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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Summary of Stock Option Activity
A summary of stock option activity under the 2012 Plan and the 2021 Plan, including 1,061,250 stock options that were granted outside of the 2012 Plan in 2019, is presented below (in millions, except share and per share amounts):
 Number of
Options
Weighted Average
Exercise Price
Weighted Average
Remaining
Contract Term
(in years)
Aggregate Intrinsic Value (1)
Balances as of December 31, 2021
54,525,539 $5.30 7.1$221.3 
Granted75,376 8.10 
Exercised(2,594,589)2.10 
Forfeited(652,838)7.05 
Balances as of March 31, 2022
51,353,488 $5.45 6.9$143.9 
Exercisable and vested at March 31, 2022
33,974,772 $4.36 6.3$123.8 
(1)The aggregate intrinsic values have been calculated using the Company’s closing stock prices of $7.86 and $9.09 as of March 31, 2022 and December 31, 2021, respectively.
Summary of Restricted Stock Units Activity
A summary of RSU activity under the 2012 Plan and the 2021 Plan is presented below:
 Number of AwardsWeighted Average
 Grant Date Fair
 Value
Balances as of December 31, 2021
54,517,930 $10.29 
Granted25,945,789 7.57 
Vested and converted to common stock (1)
(16,011,880)8.07 
Forfeited(1,989,206)13.00 
Balances as of March 31, 2022
62,462,633 $9.64 
(1)During the three months ended March 31, 2022, the Company net settled all RSUs through which it issued an aggregate of 15,103,426 shares of Class A common stock and withheld an aggregate of 908,454 shares of Class A common stock to satisfy $7.4 million million of tax withholding obligations on behalf of the Company’s employees.
Summary of Share-based Payment Arrangement, Expensed and Capitalized, Amount
Total stock-based compensation expense included in the condensed consolidated statements of operations for the three months ended March 31, 2022 and 2021 is as follows (in millions):
 Three Months Ended March 31,
 20222021
Commissions and other related expense$17.0 $44.6 
Sales and marketing10.7 9.0 
Operations and support4.3 5.0 
Research and development16.9 49.5 
General and administrative14.9 59.4 
Total stock-based compensation expense$63.8 $167.5 
 IPO Related
Expense
Commissions and other related expense$41.7 
Sales and marketing1.8 
Operations and support3.1 
Research and development46.9 
General and administrative55.0 
Total stock-based compensation expense$148.5