Company: SION
Filing Date: 2025-11-05
Form Type: 10-Q
Source: 0001628280-25-049251
Chunk: 305

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-11-05
Form: 10-Q
Item: Part I, Item 1
Chunk 305
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44 $551,838 $183 $(215,636)$336,429 Exercise of common stock options————————331,189—1,974——1,974 Stock-based compensation expense——————————3,306——3,306 Unrealized gain on marketable securities———————————237 —237 Net loss————————————(20,278)(20,278)Balance at September 30, 2025—$— —$— —$— —$— 44,463,527$44 $557,118 $420 $(235,914)$321,668 

The accompanying notes are an integral part of these condensed consolidated financial statements. 

F-5

SIONNA THERAPEUTICS, INC. 

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS 

(in thousands) 

(Unaudited)Nine Months EndedSeptember 30,20252024Cash flows from operating activities:Net loss$(54,828)$(45,840)Adjustments to reconcile net loss to net cash used in operating activities:Stock-based compensation expense8,240 2,644 Non-cash operating lease expense1,471 1,472 Amortization of discount on marketable securities(2,699)(2,211)Non-cash expense related to IPR&D acquisition— 8,639 Depreciation expense495 501 Changes in operating assets and liabilities:Prepaid expenses and other current assets(543)(2,177)Accounts payable295 (615)Accrued expenses and other current liabilities(517)(2,094)Operating lease liabilities(1,585)(1,369)Other assets— 44 Net cash used in operating activities(49,671)(41,006)Cash flows from investing activities:Purchases of property and equipment(173)— Purchases of marketable securities(282,147)(175,641)Maturities of marketable securities140,983 33,500 Net cash used in investing activities(141,337)(142,141)Cash flows from financing activities:Proceeds from initial public offering, net of underwriter discounts, commissions and offering costs paid during the period202,071 — Proceeds from issuance of Series C convertible preferred stock, net of issuance costs— 181,328 Payment of deferred offering costs— (1,069)Exercise of common stock options1,980 116 Net cash provided by financing