SEC Form 4Coverage since Jun 1, 2026
$MGNI insider trading
Over the last 12 months, Magnite insiders reported no purchases and 18 sales totaling $19.2M across SEC Form 4 filings. 100% of the activity was filed under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $19.2M 18 events
- Events · 12m
- 18 Form 4 filings, grouped
- Insiders · 12m
- 7 distinct reporters
- 10b5-1 share
- 100% pre-arranged plans
Side
Price · $MGNI · 12Mvia TradingView
Top insiders · 12m
Buonasera DavidCHIEF TECHNOLOGY OFFICER5× · $661K
BARRETT MICHAEL G.CEO4× · $13.6M
Knopper Douglas S—3× · $1.7M
Buckley Sean PatrickSee Remarks3× · $2.4M
Caine Paul—1× · $103K
All insider trades
18 events
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| 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 |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. 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.