Sionna Therapeutics, Inc.
SION
10 insider filings · Latest: May 7, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Nov 18, 2025 | Nov 18 10:17 PM | RA Capital Nexus Fund, L.P. | Proposed Sale | 2,728 | $39.04 | $106.5K | — | View → |
| Nov 18, 2025 | Nov 18 10:09 PM | RA Capital Nexus Fund III, L.P. | Proposed Sale | 1,770 | $39.04 | $69.1K | — | View → |
| Nov 18, 2025 | Nov 18 9:58 PM | RA Capital Healthcare Fund LP | Proposed Sale | 332 | $39.04 | $13.0K | — | View → |
| Nov 17, 2025 | Nov 17 10:12 PM | BLACKWELL PARTNERS LLC - SERIES A | Proposed Sale | 24,772 | $39.93 | $989.1K | — | View → |
| Nov 17, 2025 | Nov 17 10:04 PM | RA Capital Nexus Fund, L.P. | Proposed Sale | 32,310 | $39.93 | $1.3M | — | View → |
| Nov 17, 2025 | Nov 17 9:56 PM | RA Capital Nexus Fund III, L.P. | Proposed Sale | 20,969 | $39.93 | $837.3K | — | View → |
| Nov 17, 2025 | Nov 17 9:46 PM | RA Capital Healthcare Fund LP | Proposed Sale | 3,936 | $39.93 | $157.2K | — | View → |
| Oct 28, 2025 | Oct 28 9:13 PM | RA Capital Nexus Fund III, L.P. | Proposed Sale | 17,118 | $39.45 | $675.3K | — | View → |
| Oct 28, 2025 | Oct 28 9:07 PM | RA Capital Healthcare Fund LP | Proposed Sale | 3,624 | $39.45 | $143.0K | — | View → |
| Oct 28, 2025 | Oct 28 9:05 PM | RA Capital Nexus Fund, L.P. | Proposed Sale | 31,392 | $39.45 | $1.2M | — | View → |
| Oct 28, 2025 | Oct 28 8:57 PM | BLACKWELL PARTNERS LLC - SERIES A | Proposed Sale | 10,476 | $39.45 | $413.3K | — | View → |
| Oct 24, 2025 | Oct 24 10:05 PM | RA Capital Nexus Fund, L.P. | Proposed Sale | 122,271 | $39.21 | $4.8M | — | View → |
| Oct 24, 2025 | Oct 24 10:00 PM | RA Capital Nexus Fund III, L.P. | Proposed Sale | 66,672 | $39.21 | $2.6M | — | View → |
| Oct 24, 2025 | Oct 24 9:53 PM | RA Capital Healthcare Fund LP | Proposed Sale | 14,116 | $39.21 | $553.5K | — | View → |
| Oct 24, 2025 | Oct 24 9:39 PM | BLACKWELL PARTNERS LLC - SERIES A | Proposed Sale | 107,941 | $39.21 | $4.2M | — | View → |
| Oct 21, 2025 | Oct 21 8:22 PM | Atlas Venture Opportunity Fund II, L.P. | Proposed Sale | 15,418 | $32.20 | $496.5K | — | View → |
| Oct 21, 2025 | Oct 21 8:21 PM | Atlas Venture Fund XI, LP | Proposed Sale | 73,460 | $32.20 | $2.4M | — | View → |
| Oct 21, 2025 | Oct 21 8:19 PM | MICHAEL CLOONAN | Proposed Sale | 99,800 | $32.20 | $3.2M | — | View → |
| Oct 20, 2025 | Oct 20 8:46 PM | Atlas Venture Fund XI, LP | Proposed Sale | 46,273 | $31.93 | $1.5M | — | View → |
| Oct 20, 2025 | Oct 20 8:46 PM | Atlas Venture Opportunity Fund II, L.P. | Proposed Sale | 9,712 | $31.93 | $310.1K | — | View → |
Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Mar 5, 2026 | Mar 6 11:56 PM | Jennifer FitzpatrickChief Legal Officer | Option Exercise | 10,250 | $6.11 | 50,935(D) | View → |