Sionna Therapeutics, Inc. (SION) Insider Trading -- Recent Executive & Director Transactions
17 insiders reported 439 Form 4 transactions for Sionna Therapeutics, Inc. (SION) over the past 18 months (most recent 2026-09-21). Recent activity: RA Capital Healthcare Fund LP (Director) Sell 3.4M shares, RA CAPITAL MANAGEMENT, L.P. (Director) Sell 3.4M shares, Kolchinsky Peter (Director) Sell 3.4M shares, Shah Rajeev M. (Director) Sell 3.4M shares, RA Capital Nexus Fund, L.P. (Director) Sell 3.4M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-21 | RA Capital Healthcare Fund LP | Director | Sell | 3.4M | $21.6M |
| 2026-09-21 | RA CAPITAL MANAGEMENT, L.P. | Director | Sell | 3.4M | $21.6M |
| 2026-09-21 | Kolchinsky Peter | Director | Sell | 3.4M | $21.6M |
| 2026-09-21 | Shah Rajeev M. | Director | Sell | 3.4M | $21.6M |
| 2026-09-21 | RA Capital Nexus Fund, L.P. | Director | Sell | 3.4M | $21.6M |
| 2026-09-21 | RA Capital Nexus Fund III, L.P. | Director | Sell | 3.4M | $21.6M |
| 2026-09-21 | RA Capital Healthcare Fund LP | Director | Sell | 33,800 | $252,148 |
| 2026-09-21 | RA CAPITAL MANAGEMENT, L.P. | Director | Sell | 33,800 | $252,148 |
| 2026-09-21 | Kolchinsky Peter | Director | Sell | 33,800 | $252,148 |
| 2026-09-21 | Shah Rajeev M. | Director | Sell | 33,800 | $252,148 |
| 2026-09-21 | RA Capital Nexus Fund, L.P. | Director | Sell | 33,800 | $252,148 |
| 2026-09-21 | RA Capital Nexus Fund III, L.P. | Director | Sell | 33,800 | $252,148 |
| 2026-09-18 | Cloonan Michael | President & CEO | Buy | 109,025 | $0 |
| 2026-09-18 | Ridloff Elena | CFO and CBO | Buy | 47,269 | $0 |
| 2026-09-18 | McKee Charlotte | CMO and Head of R&D | Buy | 50,000 | $0 |
| 2026-09-18 | Fitzpatrick Jennifer | CLO and Head of Program Mgmt. | Buy | 28,133 | $0 |
| 2026-09-18 | Cloonan Michael | President & CEO | Buy | 109,025 | $0 |
| 2026-09-18 | Ridloff Elena | CFO and CBO | Buy | 47,268 | $0 |
| 2026-09-18 | McKee Charlotte | CMO and Head of R&D | Buy | 50,000 | $0 |
| 2026-09-18 | Fitzpatrick Jennifer | CLO and Head of Program Mgmt. | Buy | 28,132 | $0 |
| 2026-07-09 | ORBIMED ADVISORS LLC | Director | Sell | 85,918 | $3.9M |
| 2026-07-09 | Thompson Peter A. | Director | Sell | 85,918 | $3.9M |
| 2026-07-09 | OrbiMed Capital GP VIII LLC | Director | Sell | 85,918 | $3.9M |
| 2026-07-07 | Fitzpatrick Jennifer | Chief Legal Officer | Buy | 10,250 | $62,628 |
| 2026-07-07 | Fitzpatrick Jennifer | Chief Legal Officer | Sell | 10,250 | $446,862 |
Source: SEC Form 4 filings · as of 2026-09-21