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Consolidated Statements Of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Net Income | $ 383,995 | $ 84,188 | $ 291,424
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 912,088 | 887,191 | 830,813
Impairment loss | 85,803 | 13,615 | 0
Amortization of right of use assets - operating leases | 264 | 2,262 | 1,940
Amortization of sales type lease | (989) | (992) | 0
Non-cash compensation expense | 44,334 | 43,949 | 51,478
Loss from unconsolidated joint ventures | 103,560 | 343,177 | 239,543
Distributions of net cash flow from operations of unconsolidated joint ventures | 58,424 | 33,861 | 24,637
Gains from investments in securities | (5,481) | (4,416) | (5,556)
Allowance for current expected credit losses | (1,133) | 78 | 373
Non-cash portion of interest expense | 32,247 | 37,143 | 30,523
Loss from early extinguishment of debt | 338 | 0 | 0
Gains on sales of real estate | (176,732) | (602) | (517)
Loss on sales-type lease | 2,490 | 0 | 0
Unrealized (gain) loss on non-real estate investments | 346 | (546) | (239)
Change in assets and liabilities: |  |  |
Tenant and other receivables, net | 32,507 | 13,716 | (31,470)
Accrued rental income, net | (101,878) | (97,609) | (99,539)
Prepaid expenses and other assets | (4,148) | (5,384) | (7,336)
Right of use assets - operating lease | 0 | (750) | (25,640)
Lease liabilities - operating leases | (3,545) | (202) | (121)
Accounts payable and accrued expenses | 27,161 | (2,395) | 41,696
Accrued interest payable | (2,743) | (5,647) | 29,910
Other liabilities | (19,133) | 12,826 | 7,267
Tenant leasing costs | (122,618) | (118,962) | (77,666)
Total adjustments | 861,162 | 1,150,313 | 1,010,096
Net cash provided by operating activities | 1,245,157 | 1,234,501 | 1,301,520
Cash flows from investing activities: |  |  |
Acquisitions of real estate | (55,864) | (35,366) | 0
Construction in progress | (683,750) | (651,346) | (525,963)
Building, pre-development and other capital improvements | (216,687) | (189,667) | (171,424)
Tenant improvements | (338,808) | (258,312) | (310,925)
Proceeds from sales of real estate | 682,514 | 602 | 517
Acquisition of real estate upon consolidation of unconsolidated joint ventures (net of cash) | 0 | 6,086 | (13,155)
Capital contributions to unconsolidated joint ventures | (258,752) | (132,096) | (192,650)
Capital distributions from unconsolidated joint ventures | 172,662 | 28,325 | 32,787
Investment in non-real estate investments | (3,538) | (2,500) | (2,187)
Issuance of note receivables (including related party) | (22,861) | (3,258) | (12,177)
Proceeds from note receivables (including related party) | 80,000 | 0 | 0
Investments in securities, net | 558 | 136 | 1,496
Net cash used in investing activities | (644,526) | (1,237,396) | (1,193,681)
Cash flows from financing activities: |  |  |
Proceeds from mortgage notes payable | 0 | 0 | 600,000
Repayments of mortgage notes payable | (4,251) | (4,780) | 0
Proceeds from unsecured senior notes | 0 | 849,671 | 747,727
Redemption of unsecured senior notes | (850,000) | (700,000) | (500,000)
Proceeds from Convertible Debt | 1,000,000 | 0 | 0
Borrowings on unsecured line of credit | 865,000 | 0 | 0
Repayments of unsecured line of credit | (865,000) | 0 | 0
Borrowings on unsecured term loans | 700,000 | 0 | 1,200,000
Repayment of unsecured term loan | (700,000) | (500,000) | (730,000)
Finance Lease, Principal Payments | (13,662) | (12,547) | 0
Proceeds from Issuance of Commercial Paper | 8,656,025 | 5,363,333 | 0
Repayments of Commercial Paper | (8,406,025) | (4,863,333) | 0
Deferred financing costs | (39,641) | (12,235) | (19,416)
Capped call transactions premium | (35,000) | 0 | 0
Net activity from equity transactions | (435) | (1,731) | 367
Dividends and distributions | (643,107) | (689,870) | (687,809)
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships | 84,268 | 374,720 | 227,022
Distributions to noncontrolling interests in property partnerships | (83,129) | (77,704) | (69,975)
Acquisition of noncontrolling interests in property partnerships | (43,604) | 0 | 0
Net cash provided by (used in) financing activities | (378,561) | (274,476) | 767,916
Net increase (decrease) in cash and cash equivalents and cash held in escrows | 222,070 | (277,371) | 875,755
Cash and cash equivalents and cash held in escrows, beginning of period | 1,335,196 | 1,612,567 | 736,812
