Sionna Therapeutics, Inc. insider trading
SION$4.85-0.06 (-1.22% today)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-83.4%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- BBBruce Booth6.6256%
- PAPeter A. Thompson5.463%
- MCMichael Cloonan1.6929%
- ERElena Ridloff0.2943%
- CMCharlotte McKee0.284%
- JFJennifer Fitzpatrick0.1244%
- OAOrbimed Advisors LLCNot reported
- RCRA Capital Nexus Fund III, L.P.Not reported
- TGTPG GP A, LLCNot reported
- RCRa Capital Management, L.P.Not reported
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| SION | Ra Capital Management, L.P. | Open market sell$252K | -1.0% | $7.46 | $252K | Sep 17, 2026 | Sep 21, 2026 |
| SION | Ra Capital Management, L.P. | Open market sell$21.6M | -49.5% | $6.32 | $21.6M | Sep 17, 2026 | Sep 21, 2026 |
| SION | Peter A. Thompson | Open market sell$3.85M | -3.4% | $44.86 | $3.85M | Jul 7, 2026 | Jul 9, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$3.85M | -3.4% | $44.86 | $3.85M | Jul 7, 2026 | Jul 9, 2026 |
| SION | Peter A. Thompson | Open market sell$5.27M | -4.3% | $45.50 | $5.27M | Jun 30, 2026 | Jul 2, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$5.27M | -4.3% | $45.50 | $5.27M | Jun 30, 2026 | Jul 2, 2026 |
| SION | Peter A. Thompson | Open market sell$4.49K | 0.0% | $44.49 | $4.49K | May 27, 2026 | May 29, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$4.49K | 0.0% | $44.49 | $4.49K | May 27, 2026 | May 29, 2026 |
| SION | Peter A. Thompson | Open market sell$8.53M | -6.5% | $46.22 | $8.53M | May 11, 2026 | May 11, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$8.53M | -6.5% | $46.22 | $8.53M | May 11, 2026 | May 11, 2026 |
| SION | Peter A. Thompson | Open market sell$2.66M | -2.1% | $44.58 | $2.66M | May 8, 2026 | May 11, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$2.66M | -2.1% | $44.58 | $2.66M | May 8, 2026 | May 11, 2026 |
| SION | Peter A. Thompson | Open market sell$2.17M | -1.6% | $44.61 | $2.17M | May 7, 2026 | May 11, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$2.17M | -1.6% | $44.61 | $2.17M | May 7, 2026 | May 11, 2026 |
| SION | Peter A. Thompson | Open market sell$131K | -0.1% | $44.52 | $131K | Apr 18, 2026 | Apr 21, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$131K | -0.1% | $44.52 | $131K | Apr 18, 2026 | Apr 21, 2026 |
| SION | Peter A. Thompson | Open market sell$2.34M | -1.7% | $44.68 | $2.34M | Apr 17, 2026 | Apr 21, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$2.34M | -1.7% | $44.68 | $2.34M | Apr 17, 2026 | Apr 21, 2026 |
| SION | Peter A. Thompson | Open market sell$10.3M | -7.0% | $45.34 | $10.3M | Apr 16, 2026 | Apr 16, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$10.3M | -7.0% | $45.34 | $10.3M | Apr 16, 2026 | Apr 16, 2026 |
| SION | Peter A. Thompson | Open market sell$10.5M | -6.8% | $44.64 | $10.5M | Apr 15, 2026 | Apr 16, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$10.5M | -6.8% | $44.64 | $10.5M | Apr 15, 2026 | Apr 16, 2026 |
| SION | Peter A. Thompson | Open market sell$2.13M | -1.4% | $44.51 | $2.13M | Apr 14, 2026 | Apr 16, 2026 |
