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Earnings per Common Share or Unit | 3 Months Ended
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Mar. 31, 2022
Earnings per Common Share or Unit |
Earnings per Common Share or Unit | ​ 9. Earnings per Common Share or Unit The following is a summary of basic and diluted income per share/unit (in thousands, except per share/unit amounts): ​ Digital Realty Trust, Inc. Earnings per Common Share
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2022 |  | 2021
Net income available to common stockholders | ​ | $ | 63,100 | ​ | $ | 372,406
Weighted average shares outstanding—basic | ​ |  | 284,526 | ​ |  | 281,095
Potentially dilutive common shares: | ​ |  |  | ​ |  |
Unvested incentive units | ​ |  | 348 | ​ |  | 324
Unvested restricted stock | ​ | ​ | 91 | ​ | ​ | 158
Market performance-based awards | ​ |  | 60 | ​ |  | 340
Weighted average shares outstanding—diluted | ​ |  | 285,025 | ​ |  | 281,917
Income per share: | ​ |  |  | ​ |  |
Basic | ​ | $ | 0.22 | ​ | $ | 1.32
Diluted | ​ | $ | 0.22 | ​ | $ | 1.32
​ Digital Realty Trust, L.P. Earnings per Unit
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2022 |  | 2021
Net income available to common unitholders | ​ | $ | 64,700 | ​ | $ | 382,206
Weighted average units outstanding—basic | ​ |  | 290,163 | ​ |  | 288,377
Potentially dilutive common units: | ​ |  |  | ​ |  |
Unvested incentive units | ​ |  | 348 | ​ |  | 324
Unvested restricted units | ​ | ​ | 91 | ​ | ​ | 158
Market performance-based awards | ​ |  | 60 | ​ |  | 340
Weighted average units outstanding—diluted | ​ |  | 290,662 | ​ |  | 289,199
Income per unit: | ​ |  |  | ​ |  |
Basic | ​ | $ | 0.22 | ​ | $ | 1.32
Diluted | ​ | $ | 0.22 | ​ | $ | 1.32
​ The below table shows the securities that would be antidilutive or not dilutive to the calculation of earnings per share and unit. Common units of the Operating Partnership not owned by Digital Realty Trust, Inc. were excluded only from the calculation of earnings per share as they are not applicable to the calculation of earnings per unit. All other securities shown below were excluded from the calculation of both earnings per share and earnings per unit (in thousands). ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​
​ |  | 2022 |  | 2021 |
Shares subject to Forward Equity Offering | ​ | 6,250 | ​ | — | ​
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. |  | 7,552 |  | 7,283 |
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock |  | — |  | 1,476 |
Potentially dilutive Series J Cumulative Redeemable Preferred Stock |  | 1,452 |  | 1,462 |
Potentially dilutive Series K Cumulative Redeemable Preferred Stock | ​ | 1,527 | ​ | 1,537 | ​
Potentially dilutive Series L Cumulative Redeemable Preferred Stock | ​ | 2,505 | ​ | 2,521 | ​
Total |  | 19,286 |  | 14,279 |
​

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