v3.26.1
Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2026
Share-Based Payment Arrangement [Abstract]  
Summary of Stock-Based Compensation Expense

Total stock-based compensation expense recorded related to awards granted to employees and non-employees was as follows (in thousands):

 

 

 

Three Months Ended March 31,

 

 

 

2026

 

2025

 

Research and development

 

$

8,353

 

$

6,020

 

General and administrative

 

 

6,183

 

 

4,217

 

Total stock-based compensation expense

 

$

14,536

 

$

10,237

 

 

 

Summary of Activity under Plans

Activity under the Company’s 2015 and 2019 Plans and 2023 Inducement Plan is set forth below:

 

 

 

Outstanding Options

 

 

 

 

 

 

 

 

 

Shares

 

 

Weighted-
Average
Exercise
Price

 

 

Weighted-
Average
Remaining
Contractual
Term (Years)

 

 

Aggregate Intrinsic Value (Millions)

 

Balance, January 1, 2026

 

 

11,130,405

 

 

$

24.35

 

 

 

7.76

 

 

$

136.76

 

Options granted

 

 

3,821,341

 

 

$

32.17

 

 

 

 

 

 

 

Options exercised

 

 

(59,593

)

 

$

20.05

 

 

 

 

 

 

 

Options canceled

 

 

(64,004

)

 

$

26.48

 

 

 

 

 

 

 

Options expired

 

 

(2,825

)

 

$

46.22

 

 

 

 

 

 

 

Balance, March 31, 2026

 

 

14,825,324

 

 

$

26.37

 

 

 

8.06

 

 

$

121.46

 

Exercisable as of March 31, 2026

 

 

6,092,104

 

 

$

22.74

 

 

 

6.61

 

 

$

75.46

 

Vested and expected to vest as of
   March 31, 2026

 

 

14,825,324

 

 

$

26.37

 

 

 

8.06

 

 

$

121.46

 

Assumptions Used to Calculate Fair Values of Options

The fair values of options were calculated using the assumptions set forth below:

 

 

Three Months Ended March 31,

 

 

2026

 

2025

Expected term

 

6.1 years

 

6.1 years

Expected volatility

 

69.6% - 70.5%

 

75.7% - 76.3%

Risk-free interest rate

 

3.7% - 4.2%

 

4.1% - 4.4%

Dividend yield

 

0%

 

0%