MagniteMGNI
13F holders, Q4 2025 (December 31)304holders −12
46new positions
53sold out
6famous investors
$16.23avg. 13F price*
At the end of Q4 2025, 304 institutions reported holding Magnite Inc. (MGNI) in their 13F filings, down 12 from Q3 2025. 46 opened new positions and 53 sold out. The largest holders were Vanguard Group Inc. ($240.2M), Capital Research Global Investors ($209.7M) and BlackRock, Inc. ($188.2M). 6 famous investors held it, including Ray Dalio (0.0% of Bridgewater Associates's portfolio), Mario Gabelli (0.0% of GAMCO Investors's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Magnite Inc.
- CUSIP
- 55955D100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 46 | $110.8M |
| Exits | 53 | $135.8M |
All 13F filers, Q3 2025 → Q4 2025: 25,222,192 shares bought and 26,874,330 shares sold, net −1,652,138 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 304 holders
| Vanguard Group Inc. | 0.00% | Add +1.0% | 14,802,630 | $240.2M |
| Capital Research Global Investors | 0.04% | Add +85.0% | 12,920,289 | $209.7M |
| BlackRock, Inc. | 0.00% | Add +1.6% | 11,593,249 | $188.2M |
| Wellington Management Group LLP | 0.02% | Add +67.7% | 8,629,238 | $140.1M |
| FMR LLC | 0.01% | Reduce -60.9% | 6,701,174 | $108.8M |
| American Century Companies Inc. | 0.04% | Add +15.1% | 5,286,928 | $85.8M |
| Boston Partners | 0.07% | Reduce -7.6% | 4,108,893 | $66.6M |
| Dimensional Fund Advisors LP | 0.01% | Add +1.4% | 3,615,820 | $58.7M |
| Nuveen, LLC | 0.01% | Add +14.2% | 3,531,108 | $57.3M |
| Geode Capital Management, LLC | 0.00% | Add +1.0% | 3,434,062 | $55.7M |
| State Street Corp. | 0.00% | Add +0.5% | 3,141,991 | $51.0M |
| Granahan Investment Management, LLC | 2.17% | Reduce -19.6% | 3,115,930 | $50.6M |
| Nine Ten Capital Management LLC | 15.43% | Add +5.1% | 3,003,583 | $48.7M |
| Edenbrook Capital, LLC | 19.10% | Add +32.1% | 2,788,036 | $45.2M |
| Ophir Asset Management Pty Ltd | 4.34% | New | 2,384,187 | $38.7M |
| 325 Capital LLC | 11.40% | Add +208.5% | 2,005,387 | $32.5M |
| Morgan Stanley | 0.00% | Reduce -9.0% | 1,862,538 | $30.2M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -26.2% | 1,761,037 | $28.6M |
| Blue Grotto Capital, LLC | 2.72% | Add +5.2% | 1,628,782 | $26.4M |
| No Street GP LP | 1.61% | New | 1,475,000 | $23.9M |
| Kennedy Capital Management LLC | 0.49% | Add +18.3% | 1,435,970 | $23.3M |
| Maestria Partners LLC | 6.48% | Add +19.5% | 1,363,505 | $22.1M |
| Northern Trust Corp. | 0.00% | Reduce -6.8% | 1,272,068 | $20.6M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -2.5% | 1,187,501 | $19.3M |
| Bank of New York Mellon Corp | 0.00% | Reduce -6.2% | 1,183,318 | $19.2M |
| Royce & Associates LP | 0.19% | Add +19.5% | 1,166,469 | $18.9M |
| Stephens Investment Management Group LLC | 0.24% | Add +17.0% | 1,128,578 | $18.3M |
| Frontier Capital Management Co. LLC | 0.16% | Reduce -13.6% | 944,701 | $15.3M |
| Balyasny Asset Management L.P. | 0.03% | New | 873,208 | $14.2M |
| Meros Investment Management, LP | 5.31% | Add +34.5% | 825,595 | $13.4M |
| J. Goldman & Co LP | 0.49% | Reduce -23.9% | 782,837 | $12.7M |
| Schonfeld Strategic Advisors LLC | 0.06% | New | 779,681 | $12.7M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -72.1% | 711,495 | $11.5M |
| Penn Capital Management Company, LLC | 0.90% | Reduce -2.7% | 694,766 | $11.3M |
| Silvercrest Asset Management Group LLC | 0.08% | Add +30.6% | 685,259 | $11.1M |
| Bank of America Corp. | 0.00% | Reduce -18.1% | 651,953 | $10.6M |
| Oberweis Asset Management Inc./ | 0.38% | Add +23.7% | 635,800 | $10.3M |
| Nomura Asset Management Co. Ltd. | 0.03% | Reduce -53.5% | 622,700 | $10.1M |
| Kopion Asset Management, LLC | 7.13% | Add +149.2% | 614,459 | $10.0M |
| Apis Capital Advisors, LLC | 1.71% | Reduce -28.0% | 604,000 | $9.8M |
| Pillsbury Lake Capital LLC | 3.86% | — | 583,644 | $9.5M |
| Grizzlyrock Capital, LLC | 6.95% | Add +46.3% | 571,906 | $9.3M |
| Citadel Advisors | 0.01% | Add +221.0% | 544,318 | $8.8M |
| King Luther Capital Management Corp. | 0.03% | Add +14.6% | 515,635 | $8.4M |
