$MGNI insider trading
Over the last 12 months, Magnite insiders reported no purchases and 40 sales totaling $25.9M across SEC Form 4 filings. 88% of those filings were made under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $25.9M 40 events
- Events · 12m
- 40 Form 4 filings, grouped
- Insiders · 12m
- 13 distinct reporters
- 10b5-1 share
- 88% of events, not dollars
All insider trades
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Aug 28, 2026 | Harden Sarah PatriciaD | ▼ Sale | 48,986 | $23.57 | $1.2M | -29.9% | plan · 2 tranches |
| Aug 18, 2026 | Buckley Sean PatrickSee Remarks · O | ▼ Sale | 11,030 | $24.48 | $270K | -3.6% | plan · 2 tranches |
| Aug 14, 2026 | Caine PaulD | ▼ Sale | 7,500 | $25 | $188K | -4.8% | plan |
| Aug 10, 2026 | Gephart BrianCHIEF ACCOUNTING OFFICER · O | ▼ Sale | 12,479 | $24.68 | $308K | -10.5% | — |
| Aug 10, 2026 | Lam RachelD | ▼ Sale | 10,000 | $24.16 | $242K | -4.2% | — |
| Aug 10, 2026 | Caine PaulD | ▼ Sale | 5,000 | $24.35 | $122K | -3.1% | plan |
| Aug 6, 2026 | BARRETT MICHAEL G.CEO · O·D | ▼ Sale | 293,968 | $22.72 | $6.7M | -42.2% | plan |
| Aug 6, 2026 | Buckley Sean PatrickSee Remarks · O | ▼ Sale | 67,179 | $24.49 | $1.6M | -17.5% | plan · 2 tranches |
| Aug 6, 2026 | Knopper Douglas SD | ▼ Sale | 37,337 | $22.72 | $848K | -29.7% | plan |
| Aug 6, 2026 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 7,649 | $23.46 | $179K | -2.8% | plan · 3 tranches |
| Aug 6, 2026 | Evans Katie SeitzSee Remarks · O | ▼ Sale | 20,000 | $24 | $480K | -3.9% | plan |
| Jul 15, 2026 | BARRETT MICHAEL G.CEO · O·D | ▼ Sale | 38,596 | $20.35 | $785K | -8.7% | plan |
| Jul 10, 2026 | Caine PaulD | ▼ Sale | 5,000 | $20.64 | $103K | -3% | plan |
| Jul 7, 2026 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 1,224 | $21 | $26K | -0.5% | plan |
| Jul 7, 2026 | Buckley Sean PatrickSee Remarks · O | ▼ Sale | 19,233 | $21.03 | $404K | -5.1% | plan |
| Jul 1, 2026 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 9,376 | $20 | $188K | -3.4% | plan |
| Jun 29, 2026 | BARRETT MICHAEL G.CEO · O·D | ▼ Sale | 75,000 | $19.5 | $1.5M | -15.7% | plan |
| Jun 17, 2026 | Buckley Sean PatrickSee Remarks · O | ▼ Sale | 19,233 | $19 | $365K | -4.9% | plan |
| Jun 17, 2026 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 13,699 | $18.03 | $247K | -4.7% | plan · 3 tranches |
| Jun 16, 2026 | Knopper Douglas SD | ▼ Sale | 37,337 | $18.1 | $676K | -22.9% | plan |
| Jun 16, 2026 | BARRETT MICHAEL G.CEO · O·D | ▼ Sale | 278,596 | $16.92 | $4.7M | -40.9% | plan · 2 tranches |
| Jun 10, 2026 | Knopper Douglas SD | ▼ Sale | 10,766 | $15.73 | $169K | -6.2% | plan |
| Jun 10, 2026 | PEARSON DAVID T.D | ▼ Sale | 10,766 | $15.65 | $168K | -12% | plan |
| Jun 1, 2026 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 1,409 | $15 | $21K | -0.5% | plan |