| SION | Orbimed Advisors LLC | Open market sell$2.13M | -1.4% | $44.51 | $2.13M | Apr 14, 2026 | Apr 16, 2026 |
| SION | Peter A. Thompson | Open market sell$1.3M | -0.8% | $44.58 | $1.3M | Feb 3, 2026 | Feb 4, 2026 |
| SION | OrbiMed Capital GP VIII LLC | Open market sell$1.3M | -0.8% | $44.58 | $1.3M | Feb 3, 2026 | Feb 4, 2026 |
| SION | Peter A. Thompson | Open market sell$84.2K | -0.1% | $44.57 | $84.2K | Feb 2, 2026 | Feb 4, 2026 |
| SION | OrbiMed Capital GP VIII LLC | Open market sell$84.2K | -0.1% | $44.57 | $84.2K | Feb 2, 2026 | Feb 4, 2026 |
| SION | Jon Winkelried | Open market sell$10M | -3.7% | $40.00 | $10M | Jan 22, 2026 | Jan 26, 2026 |
| SION | OrbiMed Capital GP VIII LLC | Open market sell$1.49M | -0.9% | $44.55 | $1.49M | Dec 24, 2025 | Dec 29, 2025 |
| SION | Peter A. Thompson | Open market sell$1.49M | -0.9% | $44.55 | $1.49M | Dec 24, 2025 | Dec 29, 2025 |
| SION | OrbiMed Capital GP VIII LLC | Open market sell$38.9K | 0.0% | $44.49 | $38.9K | Dec 19, 2025 | Dec 19, 2025 |
| SION | Peter A. Thompson | Open market sell$38.9K | 0.0% | $44.49 | $38.9K | Dec 19, 2025 | Dec 19, 2025 |
| SION | OrbiMed Capital GP VIII LLC | Open market sell$4.45K | 0.0% | $44.49 | $4.45K | Dec 18, 2025 | Dec 19, 2025 |
| SION | Peter A. Thompson | Open market sell$4.45K | 0.0% | $44.49 | $4.45K | Dec 18, 2025 | Dec 19, 2025 |
| SION | OrbiMed Capital GP VIII LLC | Open market sell$40.1K | 0.0% | $44.50 | $40.1K | Dec 17, 2025 | Dec 19, 2025 |
| SION | Peter A. Thompson | Open market sell$40.1K | 0.0% | $44.50 | $40.1K | Dec 17, 2025 | Dec 19, 2025 |
| SION | Orbimed Advisors LLC | Open market sell$71.2K | 0.0% | $44.49 | $71.2K | Nov 26, 2025 | Nov 26, 2025 |
| SION | Peter A. Thompson | Open market sell$71.2K | 0.0% | $44.49 | $71.2K | Nov 26, 2025 | Nov 26, 2025 |
| SION | Orbimed Advisors LLC | Open market sell$530K | -0.3% | $44.60 | $530K | Nov 25, 2025 | Nov 26, 2025 |
| SION | Peter A. Thompson | Open market sell$530K | -0.3% | $44.60 | $530K | Nov 25, 2025 | Nov 26, 2025 |
| SION | Orbimed Advisors LLC | Open market sell$4.21M | -2.6% | $44.54 | $4.21M | Nov 24, 2025 | Nov 26, 2025 |
| SION | Peter A. Thompson | Open market sell$4.21M | -2.6% | $44.54 | $4.21M | Nov 24, 2025 | Nov 26, 2025 |
| SION | Peter Kolchinsky | Open market sell$301K | -4.6% | $39.50 | $301K | Nov 21, 2025 | Nov 24, 2025 |
| SION | Peter Kolchinsky | Open market sell$254K | -0.3% | $39.50 | $254K | Nov 21, 2025 | Nov 24, 2025 |
| SION | Peter Kolchinsky | Open market sell$392K | -1.5% | $39.50 | $392K | Nov 21, 2025 | Nov 24, 2025 |
| SION | Peter Kolchinsky | Open market sell$47.8K | 0.0% | $39.50 | $47.8K | Nov 21, 2025 | Nov 24, 2025 |
| SION | Peter Kolchinsky | Open market sell$24.5K | -0.4% | $40.50 | $24.5K | Nov 20, 2025 | Nov 24, 2025 |
| SION | Peter Kolchinsky | Open market sell$20.7K | 0.0% | $40.50 | $20.7K | Nov 20, 2025 | Nov 24, 2025 |
| SION | Peter Kolchinsky | Open market sell$31.9K | -0.1% | $40.50 | $31.9K | Nov 20, 2025 | Nov 24, 2025 |