Michael Cloonan
President & CEO at Sionna Therapeutics Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 2 years
- Director since
- 2025
2 years of board service in total across 1 board, counting each seat separately. Longest: Sionna Therapeutics Inc., 1 year.
Chief executive roles
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 17, 2026 | Sionna Therapeutics Inc. | Grant or award | +109,025 | — | — |
| Sep 17, 2026 | Sionna Therapeutics Inc. | Grant or award | +109,025 | — | — |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Option exercise | +13,324 | $6.11 | $81,410 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Open-market sale | −13,324 | $34.44 | $458,879 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Option exercise | +30,049 | $6.11 | $183,599 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Open-market sale | −30,049 | $35.63 | $1,070,646 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Option exercise | +22,895 | $6.11 | $139,888 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Open-market sale | −22,895 | $36.60 | $837,957 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Option exercise | +33,532 | $6.11 | $204,881 |
| Oct 21, 2025 | Sionna Therapeutics Inc. | Open-market sale | −33,532 | $37.31 | $1,251,079 |
| Oct 16, 2025 | Sionna Therapeutics Inc. | Option exercise | +10,225 | $6.11 | $62,475 |
| Oct 16, 2025 | Sionna Therapeutics Inc. | Open-market sale | −10,225 | $31.46 | $321,679 |
| Oct 16, 2025 | Sionna Therapeutics Inc. | Option exercise | +200 | $6.11 | $1,222 |
| Oct 16, 2025 | Sionna Therapeutics Inc. | Open-market sale | −200 | $34.00 | $6,800 |
| Oct 15, 2025 | Sionna Therapeutics Inc. | Option exercise | +14,775 | $6.11 | $90,275 |
Questions about Michael Cloonan
What boards is Michael Cloonan on?
Michael Cloonan sits on the board of Sionna Therapeutics Inc.
What company is Michael Cloonan the CEO of?
Michael Cloonan has been President & CEO of Sionna Therapeutics Inc. since February 2025.
How long has Michael Cloonan served on boards?
Our records show at least 2 years of board service across 1 board, the earliest from 2025.
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