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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] | 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, 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 |  |  |  | 5,048 | (5,048) |  |  |
Exercise of EQR share options |  |  |  | 6,480 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | 2,449 |  |  |  |
EQR restricted shares |  |  |  | 9,383 | 2 |  |  |
EQR share options |  |  |  | 2,507 |  |  |  |
EQR ESPP discount |  |  |  | 501 |  |  |  |
OP Units repurchased and retired |  |  |  | (38,474) |  |  |  |
Net income available to Units - General Partner |  | $ 470,924 |  | 470,924 |  |  |  |
OP Units - General Partner distributions |  |  |  | (511,720) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (598) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  | (39,058) |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  | 1,532 | (1,532) |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  | 10,236 |  |  |
Net income available to Units - Limited Partners |  | 13,278 |  |  | 13,278 |  |  |
Units - Limited Partners distributions |  |  |  |  | (15,875) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  | 665 |  |  |
Losses reclassified into earnings from other comprehensive income | $ 1,210 | 1,210 |  |  |  | 1,210 |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  | $ 1.35 |
Net income attributable to Noncontrolling Interests | 488,587 | 488,587 |  |  |  |  |  | 2,039
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  | 458
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (2,786)
Other |  |  |  |  |  |  |  | (1,000)
Balance, end of period at Jun. 30, 2024 |  |  | 17,155 | 10,951,818 | 204,032 | 6,914 |  |
Balance, end of period at Jun. 30, 2024 |  |  |  |  |  |  |  | (295)
Balance, beginning of year at Mar. 31, 2024 |  |  | 17,155 | 11,044,203 | 207,272 | 6,314 |  |
Balance, beginning of year at Mar. 31, 2024 |  |  |  |  |  |  |  | (1,131)
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  | 4,794 | (4,794) |  |  |
Exercise of EQR share options |  |  |  | 2,079 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | 805 |  |  |  |
EQR restricted shares |  |  |  | 4,887 |  |  |  |
EQR share options |  |  |  | 1,218 |  |  |  |
EQR ESPP discount |  |  |  | 205 |  |  |  |
Net income available to Units - General Partner |  | 177,128 |  | 177,128 |  |  |  |
OP Units - General Partner distributions |  |  |  | (255,877) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (371) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  | (30,243) |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  | 2,990 | (2,990) |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  | 6,149 |  |  |
Net income available to Units - Limited Partners |  | 5,003 |  |  | 5,003 |  |  |
Units - Limited Partners distributions |  |  |  |  | (7,429) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  | 821 |  |  |
Losses reclassified into earnings from other comprehensive income | 600 | 600 |  |  |  | 600 |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  | 0.675 |
Net income attributable to Noncontrolling Interests | 183,555 | 183,555 |  |  |  |  |  | 1,069
Contributions by Noncontrolling Interests |  |  |  |  |  |  |  | 223
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (456)
Balance, end of period at Jun. 30, 2024 |  |  | 17,155 | 10,951,818 | 204,032 | 6,914 |  |
Balance, end of period at Jun. 30, 2024 |  |  |  |  |  |  |  | (295)
Balance, beginning of year at Dec. 31, 2024 |  |  | 17,155 | 11,023,191 | 201,942 | 4,214 |  |
Balance, beginning of year at Dec. 31, 2024 |  |  |  |  |  |  |  | (718)
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  | 8,773 | (8,773) |  |  |
Exercise of EQR share options |  |  |  | 5,357 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | 1,413 |  |  |  |
EQR restricted shares |  |  |  | 9,339 | 4 |  |  |
EQR share options |  |  |  | 2,656 |  |  |  |
EQR ESPP discount |  |  |  | 258 |  |  |  |
Net income available to Units - General Partner |  | 448,237 |  | 448,237 |  |  |  |
OP Units - General Partner distributions |  |  |  | (526,428) |  |  |  |
Offering costs |  |  |  | (481) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (740) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  | 19,568 |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  | (1,692) | 1,692 |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  | 10,593 |  |  |
Net income available to Units - Limited Partners |  | 12,328 |  |  | 12,328 |  |  |
Units - Limited Partners distributions |  |  |  |  | (16,159) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  | 1,090 |  |  |
Unrealized holding gains (losses) arising during the period | (3,550) | (3,550) |  |  |  | (3,550) |  |
Losses reclassified into earnings from other comprehensive income | 951 | 951 |  |  |  | 951 |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  | 1.385 |
Net income attributable to Noncontrolling Interests | 463,583 | 463,583 |  |  |  |  |  | 2,307
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (4,052)
Balance, end of period at Jun. 30, 2025 |  |  | 17,155 | 10,989,451 | 202,717 | 1,615 |  |
Balance, end of period at Jun. 30, 2025 |  |  |  |  |  |  |  | (2,463)
Balance, beginning of year at Mar. 31, 2025 |  |  | 17,155 | 11,026,779 | 207,090 | 3,396 |  |
Balance, beginning of year at Mar. 31, 2025 |  |  |  |  |  |  |  | (2,989)
Conversion of OP Units held by Limited Partners into OP Units held by General Partner |  |  |  | 4,366 | (4,366) |  |  |
Exercise of EQR share options |  |  |  | 997 |  |  |  |
EQR's Employee Share Purchase Plan (ESPP) |  |  |  | 471 |  |  |  |
EQR restricted shares |  |  |  | 4,901 |  |  |  |
EQR share options |  |  |  | 1,377 |  |  |  |
EQR ESPP discount |  |  |  | 64 |  |  |  |
Net income available to Units - General Partner |  | 192,001 |  | 192,001 |  |  |  |
OP Units - General Partner distributions |  |  |  | (263,133) |  |  |  |
Offering costs |  |  |  | (481) |  |  |  |
Supplemental Executive Retirement Plan (SERP) |  |  |  | (851) |  |  |  |
Change in market value of Redeemable Limited Partners |  |  |  | 18,813 |  |  |  |
Adjustment for Limited Partners ownership in Operating Partnership |  |  |  | 4,147 | (4,147) |  |  |
Equity compensation associated with Units - Limited Partners |  |  |  |  | 5,492 |  |  |
Net income available to Units - Limited Partners |  | 5,226 |  |  | 5,226 |  |  |
Units - Limited Partners distributions |  |  |  |  | (7,559) |  |  |
Change in carrying value of Redeemable Limited Partners |  |  |  |  | 981 |  |  |
Unrealized holding gains (losses) arising during the period | (2,046) | (2,046) |  |  |  | (2,046) |  |
Losses reclassified into earnings from other comprehensive income | 265 | 265 |  |  |  | 265 |  |
Distributions declared per Unit outstanding |  |  |  |  |  |  | $ 0.6925 |
Net income attributable to Noncontrolling Interests | $ 198,785 | $ 198,785 |  |  |  |  |  | 1,203
Distributions to Noncontrolling Interests |  |  |  |  |  |  |  | (677)
Balance, end of period at Jun. 30, 2025 |  |  | $ 17,155 | $ 10,989,451 | $ 202,717 | $ 1,615 |  |
Balance, end of period at Jun. 30, 2025 |  |  |  |  |  |  |  | $ (2,463)

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