# Sionna Therapeutics (SION): value investors who own it

0 value investors held Sionna Therapeutics in their Q3 2026 13F. See who bought, sold and how ownership has changed by quarter.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Polen Capital Management | 0.0% | $0k | Sold out | 4 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-09-17 | RA CAPITAL MANAGEMENT, L.P. | Director | Sold | 3415011 | $21.6m |
| 2026-09-17 | RA CAPITAL MANAGEMENT, L.P. | Director | Sold | 33800 | $252k |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/sion). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.