The following table summarizes stock-based compensation expense by financial statement line item in the Company’s condensed consolidated statements of operations and comprehensive loss for the periods presented (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Research and development	$	4,822	$	8,517	$	12,845	$	17,510
General and administrative	2,527		8,770		9,930		16,194
Cost of other revenue	246		1,516		673		2,485
Total	$	7,595	$	18,803	$	23,448	$	36,189

The Company grants stock-based incentive awards pursuant to the 2021 Incentive Award Plan (the “2021 Plan”) and the 2022 Inducement Plan (the “2022 Inducement Plan”). As of June 30, 2026, there were 4,304,034 shares and 298,803 shares available for future issuance under the 2021 Plan and the 2022 Inducement Plan, respectively.

Restricted stock unit (“RSU”) awards granted before 2025 generally had a four-year requisite service period, with 25% of the shares vesting on the first anniversary of the grant date and the remainder vesting monthly thereafter. RSU awards granted in March 2026 and after will vest in equal quarterly installments through January 2027.


	Number of Shares	Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2025	1,262,853	$	55.07
Granted	704,507	7.20
Vested	(598,188)	34.08
Forfeited	(438,666)	46.67
Nonvested as of June 30, 2026	930,506	36.28

The weighted average grant date fair value of RSUs granted during the six months ended June 30, 2026 and June 30, 2025 was $7.20 and $7.95, respectively.

As of June 30, 2026, there was $27.6 million of unrecognized compensation expense related to RSUs recognizable over a weighted-average period of 1.4 years.

In March 2025, the compensation committee of the Company's Board of Directors approved a grant of performance-based restricted stock unit (“PSU”) awards under the 2021 Plan to substantially all employees. The PSUs were eligible to vest based on the achievement of specific performance metrics tied to the Company’s 2025 cash flow and bookings targets. PSU achievement percentages ranged from 49% to 100% of the award. The grant-date fair value of the PSUs was determined based on the closing price of the Company’s Class A common stock on the grant date.

In March 2026, the compensation committee of the Company's Board of Directors approved a grant of PSU awards under the 2021 Plan to substantially all employees. The PSUs are eligible to vest based on the achievement of specific performance metrics tied to the Company’s 2026 cash flow and bookings targets. Recipients must remain employed through the date the applicable vested shares are distributed, which is expected to occur in March 2027. PSU achievement percentages may range from zero to 100% of the award. The grant-date fair value of the PSUs was determined based on the closing price of the Company’s Class A common stock on the grant date.


	Number of Shares	Weighted Average Grant Date Fair Value
Nonvested as of December 31, 2025	4,407,287	$	8.06
Granted	3,102,611	7.06
Vested	(3,107,417)	8.04
Forfeited	(1,852,377)	7.78
Nonvested as of June 30, 2026	2,550,104	7.06