CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 64,847	$ 156,152
Short-term investments	401,583	311,140
Prepaid expenses and other current assets	10,282	7,180
Total current assets	476,712	474,472
Property and equipment, net	1,066	1,174
Operating lease right-of-use assets	2,925	4,130
Other assets	459	459
Long-term investments	13,545	80,882
Total assets	494,707	561,117
Current liabilities:
Accounts payable	951	2,660
Accrued expenses and other current liabilities	20,946	14,135
Income tax payable	0	4,282
Operating lease liabilities, current	1,547	1,421
Total current liabilities	23,444	22,498
Long-term liabilities:
Operating lease liabilities, net of current portion	2,446	3,590
Total liabilities	25,890	26,088
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of September 30, 2023 and December 31, 2022; 647,500 and no shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	0	0
Common stock, $0.0001 par value, 150,000,000 shares authorized as of September 30, 2023 and December 31, 2022; 42,760,644 and 45,796,449 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	4	5
Additional paid-in capital	646,918	585,320
Accumulated other comprehensive loss	(1,051)	(2,601)
Accumulated deficit	(177,054)	(47,695)
Total Cullinan stockholders' equity	468,817	535,029
Noncontrolling interests	0	0
Total stockholders' equity	468,817	535,029
Total liabilities and stockholders' equity	$ 494,707	$ 561,117