SION Sionna Therapeutics, Inc.
$8.26
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.
Insider signal
In line
Selling ran in line with SION's own trailing one-year pace, with 73% of sale value under a prearranged plan.
Cluster activity
0 buyers in the last 30 days
0 buyers in the last 90 days
3 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
5
147 transactions
Purchases
$0
0 shares
Sales
$171.2M
4,139,445 shares
Net activity
-$171.2M
purchases less sales
How much of that selling was preplanned? 73% planned / 27% discretionary
10b5-1 plan sales
$124.3M
84 transactions · 3,000,654 shares
Discretionary sales
$47.0M
63 transactions · 1,138,791 shares
Largest single sale: $10.5M.
Where they traded
Buy
Sell
Dot area is proportional to transaction value.
No open-market insider purchase on record.
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| 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 | |
| Sell 10b5-1 | 184,639 | $46.22 | $8.5M | 2,671,822 −6.5% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 184,639 | $46.22 | $8.5M | 2,671,822 −6.5% of holding | |
| Sell 10b5-1 | 59,767 | $44.58 | $2.7M | 2,856,461 −2% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 59,767 | $44.58 | $2.7M | 2,856,461 −2% of holding | |
| Sell 10b5-1 | 48,546 | $44.61 | $2.2M | 2,916,228 −1.6% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 48,546 | $44.61 | $2.2M | 2,916,228 −1.6% of holding | |
| Sell 10b5-1 | 2,948 | $44.52 | $131.2K | 2,964,774 −0.1% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 2,948 | $44.52 | $131.2K | 2,964,774 −0.1% of holding | |
| Sell 10b5-1 | 52,397 | $44.68 | $2.3M | 2,967,722 −1.7% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 52,397 | $44.68 | $2.3M | 2,967,722 −1.7% of holding | |
| Sell 10b5-1 | 226,906 | $45.34 | $10.3M | 3,020,119 −7% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 226,906 | $45.34 | $10.3M | 3,020,119 −7% of holding | |
| Sell 10b5-1 | 235,863 | $44.64 | $10.5M | 3,247,025 −6.8% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 235,863 | $44.64 | $10.5M | 3,247,025 −6.8% of holding | |
| Sell 10b5-1 | 47,814 | $44.51 | $2.1M | 3,482,888 −1.4% of holding | |||
| Thompson Peter A. | Director | Sell 10b5-1 | 47,814 | $44.51 | $2.1M | 3,482,888 −1.4% of holding | |
| Fitzpatrick Jennifer | Chief Legal Officer | Sell 10b5-1 | 10,250 | $33.86 | $347.0K | None left | |
| Sell | 29,063 | $44.58 | $1.3M | 3,530,702 −0.8% of holding | |||
| Thompson Peter A. | Director | Sell | 29,063 | $44.58 | $1.3M | 3,530,702 −0.8% of holding | |
| Sell | 1,890 | $44.57 | $84.2K | 3,559,765 −0.1% of holding | |||
| Thompson Peter A. | Director | Sell | 1,890 | $44.57 | $84.2K | 3,559,765 −0.1% of holding | |
| Sell | 250,000 | $40.00 | $10.0M | 6,494,962 −3.7% of holding | |||
| Sell | 33,356 | $44.55 | $1.5M | 3,561,655 −0.9% of holding | |||
| Thompson Peter A. | Director | Sell | 33,356 | $44.55 | $1.5M | 3,561,655 −0.9% of holding | |
| Sell | 875 | $44.49 | $38.9K | 3,595,011 −0% of holding | |||
| Thompson Peter A. | Director | Sell | 875 | $44.49 | $38.9K | 3,595,011 −0% of holding | |
| Sell | 100 | $44.49 | $4.4K | 3,595,886 −0% of holding | |||
| Thompson Peter A. | Director | Sell | 100 | $44.49 | $4.4K | 3,595,886 −0% of holding | |
