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Stockholders' equity (Notes)
 12 Months Ended
Dec. 31, 2023
Stockholders' Equity Note [Abstract]  
Stockholders' equity
Common equity transactions    

During the three months ended December 31, 2023, we settled our forward equity sales agreements that were outstanding as of December 31, 2022, by issuing 699 thousand shares of common stock, for which we received net proceeds of $104.3 million.
Accumulated other comprehensive loss

The change in accumulated other comprehensive loss attributable to Alexandria Real Estate Equities, Inc.’s stockholders during the year ended December 31, 2023 was entirely due to net unrealized gains of $4.9 million on foreign currency translation related to our operations primarily in Canada.
Common stock, preferred stock, and excess stock authorizations

Our charter authorizes the issuance of 400.0 million shares of common stock, of which 171.9 million shares were issued and outstanding as of December 31, 2023. Our charter also authorizes the issuance of up to 100.0 million shares of preferred stock, none of which were issued and outstanding as of December 31, 2023. In addition, 200.0 million shares of “excess stock” (as defined in our charter) are authorized, none of which were issued and outstanding as of December 31, 2023.