Investor Presentaiton

4 External Growth: Investment Activity 2023 $15 $18 Total Investment Activity Through November 30, 2023 2022 $54 $19 $19 $325 $98 2021 $28 $20 $38 $76 $162 million 2020 $13 2019 $35 2018 2017 $71 2016 $105 $93 $37 $143 million $172 $358 million (1) $172 $362 million (1) $207 million $85 $14 $204 million $41 $112 million $551 $44 $595 million(1) SmartStop Self Storage REIT, Inc. ...The Smarter Way to Store! SmartStop Through November 30, 2023 Acquired 66 properties for $857 million since 2016 SmartStop acquired three properties during Q2 2022 Stabilized Acquisitions C of O and Lease-up Acquisitions Acquired 37 properties at Certificate of Occupancy or in early lease-up for $489 million since 2016(2) Ground-up Development • Delivered 10 development properties since 2016 Majority of ground-up development properties are located in Canada Managed REITs Through November 30, 2023 Acquired five properties for $98 million since 2021 Stabilized Acquisitions C of O and Lease-up Acquisitions • Acquired 26 properties at Certificate of Occupancy or in early lease-up for $573 million since 2021 Note: All acquisition and development prices for SmartStop reflect the original purchase price executed by SmartStop, including Strategic Storage Growth Trust, Inc., Strategic Storage Trust IV, Inc., and Strategic Storage Growth Trust II, Inc.; Original purchase price (converted, as applicable, into USD) executed by (1) Acquisitions collapsed for illustrative purposes. (2) Includes one property that the Company acquired in development that received a certificate of occupancy in October 2023. Investor Presentation | 20

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