Douglas S. Knopper is Director at MAGNITE, INC. (MGNI). They have made 2 open-market trades across 1 company since 2021, most recently 2026-08-06.
CIK 0001350876
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.
0 open-market purchases, against 2 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MGNI | SELL · 10b5-1 | 2026-08-06 | 2026-08-07 | $22.72 | $848K | -2.6% | -3.2% | — |
| MGNI | SELL · 10b5-1 | 2026-06-16 | 2026-06-17 | $18.10 | $676K | +4.2% | +4.2% | +30.3% |
| MGNI | SELL · 10b5-1 | 2026-06-10 | 2026-06-10 | $15.73 | $169K | +17.8% | +33.1% | +55.2% |
| MGNI | SELL | 2021-07-09 | 2021-07-13 | $32.74 | $629K | +2.0% | -0.6% | -12.1% |
| MGNI | SELL | 2021-04-05 | 2021-04-07 | $40.00 | $772K | -9.3% | -9.9% | -13.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.