David Day is CFO at MAGNITE, INC. (MGNI). They have made 25 open-market trades across 2 companies since 2013, most recently 2026-08-15.
CIK 0001523288
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 25 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MGNI | SELL | 2025-08-18 | 2025-08-20 | $23.85 | $638K | +16.2% | +17.8% | -39.1% |
| MGNI | SELL · 10b5-1 | 2025-06-30 | 2025-07-02 | $22.00 | $477K | -5.4% | -10.9% | -12.5% |
| MGNI | SELL · 10b5-1 | 2025-06-24 | 2025-06-26 | $20.46 | $1.5M | +12.9% | +12.3% | +8.7% |
| MGNI | SELL · 10b5-1 | 2025-06-18 | 2025-06-20 | $18.95 | $1.4M | +33.9% | +32.6% | +29.6% |
| MGNI | SELL · 10b5-1 | 2025-02-06 | 2025-02-07 | $19.33 | $1.3M | -12.6% | -41.1% | -28.7% |
| MGNI | SELL · 10b5-1 | 2025-01-03 | 2025-01-07 | $17.00 | $227K | -5.5% | +15.1% | -45.0% |
| MGNI | SELL · 10b5-1 | 2024-12-16 | 2024-12-18 | $16.40 | $603K | -0.5% | -3.5% | -20.6% |
| MGNI | SELL · 10b5-1 | 2024-07-15 | 2024-07-17 | $15.00 | $286K | -1.6% | -14.6% | -16.1% |
| MGNI | SELL · 10b5-1 | 2024-06-12 | 2024-06-14 | $14.01 | $597K | -7.0% | +10.5% | -2.3% |
| MGNI | SELL · 10b5-1 | 2024-06-03 | 2024-06-05 | $13.00 | $270K | +3.6% | +1.1% | +0.2% |
| MGNI | SELL · 10b5-1 | 2024-05-16 | 2024-05-17 | $12.00 | $232K | +5.6% | +18.4% | +6.8% |
| MGNI | SELL | 2023-08-16 | 2023-08-18 | $8.31 | $151K | +4.4% | -2.8% | -4.0% |
| MGNI | SELL · 10b5-1 | 2023-07-11 | 2023-07-13 | $15.00 | $144K | -6.1% | -44.0% | -51.7% |
| MGNI | SELL · 10b5-1 | 2023-06-29 | 2023-06-30 | $14.00 | $302K | +14.6% | +12.0% | -43.7% |
| MGNI | SELL · 10b5-1 | 2023-06-12 | 2023-06-14 | $13.41 | $427K | -2.7% | +10.1% | -41.9% |
| MGNI | SELL | 2023-05-16 | 2023-05-18 | $10.88 | $350K | +1.4% | +14.5% | -28.8% |
| MGNI | SELL | 2021-08-16 | 2021-08-18 | $26.82 | $278K | +16.8% | +20.0% | -8.9% |
| MGNI | SELL | 2021-05-17 | 2021-05-19 | $25.98 | $1.8M | +16.0% | +10.6% | -1.8% |
| MGNI | SELL | 2021-03-25 | 2021-03-26 | $39.74 | $831K | -0.0% | +1.7% | -10.5% |
| MGNI | SELL | 2021-03-10 | 2021-03-12 | $46.99 | $1.9M | -16.1% | -15.8% | -31.2% |
| MGNI | SELL | 2021-02-16 | 2021-02-18 | $60.69 | $895K | -6.1% | -4.4% | -51.0% |
| MGNI | SELL | 2020-11-30 | 2020-12-02 | $19.44 | $701K | -1.0% | +45.9% | +168.0% |
| MGNI | SELL | 2020-11-19 | 2020-11-23 | $13.49 | $4.1M | +23.5% | +85.9% | +247.2% |
| MGNI | SELL | 2020-11-16 | 2020-11-18 | $11.06 | $360K | +55.7% | +90.6% | +363.2% |
| MGNI | SELL | 2020-11-06 | 2020-11-09 | $11.70 | $1.3M | +15.2% | +50.9% | +376.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.