THOMPSON PETER A. sold 14.5% of their position (510.58K shares) of SIONNA THERAPEUTICS, INC. on the open market
Open‑market sale worth $22.95M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 4/16/2026ACC: 0000947871-26-000447
Director
Since Feb 2026
-510.58K
Net shares
Net seller
$22.95M
Total sold
3
Open market trades
0B · 3S
3
Total transactions
510.58K disposed
Non-Derivative Transactions3
Common Stock
Indirect
Shares
−47.81K
Price / share
$44.51
Trade value
$2.13M
% of position
1.4%
4/14/2026
3.53M→3.48M
Common Stock
Indirect
Shares
−235.86K
Price / share
$44.64
Trade value
$10.53M
% of position
6.8%
4/15/2026
3.48M→3.25M
Common Stock
Indirect
Shares
−226.91K
Price / share
$45.34
Trade value
$10.29M
% of position
7.0%
4/16/2026
3.25M→3.02M
Total
Net shares
−510.58K
Net value
-$22.95M
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Indirect | 4/14/2026 | S · Sale | −47.81K | $44.51 | $2.13M | 1.4% | 3.53M | 3.48M |
| Common Stock Indirect | 4/15/2026 | S · Sale | −235.86K | $44.64 | $10.53M | 6.8% | 3.48M | 3.25M |
| Common Stock Indirect | 4/16/2026 | S · Sale | −226.91K | $45.34 | $10.29M | 7.0% | 3.25M | 3.02M |
| Total | −510.58K | -$22.95M | ||||||
Derivative Transactions0
No derivative transactions reported