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CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands | Total | ERPOP [Member] | Preferred Stock [Member] ERPOP [Member] | Preferred Stock [Member] ERPOP [Member] 8.29% Series K Cumulative Redeemable Preferred Stock | GENERAL PARTNER [Member] ERPOP [Member] | LIMITED PARTNERS [Member] ERPOP [Member] | ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member] ERPOP [Member] | DISTRIBUTIONS [Member] ERPOP [Member] | PARTIALLY OWNED PROPERTIES [Member] ERPOP [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2022 |  |  | $ 37,280 |  | $ 11,138,706 | $ 209,961 | $ (2,547) |  |
Balance, beginning of year at Dec. 31, 2022 |  |  |  |  |  |  |  |  | $ (721)
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  | 3,673 | (3,673) |  |  |
Exercise of EQR share options |  |  |  |  | 8,112 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  |  | 1,452 |  |  |  |
EQR restricted shares |  |  |  |  | 3,654 |  |  |  |
EQR share options |  |  |  |  | 1,497 |  |  |  |
EQR ESPP discount |  |  |  |  | 260 |  |  |  |
Net income available to Units - General Partner |  | $ 211,263 |  |  | 211,263 |  |  |  |
OP Units - General Partner distributions |  |  |  |  | (250,969) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | 491 |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  |  | (5,946) |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | (953) | 953 |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  |  | 4,654 |  |  |
Net income available to Units - Limited Partners |  | 7,059 |  |  |  | 7,059 |  |  |
Units - Limited Partners distributions |  |  |  |  |  | (7,904) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  | 668 |  |  |
Unrealized holding gains (losses) arising during the period | $ (9,780) | (9,780) |  |  |  |  | (9,780) |  |
Losses reclassified into earnings from other comprehensive income | 1,095 | 1,095 |  |  |  |  | 1,095 |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  |  | $ 0.6625 |
Net income attributable to Noncontrolling Interests | 220,071 | 220,071 |  |  |  |  |  |  | 977
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  | (2,809)
Balance, end of period at Mar. 31, 2023 |  |  | 37,280 |  | 11,111,240 | 211,718 | (11,232) |  |
Balance, end of period at Mar. 31, 2023 |  |  |  |  |  |  |  |  | (2,553)
Balance, beginning of year at Dec. 31, 2023 |  |  | 37,280 |  | 11,042,844 | 202,306 | 5,704 |  |
Balance, beginning of year at Dec. 31, 2023 |  |  |  |  |  |  |  |  | 994
Partial redemption |  |  |  | $ (20,125) |  |  |  |  |
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  |  | 254 | (254) |  |  |
Exercise of EQR share options |  |  |  |  | 4,401 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  |  | 1,644 |  |  |  |
EQR restricted shares |  |  |  |  | 4,496 | 2 |  |  |
EQR share options |  |  |  |  | 1,289 |  |  |  |
EQR ESPP discount |  |  |  |  | 296 |  |  |  |
OP Units repurchased and retired | 38,500 |  |  |  | (38,474) |  |  |  |
Net income available to Units - General Partner |  | 293,796 |  |  | 293,796 |  |  |  |
OP Units - General Partner distributions |  |  |  |  | (255,843) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  |  | (227) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  |  | (8,815) |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  |  | (1,458) | 1,458 |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  |  | 4,087 |  |  |
Net income available to Units - Limited Partners |  | 8,275 |  |  |  | 8,275 |  |  |
Units - Limited Partners distributions |  |  |  |  |  | (8,446) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  |  | (156) |  |  |
Losses reclassified into earnings from other comprehensive income | 610 | 610 |  |  |  |  | 610 |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  |  | $ 0.675 |
Net income attributable to Noncontrolling Interests | $ 305,032 | $ 305,032 |  |  |  |  |  |  | 970
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  |  | 235
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  |  | (2,330)
Other |  |  |  |  |  |  |  |  | (1,000)
Balance, end of period at Mar. 31, 2024 |  |  | $ 17,155 |  | $ 11,044,203 | $ 207,272 | $ 6,314 |  |
Balance, end of period at Mar. 31, 2024 |  |  |  |  |  |  |  |  | $ (1,131)

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