Health score, price, valuation, risk signals, and key metrics at a glance.
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.
Strongest: Balance Sheet & Red Flags (15/25); weakest: Profitability (4/25).
Today's multiple positioned against its own trailing range — a visual premium/discount check.
Currently below its 6-quarter median.
Data-driven signals worth keeping an eye on across the last 8 quarters
The company posted negative operating margins in recent quarters — core operations are unprofitable.
Free cash flow has been negative in 6 of the last 6 quarters — earnings are not translating to cash.
as of June 2026
Revenue, EBITDA, operating income, net income, EPS, and shares
Gross, EBITDA, operating, and net margin trends
P/E, P/S, P/B, EV/EBITDA, FCF yield, and earnings yield
Total assets, cash, debt, book value, and leverage
Operating cash flow, free cash flow, FCF margin, and earnings quality
The last 6 consecutive quarters had negative FCF — the company is burning cash and may need external funding.
Shares outstanding increased 69.8% — significant dilution, likely from stock compensation or capital raises.
