Josef H Von Rickenbach bought $50k of RNTX
director at Aileron Therapeutics, Inc.. 47,060 shares at an average of $1.05, traded May 21, 2026, filed May 28, 2026.
Score components
- +15RoleDirector
- +7Trade size$50k at market
- +10Relative to holdingsHoldings up 305%
- +18Price context7% above the 52-week low; 49% below the 52-week high
- 0ClusterNo other insider buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
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 0001193125-26-245832, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| May 21, 2026 | POpen-market purchase Common stock , $0.001 par value | +3,420 | $1.04 | $3,564 | 18,874 | May 28, 2026 |
| May 22, 2026 | POpen-market purchase Common stock , $0.001 par value | +15,950 | $1.05 | $17k | 34,824 | May 28, 2026 |
| May 26, 2026 | POpen-market purchase Common stock , $0.001 par value | +23,190 | $1.06 | $24k | 58,014 | May 28, 2026 |
| May 27, 2026 | POpen-market purchase Common stock , $0.001 par value | +4,500 | $1.07 | $4,819 | 62,514 | May 28, 2026 |
Related signals
Other insiders at Aileron Therapeutics, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 38Weak | RNTXbuy Aileron Therapeutics, Inc. | James Brian Windsor See Remarks | $25k 25,000 shares | +1222% | |
| 26Weak | RNTXbuy Aileron Therapeutics, Inc. | Voss Capital, LLC owner | $128k 104,183 shares | +13% | |
| 29Weak | RNTXbuy Aileron Therapeutics, Inc. | Voss Capital, LLC owner | $423k 306,050 shares | +44% | |
| 33Weak | RNTXbuy Aileron Therapeutics, Inc. | James Brian Windsor President and CEO | $898 400 shares | - | |
| 12Weak | RNTXsell Aileron Therapeutics, Inc. | University Of Texas/texas Am Investment Management Co owner | $22k 6,607 shares | -0% | |
| 21Weak | RNTXsell Aileron Therapeutics, Inc. | University Of Texas/texas Am Investment Management Co owner | $81k 24,671 shares | -1% | |
| 18Weak | RNTXsell Aileron Therapeutics, Inc. | University Of Texas/texas Am Investment Management Co owner | $41k 12,315 shares | -1% | |
| 21Weak | RNTXsell Aileron Therapeutics, Inc. | University Of Texas/texas Am Investment Management Co owner | $85k 20,315 shares | -1% | |
| 23Weak | RNTXsell Aileron Therapeutics, Inc. | University Of Texas/texas Am Investment Management Co owner | $139k 31,151 shares | -2% | |
| 37Weak | RNTXbuy Aileron Therapeutics, Inc. | James Brian Windsor President and COO | $758 225 shares | - |
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.