Company: SION
Filing Date: 2025-11-05
Form Type: 10-Q
Source: 0001628280-25-049251
Chunk: 311

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-11-05
Form: 10-Q
Item: Part I, Item 1
Chunk 311
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. All other securities had a contractual maturity of less than a year. There were no realized gains or losses during the three and nine months ended September 30, 2025, or 2024.

4. Fair Value Measurements 

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): September 30, 2025Total Level 1 Level 2 Level 3 AssetsCash equivalents:Money market funds$45,344 $45,344 $— $— Commercial paper4,987 — 4,987 — Marketable securities:U.S. Treasury securities187,599 187,599 — — Government agency securities43,879 — 43,879 — Commercial paper28,986 — 28,986 — Corporate debt13,705 — 13,705 — Total financial assets$324,500 $232,943 $91,557 $— December 31, 2024Total Level 1 Level 2 Level 3 AssetsCash equivalents:Money market funds$37,288 $37,288 $— $— Marketable securities:   U.S. Treasury securities70,679 70,679 — — Government agency securities36,415 — 36,415 — Corporate debt17,227 — 17,227 — Commercial paper5,934 — 5,934 — Total financial assets$167,543 $107,967 $59,576 $— During the three and nine months ended September 30, 2025, 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.

5. Property and Equipment, net 

Property and equipment, net consisted of the following (in thousands): September 30,2025December 31,2024Leasehold improvements$1,914 $1,854 Laboratory equipment1,574 1,461 Furniture & fixtures626 722 Total property and equipment4,114 4,037 Less: accumulated depreciation(1,970)(1,571)