RA Capital Healthcare Fund LP's Form 4 filing
Sionna Therapeutics, Inc. (SION) · filed Sep 21, 2026
- Accession no.
- 0001231919-26-001201
- Filed
- Sep 21, 2026, 6:56 PM ET
- Trade date
- Sep 17, 2026
- Filing delay
- 4 days
- Rule 10b5-1 plan
- Not checked
This filing lists 2 non-derivative transactions. Open-market sales total $21.8M. It was filed 4 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| RA Capital Healthcare Fund LPCIK 0001315082 | Director |
| Ra Capital Management, L.P.CIK 0001346824 | Director, 10% Owner |
| Kolchinsky PeterCIK 0001384859 | Director, 10% Owner |
| Shah Rajeev M.CIK 0001619841 | Director, 10% Owner |
| RA Capital Nexus Fund, L.P.CIK 0001780117 | Director |
| RA Capital Nexus Fund III, L.P.CIK 0001883840 | Director |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 17, 2026 | Common Stock | SSaleDisposed | −3,415,011 | $6.32 | −$21,582,869.52 | 3,482,612 | Indirect | |
| Sep 17, 2026 | Common Stock | SSaleDisposed | −33,800 | $7.46F3 | −$252,148 | 3,448,812 | Indirect |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F3
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.30 to $7.68 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
Remarks
Dr. Joshua Resnick, a Partner of the Adviser, serves on the Issuer's board of directors.