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Consolidated Balance Sheets - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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ASSETS |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | $ 28,241,879 | $ 27,870,623
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 372,470 | 372,922
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 325,841 | 334,767
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (8,040,311) | (7,528,057)
Total real estate | 20,899,879 | 21,050,255
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 1,478,206 | 1,254,882
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 79,060 | 80,314
Investments in securities | 44,614 | 39,706
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 92,625 | 107,453
Sales-type lease receivable, net | 15,672 | 14,657
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 1,538,515 | 1,466,220
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 847,690 | 813,345
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 108,105 | 70,839
Investments in unconsolidated joint ventures | 999,309 | 1,093,583
Assets held for sale | 24,770 | 0
Total assets | 26,166,164 | 26,084,980
Liabilities: |  |
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 4,280,067 | 4,276,609
Unsecured senior notes, net | 9,806,100 | 10,645,077
Unsecured exchangeable senior notes, net | 976,263 | 0
Unsecured line of credit | 0 | 0
Unsecured term loans, net | 797,053 | 798,813
Unsecured commercial paper | 750,000 | 500,000
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 360,039 | 370,885
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 389,213 | 392,686
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 480,017 | 401,874
Dividends and distributions payable | 123,753 | 172,486
Accrued interest payable | 125,345 | 128,098
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | 386,074 | 450,796
Total liabilities | 18,473,924 | 18,137,324
Redeemable deferred stock units— 111,701 and 128,227 units outstanding at redemption value at December 31, 2025 and December 31, 2024, respectively | $ 7,538 | $ 9,535
Excess stock, shares outstanding | 0 | 0
Excess stock, shares issued | 0 | 0
Preferred stock / units, shares / units issued (in shares / units) | 0 | 0
Preferred stock / units, shares / units outstanding (in shares / units) | 0 | 0
Equity / Capital: |  |
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding | $ 0 | $ 0
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding | 0 | 0
Common stock, $0.01 par value, 250,000,000 shares authorized, 158,627,198 and 158,253,895 issued and 158,548,298 and 158,174,995 outstanding at December 31, 2025 and December 31, 2024, respectively | 1,585 | 1,582
Additional paid-in capital | 6,836,243 | 6,836,093
Dividends in excess of earnings | $ (1,674,995) | $ (1,419,575)
Treasury common stock at cost, shares | 78,900 | 78,900
Treasury common stock at cost, 78,900 shares at December 31, 2025 and December 31, 2024 | $ (2,722) | $ (2,722)
Accumulated other comprehensive loss | (12,921) | (2,072)
Total stockholders' equity attributable to BXP, Inc. | 5,147,190 | 5,413,306
Noncontrolling interests: |  |
Common units of the Operating Partnership | 566,563 | 591,270
Property partnerships | 1,970,949 | 1,933,545
Total equity / capital | 7,684,702 | 7,938,121
Total liabilities and equity / capital | 26,166,164 | 26,084,980
Nonrelated Party |  |
ASSETS |  |
Related party note receivable, net | 9,373 | 4,947
Related Party |  |
ASSETS |  |
Related party note receivable, net | 28,346 | 88,779
Liabilities: |  |
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 800 | 700
Variable Interest Entity, Primary Beneficiary [Member] |  |
ASSETS |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | 8,005,124 | 7,797,430
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 21,000 | 21,000
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 0 | 140,558
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (1,763,988) | (1,628,274)
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 255,631 | 373,737
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 10,319 | 4,979
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 30,989 | 20,435
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 470,734 | 435,110
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 204,924 | 211,726
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 14,509 | 15,036
Liabilities: |  |
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 3,286,870 | 3,282,027
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 21,074 | 20,931
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 0 | 157,691
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 88,849 | 115,808
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | 95,209 | 126,202
Boston Properties Limited Partnership |  |
ASSETS |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | 27,884,397 | 27,504,358
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 372,470 | 372,922
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 325,841 | 334,767
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (7,906,629) | (7,397,882)
Total real estate | 20,676,079 | 20,814,165
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 1,478,206 | 1,254,882
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 79,060 | 80,314
Investments in securities | 44,614 | 39,706
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 92,625 | 107,453
Sales-type lease receivable, net | 15,672 | 14,657
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 1,538,515 | 1,466,220
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 847,690 | 813,345
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 108,105 | 70,839
Investments in unconsolidated joint ventures | 999,309 | 1,093,583
Assets held for sale | 24,770 | 0
Total assets | 25,942,364 | 25,848,890
Liabilities: |  |
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 4,280,067 | 4,276,609
Unsecured senior notes, net | 9,806,100 | 10,645,077
Unsecured exchangeable senior notes, net | 976,263 | 0
Unsecured line of credit | 0 | 0
Unsecured term loans, net | 797,053 | 798,813
Unsecured commercial paper | 750,000 | 500,000
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 360,039 | 370,885
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 389,213 | 392,686
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 480,017 | 401,874
Dividends and distributions payable | 123,753 | 172,486
Accrued interest payable | 125,345 | 128,098
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | 386,074 | 450,796
Total liabilities | 18,473,924 | 18,137,324
Redeemable deferred stock units— 111,701 and 128,227 units outstanding at redemption value at December 31, 2025 and December 31, 2024, respectively | 7,538 | 9,535
Noncontrolling interest: |  |
Redeemable partnership units— 15,590,009 and 15,730,882 common units and 2,662,140 and 2,335,229 long term incentive units outstanding at redemption value at December 31, 2025 and December 31, 2024, respectively | 1,272,719 | 1,378,573
Equity / Capital: |  |
Boston Properties Limited Partnership partners’ capital— 1,768,004 and 1,762,411 general partner units and 156,780,294 and 156,412,584 limited partner units outstanding at December 31, 2025 and December 31, 2024, respectively | 4,230,155 | 4,391,985
Accumulated other comprehensive loss | (12,921) | (2,072)
Total partners’ capital | 4,217,234 | 4,389,913
Noncontrolling interests in property partnerships | 1,970,949 | 1,933,545
Noncontrolling interests: |  |
Total equity / capital | 6,188,183 | 6,323,458
Total liabilities and equity / capital | 25,942,364 | 25,848,890
Boston Properties Limited Partnership | Nonrelated Party |  |
ASSETS |  |
Related party note receivable, net | 9,373 | 4,947
Boston Properties Limited Partnership | Related Party |  |
ASSETS |  |
Related party note receivable, net | 28,346 | 88,779
Boston Properties Limited Partnership | Variable Interest Entity, Primary Beneficiary [Member] |  |
ASSETS |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | 8,005,124 | 7,797,430
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 21,000 | 21,000
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 0 | 140,558
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (1,763,988) | (1,628,274)
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 255,631 | 373,737
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 10,319 | 4,979
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 30,989 | 20,435
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 470,734 | 435,110
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 204,924 | 211,726
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 14,509 | 15,036
Liabilities: |  |
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 3,286,870 | 3,282,027
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 21,074 | 20,931
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 0 | 157,691
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 88,849 | 115,808
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | $ 95,209 | $ 126,202

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