CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 102,085	$ 98,434
Short-term investments	475,993	368,633
Prepaid expenses and other current assets	13,961	13,124
Total current assets	592,039	480,191
Property and equipment, net	760	989
Operating lease right-of-use assets	2,019	2,543
Other assets	460	459
Long-term investments	57,976	0
Total assets	653,254	484,182
Current liabilities:
Accounts payable	2,115	2,493
Accrued expenses and other current liabilities	20,831	24,204
Operating lease liabilities, current	1,258	1,440
Total current liabilities	24,204	28,137
Long-term liabilities:
Operating lease liabilities, net of current portion	1,188	2,150
Total liabilities	25,392	30,287
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of September 30, 2024 and December 31, 2023; 647,500 shares issued and outstanding as of September 30, 2024 and December 31, 2023.	0	0
Common stock, $0.0001 par value, 150,000,000 shares authorized as of September 30, 2024 and December 31, 2023; 58,141,130 and 42,900,083 shares issued and outstanding as of September 30, 2024 and December 31, 2023, respectively	6	4
Additional paid-in capital	947,479	654,685
Accumulated other comprehensive income (loss)	970	(129)
Accumulated deficit	(320,593)	(200,857)
Total Cullinan stockholders' equity	627,862	453,703
Noncontrolling interests	0	192
Total stockholders' equity	627,862	453,895
Total liabilities and stockholders' equity	$ 653,254	$ 484,182