CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 141,834	$ 156,152
Short-term investments	349,964	311,140
Prepaid expenses and other current assets	6,437	7,180
Total current assets	498,235	474,472
Property and equipment, net	1,158	1,174
Operating lease right-of-use assets	3,501	4,130
Other assets	459	459
Long-term investments	18,631	80,882
Total assets	521,984	561,117
Current liabilities:
Accounts payable	2,493	2,660
Accrued expenses and other current liabilities	15,531	14,135
Income tax payable	0	4,282
Operating lease liabilities, current	1,652	1,421
Total current liabilities	19,676	22,498
Long-term liabilities:
Operating lease liabilities, net of current portion	2,734	3,590
Total liabilities	22,410	26,088
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of June 30, 2023 and December 31, 2022; 647,500 and no shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively.	0	0
Common stock, $0.0001 par value, 150,000,000 shares authorized as of June 30, 2023 and December 31, 2022; 42,735,304 and 45,796,449 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively	4	5
Additional paid-in capital	639,066	585,320
Accumulated other comprehensive loss	(1,625)	(2,601)
Accumulated deficit	(137,871)	(47,695)
Total Cullinan stockholders' equity	499,574	535,029
Noncontrolling interests	0	0
Total stockholders' equity	499,574	535,029
Total liabilities and stockholders' equity	$ 521,984	$ 561,117