CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating activities:
Net loss	$ 109,195	$ (67,485)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on sale of Cullinan Pearl	(276,785)	0
Equity-based compensation expense	27,957	24,375
Amortization/Accretion on Marketable Securities	1,294	3,098
Non cash contributions from noncontrolling interests	374	67
Realized loss on marketable securities	109	0
Depreciation and amortization	93	53
Gain on disposal of fixed assets	(77)	0
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,130)	(3,269)
Accounts payable	(509)	(4,835)
Accrued expenses and other liabilities	8,533	4,563
Income tax payable	4,282	0
Net cash used in operating activities	(126,664)	(43,433)
Investing activities:
Purchase of Marketable securities	(377,916)	(525,813)
Sales and maturities of marketable securities	352,933	192,038
Sale of Cullinan Pearl, net of cash transferred	275,000	0
Purchases of property and equipment	(1,133)	0
Proceeds from sale of property and equipment	91	0
Net cash used in investing activities	248,975	(333,775)
Financing activities:
Acquisition of noncontrolling interests	(33,281)	0
Net issuance of common stock under equity-based compensation plans	6,020	3,281
Issuance of convertible notes	2,375	0
Repayment of convertible note	(2,200)	0
Contributions from noncontrolling interests	1,153	923
Proceeds from initial public offering	0	267,268
Payment of deferred offering costs	0	(2,688)
Net cash provided by financing activities	(25,933)	268,784
Net decrease in cash and cash equivalents	96,378	(108,424)
Cash and cash equivalents at beginning of year	59,774	168,198
Cash and cash equivalents at end of year	156,152	59,774
Noncash financing activities
Deferred offering costs paid in the prior year	0	65
Purchases of property and equipment	71	0
Cash paid for income taxes	37,801	0
Cash paid for interest	$ 32	$ 0