SION · NASDAQ
Sionna Therapeutics (SION) Stock Price & Fundamentals
Sionna Therapeutics (SION) closed at $958.96 on Oct 9, 2026, up 0.80% from the previous close of $951.36.
Share price, past year
1Y +22.78%Monthly closing prices
| Date | Close |
|---|---|
| Oct 9, 2026 | $958.96 |
| Sep 30, 2026 | $931.57 |
| Aug 31, 2026 | $934.15 |
| Jul 31, 2026 | $918.44 |
| Jun 30, 2026 | $893.70 |
| May 29, 2026 | $846.70 |
| Apr 30, 2026 | $822.47 |
| Mar 31, 2026 | $823.82 |
| Feb 27, 2026 | $815.06 |
| Jan 30, 2026 | $903.66 |
| Dec 31, 2025 | $854.34 |
| Nov 28, 2025 | $834.16 |
| Oct 31, 2025 | $788.59 |
Key statistics
- Market cap
- $43.31B
- EPS (TTM)
- −$2.11
- Net income (TTM)
- −$97.38M
- Shares outstanding
- 45.2M
- 52-week range
- $770.75 – $958.96
Sionna Therapeutics's market cap is $43.31B, based on a share price of $958.96 and 45.2M shares outstanding as of Jun 30, 2026.
Financials
Sionna Therapeutics's SEC filings don't report revenue in the standard form Laurel reads, so its revenue history isn't shown yet.
Sionna Therapeutics reported a net loss of $75.27M in fiscal 2025.
Company profile
- Name
- Sionna Therapeutics, Inc.
- Ticker
- SION
- Exchange
- NASDAQ
- Industry (SEC SIC)
- Pharmaceutical Preparations
- Headquarters
- 21 Hickory Drive, Suite 500, Waltham, MA 02451
- Incorporated in
- DE
- Fiscal year ends
- December
- SEC CIK
- 0002036042
Recent SEC filings
- Sep 14, 2026
- Aug 10, 2026
- Aug 6, 2026
- Aug 6, 2026
- Jun 18, 2026
- May 12, 2026
- May 12, 2026
- Mar 2, 2026
Frequently asked questions
What is Sionna Therapeutics's stock price?
Sionna Therapeutics (SION) closed at $958.96 on Oct 9, 2026, up 0.80% from the previous close of $951.36.
What is Sionna Therapeutics's market cap?
Sionna Therapeutics's market cap is $43.31B, based on a share price of $958.96 and 45.2M shares outstanding as of Jun 30, 2026.
Does Sionna Therapeutics pay a dividend?
Sionna Therapeutics's recent filings report no dividends declared over the last four quarters.
Sources and methodology
Fundamentals come from Sionna Therapeutics, Inc.'s filings with the SEC (EDGAR XBRL company facts). Fourth-quarter figures that companies don't report separately are calculated as the fiscal year minus the first three quarters. Trailing twelve-month (TTM) figures sum the latest four quarters. Prices are generated sample data for development. Last updated Oct 9, 2026. Data sources and disclosures