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MagniteMGNI · Communication Services
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Market cap$3.9B
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Magnite (MGNI) Superinvestor holders
13 of the superinvestors we track hold Magnite (MGNI) in their latest 13F filings, $162M in total.
Summary
The largest holder is Mark Donovan (Boston Partners), with $96M, 0.1% of the portfolio.
In their latest quarter: 1 opened a new position, 6 added, 4 trimmed.
Who holds it
Each investor's latest 13F filing, largest stake first. What a 13F shows.
| Investor | Last change | Shares | Value | % of portfolio | Filed for |
|---|---|---|---|---|---|
| Mark Donovan Boston Partners |
Added | 5,013,835 | $96M | 0.1% | Q2 2026 |
| Chuck Royce Royce Investment Partners |
Trimmed | 1,162,298 | $29M | 0.3% | Q3 2026 |
| Jean-Marie Eveillard First Eagle Investment Management |
Added | 670,788 | $13M | 0.0% | Q2 2026 |
| Paul Marshall Marshall Wace |
Added | 341,864 | $6M | 0.0% | Q2 2026 |
| James Roumell Roumell Asset Management |
Added | 387,766 | $5M | 9.7% | Q2 2024 |
| Richard Mashaal Senvest Management |
Held | 224,100 | $4M | 0.1% | Q2 2026 |
| Cliff Asness AQR Capital Management |
Added | 176,599 | $3M | 0.0% | Q2 2026 |
| Mario Gabelli GAMCO Investors |
Added | 63,101 | $1M | 0.0% | Q2 2026 |
| Man Group Man Group plc |
Trimmed | 53,054 | $1M | 0.0% | Q2 2026 |
| Two Sigma Two Sigma Investments |
Trimmed | 42,659 | $809,668 | 0.0% | Q2 2026 |
| David Shaw D. E. Shaw & Co. |
New position | 35,719 | $677,947 | 0.0% | Q2 2026 |
| Acadian Acadian Asset Management |
Trimmed | 14,232 | $357,000 | 0.0% | Q3 2026 |
| Ensign Peak Ensign Peak Advisors |
Held | 13,658 | $259,229 | 0.0% | Q2 2026 |
Holders by quarter
| Quarter | Superinvestors holding it |
|---|---|
| Q2 2026 | 12 |
| Q1 2026 | 16 |
| Q4 2025 | 14 |
| Q3 2025 | 16 |
| Q2 2025 | 11 |
| Q1 2025 | 9 |
| Q4 2024 | 12 |
| Q3 2024 | 10 |
Questions about Magnite
Which superinvestors own Magnite?
13 of the superinvestors we track hold Magnite (MGNI) in their latest 13F filings, $162M in total. Mark Donovan, Chuck Royce, Jean-Marie Eveillard, Paul Marshall, James Roumell, Richard Mashaal.
Who is the largest superinvestor holder of MGNI?
The largest holder is Mark Donovan (Boston Partners), with $96M, 0.1% of the portfolio.
From Magnite's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.