CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 51,882	$ 45,157
Marketable securities	301,696	143,555
Collaboration receivable	5,025	0
Prepaid expenses and other current assets	24,440	21,163
Total current assets	383,043	209,875
Property and equipment, net	11,042	7,681
Restricted cash	3,950	3,950
Right-of-use assets, operating leases	84,017	25,340
Other non-current assets	2,981	5,210
Total assets	485,033	252,056
Current liabilities:
Accounts payable	752	5,990
Accrued expenses and other current liabilities	9,599	7,576
Operating lease obligations, current portion	6,642	8,406
Deferred revenue, current portion	148,440	0
Total current liabilities	165,433	21,972
Operating lease obligations, net of current portion	62,431	17,530
Deferred revenue, net of current portion	10,506	0
Total liabilities	238,370	39,502
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, par value $0.0001; 150,000,000 shares authorized; 33,361,365 shares issued and 33,340,216 shares outstanding as of September 30, 2023 and 31,448,508 shares issued and 31,394,767 shares outstanding as of December 31, 2022	3	3
Additional paid‑in capital	432,582	402,893
Accumulated other comprehensive loss	(496)	(2,057)
Accumulated deficit	(185,426)	(188,285)
Total stockholders’ equity	246,663	212,554
Total liabilities and stockholders’ equity	$ 485,033	$ 252,056