Cash and cash equivalents and cash held in escrows, end of period | 1,557,266 | 1,335,196 | 1,612,567
Reconciliation of cash and cash equivalents and cash held in escrow |  |  |
Cash and cash equivalents, beginning of period | 1,254,882 | 1,531,477 | 690,333
Cash held in escrows, beginning of period | 80,314 | 81,090 | 46,479
Cash and cash equivalents, end of period | 1,478,206 | 1,254,882 | 1,531,477
Cash held in escrows,end of period | 79,060 | 80,314 | 81,090
Supplemental disclosures: |  |  |
Cash paid for interest (net of amounts capitalized) | 677,156 | 676,067 | 553,989
Interest capitalized | 50,626 | 41,976 | 42,633
Non-cash investing and financing activities: |  |  |
Write-off of fully depreciated real estate | (155,440) | (112,074) | (135,093)
Change in real estate included in accounts payable and accrued expenses | 11,910 | (50,891) | 3,668
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 0 | 30,631 | 141,179
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 0 | 0 | 163,056
Finance Lease, Liability, Reversal from Re-Assessment | 0 | (38,491) | 0
Finance Lease, Right-of-Use Asset, Reversal from Re-Assessment | 0 | (28,962) | 0
Non-cash contributions from noncontrolling interests in property partnerships, net | (2,557) | 92,631 | 17,519
Capitalized operating lease costs | 8,732 | 30,195 | 12,580
Construction in progress from prepaid expenses and other assets | 0 | 0 | 25,577
Investment in unconsolidated joint ventures eliminated upon consolidation | 0 | (11,834) | 183,817
Mortgage notes payable recorded upon consolidation | 0 | 207,093 | 300,000
Mortgage note payable converted to unsecured term loan | 0 | 100,000 | 0
Real estate and intangibles recorded upon consolidation | 0 | (220,015) | (490,720)
Interest rate swaps recorded upon consolidation | 0 | 0 | (7,337)
Real estate contributed in exchange for investment in unconsolidated joint venture | (5,595) | 0 | 0
Investment in unconsolidated joint ventures funded by real estate contributed | 5,595 | 0 | 0
Dividends and distributions declared but not paid | 123,753 | 172,486 | 171,176
Conversions of noncontrolling interests to stockholders’ equity | 9,113 | 40,564 | 3,794
Issuance of restricted securities to employees and non-employee directors | 75,641 | 43,360 | 48,141
Boston Properties Limited Partnership |  |  |
Net Income | 396,285 | 90,996 | 298,432
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 905,301 | 880,383 | 823,805
Impairment loss | 82,890 | 13,615 | 0
Amortization of right of use assets - operating leases | 264 | 2,262 | 1,940
Amortization of sales type lease | (989) | (992) | 0
Non-cash compensation expense | 44,334 | 43,949 | 51,478
Loss from unconsolidated joint ventures | 103,560 | 343,177 | 239,543
Distributions of net cash flow from operations of unconsolidated joint ventures | 58,424 | 33,861 | 24,637
Gains from investments in securities | (5,481) | (4,416) | (5,556)
Allowance for current expected credit losses | (1,133) | 78 | 373
Non-cash portion of interest expense | 32,247 | 37,143 | 30,523
Loss from early extinguishment of debt | 338 | 0 | 0
Gains on sales of real estate | (179,322) | (602) | (517)
Loss on sales-type lease | 2,490 | 0 | 0
Unrealized (gain) loss on non-real estate investments | 346 | (546) | (239)
Change in assets and liabilities: |  |  |
Tenant and other receivables, net | 32,507 | 13,716 | (31,470)
Accrued rental income, net | (101,878) | (97,609) | (99,539)
Prepaid expenses and other assets | (4,148) | (5,384) | (7,336)
Right of use assets - operating lease | 0 | (750) | (25,640)
Lease liabilities - operating leases | (3,545) | (202) | (121)
Accounts payable and accrued expenses | 27,161 | (2,395) | 41,696
Accrued interest payable | (2,743) | (5,647) | 29,910
Other liabilities | (19,133) | 12,826 | 7,267
Tenant leasing costs | (122,618) | (118,962) | (77,666)
Total adjustments | 848,872 | 1,143,505 | 1,003,088
Net cash provided by operating activities | 1,245,157 | 1,234,501 | 1,301,520
Cash flows from investing activities: |  |  |
Acquisitions of real estate | (55,864) | (35,366) | 0
Construction in progress | (683,750) | (651,346) | (525,963)
Building, pre-development and other capital improvements | (216,687) | (189,667) | (171,424)
Tenant improvements | (338,808) | (258,312) | (310,925)
Proceeds from sales of real estate | 682,514 | 602 | 517
Acquisition of real estate upon consolidation of unconsolidated joint ventures (net of cash) | 0 | 6,086 | (13,155)
