SION NASDAQ
Credit Risk of going bust: higher than 96% of companies Debt: 4.6% of company value Bonds: none of note held by US funds details ▾
If the stock fell to about $0.07 (down 98%), Sionna Therapeutics, Inc. would be worth roughly what it owes.
Total debt $8.1M against a stock market value of $166.6M.
Distance to default 0.24 (Merton model): prices to 2026-10-26, balance sheet 2026-06-30, debt counted $4.0M (short-term plus half of long-term), stock volatility 255.6%; Altman Z'' 14.89. A ranking and a back-test, not a forecast.
US fund filings (SEC N-PORT) show under $25M of this company's bonds, so there is no bond page. Its debt may be bank loans or privately placed. How these are computed.
Waltham, MA 02451
US
Sionna Therapeutics, Inc., a clinical-stage biopharmaceutical company, researches and develops medicines for the treatment of cystic fibrosis (CF). It develops galicaftor (SION-2222), a transmembrane domain 1 (TMD1)-directed cystic fibrosis transmembrane conductance regulator (CFTR) that has completed Phase 2 trial; navocaftor (SION-3067), a potentiator that has completed Phase 2 trial; SION-109, an intracellular loop 4 directed CFTR corrector that has completed Phase 1 trial; SION-2851, a TMD1-directed CFTR corrector that has completed Phase 1 trial; SION-451, which is nucleotide-binding domain 1 stabilizer in Phase 1 trial; and SION-719, which is nucleotide-binding domain 1 stabilizer in Phase 2a proof-of-concept trial. The company was formerly known as Sling Therapeutics, Inc. and changed its name to Sionna Therapeutics, Inc. in July 2021. Sionna Therapeutics, Inc. was incorporated in 2019 and is headquartered in Waltham, Massachusetts.
Recent Insider Trades
| Name | Type | Shares | Price | Date |
|---|---|---|---|---|
| RA CAPITAL MANAGEMEN | S-Sale | 3,415,011 | $6.32 | 2026-09-17 |
| RA CAPITAL MANAGEMEN | S-Sale | 33,800 | $7.46 | 2026-09-17 |
| Ridloff Elena | A-Award | 47,269 | — | 2026-09-17 |
| Ridloff Elena | A-Award | 47,268 | — | 2026-09-17 |
| Ridloff Elena | A-Award | 165,440 | $7.18 | 2026-09-17 |