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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 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 1.1 million 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 
Granted215,027 5.89 
Exercised(3,532,188)2.14 
Forfeited(1,315,060)6.96 
Balances as of June 30, 2022
49,893,318 $5.49 6.6$25.7 
Exercisable and vested at June 30, 2022
34,382,199 $4.49 5.9$25.7 
(1)The aggregate intrinsic values have been calculated using the Company’s closing stock prices of $3.61 and $9.09 as of June 30, 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 
Granted31,015,818 7.21 
Vested and converted to common stock (1)
(18,926,274)8.64 
Forfeited(6,869,161)12.49 
Balances as of June 30, 2022
59,738,313 $8.96 
(1)During the six months ended June 30, 2022, the Company net settled all RSUs through which it issued an aggregate of 18.9 million shares of Class A common stock and withheld an aggregate of 1.9 million shares of Class A common stock to satisfy $13.8 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 and six months ended June 30, 2022 and 2021 is as follows (in millions):
 Three Months Ended June 30,Six Months Ended June 30,
 2022202120222021
Commissions and other related expense$6.4 $11.7 $23.4 $56.3 
Sales and marketing11.2 8.6 21.9 17.6 
Operations and support4.1 2.8 8.4 7.8 
Research and development18.9 13.5 35.8 63.0 
General and administrative18.6 17.7 33.5 77.1 
Total stock-based compensation expense$59.2 $54.3 $123.0 $221.8 
 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