| Algert Global LLC | 0.13% | Add +978.6% | 509,860 | $8.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -58.1% | 506,393 | $8.2M |
| New York State Common Retirement Fund | 0.01% | No change | 474,457 | $7.7M |
| Nordea Investment Management AB | 0.01% | Reduce -0.5% | 445,016 | $7.3M |
| Russell Investments Group, Ltd. | 0.01% | Add +45.7% | 451,021 | $7.3M |
| UBS Group AG | 0.00% | Reduce -5.0% | 404,014 | $6.6M |
| S Squared Technology, LLC | 2.53% | Add +50.4% | 402,862 | $6.5M |
| Picton Mahoney Asset Management | 0.07% | Add +0.2% | 388,131 | $6.3M |
| Jane Street Group, LLC | 0.01% | Reduce -65.1% | 380,253 | $6.2M |
| Barclays PLC | 0.00% | Add +73.9% | 366,390 | $5.9M |
| Two Sigma Investments, LP | 0.01% | Add +21.0% | 363,412 | $5.9M |
| Manatuck Hill Partners, LLC | 1.99% | Add +0.2% | 350,000 | $5.7M |
| 1492 Capital Management LLC | 2.18% | Add +1.4% | 341,398 | $5.5M |
| Norwood Investment Partners, LP | 6.03% | Reduce -23.3% | 330,000 | $5.4M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +2.2% | 328,260 | $5.3M |
| Man Group plc | 0.01% | New | 311,536 | $5.1M |
| Susquehanna International Group, LLP | 0.01% | Reduce -49.8% | 307,607 | $5.0M |
| Raymond James Financial Inc. | 0.00% | Reduce -4.2% | 297,716 | $4.8M |
| First Eagle Investment Management, LLC | 0.01% | Reduce -48.5% | 296,443 | $4.8M |
| Swiss National Bank | 0.00% | Add +3.0% | 280,700 | $4.6M |
| Bank of Montreal | 0.00% | Add +14.5% | 276,273 | $4.5M |
| Simplex Trading, LLC | 0.12% | Add +125.0% | 263,362 | $4.3M |
| Dana Investment Advisors, Inc. | 0.12% | Reduce -37.7% | 254,935 | $4.1M |
| Commonwealth Equity Services, LLC | 0.01% | Add +19.8% | 254,318 | $4.1M |
| Invesco Ltd. | 0.00% | Reduce -5.9% | 243,565 | $4.0M |
| Principal Financial Group Inc. | 0.00% | Add +46.0% | 237,220 | $3.9M |
| Senvest Management, LLC | 0.11% | New | 224,100 | $3.6M |
| Voya Investment Management LLC | 0.00% | Add +17.2% | 220,440 | $3.6M |
| State of Wisconsin Investment Board | 0.01% | Add +6.1% | 219,559 | $3.6M |
| Harbor Capital Advisors, Inc. | 0.27% | Add +24.4% | 214,251 | $3.5M |
| Sei Investments Co. | 0.00% | Add +182.1% | 211,537 | $3.4M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -2.9% | 202,936 | $3.3M |
| AYAL Capital Advisors Ltd | 1.78% | Add +0.5% | 200,000 | $3.2M |
| First Trust Advisors LP | 0.00% | Reduce -34.4% | 199,872 | $3.2M |
| Rice Hall James & Associates, LLC | 0.18% | Add +49.3% | 198,828 | $3.2M |
| Wells Fargo & Company | 0.00% | Add +40.6% | 193,619 | $3.1M |
| Wedge Capital Management L L P | 0.06% | Add +45.2% | 189,903 | $3.1M |
| Rhumbline Advisers | 0.00% | Reduce -15.3% | 183,945 | $3.0M |
| Hilton Capital Management, LLC | 0.22% | Add +27.9% | 180,473 | $2.9M |
| Federated Hermes, Inc. | 0.00% | Add +648.7% | 172,947 | $2.8M |
| CenterBook Partners LP | 0.14% | Add +137.1% | 172,546 | $2.8M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -3.6% | 163,954 | $2.7M |
| Prelude Capital Management, LLC | 0.18% | Add +33.9% | 152,200 | $2.5M |
| Victory Capital Management Inc. | 0.00% | Add +226.3% | 151,084 | $2.5M |
| Legal & General Group Plc | 0.00% | Reduce -7.2% | 148,841 | $2.4M |
| Bridgewater Associates | 0.01% | Reduce -0.3% | 145,187 | $2.4M |
| P.A.W. Capital Corp. | 5.16% | Add +40.0% | 140,000 | $2.3M |
| California State Teachers Retirement System | 0.00% | Add +3.0% | 136,524 | $2.2M |
| IMC-Chicago, LLC | 0.04% | New | 133,096 | $2.2M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Reduce -68.6% | 129,787 | $2.1M |
| Deutsche Bank AG | 0.00% | Reduce -0.9% | 128,468 | $2.1M |
| Alliancebernstein L.P. | 0.00% | Reduce -13.3% | 125,345 | $2.0M |
| Tidal Investments LLC | 0.01% | Add +25.1% | 123,908 | $2.0M |
| Perkins Capital Management Inc. | 1.57% | Reduce -7.2% | 121,775 | $2.0M |
| Boothbay Fund Management, LLC | 0.05% | Add +100.2% | 117,842 | $1.9M |
| LPL Financial LLC | 0.00% | Add +6.0% | 116,450 | $1.9M |
"% of holder's portfolio" is MGNI's weight in each manager's 13F, not the share of Magnite Inc. the manager owns.