Consolidated Statements of Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue
Collaborations, milestones, and royalties	$ 17,796	$ 59,164	$ 57,700	$ 123,649
Operating expenses
Research and development	58,226	64,941	176,630	190,553
General and administrative	14,767	12,493	46,300	38,107
Total operating expenses	72,993	77,434	222,930	228,660
Loss from operations	(55,197)	(18,270)	(165,230)	(105,011)
Other income (expense)
Interest income	7,537	5,023	23,766	11,693
Interest expense	(9,026)	(7)	(27,984)	(21)
Other (expense) income, net	(10)	8	(14)	(14)
Impairment on equity securities	0	0	(20,430)	0
Gain (loss) on equity securities, net	9,254	(11,023)	(448)	(13,633)
Total other income (expense), net	7,755	(5,999)	(25,110)	(1,975)
Net loss	(47,442)	(24,269)	(190,340)	(106,986)
Net loss attributable to non-controlling interest	(1,154)	0	(3,275)	0
Net loss attributable to Xencor, Inc.	$ (46,288)	$ (24,269)	$ (187,065)	$ (106,986)
Basic net loss per common share attributable to Xencor, Inc. (in dollars per share)	$ (0.72)	$ (0.40)	$ (3.00)	$ (1.77)
Diluted net loss per common share attributable to Xencor, Inc. (in dollars per share)	$ (0.72)	$ (0.40)	$ (3.00)	$ (1.77)
Weighted average shares used to compute net income (loss) per share attributable to common stockholders:
Basic weighted average common shares outstanding (in shares)	64,022,547	60,621,534	62,310,045	60,387,163
Diluted weighted average common shares outstanding (in shares)	64,022,547	60,621,534	62,310,045	60,387,163