Stephen George Dilly is CEO & President at Aimmune Therapeutics, Inc. (AIMT). They have made 17 open-market trades across 4 companies since 2016, most recently 2025-11-11.
CIK 0001389147
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
2 open-market purchases totalling $381K since 2021, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CDXS | BUY | 2023-09-08 | 2023-09-12 | $1.73 | $202K | -15.7% | +4.3% | +13.0% |
| CDXS | SELL | 2023-03-07 | 2023-03-09 | $4.58 | $505K | -9.4% | -7.4% | -42.4% |
| SRRA | BUY | 2021-05-19 | 2021-05-20 | $17.83 | $178K | -0.7% | +1.4% | +11.0% |
| SGMO | SELL | 2020-03-19 | 2020-03-20 | $6.00 | $210K | +2.6% | +32.7% | +55.4% |
| SGMO | SELL | 2020-03-16 | 2020-03-18 | $6.02 | $90K | +18.0% | +38.0% | +106.4% |
| AIMT | SELL | 2018-06-11 | 2018-06-13 | $30.83 | $1.8M | -8.6% | -2.8% | -8.6% |
| AIMT | SELL | 2018-06-06 | 2018-06-08 | $30.88 | $5.5M | -2.1% | -7.6% | -14.2% |
| AIMT | SELL | 2018-06-05 | 2018-06-05 | $31.83 | $1.2M | -3.2% | -11.4% | -13.5% |
| AIMT | SELL | 2018-06-04 | 2018-06-05 | $31.88 | $2.1M | -3.2% | -11.4% | -13.5% |
| AIMT | SELL | 2018-06-01 | 2018-06-05 | $32.61 | $2.0M | -3.2% | -11.4% | -13.5% |
| AIMT | SELL | 2018-06-01 | 2018-06-05 | $32.14 | $10.6M | -3.2% | -11.4% | -13.5% |
| AIMT | SELL | 2017-10-23 | 2017-10-25 | $33.54 | $6.7M | -1.3% | +15.1% | +22.0% |
| AIMT | SELL · 10b5-1 | 2017-10-16 | 2017-10-18 | $26.24 | $30K | +13.5% | +34.4% | +46.0% |
| AIMT | SELL | 2017-10-04 | 2017-10-06 | $26.24 | $3.9M | +2.5% | +21.2% | +45.4% |
| AIMT | SELL | 2017-09-25 | 2017-09-27 | $25.01 | $2.5M | +0.2% | +17.5% | +53.8% |
| AIMT | SELL | 2017-07-26 | 2017-07-28 | $21.46 | $1.1M | -12.0% | -3.0% | +42.3% |
| AIMT | SELL | 2017-06-23 | 2017-06-27 | $20.21 | $998K | -1.2% | +2.7% | +20.3% |
| AIMT | SELL · 10b5-1 | 2017-05-10 | 2017-05-12 | $20.15 | $12K | -10.2% | -8.0% | -1.3% |
| AIMT | SELL | 2016-11-10 | 2016-11-15 | $25.01 | $1.8M | -5.5% | -13.1% | -26.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.