| Sell | 900 | $44.50 | $40.1K | 3,595,986 −0% of holding | |||
| Thompson Peter A. | Director | Sell | 900 | $44.50 | $40.1K | 3,595,986 −0% of holding | |
| Fitzpatrick Jennifer | Chief Legal Officer | Sell 10b5-1 | 10,250 | $40.52 | $415.3K | None left | |
| Sell | 1,600 | $44.49 | $71.2K | 3,596,886 −0% of holding | |||
| Thompson Peter A. | Director | Sell | 1,600 | $44.49 | $71.2K | 3,596,886 −0% of holding | |
| Sell | 11,890 | $44.60 | $530.3K | 3,598,486 −0.3% of holding | |||
| Thompson Peter A. | Director | Sell | 11,890 | $44.60 | $530.3K | 3,598,486 −0.3% of holding | |
| Sell | 94,583 | $44.54 | $4.2M | 3,610,376 −2.6% of holding | |||
| Thompson Peter A. | Director | Sell | 94,583 | $44.54 | $4.2M | 3,610,376 −2.6% of holding | |
| 4 fills | Sell | 25,183 | $39.50 | $994.7K | 6,897,623 −0.4% of holding | ||
| 8 fills | Sell | 5,133 | $40.13 | $206.0K | 6,898,929 −0.1% of holding | ||
| 8 fills | Sell | 47,442 | $40.01 | $1.9M | 6,899,081 −0.7% of holding | ||
| 4 fills | Sell | 6,922 | $39.57 | $273.9K | 6,901,357 −0.1% of holding | ||
| 12 fills | Sell | 81,987 | $40.59 | $3.3M | 6,903,443 −1.2% of holding | ||
| 4 fills | Sell | 62,610 | $39.58 | $2.5M | 6,905,625 −0.9% of holding | ||
| 4 fills | Sell | 311,000 | $39.50 | $12.3M | 6,909,249 −4.3% of holding | ||
| Cloonan Michael 4 fills | President & CEO | Sell 10b5-1 | 99,800 | $36.26 | $3.6M | 547,343 −15.4% of holding | |
| Booth Bruce 10 fills | Director | Sell 10b5-1 | 88,878 | $34.22 | $3.0M | 2,360,156 −3.6% of holding | |
| Booth Bruce 4 fills | Director | Sell 10b5-1 | 55,985 | $32.09 | $1.8M | 2,408,283 −2.3% of holding | |
| Booth Bruce 6 fills | Director | Sell 10b5-1 | 61,124 | $32.37 | $2.0M | 2,450,467 −2.4% of holding | |
| Booth Bruce 8 fills | Director | Sell 10b5-1 | 169,260 | $32.35 | $5.5M | 2,610,589 −6.1% of holding | |
| Cloonan Michael 2 fills | President & CEO | Sell 10b5-1 | 10,425 | $31.51 | $328.5K | 547,343 −1.9% of holding | |
| Booth Bruce 4 fills | Director | Sell 10b5-1 | 115,856 | $30.61 | $3.5M | 2,649,217 −4.2% of holding | |
| Cloonan Michael | President & CEO | Sell 10b5-1 | 14,775 | $31.11 | $459.7K | 547,343 −2.6% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 606 | $29.95 | $18.1K | 2,714,943 −0% of holding | |
| Booth Bruce 4 fills | Director | Sell 10b5-1 | 58,232 | $30.38 | $1.8M | 2,719,526 −2.1% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 20,238 | $29.98 | $606.7K | 2,763,574 −0.7% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 11,800 | $29.95 | $353.4K | 2,780,301 −0.4% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 37,746 | $30.00 | $1.1M | 2,790,054 −1.3% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 200 | $29.95 | $6.0K | 2,821,252 −0% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 12,388 | $30.06 | $372.4K | 2,821,417 −0.4% of holding | |
| Booth Bruce 2 fills | Director | Sell 10b5-1 | 66,105 | $30.09 | $2.0M | 2,831,656 −2.3% of holding | |
| Cloonan Michael | President & CEO | Sell 10b5-1 | 7,793 | $29.70 | $231.5K | 547,343 −1.4% of holding | |
| Cloonan Michael | President & CEO | Sell 10b5-1 | 17,207 | $28.85 | $496.3K | 547,343 −3% 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.