Todd L. Tappin is COO & CFO at RUBICON PROJECT, INC. (RUBI). They have made 10 open-market trades across 1 company since 2015, most recently 2026-10-12.
CIK 0001595974
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 10 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 | 2026-10-12 | 2026-10-14 | $25.29 | $316K | — | — | — |
| MGNI | SELL · 10b5-1 | 2026-09-17 | 2026-09-18 | $26.28 | $981K | +0.1% | — | — |
| MGNI | SELL · 10b5-1 | 2026-09-17 | 2026-09-18 | $26.50 | $199K | +0.1% | — | — |
| MGNI | SELL · 10b5-1 | 2026-09-10 | 2026-09-11 | $23.53 | $118K | +0.2% | +4.4% | — |
| RUBI | SELL | 2016-05-16 | 2016-05-17 | $14.20 | $200K | +4.7% | -0.6% | -31.2% |
| RUBI | SELL | 2016-05-16 | 2016-05-17 | $14.17 | $778K | +4.7% | -0.6% | -31.2% |
| RUBI | SELL | 2016-04-28 | 2016-04-29 | $19.47 | $482K | -25.8% | -24.8% | -27.9% |
| RUBI | SELL | 2016-04-15 | 2016-04-18 | $19.40 | $1.9M | -1.4% | -28.9% | -28.8% |
| RUBI | SELL | 2016-04-14 | 2016-04-18 | $19.89 | $2.3M | -1.4% | -28.9% | -28.8% |
| RUBI | SELL | 2016-04-14 | 2016-04-18 | $19.66 | $4.2M | -1.4% | -28.9% | -28.8% |
| RUBI | SELL | 2016-03-09 | 2016-03-10 | $17.24 | $556K | +2.6% | +10.0% | -13.4% |
| RUBI | SELL | 2016-03-08 | 2016-03-10 | $17.05 | $2.9M | +2.6% | +10.0% | -13.4% |
| RUBI | SELL | 2016-03-08 | 2016-03-10 | $17.08 | $3.4M | +2.6% | +10.0% | -13.4% |
| RUBI | SELL | 2016-02-16 | 2016-02-18 | $12.38 | $139K | +25.6% | +28.1% | +3.9% |
| RUBI | SELL · 10b5-1 | 2015-11-16 | 2015-11-17 | $14.72 | $203K | -8.8% | -0.9% | -22.2% |
| RUBI | SELL · 10b5-1 | 2015-08-17 | 2015-08-18 | $15.24 | $101K | -8.8% | -0.9% | -0.9% |
| RUBI | SELL · 10b5-1 | 2015-05-18 | 2015-05-22 | $17.21 | $449K | -8.8% | -0.9% | -0.9% |
| RUBI | SELL · 10b5-1 | 2015-05-15 | 2015-05-19 | $17.22 | $678K | -8.8% | -0.9% | -0.9% |
| RUBI | SELL · 10b5-1 | 2015-02-25 | 2015-02-27 | $20.04 | $397K | -8.8% | -0.9% | -0.9% |
| RUBI | SELL · 10b5-1 | 2015-02-17 | 2015-02-18 | $16.09 | $91K | -8.8% | -0.9% | -0.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.