Capital contributions to unconsolidated joint ventures | (258,752) | (132,096) | (192,650)
Capital distributions from unconsolidated joint ventures | 172,662 | 28,325 | 32,787
Investment in non-real estate investments | (3,538) | (2,500) | (2,187)
Issuance of note receivables (including related party) | (22,861) | (3,258) | (12,177)
Proceeds from note receivables (including related party) | 80,000 | 0 | 0
Investments in securities, net | 558 | 136 | 1,496
Net cash used in investing activities | (644,526) | (1,237,396) | (1,193,681)
Cash flows from financing activities: |  |  |
Proceeds from mortgage notes payable | 0 | 0 | 600,000
Repayments of mortgage notes payable | (4,251) | (4,780) | 0
Proceeds from unsecured senior notes | 0 | 849,671 | 747,727
Redemption of unsecured senior notes | (850,000) | (700,000) | (500,000)
Proceeds from Convertible Debt | 1,000,000 | 0 | 0
Borrowings on unsecured line of credit | 865,000 | 0 | 0
Repayments of unsecured line of credit | (865,000) | 0 | 0
Borrowings on unsecured term loans | 700,000 | 0 | 1,200,000
Repayment of unsecured term loan | (700,000) | (500,000) | (730,000)
Finance Lease, Principal Payments | (13,662) | (12,547) | 0
Proceeds from Issuance of Commercial Paper | 8,656,025 | 5,363,333 | 0
Repayments of Commercial Paper | (8,406,025) | (4,863,333) | 0
Deferred financing costs | (39,641) | (12,235) | (19,416)
Capped call transactions premium | (35,000) | 0 | 0
Net activity from equity transactions | (435) | (1,731) | 367
Dividends and distributions | (643,107) | (689,870) | (687,809)
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships | 84,268 | 374,720 | 227,022
Distributions to noncontrolling interests in property partnerships | (83,129) | (77,704) | (69,975)
Acquisition of noncontrolling interests in property partnerships | (43,604) | 0 | 0
Net cash provided by (used in) financing activities | (378,561) | (274,476) | 767,916
Net increase (decrease) in cash and cash equivalents and cash held in escrows | 222,070 | (277,371) | 875,755
Cash and cash equivalents and cash held in escrows, beginning of period | 1,335,196 | 1,612,567 | 736,812
Cash and cash equivalents and cash held in escrows, end of period | 1,557,266 | 1,335,196 | 1,612,567
Reconciliation of cash and cash equivalents and cash held in escrow |  |  |
Cash and cash equivalents, beginning of period | 1,254,882 | 1,531,477 | 690,333
Cash held in escrows, beginning of period | 80,314 | 81,090 | 46,479
Cash and cash equivalents, end of period | 1,478,206 | 1,254,882 | 1,531,477
Cash held in escrows,end of period | 79,060 | 80,314 | 81,090
Supplemental disclosures: |  |  |
Cash paid for interest (net of amounts capitalized) | 677,156 | 676,067 | 553,989
Interest capitalized | 50,626 | 41,976 | 42,633
Non-cash investing and financing activities: |  |  |
Write-off of fully depreciated real estate | (155,440) | (112,074) | (133,844)
Change in real estate included in accounts payable and accrued expenses | 11,910 | (50,891) | 3,668
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 0 | 30,631 | 141,179
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 0 | 0 | 163,056
Finance Lease, Liability, Reversal from Re-Assessment | 0 | (38,491) | 0
Finance Lease, Right-of-Use Asset, Reversal from Re-Assessment | 0 | (28,962) | 0
Non-cash contributions from noncontrolling interests in property partnerships, net | (2,557) | 92,631 | 17,519
Capitalized operating lease costs | 8,732 | 30,195 | 12,580
Construction in progress from prepaid expenses and other assets | 0 | 0 | 25,577
Investment in unconsolidated joint ventures eliminated upon consolidation | 0 | (11,834) | 183,817
Mortgage notes payable recorded upon consolidation | 0 | 207,093 | 300,000
Mortgage note payable converted to unsecured term loan | 0 | 100,000 | 0
Real estate and intangibles recorded upon consolidation | 0 | (220,015) | (490,720)
Interest rate swaps recorded upon consolidation | 0 | 0 | (7,337)
Real estate contributed in exchange for investment in unconsolidated joint venture | (5,595) | 0 | 0
Investment in unconsolidated joint ventures funded by real estate contributed | 5,595 | 0 | 0
Dividends and distributions declared but not paid | 123,753 | 172,486 | 171,176
Conversions of noncontrolling interests to stockholders’ equity | 9,113 | 40,564 | 3,794
Issuance of restricted securities to employees and non-employee directors | $ 75,641 | $ 43,360 | $ 48,141

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