$SION insider trading
Over the last 12 months, Sionna Therapeutics insiders reported no purchases and 35 sales totaling $171.2M across SEC Form 4 filings. 89% of those filings were made under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $171.2M 35 events
- Events · 12m
- 35 Form 4 filings, grouped
- Insiders · 12m
- 7 distinct reporters
- 10b5-1 share
- 89% of events, not dollars
All insider trades
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Jul 7, 2026 | Thompson Peter A.D | ▼ Sale | 85,918 | $44.86 | $3.9M | -3.4% | plan · indirect |
| Jul 7, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 85,918 | $44.86 | $3.9M | -3.4% | plan · indirect |
| Jul 6, 2026 | Fitzpatrick JenniferChief Legal Officer · O | ▼ Sale | 10,250 | $43.6 | $447K | -100% | plan |
| Jun 30, 2026 | Thompson Peter A.D | ▼ Sale | 115,844 | $45.5 | $5.3M | -4.3% | plan · indirect |
| Jun 30, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 115,844 | $45.5 | $5.3M | -4.3% | plan · indirect |
| May 27, 2026 | Thompson Peter A.D | ▼ Sale | 101 | $44.49 | $4K | — | plan · indirect |
| May 27, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 101 | $44.49 | $4K | — | plan · indirect |
| May 11, 2026 | Thompson Peter A.D | ▼ Sale | 292,952 | $45.62 | $13.4M | -9.9% | plan · 3 tranches · indirect |
| May 11, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 292,952 | $45.62 | $13.4M | -9.9% | plan · 3 tranches · indirect |
| Apr 18, 2026 | Thompson Peter A.D | ▼ Sale | 55,345 | $44.67 | $2.5M | -1.8% | plan · 2 tranches · indirect |
| Apr 18, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 55,345 | $44.67 | $2.5M | -1.8% | plan · 2 tranches · indirect |
| Apr 16, 2026 | Thompson Peter A.D | ▼ Sale | 510,583 | $44.94 | $22.9M | -14.5% | plan · 3 tranches · indirect |
| Apr 16, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 510,583 | $44.94 | $22.9M | -14.5% | plan · 3 tranches · indirect |
| Mar 5, 2026 | Fitzpatrick JenniferChief Legal Officer · O | ▼ Sale | 10,250 | $33.86 | $347K | -100% | plan |
| Feb 3, 2026 | Thompson Peter A.D | ▼ Sale | 30,953 | $44.58 | $1.4M | -0.9% | plan · 2 tranches · indirect |
| Feb 3, 2026 | ORBIMED ADVISORS LLCD | ▼ Sale | 30,953 | $44.58 | $1.4M | -0.9% | plan · 2 tranches · indirect |
| Jan 22, 2026 | TPG GP A, LLC10% | ▼ Sale | 250,000 | $40 | $10.0M | -3.7% | indirect |
| Dec 24, 2025 | ORBIMED ADVISORS LLCD | ▼ Sale | 33,356 | $44.55 | $1.5M | -0.9% | plan · indirect |
| Dec 24, 2025 | Thompson Peter A.D | ▼ Sale | 33,356 | $44.55 | $1.5M | -0.9% | plan · indirect |
| Dec 19, 2025 | ORBIMED ADVISORS LLCD | ▼ Sale | 1,875 | $44.49 | $83K | -0.1% | plan · 3 tranches · indirect |
| Dec 19, 2025 | Thompson Peter A.D | ▼ Sale | 1,875 | $44.49 | $83K | -0.1% | plan · 3 tranches · indirect |
| Dec 5, 2025 | Fitzpatrick JenniferChief Legal Officer · O | ▼ Sale | 10,250 | $40.52 | $415K | -100% | plan |
| Nov 26, 2025 | ORBIMED ADVISORS LLCD | ▼ Sale | 108,073 | $44.55 | $4.8M | -2.9% | plan · 3 tranches · indirect |
| Nov 26, 2025 | Thompson Peter A.D | ▼ Sale | 108,073 | $44.55 | $4.8M | -2.9% | plan · 3 tranches · indirect |
| Nov 21, 2025 | RA CAPITAL MANAGEMENT, L.P.D·10% | ▼ Sale | 30,316 | $39.61 | $1.2M | -16% | 12 tranches · indirect |
| Nov 19, 2025 | RA CAPITAL MANAGEMENT, L.P.D·10% | ▼ Sale | 136,351 | $40.34 | $5.5M | -44.8% | 24 tranches · indirect |
| Oct 28, 2025 | RA CAPITAL MANAGEMENT, L.P.D·10% | ▼ Sale | 373,610 | $39.51 | $14.8M | -64.1% | 8 tranches · indirect |
| Oct 21, 2025 | Cloonan MichaelPresident & CEO · O·D | ▼ Sale | 99,800 | $36.26 | $3.6M | -15.4% | plan · 4 tranches |
| Oct 21, 2025 | Booth BruceD | ▼ Sale | 88,878 | $34.22 | $3.0M | -11.5% | plan · 10 tranches · indirect |
| Oct 20, 2025 | Booth BruceD | ▼ Sale | 286,369 | $32.3 | $9.3M | -29% | plan · 18 tranches · indirect |
| Oct 16, 2025 | Cloonan MichaelPresident & CEO · O·D | ▼ Sale | 25,200 | $31.28 | $788K | -4.4% | plan · 3 tranches |
| Oct 15, 2025 | Booth BruceD | ▼ Sale | 194,932 | $30.47 | $5.9M | -20.6% | plan · 12 tranches · indirect |
| Oct 6, 2025 | Booth BruceD | ▼ Sale | 49,546 | $29.99 | $1.5M | -5.9% | plan · 4 tranches · indirect |
| Oct 1, 2025 | Booth BruceD | ▼ Sale | 78,693 | $30.08 | $2.4M | -9% | plan · 6 tranches · indirect |
| Sep 29, 2025 | Cloonan MichaelPresident & CEO · O·D | ▼ Sale | 25,000 | $29.11 | $728K | -4.4% | plan · 2 tranches |
| Sep 4, 2025 | Fitzpatrick JenniferChief Legal Officer · O | ▼ Sale | 10,250 | $23.12 | $237K | -100% | plan |
| Sep 2, 2025 | Ridloff ElenaCFO & Head of Corp. Dev. · O | ▼ Sale | 9,584 | $25.09 | $240K | -19.9% | plan · 2 tranches |
| Aug 28, 2025 | Ridloff ElenaCFO & Head of Corp. Dev. · O | ▼ Sale | 23,416 | $25.7 | $602K | -32.7% | plan · 3 tranches |
| Aug 27, 2025 | Cloonan MichaelPresident & CEO · O·D | ▼ Sale | 25,000 | $24.97 | $624K | -4.4% | plan · 2 tranches |
| Aug 20, 2025 | Cloonan MichaelPresident & CEO · O·D | ▼ Sale | 25,000 | $22.75 | $569K | -4.4% | plan |
| Aug 20, 2025 | Ridloff ElenaCFO & Head of Corp. Dev. · O | ▼ Sale | 52,000 | $21.62 | $1.1M | -42.1% | plan · 2 tranches |
Every $SION filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Sionna Therapeutics filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $SION feed.