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Fair Value Measurements

11 Months Ended

Dec. 31, 2024

Fair Value Measurements [Abstract]

Fair Value Measurements

4. Fair Value Measurements

The following tables present the Company’s fair value hierarchy for financial assets measured as of December 31, 2024 (in thousands):

		December 31, 2024
		Level 1				Level 2				Level 3				Total
Cash equivalents
Money market funds		$	6,350			$	—			$	—			$	6,350
U.S. treasury securities			—				19,660				—				19,660
U.S. government agency securities			—				3,988				—				3,988
Commercial papers			—				22,177				—				22,177
Total cash equivalents			6,350				45,825				—				52,175
Marketable securities
Marketable securities, current
U.S. treasury securities			—				190,792				—				190,792
U.S. government agency securities			—				12,966				—				12,966
Commercial papers			—				34,811				—				34,811
Corporate debt securities			—				75,504				—				75,504
Total marketable securities, current			—				314,073				—				314,073
Marketable securities, long-term
U.S. treasury securities			—				13,607				—				13,607
U.S. government agency securities			—				4,462				—				4,462
Total marketable securities, long-term			—				18,069				—				18,069
Total cash equivalents and marketable securities		$	6,350			$	377,967			$	—			$	384,317

There were no transfers in or out of Level 3 during the period from February 6, 2024 (inception) to December 31, 2024.

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The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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