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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares | Jun. 30, 2025 | Dec. 31, 2024
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Private Perpetual Preferred Units, Series 2019 |  |
Capital: |  |
Private perpetual preferred units, liquidation preference (in USD per share) | $ 13.52 | $ 13.52
Private perpetual preferred units, issued (in shares) | 4,664,038 | 4,664,000
Private perpetual preferred units, outstanding (in shares) | 4,664,000 | 4,664,000
Private Perpetual Preferred Units, Series 2014 |  |
Capital: |  |
Private perpetual preferred units, liquidation preference (in USD per share) | $ 16.62 | $ 16.62
Private perpetual preferred units, issued (in shares) | 1,560,000 | 1,560,000
Private perpetual preferred units, outstanding (in shares) | 1,560,000 | 1,560,000
Series PR Operating Partnership Units |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 85,067,000 | 81,605,000
Series ES Operating Partnership Units Limited Partners |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 17,483,000 | 18,181,000
Series 60 Operating Partnership Units Limited Partners |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 4,460,000 | 4,589,000
Series 250 Operating Partnership Units Limited Partners |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 2,298,000 | 2,393,000
ESRT | Series PR Operating Partnership Units |  |
Capital: |  |
General partner operating partnership units, outstanding (in shares) | 2,786,000 | 2,742,000
Limited partner operating partnership units, outstanding (in shares) | 166,490,000 | 164,641,000

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