligation, and does not undertake, to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by applicable securities laws. 2

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