CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 115,021	$ 98,434
Short-term investments	547,474	368,633
Prepaid expenses and other current assets	15,304	13,124
Total current assets	677,799	480,191
Property and equipment, net	836	989
Operating lease right-of-use assets	2,121	2,543
Other assets	460	459
Total assets	681,216	484,182
Current liabilities:
Accounts payable	1,555	2,493
Accrued expenses and other current liabilities	20,706	24,204
Operating lease liabilities, current	1,215	1,440
Total current liabilities	23,476	28,137
Long-term liabilities:
Operating lease liabilities, net of current portion	1,519	2,150
Total liabilities	24,995	30,287
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 647,500 shares issued and outstanding as of June 30, 2024 and December 31, 2023	0	0
Common stock, $0.0001 par value, 150,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 57,871,638 and 42,900,083 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively	6	4
Additional paid-in capital	936,724	654,685
Accumulated other comprehensive loss	(476)	(129)
Accumulated deficit	(280,033)	(200,857)
Total Cullinan stockholders' equity	656,221	453,703
Noncontrolling interests	0	192
Total stockholders' equity	656,221	453,895
Total liabilities and stockholders' equity	$ 681,216	$ 484,182