Sionna Therapeutics, Inc.
For the period ended Dec 31, 2025. Filed Mar 2, 2026.
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FY2025 · Filed Mar 2, 2026
SION$3.70+3.6%Stored close · as of Nov 10, 2026
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Item 8. Consolidated Statements of Cash Flows
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)
| Year Ended December 31, | ||
|---|---|---|
| 2025 | 2024 | |
| Cash flows from operating activities: | ||
| Net loss | $(75,268) | $(61,688) |
| Adjustments to reconcile net loss to net cash used in operating activities: | ||
| Stock-based compensation expense | 12,066 | 3,708 |
| Non-cash operating lease expense | 1,962 | 1,962 |
| Amortization of discount on marketable securities | (3,052) | (3,001) |
| Non-cash expense related to IPR&D acquisition | — | 8,639 |
| Depreciation expense | 647 | 668 |
| Changes in operating assets and liabilities: | ||
| Prepaid expenses and other current assets | (2,082) | (2,760) |
| Accounts payable | (417) | 467 |
| Accrued expenses and other current liabilities | 1,975 | 1,080 |
| Operating lease liability | (2,128) | (1,897) |
| Other assets | — | 35 |
| Net cash used in operating activities | (66,297) | (52,787) |
| Cash flows from investing activities: | ||
| Purchases of property and equipment | (377) | (27) |
| Purchases of marketable securities | (325,025) | (182,841) |
| Maturities of marketable securities | 206,653 | 55,955 |
| Net cash used in investing activities | (118,749) | (126,913) |
| Cash flows from financing activities: | ||
| Proceeds from initial public offering, net of underwriter discounts, commissions and offering costs paid during the period | 202,071 | — |
| Proceeds from issuance of Series C convertible preferred stock, net of issuance costs | — | 181,328 |
| Payment of deferred offering costs | — | (2,502) |
| Exercise of common stock options | 3,639 | 141 |
| Net cash provided by financing activities | 205,710 | 178,967 |
| Net increase (decrease) in cash, cash equivalents and restricted cash | 20,664 | (733) |
| Cash, cash equivalents and restricted cash at beginning of period | 38,750 | 39,483 |
| Cash, cash equivalents and restricted cash at end of period | $59,414 | $38,750 |
| Supplemental disclosure of non-cash investing and financing activities: | ||
| Conversion of convertible preferred stock into common stock upon closing of initial public offering | $330,368 | $— |
| Offering costs transferred to additional paid in capital | 4,265 | — |
| Deferred offering costs in accrued expenses | — | 492 |
| Reconciliation of cash, cash equivalents and restricted cash: | ||
| Cash and cash equivalents | $58,451 | $37,788 |
| Restricted cash | 963 | 962 |
| Total cash, cash equivalents, and restricted cash | $59,414 | $38,750 |
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