MagniteMGNI
13F holders, Q3 2025 (September 30)316holders +30
68new positions
40sold out
8famous investors
$21.77avg. 13F price*
At the end of Q3 2025, 316 institutions reported holding Magnite Inc. (MGNI) in their 13F filings, up 30 from Q2 2025. 68 opened new positions and 40 sold out. The largest holders were FMR LLC ($373.3M), Vanguard Group Inc. ($319.2M) and BlackRock, Inc. ($248.6M). 8 famous investors held it, including Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio), Steve Cohen (0.0% of Point72 Asset Management's portfolio) and Ray Dalio (0.0% of Bridgewater Associates's portfolio).
- Company
- Magnite Inc.
- CUSIP
- 55955D100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 68 | $114.5M |
| Exits | 40 | $104.8M |
All 13F filers, Q2 2025 → Q3 2025: 16,898,480 shares bought and 25,836,980 shares sold, net −8,938,500 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 316 holders
| FMR LLC | 0.02% | Reduce -0.3% | 17,141,014 | $373.3M |
| Vanguard Group Inc. | 0.00% | Add +8.1% | 14,654,432 | $319.2M |
| BlackRock, Inc. | 0.00% | Add +6.7% | 11,413,155 | $248.6M |
| Capital Research Global Investors | 0.03% | Reduce -46.0% | 6,982,861 | $152.1M |
| Wellington Management Group LLP | 0.02% | Reduce -5.6% | 5,144,549 | $112.0M |
| American Century Companies Inc. | 0.05% | Reduce -4.9% | 4,594,070 | $100.1M |
| Boston Partners | 0.10% | Reduce -20.2% | 4,449,004 | $95.2M |
| Granahan Investment Management, LLC | 3.45% | Add +6.3% | 3,873,179 | $84.4M |
| Dimensional Fund Advisors LP | 0.02% | Reduce -27.2% | 3,567,254 | $77.7M |
| Geode Capital Management, LLC | 0.00% | Add +5.7% | 3,399,093 | $74.0M |
| State Street Corp. | 0.00% | Add +2.4% | 3,126,790 | $68.1M |
| Nuveen, LLC | 0.02% | Reduce -4.9% | 3,092,036 | $67.3M |
| Nine Ten Capital Management LLC | 16.05% | No change | 2,858,583 | $62.3M |
| T. Rowe Price Associates Inc. | 0.01% | Add +2066.2% | 2,547,505 | $55.5M |
| Goldman Sachs Group Inc. | 0.01% | Add +24.5% | 2,385,439 | $52.0M |
| Edenbrook Capital, LLC | 23.36% | Reduce -41.5% | 2,110,370 | $46.0M |
| Morgan Stanley | 0.00% | Add +74.8% | 2,046,237 | $44.6M |
| Blue Grotto Capital, LLC | 3.91% | Add +443.8% | 1,548,796 | $33.7M |
| Driehaus Capital Management LLC | 0.24% | Reduce -45.5% | 1,516,296 | $33.0M |
| Northern Trust Corp. | 0.00% | Add +1.9% | 1,365,056 | $29.7M |
| Nomura Asset Management Co. Ltd. | 0.08% | Reduce -23.0% | 1,339,765 | $29.2M |
| Bank of New York Mellon Corp | 0.00% | Reduce -29.8% | 1,261,893 | $27.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +6.9% | 1,217,848 | $26.5M |
| Kennedy Capital Management LLC | 0.58% | Add +39.6% | 1,213,613 | $26.4M |
| JPMorgan Chase & Co. | 0.00% | Add +28.9% | 1,209,413 | $26.3M |
| Maestria Partners LLC | 7.86% | Reduce -20.4% | 1,141,171 | $24.9M |
| Frontier Capital Management Co. LLC | 0.21% | Reduce -39.1% | 1,093,233 | $23.8M |
| Jane Street Group, LLC | 0.03% | Add +283.6% | 1,090,623 | $23.8M |
| J. Goldman & Co LP | 0.85% | Add +70.4% | 1,028,698 | $22.4M |
| Royce & Associates LP | 0.21% | Reduce -9.4% | 976,151 | $21.3M |
| Stephens Investment Management Group LLC | 0.27% | Reduce -28.6% | 964,543 | $21.0M |
| T. Rowe Price Investment Management, Inc. | 0.01% | New | 890,918 | $19.4M |
| Apis Capital Advisors, LLC | 4.04% | Reduce -19.9% | 839,399 | $18.3M |
| Bank of America Corp. | 0.00% | Add +92.6% | 796,244 | $17.3M |
| Penn Capital Management Company, LLC | 1.20% | Reduce -4.5% | 713,933 | $15.6M |
| Millennium Management | 0.01% | New | 676,349 | $14.7M |
| 325 Capital LLC | 4.30% | New | 650,061 | $14.2M |
| Meros Investment Management, LP | 5.71% | Reduce -12.6% | 613,828 | $13.4M |
| Susquehanna International Group, LLP | 0.02% | Add +68.2% | 612,985 | $13.4M |
| First Eagle Investment Management, LLC | 0.02% | Reduce -6.9% | 575,443 | $12.5M |
| Silvercrest Asset Management Group LLC | 0.08% | Reduce -34.7% | 524,897 | $11.4M |
| Oberweis Asset Management Inc./ | 0.43% | No change | 514,000 | $11.2M |
| New York State Common Retirement Fund | 0.01% | Reduce -3.8% | 474,457 | $10.3M |
| King Luther Capital Management Corp. | 0.04% | Reduce -19.8% | 449,960 | $9.8M |
