Segments (Tables)

6 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

Summary of the Segment Profit or Loss, Including Significant Segment Expenses

The following table is a summary of the segment profit or loss, including significant segment expenses (in thousands):


		Three Months Ended June 30,								Six Months Ended June 30,
		2025				2024				2025				2024
Segment expenses:
Trem-cel(a)		$	3,095			$	3,619			$	9,477			$	8,480
VCAR33(a)			2,419				1,762				6,055				4,362
Other research and development(a)			225,144				3,177				228,139				6,294
Salaries and benefits			17,863				10,404				29,476				22,517
General corporate activities			16,694				4,947				21,863				10,246
Other segment items(b)			1,308,454				3,930				1,311,145				6,744
Segment expenses:			1,573,669				27,839				1,606,155				58,643
Segment net loss		$	(1,573,669	)		$	(27,839	)		$	(1,606,155	)		$	(58,643	)

(a) Includes only external research and development expenditures.

(b) Other segment items are primarily comprised of taxes, interest income on marketable securities and certain non-cash expenses such as change in fair value of warrant liabilities, stock-based compensation, depreciation expense, and non-cash lease expense.