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Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2022
Stockholders' Equity Note [Abstract]  
Schedule of Stock Option Activity

Stock option activity under the Plans, including the EPA Program discussed below is as follows:

 

 

 

Number of
Shares
Outstanding
(in thousands)

 

 

Weighted
Average
Exercise Price

 

 

Weighted
Average
Remaining
Contractual
Term
(Years)

 

 

Intrinsic value
(in thousands)

 

Balance as of December 31, 2021(1)

 

 

53,078

 

 

$

7.74

 

 

 

6.78

 

 

 

 

Cancelled and forfeited (2)

 

 

(1,207

)

 

 

16.82

 

 

 

 

 

 

 

Exercised

 

 

(3,261

)

 

 

1.44

 

 

 

 

 

 

 

Balance as of September 30, 2022

 

 

48,610

 

 

$

7.94

 

 

 

6.13

 

 

$

225,633

 

Vested and expected to vest as of September 30, 2022(3)

 

 

40,295

 

 

$

4.82

 

 

 

5.49

 

 

$

225,633

 

Vested and exercisable as of September 30, 2022

 

 

30,765

 

 

$

1.68

 

 

 

4.58

 

 

$

207,022

 

(1) This includes 14.7 million options granted in December 2021 pursuant to the EPA Program.

(2) This includes 0.8 million options forfeited from the EPA program.

(3) This includes 5.5 million options granted pursuant to the EPA Program that are currently expected to vest. None of the options granted pursuant to the EPA Program were vested and exercisable as of September 30, 2022.
 

Summary of Vesting Tranches

Each of the five Tranches vest only if the Company achieves one of the business milestones (in addition to the business milestones already achieved in a prior Tranche) and achieves the applicable stock price target on or after the business milestone is achieved, within 10 years of the initial grants. Additionally, in order to vest in any Tranche, Participants generally must continue to provide service through the date of vesting in the same position, or a similar or higher role, as when the EPA Program awards are granted.

Tranche

 

Business Milestone Requirement

 

Stock Price Target

1

 

Achievement of 1 business milestone

 

$60

2

 

Achievement of 2 business milestones (inclusive of the business milestone applicable to Tranche 1)

 

$120

3

 

Achievement of 3 business milestones (inclusive of the business milestone applicable to Tranche 2)

 

$180

4

 

Achievement of 4 business milestones (inclusive of the business milestone applicable to Tranche 3)

 

$240

5

 

Achievement of 5 business milestones (inclusive of the business milestone applicable to Tranche 4)

 

$300

 

Schedule of Restricted Stock Unit Activity

Restricted stock unit activity under the Plans are as follows:

 

 

 

Number of
Restricted
Stock Units
(in thousands)

 

 

Weighted
Average Grant
Date Fair Value

 

Balance as of December 31, 2021

 

 

10,555

 

 

$

14.48

 

Granted

 

 

10,467

 

 

 

14.17

 

Vested

 

 

(3,795

)

 

 

12.79

 

Forfeited

 

 

(849

)

 

 

16.33

 

Balance as of September 30, 2022

 

 

16,378

 

 

$

14.52

 

 

 

 

 

 

 

 

 

Schedule of Stock-based Compensation Expense

Total stock-based compensation expense recognized in the accompanying Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) for all equity awards is as follows (amounts in thousands):

 

 

 

Three Months Ended September 30,

 

 

Nine Months Ended September 30,

 

 

 

2022

 

 

2021

 

 

2022

 

 

2021

 

Research and development

 

$

17,233

 

 

$

7,489

 

 

$

45,255

 

 

$

20,490

 

General and administrative

 

 

16,345

 

 

 

5,238

 

 

 

47,730

 

 

 

15,520

 

Total stock-based compensation expense

 

$

33,578

 

 

$

12,727

 

 

$

92,985

 

 

$

36,010