| Tudor Investment Corporation | 0.07% | New | 449,109 | $9.8M |
| Nordea Investment Management AB | 0.01% | Add +35.2% | 447,340 | $9.7M |
| Norwood Investment Partners, LP | 8.05% | Reduce -6.9% | 430,000 | $9.4M |
| UBS Group AG | 0.00% | Reduce -75.5% | 425,277 | $9.3M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.02% | Reduce -32.8% | 413,150 | $9.0M |
| Dana Investment Advisors, Inc. | 0.26% | Reduce -30.2% | 409,121 | $8.9M |
| Grizzlyrock Capital, LLC | 6.61% | Reduce -59.9% | 390,906 | $8.5M |
| Picton Mahoney Asset Management | 0.11% | Add +203.0% | 387,332 | $8.4M |
| Voloridge Investment Management, LLC | 0.03% | New | 375,212 | $8.2M |
| Manatuck Hill Partners, LLC | 2.59% | Add +13.2% | 349,291 | $7.6M |
| 1492 Capital Management LLC | 2.97% | Add +4.6% | 336,666 | $7.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -40.9% | 321,187 | $7.0M |
| Raymond James Financial Inc. | 0.00% | Reduce -21.1% | 310,653 | $6.8M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -3.9% | 309,604 | $6.7M |
| Point72 Asset Management | 0.02% | New | 305,316 | $6.6M |
| First Trust Advisors LP | 0.01% | Add +338.7% | 304,887 | $6.6M |
| Two Sigma Investments, LP | 0.01% | Add +26.3% | 300,431 | $6.5M |
| Swiss National Bank | 0.00% | No change | 272,600 | $5.9M |
| S Squared Technology, LLC | 2.22% | Reduce -12.6% | 267,862 | $5.8M |
| Cannell Capital LLC | 1.52% | Add +109.5% | 265,152 | $5.8M |
| Invesco Ltd. | 0.00% | Add +12.3% | 258,732 | $5.6M |
| Alta Park Capital, LP | 0.56% | Reduce -38.2% | 255,698 | $5.6M |
| Kopion Asset Management, LLC | 3.48% | Reduce -41.7% | 246,601 | $5.4M |
| Dilation Capital Management LP | 2.65% | Reduce -26.5% | 245,900 | $5.4M |
| Bank of Montreal | 0.00% | Reduce -0.4% | 241,332 | $5.3M |
| Informed Momentum Co LLC | 0.59% | Add +11.3% | 241,943 | $5.2M |
| Rhumbline Advisers | 0.00% | Reduce -2.7% | 217,307 | $4.7M |
| Polar Asset Management Partners Inc. | 0.14% | New | 213,866 | $4.7M |
| Commonwealth Equity Services, LLC | 0.01% | Add +8.9% | 212,318 | $4.6M |
| D. E. Shaw & Co. | 0.00% | Add +561.8% | 211,433 | $4.6M |
| Barclays PLC | 0.00% | Reduce -23.2% | 210,655 | $4.6M |
| Qube Research & Technologies Ltd | 0.01% | New | 208,938 | $4.6M |
| State of Wisconsin Investment Board | 0.01% | Add +11.2% | 206,905 | $4.5M |
| AYAL Capital Advisors Ltd | 2.50% | Add +19.9% | 199,000 | $4.3M |
| Moody National Bank Trust Division | 0.36% | Add +22.6% | 197,792 | $4.3M |
| Castleark Management LLC | 0.12% | Add +35.0% | 193,185 | $4.2M |
| Lisanti Capital Growth, LLC | 1.01% | Reduce -48.6% | 189,168 | $4.1M |
| Voya Investment Management LLC | 0.00% | Reduce -18.1% | 188,092 | $4.1M |
| Harbor Capital Advisors, Inc. | 0.29% | Reduce -72.8% | 172,171 | $3.8M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -29.7% | 170,152 | $3.7M |
| Citadel Advisors | 0.00% | Reduce -79.7% | 169,561 | $3.7M |
| Squarepoint Ops LLC | 0.01% | New | 166,469 | $3.6M |
| Citigroup Inc. | 0.00% | Reduce -31.5% | 163,343 | $3.6M |
| Principal Financial Group Inc. | 0.00% | Add +51.8% | 162,440 | $3.5M |
| Advantage Alpha Capital Partners LP | 1.05% | Reduce -53.2% | 160,447 | $3.5M |
| Legal & General Group Plc | 0.00% | Add +3.4% | 160,437 | $3.5M |
| Ameriprise Financial Inc. | 0.00% | Add +41.6% | 150,495 | $3.3M |
| EFG Asset Management (North America) Corp. | 0.42% | Reduce -25.1% | 150,511 | $3.3M |
| Bridgewater Associates | 0.01% | New | 145,671 | $3.2M |
| Alliancebernstein L.P. | 0.00% | Add +5.6% | 144,645 | $3.2M |
| Hilton Capital Management, LLC | 0.25% | Add +5.6% | 141,058 | $3.1M |
| Wells Fargo & Company | 0.00% | Add +23.6% | 137,721 | $3.0M |
| Rice Hall James & Associates, LLC | 0.16% | Reduce -14.0% | 133,218 | $2.9M |
| Campbell & CO Investment Adviser LLC | 0.22% | New | 132,785 | $2.9M |
| California State Teachers Retirement System | 0.00% | Add +0.0% | 132,581 | $2.9M |
| Perkins Capital Management Inc. | 2.52% | Reduce -2.9% | 131,275 | $2.9M |
"% of holder's portfolio" is MGNI's weight in each manager's 13F, not the share of Magnite Inc. the manager owns.