Insider activity at Magnite, Inc. has been all selling for a year now: about $26.7 million from 13 sellers, and zero buyers at market prices.
Keep in mind most insider selling is routine — stock-based pay has to be converted to cash at some point.
On the institutional side, 310 funds reported holding MGNI at the end of Q2 2026, and more funds bought than sold. Zooming out by quarter: 7 quarters in a row of net selling by insiders. Insiders bought in 0 of the last 7 full quarters.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Sep 18, 2026 | Knopper Douglas S | Director | Sell | 37,337 | $26.28 | $981K | SEC |
| Sep 18, 2026 | Caine Paul | Director | Sell | 7,500 | $26.50 | $199K | SEC |
| Sep 16, 2026 | Buonasera David | Executive Officer | Sell | 1,165 | $24.00 | $28K | SEC |
| Sep 16, 2026 | Spillane Robert F | Director | Sell | 10,363 | $23.76 | $246K | SEC |
| Sep 11, 2026 | Evans Katie Seitz | Officer | Sell | 13,997 | $24.00 | $336K | SEC |
| Sep 11, 2026 | Saltz Aaron | Executive Officer | Sell | 40,000 | $23.41 | $936K | SEC |
| Sep 11, 2026 | Caine Paul | Director | Sell | 5,000 | $23.53 | $118K | SEC |
| Sep 10, 2026 | Evans Katie Seitz | Officer | Sell | 11,100 | $23.46 | $260K | SEC |
| Sep 10, 2026 | Evans Katie Seitz | Officer | Sell | 32,285 | $23.63 | $763K | SEC |
| Sep 3, 2026 | Buonasera David | Executive Officer | Sell | 5,371 | $23.42 | $126K | SEC |
| Sep 3, 2026 | Buonasera David | Executive Officer | Sell | 1,043 | $25.00 | $26K | SEC |
| Aug 28, 2026 | Harden Sarah Patricia | Director | Sell | 30,550 | $23.31 | $712K | SEC |
| Aug 28, 2026 | Harden Sarah Patricia | Director | Sell | 18,436 | $24.00 | $442K | SEC |
| Aug 18, 2026 | Caine Paul | Director | Sell | 7,500 | $25.00 | $188K | SEC |
| Aug 18, 2026 | Buckley Sean Patrick | Officer | Sell | 8,271 | $24.31 | $201K | SEC |
In the last 12 months Magnite, Inc. insiders made open-market purchases worth about $0 and sales worth about $26.7 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in MGNI was filed on 2026-09-18.
310 investment managers reported holding MGNI in SEC Form 13F filings for Q2 2026.
No congressional trades in MGNI were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).