SION Sionna Therapeutics, Inc.
Sionna Therapeutics, Inc. (SION) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 46% planned / 54% discretionary
Largest single sale: $21.6M.
Where they traded
No open-market insider purchase on record.
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| 2 fills | Sell | 3,448,811 | $6.33 | $21.8M | 3,482,612 −49.8% of holding | ||
| Sell 10b5-1 | 85,918 | $44.86 | $3.9M | 2,469,959 −3.4% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 85,918 | $44.86 | $3.9M | 2,469,959 −3.4% of holding | |
| Fitzpatrick Jennifer | Chief Legal Officer | Sell 10b5-1 | 10,250 | $43.60 | $446.9K | None left | |
| Sell 10b5-1 | 115,844 | $45.50 | $5.3M | 2,555,877 −4.3% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 115,844 | $45.50 | $5.3M | 2,555,877 −4.3% of holding | |
| Sell 10b5-1 | 101 | $44.49 | $4.5K | 2,671,721 −0% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 101 | $44.49 | $4.5K | 2,671,721 −0% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.