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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award  
Schedule of Share-based Compensation Expense
The following table presents the share-based compensation expense recognized in the periods presented:
Year Ended December 31,
202220212020
Restricted stock units$76,094 $59,652 $— 
Stock options28,816 31,231 10,895 
Executive Chairman Long-Term Performance Award53,214 38,189 — 
Employee Stock Purchase Plan2,619 1,946 — 
Secondary sales of common stock— 11,642 17,316 
Total$160,743 $142,660 $28,211 
A summary of the Company's RSUs activity under the Plans was as follows:
Number of Restricted Stock UnitsWeighted-average grant date fair value per share
Balance as of December 31, 20204,430,336 $4.93 
Granted8,409,821 22.20 
Vested(2,641,196)10.12 
Canceled and forfeited(1,197,012)14.23 
Balance as of December 31, 2021
9,001,949 $18.30 
Granted36,159,090 8.91 
Vested(4,883,296)13.99
Canceled and forfeited(6,131,197)14.07 
Balance as of December 31, 2022
34,146,546 $9.74 
A summary of the Company's stock option activity under the Plans was as follows:
Number of OptionsWeighted-Average Exercise Price per ShareWeighted-Average Remaining Contractual Life (Years)
Aggregate Intrinsic Value(1)
Balance as of January 1, 2020(2)
25,159,411 $0.92 8.74$46,594 
Granted6,404,800 2.31 
Exercised(6,084,183)0.53 
Canceled and forfeited(2,058,654)1.50 
Balance as of December 31, 2020(2)
23,421,374 $1.35 8.33$248,002 
Granted29,113,555 20.07 
Exercised(4,277,344)1.18 
Canceled and forfeited(4,072,097)5.58 
Balance as of December 31, 2021(2)
44,185,488 $13.31 8.46$279,242 
Granted4,182,522 10.16 
Exercised(7,785,748)1.20 
Canceled and forfeited(4,425,817)6.60 
Balance as of December 31, 2022(2)
36,156,445$16.37 7.67$29,101 
Vested as of December 31, 2022
7,389,512$6.57 4.98$24,410 
(1) Intrinsic value based is calculated based on the difference between the exercise price of in-the-money-stock options and the fair value of the common stock as of the respective balance sheet dates.
(2) The 2011 Plan allows for early exercise of stock options and these balances include all exercisable stock options regardless of vesting status.
The Executive Chairman Long-Term Performance Award is divided into seven equal tranches which vest upon the achievement of the following Company stock price hurdles:
TrancheCompany Stock Price HurdleNumber of Options Eligible to Vest
1$67.502,826,884
2$78.982,826,884
3$92.402,826,884
4$108.112,826,884
5$126.492,826,884
6$147.992,826,884
7$173.152,826,884
Total19,788,188
Stock Options  
Share-based Compensation Arrangement by Share-based Payment Award  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair values of stock options granted were estimated using the Black-Scholes option pricing model and the following weighted-average assumptions:
Year Ended December 31,
202220212020
Dividend yield0.0%0.0%0.0%
Expected volatility61.52%52.36%48.11%
Expected term (in years)6.086.146.02
Risk-free interest rate2.32%1.00%0.54%