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v3.25.4

Stock Option and Incentive Plan (Tables) | 12 Months Ended
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Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-Based Compensation, Employee Stock Purchase Plan, Activity | Information for the Common Stock issues under the Stock Purchase Plan during the years ended December 31, 2025, 2024 and 2023 is as follows:
|  | 2025 |  | 2024 |  | 2023
Shares issued |  | 13,302 |  |  | 17,237 |  |  | 18,552 |
Weighted average price per share |  | $ | 61.67 |  |  | $ | 56.28 |  |  | $ | 51.93 |
2020-2022 Vested MYLTIPs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] | The following table shows the results for the MYLTIP awards at the end of their respective three-year measurement period (Aggregate value is shown in millions):
| Measurement Date |  | Final Payout as a % of Target |  | Aggregate Value |  | Forfeited Units
2022 MYLTIP Awards | January 31, 2025 |  | 59 | % |  | $ | 5.4 |  |  | 177,919 |
2021 MYLTIP Awards | February 1, 2024 |  | 112 | % |  | $ | 12.6 |  |  | 155,625 |
2020 MYLTIP Awards | February 3, 2023 |  | 50 | % |  | $ | 3.8 |  |  | 152,460 |
Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest | The following table shows information for restricted stock that were issued by BXP during the years ended December 31, 2025, 2024 and 2023 (Issued value is shown in millions):
Restricted Stock |  | 2025 |  | 2024 |  | 2023
Shares issued |  | 56,273 |  |  | 83,316 |  |  | 73,762 |
Issued value |  | $ | 4.1 |  |  | $ | 5.3 |  |  | $ | 5.4 |
Weighted-average price per share |  | $ | 72.37 |  |  | $ | 63.28 |  |  | $ | 72.57 |
LTIP Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest | The following table shows information for LTIP units that were issued by BPLP during the years ended December 31, 2025, 2024 and 2023 (Issued value is shown in millions):
LTIP Units |  | 2025 |  | 2024 |  | 2023
Units Issued |  | 406,646 |  |  | 451,044 |  |  | 430,824 |
Issued value |  | $ | 26.9 |  |  | $ | 26.8 |  |  | $ | 29.9 |
Weighted-average price per unit |  | $ | 66.10 |  |  | $ | 59.41 |  |  | $ | 69.29 |
Monte Carlo assumptions (1): |  |  |  |  |  |
Expected life (in years) |  | 5.7 |  | 5.7 |  | 5.7
Risk free interest rate |  | 4.45 | % |  | 4.03 | % |  | 3.67 | %
Expected price volatility |  | 38.0 | % |  | 36.0 | % |  | 32.0 | %
_______________ (1)LTIP Units were valued using a Monte Carlo simulation method model in accordance with the provisions of ASC 718.
MYLTIP |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest | The following table shows information for MYLTIP Units that were issued by BPLP during the years ended December 31, 2025, 2024 and 2023:
MYLTIP Units |  | 2025 |  | 2024 |  | 2023
Units Issued |  | 354,940 |  |  | 330,479 |  |  | 322,053 |
2025 OPP |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shared-based Compensation Arrangement by Share-based Payment Award, Performance requirement | At a Dividend-Adjusted Stock Price Performance equal to or greater than $90.00, an approximately 30% increase from the closing stock price on the Grant Date, the LTIP Units will be earned as follows (subject to the additional service-based vesting requirements described below):
Performance Tier |  | Dividend-Adjusted Stock Price Performance |  | Percentage of Award Earned
Eight |  | $118.00 |  | 100.0%
Seven |  | $114.00 |  | 87.5%
Six |  | $110.00 |  | 75.0%
Five |  | $106.00 |  | 62.5%
Four |  | $102.00 |  | 50.0%
Three |  | $98.00 |  | 37.5%
Two |  | $94.00 |  | 25.0%
One |  | $90.00 |  | 12.5%

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