CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 242,657	$ 59,774
Short-term investments	333,294	230,692
Prepaid expenses and other current assets	6,124	6,098
Total current assets	582,075	296,564
Property and equipment, net	792	77
Operating lease right-of-use assets	4,496	0
Other assets	460	147
Long-term investments	29,414	140,397
Total assets	617,237	437,185
Current liabilities:
Accounts payable	1,516	3,169
Accrued expenses and other current liabilities	13,507	8,577
Income tax payable	11,398	0
Operating lease liabilities, current	696	0
Total current liabilities	27,117	11,746
Long-term liabilities:
Operating lease liabilities, net of current portion	3,992	0
Deferred rent	0	65
Total liabilities	31,109	11,811
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.0001 par value, 150,000,000 shares authorized as of September 30, 2022 and December 31, 2021; 45,743,027 and 44,292,102 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively	5	4
Additional paid-in capital	610,965	584,714
Accumulated other comprehensive loss	(3,929)	(838)
Accumulated deficit	(20,913)	(158,909)
Total Cullinan stockholders' equity	586,128	424,971
Noncontrolling interests	0	403
Total stockholders' equity	586,128	425,374
Total liabilities and stockholders' equity	$ 617,237	$ 437,185