Michael Cloonan
CIK: 0001704336
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (31 total)
- Sep 17, 2026SION
Sionna Therapeutics, Inc.
Disposition(D)DirectNon-Qualified Stock Option (right to buy)
436.1K shares- - Sep 17, 2026SION
Sionna Therapeutics, Inc.
Award(A)Direct109K shares- - Sep 17, 2026SION
Sionna Therapeutics, Inc.
Award(A)Direct109K shares- - Jan 2, 2026SION
Sionna Therapeutics, Inc.
Award(A)DirectNon-Qualified Stock Option (right to buy)
436.1K shares- - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct30K shares at avg. $35.63$1.1M - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct22.9K shares at avg. $6.11$140K - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct22.9K shares at avg. $36.60$838K - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct33.5K shares at avg. $6.11$205K - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct33.5K shares at avg. $37.31$1.3M - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct30K shares at avg. $6.11$184K - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct13.3K shares at avg. $6.11$81K - Oct 21, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct13.3K shares at avg. $34.44$459K - Oct 16, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct10.2K shares at avg. $31.46$322K - Oct 16, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct200 shares at avg. $6.11$1K - Oct 16, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct200 shares at avg. $34.00$7K - Oct 16, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct10.2K shares at avg. $6.11$62K - Oct 15, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct14.8K shares at avg. $6.11$90K - Oct 15, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct14.8K shares at avg. $31.11$460K - Sep 29, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct7.8K shares at avg. $29.70$231K - Sep 29, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct7.8K shares at avg. $6.11$48K - Sep 26, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct17.2K shares at avg. $6.11$105K - Sep 26, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct17.2K shares at avg. $28.85$496K - Aug 27, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct7.4K shares at avg. $25.01$186K - Aug 27, 2025SION
Sionna Therapeutics, Inc.
Exercise(M)Direct7.4K shares at avg. $6.11$45K - Aug 26, 2025SION
Sionna Therapeutics, Inc.
Sale(S)Direct17.6K shares at avg. $24.96$439K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 17, 2026 |  SION Sionna Therapeutics, Inc. | Disposition(D) Non-Qualified Stock Option (right to buy) | 436,100 | - | - | Direct |
| Sep 17, 2026 | SION Sionna Therapeutics, Inc. | Award(A) | 109,025 | - | $0 | Direct |
| Sep 17, 2026 | SION Sionna Therapeutics, Inc. | Award(A) | 109,025 | - | $0 | Direct |
| Jan 2, 2026 | SION Sionna Therapeutics, Inc. | Award(A) Non-Qualified Stock Option (right to buy) | 436,100 | - | - | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 30,049 | $35.63 | $1,070,646 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 22,895 | $6.11 | $139,888 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 22,895 | $36.60 | $837,957 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 33,532 | $6.11 | $204,881 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 33,532 | $37.31 | $1,251,079 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 30,049 | $6.11 | $183,599 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 13,324 | $6.11 | $81,410 | Direct |
| Oct 21, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 13,324 | $34.44 | $458,879 | Direct |
| Oct 16, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 10,225 | $31.46 | $321,691 | Direct |
| Oct 16, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 200 | $6.11 | $1,222 | Direct |
| Oct 16, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 200 | $34.00 | $6,800 | Direct |
| Oct 16, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 10,225 | $6.11 | $62,475 | Direct |
| Oct 15, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 14,775 | $6.11 | $90,275 | Direct |
| Oct 15, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 14,775 | $31.11 | $459,662 | Direct |
| Sep 29, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 7,793 | $29.70 | $231,451 | Direct |
| Sep 29, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 7,793 | $6.11 | $47,615 | Direct |
| Sep 26, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 17,207 | $6.11 | $105,135 | Direct |
| Sep 26, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 17,207 | $28.85 | $496,346 | Direct |
| Aug 27, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 7,426 | $25.01 | $185,714 | Direct |
| Aug 27, 2025 | SION Sionna Therapeutics, Inc. | Exercise(M) | 7,426 | $6.11 | $45,373 | Direct |
| Aug 26, 2025 | SION Sionna Therapeutics, Inc. | Sale(S) | 17,574 | $24.96 | $438,647 | Direct |
1-25 of 31 transactions
About Cloonan Michael
Cloonan Michael (SEC CIK 0001704336) files insider reports with the SEC as President & CEO of Sionna Therapeutics, Inc. (SION) and Director of bluebird bio, Inc. (BLUE).
Signal8 holds 11 ownership filings by Cloonan Michael (1 Form 3, 10 Form 4), filed between Oct 2, 2024 and Sep 18, 2026. Those filings report 31 transactions, from Sep 30, 2024 to Sep 17, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Cloonan Michael's filings is in WALTHAM, MA.
Recent filings by Cloonan Michael
- Sep 17, 2026: Disposition to issuer transaction of SION derivative securities (Form 4, code D).
- Sep 17, 2026: Grants or awards of SION shares (2 lines, Form 4, code A).
- Jan 2, 2026: Grant or award of SION derivative securities (Form 4, code A).
- Oct 21, 2025: Open-market sale of SION shares (Form 4, code S).
- Oct 21, 2025: Option exercise of SION shares (Form 4, code M).
Other insiders filing for Sionna Therapeutics, Inc. (SION)
- RA CAPITAL MANAGEMENT, L.P., Director
- Ridloff Elena, CFO and CBO
- McKee Charlotte, CMO and Head of R&D
- Fitzpatrick Jennifer, CLO and Head of Program Mgmt.
- Thompson Peter A., Director
- ORBIMED ADVISORS LLC, Director