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Magnite stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+84.0% to $27.39
Magnite (MGNI) stock rose 84% over the last 252 sessions, to $27.39. On the way it reported 4 quarters, its insiders filed 4 open-market trades and 25 Form 144 notices of planned sales, and the company filed 4 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 5, 2026 | Form 144 | Form 144: David Buonasera plans to sell $130K | +18.9% (+23.4% vs SPY) | — | — |
| Nov 5, 2026 | Form 144 | Form 144: Sean Buckley plans to sell $250K | +18.9% (+23.4% vs SPY) | — | — |
| Nov 4, 2026 | Earnings | Earnings: beat the EPS estimate by 16.9% | +2.0% (+0.4% vs SPY) | — | — |
| Oct 7, 2026 | 8-K | Material definitive agreement | +0.8% (+1.2% vs SPY) | −5.6% (−4.6% vs SPY) | +8.6% (+14.5% vs SPY) |
| Sep 21, 2026 | 8-K | Directors and officers: departures, appointments, pay | −2.0% (−2.0% vs SPY) | −7.9% (−6.8% vs SPY) | −6.1% (−5.5% vs SPY) |
| Sep 17, 2026 | Form 144 | Form 144: Douglas S. Knopper & Abigail L. Knopper Ttees of the Knopper Joint Mgmt Trust 11/15/13 plans to sell $888K | +7.5% (+6.4% vs SPY) | +1.2% (−0.9% vs SPY) | +2.9% (+0.3% vs SPY) |
| Sep 17, 2026 | Form 144 | Form 144: Paul Caine plans to sell $476K | +7.5% (+6.4% vs SPY) | +1.2% (−0.9% vs SPY) | +2.9% (+0.3% vs SPY) |
| Sep 14, 2026 | Form 144 | Form 144: David Buonasera plans to sell $28K | +0.3% (+0.7% vs SPY) | +5.6% (+5.7% vs SPY) | +5.3% (+3.3% vs SPY) |
| Sep 14, 2026 | Form 144 | Form 144: Robert Spillane plans to sell $246K | +0.3% (+0.7% vs SPY) | +5.6% (+5.7% vs SPY) | +5.3% (+3.3% vs SPY) |
| Sep 14, 2026 | Insider sale | Spillane Robert F sold $246K | +0.3% (+0.7% vs SPY) | +5.6% (+5.7% vs SPY) | +5.3% (+3.3% vs SPY) |
| Sep 11, 2026 | Form 144 | Form 144: Katheryn Evans plans to sell $336K | +0.9% (+0.1% vs SPY) | +8.4% (+7.8% vs SPY) | +7.5% (+4.6% vs SPY) |
| Sep 10, 2026 | Form 144 | Form 144: Aaron Saltz plans to sell $1.4M | −0.1% (+0.5% vs SPY) | +0.8% (+1.9% vs SPY) | +7.6% (+5.8% vs SPY) |
| Sep 10, 2026 | Form 144 | Form 144: Paul Caine plans to sell $236K | −0.1% (+0.5% vs SPY) | +0.8% (+1.9% vs SPY) | +7.6% (+5.8% vs SPY) |
| Sep 9, 2026 | Form 144 | Form 144: Katheryn Evans plans to sell $260K | −0.5% (0.0% vs SPY) | 0.0% (+1.2% vs SPY) | +6.3% (+4.6% vs SPY) |
| Sep 8, 2026 | Form 144 | Form 144: Katheryn Evans plans to sell $763K | −1.8% (−1.3% vs SPY) | −1.3% (0.0% vs SPY) | +2.8% (+1.4% vs SPY) |
| Sep 2, 2026 | Form 144 | Form 144: David Buonasera plans to sell $26K | +8.3% (+7.9% vs SPY) | +3.0% (+2.9% vs SPY) | +10.5% (+10.0% vs SPY) |
| Sep 1, 2026 | Form 144 | Form 144: David Buonasera plans to sell $126K | −2.6% (−1.9% vs SPY) | +0.9% (+1.0% vs SPY) | +7.2% (+7.6% vs SPY) |
| Aug 28, 2026 | Form 144 | Form 144: Sarah Patricia Harden plans to sell $442K | +1.4% (+1.7% vs SPY) | +5.3% (+5.0% vs SPY) | +0.1% (+0.6% vs SPY) |
| Aug 26, 2026 | Form 144 | Form 144: Sarah Patricia Harden plans to sell $712K | −2.2% (−2.2% vs SPY) | −4.3% (−3.7% vs SPY) | +0.7% (+0.3% vs SPY) |
