Thomas Kershaw is CTO at RUBICON PROJECT, INC. (RUBI). They have made 13 open-market trades across 2 companies since 2019, most recently 2021-05-17.
CIK 0001686179
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 13 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MGNI | SELL | 2021-05-17 | 2021-05-19 | $25.98 | $2.1M | +16.0% | +10.6% | -1.8% |
| MGNI | SELL | 2021-04-05 | 2021-04-07 | $40.44 | $8.0M | -9.3% | -9.9% | -13.5% |
| MGNI | SELL | 2021-02-16 | 2021-02-18 | $59.20 | $3.0M | -6.1% | -4.4% | -51.0% |
| MGNI | SELL | 2020-11-16 | 2020-11-18 | $11.06 | $336K | +55.7% | +90.6% | +363.2% |
| MGNI | SELL | 2020-11-16 | 2021-02-18 | $10.97 | $882K | -6.1% | -4.4% | -51.0% |
| MGNI | SELL | 2020-08-17 | 2020-08-19 | $7.48 | $224K | -0.4% | -15.4% | +48.2% |
| RUBI | SELL | 2020-06-03 | 2020-06-05 | $7.50 | $383K | -15.8% | -60.8% | -60.8% |
| RUBI | SELL | 2020-05-20 | 2020-05-20 | $5.13 | $96K | +30.4% | +41.8% | -32.8% |
| RUBI | SELL | 2020-05-18 | 2020-06-05 | $5.25 | $549K | -15.8% | -60.8% | -60.8% |
| RUBI | SELL | 2019-11-18 | 2019-11-19 | $7.57 | $305K | +0.1% | -0.1% | +53.2% |
| RUBI | SELL | 2019-06-12 | 2019-06-14 | $5.60 | $106K | +6.0% | +18.2% | +61.6% |
| RUBI | SELL | 2019-05-16 | 2019-05-17 | $6.19 | $363K | -10.1% | -3.7% | +53.9% |
| RUBI | SELL | 2019-03-15 | 2019-03-19 | $6.91 | $324K | -7.2% | -7.0% | -9.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.