Net Loss per Share

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Net Loss per Share

(13) Net Loss per Share

The following table sets forth the calculation of basic and diluted net loss per share:

	Three Months Ended March 31,
	2020			2021
	(in thousands, except share and per share data)
Numerator:
Net loss attributable to common stockholders of Cullinan	$	(4,973	)	$	(70	)
Denominator
Total weighted-average shares used in computing net loss per share, basic and diluted		18,747,004			41,977,336
Net Loss per Share:	$	(0.27	)	$	(0.00	)

The following outstanding equity instruments were excluded from the computation of the diluted net loss per share for the periods presented because their effect would have been anti-dilutive:

	Three Months Ended March 31,
	2020		2021
Restricted stock awards		478,293		242,411
Stock options		—		6,600,953
Estimated shares issuable under the ESPP		—		10,101
Total		478,293		6,853,465