Senior insider sale
SIONNA THERAPEUTICS, INC. — senior position signals high conviction
$21.83M
3.45M shares
What this filing means
RA CAPITAL HEALTHCARE FUND LP plans to sell 3.45M shares of SIONNA THERAPEUTICS, INC. valued at approximately $21.83M. 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: 9/17/2026ACC: 0001315082-26-000002
Director10% Owner
Since Feb 2025
3.45M
Shares to sell
$21.83M
Approx. market value
3.45M
Acquired (3 months)
1
Planned
Securities Acquired — Last 3 Months3
InitialPublic Offering
Wire
2/7/2025
1.02MPrivate Transaction
Wire
3/4/2024
1.82MPrivate Transaction
Wire
2/2/2022
606.50KTotal acquired3.45M
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
2/7/2025 | InitialPublic Offering Wire | 1.02M | — |
3/4/2024 | Private Transaction Wire | 1.82M | — |
2/2/2022 | Private Transaction Wire | 606.50K | — |
| Total | 3.45M | ||
Planned & Completed Dispositions1
Nasdaq GMPlanned
Units to sell
3.45M
Market value
$21.83M
9/17/2026
Total
Units
3.45M
Value
$21.83M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
9/17/2026 | 3.45M | $21.83M | Nasdaq GM | Planned |
| Total | 3.45M | $21.83M | ||