| Aug 18, 2026 | Form 144 | Form 144: Sean Buckley plans to sell $67K | +1.4% (+2.1% vs SPY) | −2.6% (−1.5% vs SPY) | −1.7% (+0.7% vs SPY) |
| Aug 17, 2026 | Form 144 | Form 144: Sean Buckley plans to sell $205K | −2.2% (−1.7% vs SPY) | −5.1% (−3.7% vs SPY) | −4.2% (−1.8% vs SPY) |
| Aug 14, 2026 | Form 144 | Form 144: Paul Caine plans to sell $61K | +0.6% (+0.8% vs SPY) | −5.1% (−3.1% vs SPY) | −3.1% (−0.9% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: Brian Gephart plans to sell $308K | −2.1% (−2.0% vs SPY) | 0.0% (−0.4% vs SPY) | −4.2% (−3.3% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: Rachel Lam plans to sell $242K | −2.1% (−2.0% vs SPY) | 0.0% (−0.4% vs SPY) | −4.2% (−3.3% vs SPY) |
| Aug 10, 2026 | Insider sale | Lam Rachel sold $242K | −2.1% (−2.0% vs SPY) | 0.0% (−0.4% vs SPY) | −4.2% (−3.3% vs SPY) |
| Aug 10, 2026 | Insider sale | Gephart Brian sold $308K | −2.1% (−2.0% vs SPY) | 0.0% (−0.4% vs SPY) | −4.2% (−3.3% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: David Buonasera plans to sell $179K | +16.3% (+16.4% vs SPY) | +16.3% (+16.0% vs SPY) | +17.5% (+17.1% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Douglas S. Knopper & Abigail L. Knopper Ttees of the Knopper Joint Mgmt Trust 11/15/13 plans to sell $376K | +16.3% (+16.4% vs SPY) | +16.3% (+16.0% vs SPY) | +17.5% (+17.1% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Katheryn Evans plans to sell $480K | +16.3% (+16.4% vs SPY) | +16.3% (+16.0% vs SPY) | +17.5% (+17.1% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Douglas Knopper plans to sell $395K | +16.3% (+16.4% vs SPY) | +16.3% (+16.0% vs SPY) | +17.5% (+17.1% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Sean Buckley plans to sell $1.4M | +16.3% (+16.4% vs SPY) | +16.3% (+16.0% vs SPY) | +17.5% (+17.1% vs SPY) |
| Aug 5, 2026 | Earnings | Earnings: missed the EPS estimate by -1.1% | −0.9% (−0.7% vs SPY) | +15.3% (+15.4% vs SPY) | +17.6% (+18.4% vs SPY) |
| May 19, 2026 | Insider sale | Spillane Robert F sold $133K | 0.0% (+0.7% vs SPY) | −0.8% (−2.4% vs SPY) | +30.9% (+30.6% vs SPY) |
| May 6, 2026 | Earnings | Earnings: beat the EPS estimate by 23.0% | −1.6% (−2.9% vs SPY) | +1.6% (−0.4% vs SPY) | +8.8% (+4.3% vs SPY) |
| Apr 20, 2026 | 8-K | Directors and officers: departures, appointments, pay | −6.8% (−6.1% vs SPY) | −7.2% (−8.1% vs SPY) | −4.5% (−7.9% vs SPY) |
| Apr 10, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.9% (−0.1% vs SPY) | +13.5% (+9.1% vs SPY) | +10.9% (+2.5% vs SPY) |
| Feb 25, 2026 | Earnings | Earnings: missed the EPS estimate by -3.9% | +2.3% (+1.4% vs SPY) | +16.3% (+17.3% vs SPY) | +3.4% (+7.7% vs SPY) |
Insiders’ record here
In the year on the chart, Magnite's insiders reported 0 open-market buys ($0) and 4 sales ($929K). Of the 3 old enough to score, 0 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale +18.1%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Magnite: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.