Fair Value Measurements

3 Months Ended

Mar. 31, 2026

The following tables present information about the Company’s financial instruments that are measured at fair value on a recurring basis and indicates the fair value hierarchy of the inputs the Company utilized to determine such fair value (in thousands):


	March 31, 2026
	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	62,823	$	62,823	$	—	$	—

Marketable securities:
U.S. Treasury securities	179,147		179,147		—		—
Commercial paper	24,607		—		24,607		—
Government agency securities	17,037		—		17,037		—
Corporate debt	5,816		—		5,816		—
Total financial assets	$	289,430	$	241,970	$	47,460	$	—


	December 31, 2025
	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	51,962	$	51,962	$	—	$	—
Commercial paper	5,988		—		5,988		—
Marketable securities:
U.S. Treasury securities	192,065		192,065		—		—
Commercial paper	24,396		—		24,396		—
Government agency securities	23,575		—		23,575		—
Corporate debt	11,815		—		11,815		—
Total financial assets	$	309,801	$	244,027	$	65,774	$	—

During the three months ended March 31, 2026, there were no transfers or reclassifications between fair value measurement levels of assets or liabilities. The carrying values of prepaid expenses and other current assets, accounts payable and accrued expenses approximate their fair values due to the short-term nature of these assets and liabilities.

- Definition

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.

+ References

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+ Details

Sionna Therapeutics, Inc. 10-Q