Sean Patrick Buckley is President at MAGNITE, INC. (MGNI). They have made 4 open-market trades across 1 company since 2023, most recently 2026-08-18.
CIK 0001865116
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 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MGNI | 293,060 | $6.9M |
Shares reported on the most recent Form 4, priced at the 2026-08-18 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MGNI | SELL · 10b5-1 | 2026-08-17 | 2026-08-18 | $24.48 | $270K | -3.5% | +4.4% | — |
| MGNI | SELL · 10b5-1 | 2026-08-06 | 2026-08-07 | $24.49 | $1.6M | -2.6% | -3.2% | — |
| MGNI | SELL · 10b5-1 | 2026-07-07 | 2026-07-09 | $21.03 | $404K | -10.4% | +13.4% | +18.2% |
| MGNI | SELL · 10b5-1 | 2026-06-17 | 2026-06-18 | $19.00 | $365K | +16.3% | +8.7% | +36.4% |
| MGNI | SELL · 10b5-1 | 2025-11-24 | 2025-11-26 | $14.50 | $32K | +4.4% | +10.8% | -21.2% |
| MGNI | SELL · 10b5-1 | 2025-11-18 | 2025-11-18 | $13.36 | $118K | +10.3% | +23.7% | -13.7% |
| MGNI | SELL | 2025-09-08 | 2025-09-10 | $25.09 | $1.0M | +0.5% | -27.2% | -35.5% |
| MGNI | SELL · 10b5-1 | 2025-08-18 | 2025-08-20 | $23.65 | $956K | +16.2% | +17.8% | -39.1% |
| MGNI | SELL · 10b5-1 | 2025-05-16 | 2025-05-16 | $15.73 | $305K | +8.3% | +23.9% | +57.4% |
| MGNI | SELL · 10b5-1 | 2025-02-19 | 2025-02-21 | $19.13 | $403K | -18.3% | -25.1% | -12.0% |
| MGNI | SELL · 10b5-1 | 2025-02-07 | 2025-02-07 | $20.00 | $374K | -12.6% | -41.1% | -28.7% |
| MGNI | SELL · 10b5-1 | 2024-11-18 | 2024-11-19 | $15.60 | $312K | +5.7% | -3.4% | +19.2% |
| MGNI | SELL · 10b5-1 | 2024-11-11 | 2024-11-13 | $15.00 | $79K | -0.9% | -1.7% | +20.7% |
| MGNI | SELL · 10b5-1 | 2024-08-19 | 2024-08-21 | $13.02 | $68K | -2.3% | -5.6% | +18.4% |
| MGNI | SELL · 10b5-1 | 2024-07-15 | 2024-07-17 | $14.83 | $872K | -1.6% | -14.6% | -16.1% |
| MGNI | SELL · 10b5-1 | 2024-06-05 | 2024-06-07 | $13.50 | $585K | +2.7% | +6.0% | +8.4% |
| MGNI | SELL · 10b5-1 | 2024-05-24 | 2024-05-29 | $12.50 | $34K | +6.4% | +8.0% | +13.2% |
| MGNI | SELL · 10b5-1 | 2024-05-16 | 2024-05-17 | $12.50 | $423K | +5.6% | +18.4% | +6.8% |
| MGNI | SELL | 2023-08-16 | 2023-08-18 | $8.31 | $44K | +4.4% | -2.8% | -4.0% |
| MGNI | SELL | 2023-06-02 | 2023-06-06 | $12.99 | $317K | +1.2% | -3.6% | -37.9% |
| MGNI | SELL | 2023-05-16 | 2023-05-18 | $10.88 | $123K | +1.4% | +14.5% | -28.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.