Stephen W. Webster is CFO at Spark Therapeutics, Inc. (ONCE). They have made 14 open-market trades across 4 companies since 2011, most recently 2025-04-04.
CIK 0001609351
4 open-market purchases totalling $155K since 2011, against 10 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| NBRV | SELL | 2022-08-02 | 2022-08-04 | $0.19 | $1K | +6.8% | -12.9% | -46.6% |
| NBRV | SELL | 2021-08-02 | 2021-08-04 | $1.20 | $932 | -15.0% | -7.5% | +1.7% |
| VKTX | BUY | 2018-05-29 | 2018-05-31 | $5.21 | $42K | -3.9% | -5.5% | +13.4% |
| NBRV | BUY | 2018-05-23 | 2018-05-23 | $4.59 | $37K | -0.2% | -17.3% | -43.3% |
| ONCE | SELL | 2017-11-16 | 2017-11-20 | $70.14 | $701K | -4.6% | -34.8% | -31.6% |
| ONCE | SELL | 2017-08-15 | 2017-08-15 | $79.38 | $794K | +2.5% | +3.7% | -7.4% |
| ONCE | SELL | 2017-07-31 | 2017-08-02 | $71.12 | $332K | +2.1% | +5.3% | +3.7% |
| ONCE | SELL | 2017-06-19 | 2017-06-21 | $60.00 | $460K | -7.4% | +6.5% | +32.4% |
| ONCE | SELL | 2017-04-25 | 2017-04-26 | $55.22 | $447K | +1.3% | -7.4% | +23.7% |
| ONCE | SELL | 2017-04-24 | 2017-04-26 | $55.18 | $552K | +1.3% | -7.4% | +23.7% |
| ONCE | SELL | 2016-05-20 | 2016-05-24 | $50.39 | $1.0M | +3.6% | -11.5% | +8.4% |
| ONCE | SELL | 2015-10-07 | 2015-10-09 | $48.86 | $977K | -31.5% | -6.4% | -23.3% |
| ONCE | BUY | 2015-02-04 | 2015-02-06 | $23.00 | $58K | -31.5% | -6.4% | -6.4% |
| ADLR | BUY | 2011-06-27 | 2011-06-27 | $1.88 | $19K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.