| Feb 18, 2026 | Soroca Adam LeeCHIEF PRODUCT OFFICER · O | ▼ Sale | 21,529 | $12 | $258K | -5.3% | plan |
| Dec 17, 2025 | Soroca Adam LeeCHIEF PRODUCT OFFICER · O | ▼ Sale | 16,656 | $17 | $283K | -4.9% | plan |
| Nov 24, 2025 | Buckley Sean PatrickPresident, Revenue · O | ▼ Sale | 2,213 | $14.5 | $32K | -0.8% | plan |
| Nov 21, 2025 | Spillane Robert FD | ▼ Sale | 12,500 | $14.22 | $178K | -18.8% | — |
| Nov 18, 2025 | Buckley Sean PatrickPresident, Revenue · O | ▼ Sale | 4,426 | $13.36 | $59K | -1.6% | plan |
| Nov 18, 2025 | Soroca Adam LeeCHIEF PRODUCT OFFICER · O | ▼ Sale | 10,857 | $13.23 | $144K | -3.2% | plan |
| Oct 24, 2025 | Caine PaulD | ▼ Sale | 5,000 | $20 | $100K | -3.2% | plan |
| Sep 19, 2025 | Saltz AaronCHIEF LEGAL OFFICER · O | ▼ Sale | 8,522 | $24.5 | $209K | -3.8% | plan |
| Sep 19, 2025 | Caine PaulD | ▼ Sale | 7,500 | $25 | $188K | -4.5% | plan |
| Sep 15, 2025 | Saltz AaronCHIEF LEGAL OFFICER · O | ▼ Sale | 6,180 | $23.94 | $148K | -2.7% | plan |
| Sep 10, 2025 | Caine PaulD | ▼ Sale | 5,000 | $23.6 | $118K | -2.9% | plan · 2 tranches |
| Sep 9, 2025 | Buckley Sean PatrickPresident, Revenue · O | ▼ Sale | 40,000 | $25.08 | $1.0M | -12.2% | 2 tranches |
| Sep 4, 2025 | Gephart BrianCHIEF ACCOUNTING OFFICER · O | ▼ Sale | 27,671 | $24.71 | $684K | -23% | plan |
| Sep 3, 2025 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 2,950 | $25.37 | $75K | -1.2% | plan |
| Sep 2, 2025 | Soroca Adam LeeCHIEF PRODUCT OFFICER · O | ▼ Sale | 24,986 | $24.69 | $617K | -6.7% | plan · 2 tranches |
| Aug 29, 2025 | Saltz AaronCHIEF LEGAL OFFICER · O | ▼ Sale | 12,403 | $26.07 | $323K | -5.1% | — |
| Aug 27, 2025 | Evans Katie SeitzPresident, Operations · O | ▼ Sale | 21,509 | $25.52 | $549K | -5.2% | — |
| Aug 26, 2025 | Yu DianeD | ▼ Sale | 20,000 | $25.23 | $505K | -22.9% | — |
| Aug 25, 2025 | Caine PaulD | ▼ Sale | 7,500 | $25 | $188K | -4.2% | plan |
| Aug 25, 2025 | Evans Katie SeitzPresident, Operations · O | ▼ Sale | 8,345 | $26 | $217K | -2% | plan |
| Aug 19, 2025 | Buckley Sean PatrickPresident, Revenue · O | ▼ Sale | 20,201 | $23.65 | $478K | -5.8% | plan · 2 tranches |
| Aug 19, 2025 | Soroca Adam LeeCHIEF PRODUCT OFFICER · O | ▼ Sale | 20,279 | $23.65 | $480K | -5.5% | plan · 2 tranches |
| Aug 18, 2025 | Day DavidCHIEF FINANCIAL OFFICER · O | ▼ Sale | 13,366 | $23.85 | $319K | -3.4% | — |
| Aug 18, 2025 | Evans Katie SeitzPresident, Operations · O | ▼ Sale | 10,487 | $23.85 | $250K | -2.4% | — |
| Aug 18, 2025 | Saltz AaronCHIEF LEGAL OFFICER · O | ▼ Sale | 5,770 | $23.85 | $138K | -2.3% | — |
| Aug 18, 2025 | Buonasera DavidCHIEF TECHNOLOGY OFFICER · O | ▼ Sale | 7,834 | $23.85 | $187K | -3.1% | — |
Every $MGNI filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Magnite filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $MGNI feed.