Stock overview
Sionna Therapeutics Inc.
Explore the company, reported ownership, price history, and available source evidence.
SIONNA THERAPEUTICS INC (SION) is a healthcare or biotechnology equity security tracked from 13F filings.
- Last close
- $5.23
- · SION
- Tracked holders
- 3 funds
- Latest available 13F per fund
SION · USD
Price
$5.23
-$19.77
(-79.08%)
over selected range
Close · Sep 25, 2026
Market open
410 stored daily closes
$5.23
Sep 25, 2026
- Range low
- $4.50
- Range high
- $51.04
- Observations
- 410
- Session date
- Sep 25, 2026
Feb 7, 2025–Sep 25, 2026. Regular market hours only. Historical prices are unadjusted; splits and other corporate actions can affect comparisons.
Investor Popularity
Rows are narrowed by movement, fund type, and position size.
| Fund | Move | Value | Weight |
|---|---|---|---|
| Viking Global Investors largest tracked holder Q2 2026 · filed Aug 14, 2026 · SEC filing | — | $140,556,012 | 0.4% |
| Baker Bros. Advisors position history Q2 2026 · filed Aug 14, 2026 · SEC filing | — | $17,596,000 | 0.09% |
| Tudor Investment Corp position history Q2 2026 · filed Aug 14, 2026 · SEC filing | Newly reported 26'Q2 | $993,074 | 0% |
SEC Forms 4/5
Insiders
Financials
Official-source analysis
AI Earnings Report
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