Elena Ridloff sold $1.1M of SION
CFO & Head of Corp. Dev. at Sionna Therapeutics, Inc.. 52,000 shares at an average of $21.62, traded Aug 19, 2025, filed Aug 21, 2025.
Score components
- +22RoleCFO
- +25Trade size$1.1M at market
- +10Share of holdings soldSold 42% of holdings
- +8Cluster2 insiders selling within 14 days
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001482981-25-000143, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 19, 2025 | SOpen-market sale Common Stock10b5-1 | -34,500 | $21.08 | $727k | 89,032 | Aug 21, 2025 |
| Aug 20, 2025 | SOpen-market sale Common Stock10b5-1 | -17,500 | $22.69 | $397k | 71,532 | Aug 21, 2025 |
Related signals
Other insiders at Sionna Therapeutics, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 50Moderate | SIONsell Sionna Therapeutics, Inc. | Ra Capital Management, L.p. director, owner | $22M 3,448,811 shares | -50% | |
| 28Weak | Sionna Therapeutics, Inc. | Orbimed Advisors LLC director | $1.5M 33,356 shares | -1% | |
| 28Weak | Sionna Therapeutics, Inc. | Peter A. Thompson director | $1.5M 33,356 shares | -1% | |
| 19Weak | Sionna Therapeutics, Inc. | Orbimed Advisors LLC director | $83k 1,875 shares | -0% | |
| 19Weak | Sionna Therapeutics, Inc. | Peter A. Thompson director | $83k 1,875 shares | -0% | |
| 31Weak | Sionna Therapeutics, Inc. | Jennifer Fitzpatrick Chief Legal Officer | $415k 10,250 shares | -100% | |
| 35Weak | Sionna Therapeutics, Inc. | Orbimed Advisors LLC director | $4.8M 108,073 shares | -3% | |
| 35Weak | Sionna Therapeutics, Inc. | Peter A. Thompson director | $4.8M 108,073 shares | -3% | |
| 55Moderate | Sionna Therapeutics, Inc. | Ra Capital Management, L.p. director, owner | $1.2M 30,316 shares | -0% | |
| 55Moderate | Sionna Therapeutics, Inc. | Ra Capital Management, L.p. director, owner | $5.5M 136,351 shares | -2% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.