Marvin L. White is Director at Emergent BioSolutions Inc. (EBS). They have made 9 open-market trades across 3 companies since 2015, most recently 2026-08-06.
CIK 0001493324
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.
6 open-market purchases totalling $464K since 2015, against 3 sales. Across 6 scored buys the stock is up 0.4% at ninety days, and 2.1 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 67% | 33% |
| Avg Move | -6.6% | +6.8% | +0.4% |
| Alpha | -3.8% | +6.3% | -2.1% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| EBS | SELL | 2024-11-11 | 2024-11-13 | $11.97 | $342K | -0.7% | -14.5% | -2.5% |
| APVO | BUY | 2019-06-14 | 2019-06-14 | $0.88 | $44K | +2.9% | +0.6% | -23.5% |
| APVO | BUY | 2019-05-20 | 2019-05-20 | $0.81 | $24K | -8.2% | +22.0% | +2.5% |
| APVO | BUY | 2019-05-14 | 2019-05-14 | $0.78 | $8K | -11.1% | +7.6% | -3.6% |
| APVO | BUY | 2018-12-04 | 2018-12-06 | $2.38 | $24K | -27.8% | -30.8% | -34.8% |
| APVO | BUY | 2018-03-19 | 2018-03-21 | $2.93 | $293K | +10.3% | +42.2% | +62.1% |
| APVO | SELL · Routine | 2018-03-19 | 2018-03-21 | $2.93 | $293K | +10.3% | +42.2% | +62.1% |
| EBS | SELL | 2016-03-07 | 2016-03-09 | $35.42 | $919K | -6.6% | +12.8% | +27.0% |
| EBS | SELL | 2016-03-07 | 2016-03-09 | $35.42 | $111K | -6.6% | +12.8% | +27.0% |
| WPG | BUY | 2015-06-19 | 2015-06-23 | $14.23 | $71K | -5.5% | -0.6% | -0.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.