🕵️ Magnite, Inc. ($MGNI)
SEC insider & ownership activity, last 12 months · CIK 1595974 · every row links its SEC filing
Over the last 12 months insiders sold $18.9M with no open-market buying against it. Michael G. Barrett sold $7.8M through a 10b5-1 trading plan in 5 lots (Aug–Jul). 3 planned sales are pending, the largest $3.0M (Michael G Barrett). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 14 sellers, $18.9M (53 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Michael G. Barrett | 0 | – | 5 | $7.8M | Jul 15, 2026 |
| Sean Buckley | 0 | – | 8 | $2.3M | Jul 7, 2026 |
| Adam L Soroca | 0 | – | 7 | $1.8M | Feb 18, 2026 |
| Saltz Aaron | 0 | – | 5 | $1.1M | Sep 19, 2025 |
| Evans Katie Seitz | 0 | – | 3 | $1.0M | Aug 27, 2025 |
| Douglas Knopper | 0 | – | 2 | $845K | Jun 16, 2026 |
| Paul J Caine | 0 | – | 7 | $808K | Jul 10, 2026 |
| Gephart Brian | 0 | – | 2 | $754K | Sep 4, 2025 |
| Buonasera David | 0 | – | 8 | $743K | Jul 7, 2026 |
| Yu Diane | 0 | – | 1 | $505K | Aug 26, 2025 |
| Lam Rachel | 0 | – | 1 | $334K | Aug 12, 2025 |
| Day David | 0 | – | 1 | $319K | Aug 18, 2025 |
| Robert F. Spillane | 0 | – | 2 | $311K | May 19, 2026 |
| David T Pearson | 0 | – | 1 | $168K | Jun 10, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 6.0% | 13G | Feb 10, 2026 | filing ↗ | |
| Wellington Group Holdings LLP | 6.0% | 13G | Feb 10, 2026 | filing ↗ | |
| Wellington Investment Advisors Holdings LLP | 6.0% | 13G | Feb 10, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.4% | 13G | Apr 29, 2026 | filing ↗ | |
| Wellington Management Company LLP | 5.2% | 13G | Feb 10, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.0% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Michael G Barrett | $786K | Jul 15, 2026 | filing ↗ |
| Paul Caine | $318K | Jul 10, 2026 | filing ↗ |
| Sean Buckley | $401K | Jul 7, 2026 | filing ↗ |
| Adam L Soroca | $168K | Jul 7, 2026 | filing ↗ |
| David Buonasera | $26K | Jul 7, 2026 | filing ↗ |
| David Buonasera | $188K | Jul 1, 2026 | filing ↗ |
| Adam L Soroca | $160K | Jul 1, 2026 | filing ↗ |
| Michael G Barrett | $1.5M | Jun 29, 2026 | filing ↗ |
| Sean Buckley | $357K | Jun 17, 2026 | filing ↗ |
| Adam L Soroca | $152K | Jun 17, 2026 | filing ↗ |
| David Buonasera | $27K | Jun 17, 2026 | filing ↗ |
| Douglas Knopper | $625K | Jun 16, 2026 | filing ↗ |
| David Buonasera | $202K | Jun 16, 2026 | filing ↗ |
| Michael G Barrett | $1.8M | Jun 16, 2026 | filing ↗ |
| Adam L Soroca | $108K | Jun 16, 2026 | filing ↗ |
| David Buonasera | $18K | Jun 15, 2026 | filing ↗ |
| Michael G Barrett | $3.0M | Jun 15, 2026 | filing ↗ |
| Adam L Soroca | $102K | Jun 15, 2026 | filing ↗ |
| Adam L Soroca | $104K | Jun 11, 2026 | filing ↗ |
| Douglas Knopper | $170K | Jun 10, 2026 | filing ↗ |
| David T Pearson | $169K | Jun 10, 2026 | filing ↗ |
| Adam L Soroca | $105K | Jun 9, 2026 | filing ↗ |
| Adam L Soroca | $101K | Jun 3, 2026 | filing ↗ |
| Adam L Soroca | $418K | Jun 1, 2026 | filing ↗ |
| David Buonasera | $21K | Jun 1, 2026 | filing ↗ |
| Adam L Soroca | $603K | May 28, 2026 | filing ↗ |
| Adam L Soroca | $250K | May 27, 2026 | filing ↗ |
| Robert Spillane | $133K | May 19, 2026 | filing ↗ |
| Adam L Soroca | $248K | May 18, 2026 | filing ↗ |
| Adam L Soroca | $258K | Feb 18, 2026 | filing ↗ |
| Adam L Soroca | $283K | Dec 17, 2025 | filing ↗ |
| Sean P Buckley | $32K | Nov 24, 2025 | filing ↗ |
| Robert Spillane | $178K | Nov 21, 2025 | filing ↗ |
| Adam L Soroca | $144K | Nov 18, 2025 | filing ↗ |
| Sean P Buckley | $59K | Nov 18, 2025 | filing ↗ |
| Paul Caine | $179K | Sep 19, 2025 | filing ↗ |
| Aaron Saltz | $209K | Sep 19, 2025 | filing ↗ |
| Aaron Saltz | $148K | Sep 15, 2025 | filing ↗ |
| Sean Buckley | $492K | Sep 9, 2025 | filing ↗ |
| Sean Buckley | $511K | Sep 8, 2025 | filing ↗ |
| Brian Gephart | $684K | Sep 4, 2025 | filing ↗ |
| David Buonasera | $75K | Sep 3, 2025 | filing ↗ |
| Adam L Soroca | $617K | Sep 2, 2025 | filing ↗ |
| Aaron Saltz | $323K | Aug 29, 2025 | filing ↗ |
| Katheryn Evans | $549K | Aug 27, 2025 | filing ↗ |
| Diane Yu | $505K | Aug 26, 2025 | filing ↗ |
| Paul Caine | $302K | Aug 25, 2025 | filing ↗ |
| Katheryn Evans | $217K | Aug 25, 2025 | filing ↗ |
| Adam L Soroca | $248K | Aug 19, 2025 | filing ↗ |
| Sean P Buckley | $218K | Aug 19, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 8, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 20, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 20, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 7, 2026 | filing ↗ |
| Earnings (2.02) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 16, 2025 | filing ↗ |
| Other events (8.01) | Sep 16, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 16, 2025 | filing ↗ |
| Material agreement (1.01) | Aug 31, 2025 | filing ↗ |
| Earnings (2.02) | Aug 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2025 | filing ↗ |