v3.26.3
Equity Incentive Plans (Tables)
 9 Months Ended
Sep. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense
Total stock-based compensation expense by function was as follows (in millions):
Three Months Ended
September 30,		Nine Months Ended
September 30,
2026202520262025
Research and development
$43 $41 $126 $114 
Selling, general, and administrative11 10 34 26 
Total
$54 $51 $160 $140 
Schedule of Restricted Stock Unit Activity
RSU activity under the Plan and the 2017 Plan was as follows (in millions, except per share amounts):
Number of
shares		Weighted-
average grant
date fair value
Unvested at December 31, 2025
80 $5.12 
Granted
73 4.71 
Vested(32)4.40 
Forfeited
(12)4.90 
Unvested at September 30, 2026
109 $5.08 
Schedule of Stock Option Valuation Assumptions
Stock options granted under the Plan during the nine months ended September 30, 2026 were as follows:
Nine Months Ended
September 30, 2026
Stock options granted (in millions)1 
Weighted average grant date fair value$3.18 
Weighted average grant date fair value assumptions:
Expected term
6.5 years
Risk-free interest rates
4.1 %
Expected volatility79.1 %
Schedule of Stock Option Activity
Stock option activity under the Plan and the 2017 Plan was as follows (in millions, except per share amounts):
Number of
shares		Weighted
average
exercise price		Weighted average remaining contractual term (in years)Aggregate intrinsic value
Outstanding at December 31, 2025
91 $2.21 
Granted1 4.38 
Exercised
(12)1.89 
Forfeited
(3)2.77 
Outstanding at September 30, 2026
77 $2.26 6.0$245 
Exercisable at September 30, 2026
60 $2.03 5.6$204