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Stock Option and Incentive Plan (Tables)
12 Months Ended
Dec. 31, 2021
Text Block [Abstract]  
Share-based Payment Arrangement, Option, Activity
A summary of the status of Boston Properties, Inc.’s stock options as of December 31, 2021, 2020 and 2019 and changes during the years then ended are presented below:
SharesWeighted-Average
Exercise Price
Outstanding at December 31, 2018540,441 $96.35 
Exercised(145,088)$96.27 
Outstanding at December 31, 2019395,353 $96.37 
Exercised(43,792)$91.60 
Outstanding at December 31, 2020351,561 $96.97 
Exercised(247,920)$96.95 
Outstanding at December 31, 2021103,641 $97.01 
Schedule of Stock Options Outstanding
The following table summarizes information about Boston Properties, Inc.’s stock options outstanding at December 31, 2021: 
Options OutstandingOptions Exercisable
Number Outstanding at 12/31/21Weighted-Average Remaining
Contractual Life

Exercise Price
Number Exercisable at 12/31/21Exercise Price
54,282 1.3 years$95.69 54,282 $95.69 
49,359 1.1 years$98.46 49,359 $98.46