Senior insider sale
CFO & Head of Corp. Dev. at SIONNA THERAPEUTICS, INC. — senior position signals high conviction
$1.92M
85K shares
What this filing means
RIDLOFF ELENA plans to sell 85K shares of SIONNA THERAPEUTICS, INC. valued at approximately $1.92M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.
Filed: 8/26/2025ACC: 0001950047-25-006401
Officer· CFO & Head of Corp. Dev.
Since Feb 2025
85K
Shares to sell
$1.92M
Approx. market value
33K
Acquired (3 months)
1
Planned
2 completed
Securities Acquired — Last 3 Months1
Previously Exercised Stock Options
Cash
6/15/2023
33KTotal acquired33K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
6/15/2023 | Previously Exercised Stock Options Cash | 33K | — |
| Total | 33K | ||
Planned & Completed Dispositions3
Completed
—Completed
Units to sell
17.50K
Market value
$397.2K
8/20/2025
—Completed
Units to sell
34.50K
Market value
$727.1K
8/19/2025
Planned — Approximate Date
NASDAQPlanned
Units to sell
33K
Market value
$794.0K
8/26/2025
Total
Units
85K
Value
$1.92M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
8/20/2025 | 17.50K | $397.2K | — | Completed |
8/19/2025 | 34.50K | $727.1K | — | Completed |
| Planned — Approximate Date | ||||
8/26/2025 | 33K | $794.0K | NASDAQ | Planned |
| Total | 85K | $1.92M | ||