CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 74,228	$ 98,434
Short-term investments	358,783	368,633
Prepaid expenses and other current assets	12,710	13,124
Total current assets	445,721	480,191
Property and equipment, net	913	989
Operating lease right-of-use assets	2,336	2,543
Other assets	460	459
Total assets	449,430	484,182
Current liabilities:
Accounts payable	3,707	2,493
Accrued expenses and other current liabilities	16,889	24,204
Operating lease liabilities, current	1,329	1,440
Total current liabilities	21,925	28,137
Long-term liabilities:
Operating lease liabilities, net of current portion	1,840	2,150
Total liabilities	23,765	30,287
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of March 31, 2024 and December 31, 2023; 647,500 shares issued and outstanding as of March 31, 2024 and December 31, 2023	0	0
Common stock, $0.0001 par value, 150,000,000 shares authorized as of March 31, 2024 and December 31, 2023; 43,065,645 and 42,900,083 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	4	4
Additional paid-in capital	663,997	654,685
Accumulated other comprehensive loss	(331)	(129)
Accumulated deficit	(238,005)	(200,857)
Total Cullinan stockholders' equity	425,665	453,703
Noncontrolling interests	0	192
Total stockholders' equity	425,665	453,895
Total liabilities and stockholders' equity	$ 449,430	$ 484,182