StockCIK 1595974
MAGNITE, INC. (MGNI): Insider Trades and Fund Holdings
In the past 12 months, MAGNITE, INC. insiders reported 0 open-market purchases worth $0 and 17 sales worth $5.95M; 16 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$5.95MSold by insiders, 12 months
0Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 14, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 14 | Paul CaineDirector | ▼ SELL10b5-1 | $316K |
| Sep 18 | Douglas S. KnopperDirector | ▼ SELL10b5-1 | $981K |
| Sep 18 | Paul CaineDirector | ▼ SELL10b5-1 | $199K |
| Sep 16 | Robert F. SpillaneDirector | ▼ SELL | $246K |
| Sep 16 | David BuonaseraCTO | ▼ SELL10b5-1 | $28K |
| Sep 11 | Aaron SaltzGeneral Counsel | ▼ SELL10b5-1 | $936K |
| Sep 11 | Katie Seitz EvansSee Remarks | ▼ SELL10b5-1 | $336K |
| Sep 11 | Paul CaineDirector | ▼ SELL10b5-1 | $118K |
| Sep 10 | Katie Seitz EvansSee Remarks | ▼ SELL10b5-1 | $763K |
| Sep 10 | Katie Seitz EvansSee Remarks | ▼ SELL10b5-1 | $260K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
All 17 MGNI insider trades →Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Paul Caine | Director | 0 | $0 | 4 | $820K |
| Douglas S. Knopper | Director | 0 | $0 | 1 | $981K |
| Robert F. Spillane | Director | 0 | $0 | 1 | $246K |
| David Buonasera | CTO | 0 | $0 | 3 | $180K |
| Aaron Saltz | General Counsel | 0 | $0 | 1 | $936K |
| Katie Seitz Evans | See Remarks | 0 | $0 | 3 | $1.36M |
| Sarah Patricia Harden | Director | 0 | $0 | 2 | $1.15M |
| Sean Patrick Buckley | See Remarks | 0 | $0 | 2 | $270K |
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Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →