MGNI insider trades & Congress trades
Magnite, Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 28 open-market insider transactions in Magnite, Inc. (MGNI) (0 purchases with code P and 28 sales with code S), the most recent on October 12, 2026.
In the last 90 days: 0 purchases by 0 insiders ($0) and 20 sales by 10 ($6.62M).
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Oct 12, 2026 | Caine Paul | – | Sell | 12,500 | $25.29 | $316K | – |
| Sep 17, 2026 | Knopper Douglas S | – | Sell | 37,337 | $26.28 | $981K | −0.1% |
| Sep 17, 2026 | Caine Paul | – | Sell | 7,500 | $26.50 | $199K | −0.1% |
| Sep 14, 2026 | Spillane Robert F | – | Sell | 10,363 | $23.76 | $246K | +0.0% |
| Sep 14, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1,165 | $24.00 | $28K | +0.0% |
| Sep 11, 2026 | Evans Katie Seitz | See Remarks | Sell | 13,997 | $24.00 | $336K | – |
| Sep 10, 2026 | Caine Paul | – | Sell | 5,000 | $23.53 | $118K | +0.1% |
| Sep 10, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | Sell | 40,000 | $23.41 | $936K | +0.1% |
| Sep 9, 2026 | Evans Katie Seitz | See Remarks | Sell | 11,100 | $23.46 | $260K | +0.1% |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | Sell | 32,285 | $23.63 | $763K | +0.1% |
| Sep 2, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1,043 | $25.00 | $26K | +0.0% |
| Sep 1, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 5,371 | $23.42 | $126K | +0.0% |
| Aug 28, 2026 | Harden Sarah Patricia | – | Sell | 18,436 | $24.00 | $442K | +0.0% |
| Aug 26, 2026 | Harden Sarah Patricia | – | Sell | 30,550 | $23.31 | $712K | +0.0% |
| Aug 18, 2026 | Buckley Sean Patrick | See Remarks | Sell | 2,759 | $25.00 | $69K | +0.0% |
| Aug 17, 2026 | Buckley Sean Patrick | See Remarks | Sell | 8,271 | $24.31 | $201K | +0.0% |
| Aug 14, 2026 | Caine Paul | – | Sell | 7,500 | $25.00 | $188K | +0.0% |
| Aug 10, 2026 | Caine Paul | – | Sell | 5,000 | $24.35 | $122K | −0.0% |
| Aug 10, 2026 | Lam Rachel | – | Sell | 10,000 | $24.16 | $242K | −0.0% |
| Aug 10, 2026 | Gephart Brian | CHIEF FINANCIAL OFFICER | Sell | 12,479 | $24.68 | $308K | −0.0% |
| Aug 6, 2026 | Barrett Michael G. | CEO | Sell | 293,968 | $22.72 | $6.68M | −0.0% |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | Sell | 20,000 | $24.00 | $480K | −0.0% |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 4,176 | $22.81 | $95K | −0.0% |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 2,602 | $24.00 | $62K | −0.0% |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 871 | $25.00 | $22K | −0.0% |
| Aug 6, 2026 | Knopper Douglas S | – | Sell | 37,337 | $22.72 | $848K | −0.0% |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | Sell | 47,942 | $25.09 | $1.20M | −0.0% |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | Sell | 19,237 | $23.00 | $442K | −0.0% |
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
See these filings as they land
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