SION
Sionna Therapeutics, Inc.
Latest Form 4:Sale$3.9MbyThompson Peter A. (Director) · filed Jul 9, 2026
Sionna Therapeutics, Inc. (SION) has 37 SEC Form 4 filings (163 transaction rows) in the rolling window, disclosed by 8 distinct insiders. Most recent filing: Jul 9, 2026.
The most active filer is Director Thompson Peter A. with 20 filings. Insiders have net sold $109.4M over the trailing 6 months.
- Industry:Biotechnology
- CEO:Michael Cloonan
- Employees:59
- HQ:Waltham, MA, US
- IPO:2025-02-07
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$171.7M
reported sales (SEC code S)
Unique Insiders
8
in the rolling window
Market Cap
$265.4M
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
| Director | Sale | 85,918 | $3.9M | Jul 9 | SEC ↗ | |
| Director | Sale | 85,918 | $3.9M | Jul 9 | SEC ↗ | |
Fitzpatrick JenniferFirst in 4 months | Chief Legal Officer | Sale | 10,250 | $447K | Jul 7 | SEC ↗ |
| Director | Sale | 115,844 | $5.3M | Jul 2 | SEC ↗ | |
| Director | Sale | 115,844 | $5.3M | Jul 2 | SEC ↗ | |
| Director | Sale | 101 | $4K | May 30 | SEC ↗ | |
| Director | Sale | 101 | $4K | May 30 | SEC ↗ | |
| Director | Sale | 48,546 | $2.2M | May 11 | SEC ↗ | |
| Director | Sale | 59,767 | $2.7M | May 11 | SEC ↗ | |
| Director | Sale | 184,639 | $8.5M | May 11 | SEC ↗ | |
| Director | Sale | 48,546 | $2.2M | May 11 | SEC ↗ | |
| Director | Sale | 59,767 | $2.7M | May 11 | SEC ↗ | |
| Director | Sale | 184,639 | $8.5M | May 11 | SEC ↗ | |
| Director | Sale | 52,397 | $2.3M | Apr 21 | SEC ↗ | |
| Director | Sale | 2,948 | $131K | Apr 21 | SEC ↗ | |
| Director | Sale | 52,397 | $2.3M | Apr 21 | SEC ↗ | |
| Director | Sale | 2,948 | $131K | Apr 21 | SEC ↗ | |
| Director | Sale | 47,814 | $2.1M | Apr 16 | SEC ↗ | |
| Director | Sale | 235,863 | $10.5M | Apr 16 | SEC ↗ | |
| Director | Sale | 226,906 | $10.3M | Apr 16 | SEC ↗ | |
| Director | Sale | 47,814 | $2.1M | Apr 16 | SEC ↗ | |
| Director | Sale | 235,863 | $10.5M | Apr 16 | SEC ↗ | |
| Director | Sale | 226,906 | $10.3M | Apr 16 | SEC ↗ | |
| Chief Legal Officer | Sale | 10,250 | $347K | Mar 6 | SEC ↗ | |
| Director | Sale | 1,890 | $84K | Feb 4 | SEC ↗ | |
| Director | Sale | 29,063 | $1.3M | Feb 4 | SEC ↗ | |
| Director | Sale | 1,890 | $84K | Feb 4 | SEC ↗ | |
| Director | Sale | 29,063 | $1.3M | Feb 4 | SEC ↗ | |
TPG GP A, LLCFirst filing | 10% Owner | Sale | 250,000 | $10.0M | Jan 26 | SEC ↗ |
| Director | Sale | 33,356 | $1.5M | Dec 29 | SEC ↗ | |
| Director | Sale | 33,356 | $1.5M | Dec 29 | SEC ↗ | |
| Director | Sale | 900 | $40K | Dec 19 | SEC ↗ | |
| Director | Sale | 100 | $4K | Dec 19 | SEC ↗ | |
| Director | Sale | 875 | $39K | Dec 19 | SEC ↗ | |
| Director | Sale | 900 | $40K | Dec 19 | SEC ↗ | |
| Director | Sale | 100 | $4K | Dec 19 | SEC ↗ | |
| Director | Sale | 875 | $39K | Dec 19 | SEC ↗ | |
Fitzpatrick JenniferFirst in 3 months | Chief Legal Officer | Sale | 10,250 | $415K | Dec 9 | SEC ↗ |
Thompson Peter A.First filing | Director | Sale | 94,583 | $4.2M | Nov 26 | SEC ↗ |
Thompson Peter A.First filing | Director | Sale | 11,890 | $530K | Nov 26 | SEC ↗ |
Thompson Peter A.First filing | Director | Sale | 1,600 | $71K | Nov 26 | SEC ↗ |
| Director | Sale | 94,583 | $4.2M | Nov 26 | SEC ↗ | |
| Director | Sale | 11,890 | $530K | Nov 26 | SEC ↗ | |
| Director | Sale | 1,600 | $71K | Nov 26 | SEC ↗ | |
| Director, 10% Owner | Sale | 5,133 | $206K | Nov 24 | SEC ↗ | |
| Director, 10% Owner | Sale | 25,183 | $995K | Nov 24 | SEC ↗ | |
| Director, 10% Owner | Sale | 81,987 | $3.3M | Nov 19 | SEC ↗ | |
| Director, 10% Owner | Sale | 6,922 | $274K | Nov 19 | SEC ↗ | |
| Director, 10% Owner | Sale | 47,442 | $1.9M | Nov 19 | SEC ↗ | |
| Director, 10% Owner | Sale | 311,000 | $12.3M | Oct 28 | SEC ↗ | |
| Director, 10% Owner | Sale | 62,610 | $2.5M | Oct 28 | SEC ↗ | |
| President & CEO | Sale | 99,800 | $3.6M | Oct 22 | SEC ↗ | |
| Insider | Sale | 88,878 | $3.0M | Oct 21 | SEC ↗ | |
| Insider | Sale | 169,260 | $5.5M | Oct 20 | SEC ↗ | |
| Insider | Sale | 61,124 | $2.0M | Oct 20 | SEC ↗ | |
| Insider | Sale | 55,985 | $1.8M | Oct 20 | SEC ↗ | |
| President & CEO | Sale | 14,775 | $460K | Oct 17 | SEC ↗ | |
| President & CEO | Sale | 10,425 | $328K | Oct 17 | SEC ↗ | |
| Insider | Sale | 20,238 | $607K | Oct 15 | SEC ↗ | |
| Insider | Sale | 58,232 | $1.8M | Oct 15 | SEC ↗ | |
| Insider | Sale | 606 | $18K | Oct 15 | SEC ↗ | |
| Insider | Sale | 115,856 | $3.5M | Oct 15 | SEC ↗ | |
| Director | Sale | 37,746 | $1.1M | Oct 7 | SEC ↗ | |
| Director | Sale | 11,800 | $353K | Oct 7 | SEC ↗ | |
Booth BruceFirst filing | Director | Sale | 66,105 | $2.0M | Oct 1 | SEC ↗ |
Booth BruceFirst filing | Director | Sale | 12,388 | $372K | Oct 1 | SEC ↗ |
Booth BruceFirst filing | Director | Sale | 200 | $6K | Oct 1 | SEC ↗ |
Cloonan MichaelFirst filing | President & CEO | Sale | 17,207 | $496K | Sep 30 | SEC ↗ |
Cloonan MichaelFirst filing | President & CEO | Sale | 7,793 | $231K | Sep 30 | SEC ↗ |
Fitzpatrick JenniferFirst filing | Chief Legal Officer | Sale | 10,250 | $237K | Sep 5 | SEC ↗ |
Ridloff ElenaFirst filing | CFO & Head of Corp. Dev. | Sale | 748 | $19K | Sep 3 | SEC ↗ |
Ridloff ElenaFirst filing | CFO & Head of Corp. Dev. | Sale | 8,836 | $222K | Sep 3 | SEC ↗ |
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Sionna Therapeutics, Inc. is in the Healthcare sector.