Net Loss per Share Attributable to Common Stockholders of Cullinan (Tables)

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Summary of Calculation of Basic and Diluted Net Loss Per Share

The following table sets forth the calculation of basic and diluted net loss per share attributable to common stockholders of Cullinan for the three and six months ended June 30, 2024 and 2023 (in thousands, except per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
Numerator:
Net loss attributable to common stockholders of Cullinan	$	(42,028	)	$	(32,214	)	$	(79,176	)	$	(90,176	)
Denominator:
Weighted-average common stock outstanding — basic and diluted		55,052			39,952			49,031			40,315
Net loss per share attributable to common stockholders of Cullinan:
Basic and diluted	$	(0.75	)	$	(0.82	)	$	(1.61	)	$	(2.24	)

Summary of Outstanding Equity Instruments Excluded from Computation of Diluted Net Income (Loss) Per Share

The following table sets forth potential common shares that were excluded from the computation of diluted net loss per share attributable to common stockholders of Cullinan for the six months ended June 30, 2024 and 2023 because their effect would have been anti-dilutive (in thousands):

	Six Months Ended June 30,
	2024		2023
Stock options		8,289		9,185
Preferred stock		6,475		5,795
Restricted stock awards and units		301		156
Employee stock purchase plan		7		—
Total		15,072		15,136