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EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL - Earnings Per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Basic and diluted earnings per common share |  |  |
Net income | $ 331,317 | $ 391,885 | $ 412,435
Net income attributable to noncontrolling interests in the Operating Partnership | (1,625) | (2,159) | (2,535)
Net loss attributable to noncontrolling interests in subsidiaries | 4,090 | 1,454 | 857
NET INCOME ATTRIBUTABLE TO THE COMPANY | $ 333,782 | $ 391,180 | $ 410,757
Weighted average basic shares outstanding (in shares) | 228,727,000 | 226,353,000 | 225,424,000
Share options and restricted share units (in shares) | 433,000 | 797,000 | 817,000
Weighted average diluted shares outstanding (in shares) | 229,160,000 | 227,150,000 | 226,241,000
Basic earnings per share attributable to common shareholders (in dollars per share) | $ 1.46 | $ 1.73 | $ 1.82
Diluted earnings per share attributable to common shareholders (in dollars per share) | 1.46 | 1.72 | 1.82
Dividends declared per common share (in dollars per share) | $ 2.09 | $ 2.05 | $ 1.98
Basic and diluted earnings per common unit |  |  |
Weighted average basic units outstanding (in shares) | 228,727,000 | 226,353,000 | 225,424,000
Share options and restricted share units (in shares) | 433,000 | 797,000 | 817,000
Weighted average diluted shares outstanding (in shares) | 229,160,000 | 227,150,000 | 226,241,000
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 1.46 | $ 1.72 | $ 1.82
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 1,400,000 | 700,000 | 700,000
Dividends declared per common share (in dollars per share) | $ 2.09 | $ 2.05 | $ 1.98
OP Units |  |  |
Basic and diluted earnings per common unit |  |  |
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 1,100,000 | 1,300,000 | 1,400,000
CubeSmart, L.P. and Subsidiaries |  |  |
Basic and diluted earnings per common share |  |  |
Net income | $ 331,317 | $ 391,885 | $ 412,435
Weighted average basic shares outstanding (in shares) | 229,844,000 | 227,603,000 | 226,817,000
Share options and restricted share units (in shares) | 433,000 | 797,000 | 817,000
Weighted average diluted shares outstanding (in shares) | 230,277,000 | 228,400,000 | 227,634,000
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 1.46 | $ 1.72 | $ 1.82
Basic and diluted earnings per common unit |  |  |
Net Income | $ 331,317 | $ 391,885 | $ 412,435
Net loss attributable to noncontrolling interests in subsidiaries | 4,090 | 1,454 | 857
Net income attributable to CubeSmart L.P. | $ 335,407 | $ 393,339 | $ 413,292
Weighted average basic units outstanding (in shares) | 229,844,000 | 227,603,000 | 226,817,000
Share options and restricted share units (in shares) | 433,000 | 797,000 | 817,000
Weighted average diluted shares outstanding (in shares) | 230,277,000 | 228,400,000 | 227,634,000
Basic earnings per unit attributable to common unitholders (in dollars per share) | $ 1.46 | $ 1.73 | $ 1.82
Diluted earnings per share attributable to common shareholders (in dollars per share) | 1.46 | 1.72 | 1.82
Dividends declared per common unit (in dollars per unit) | $ 2.09 | $ 2.05 | $ 1.98
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 1,400,000 | 700,000 | 700,000
Outstanding units of noncontrolling interest in the Operating Partnership (in shares) | 1,003,240 | 1,194,705 |

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