Magnite, Inc.
MGNI- Exchange
- Nasdaq
- Industry
- Services-Computer Programming, Data Processing, Etc.
- SEC CIK
- 0001595974
In the last 90 days, Magnite, Inc. insiders filed 0 open-market purchases and 26 sales; 311 institutions reported holding it in 13F filings for Q2 2026, worth $2.69B in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Magnite, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 316
- +31 vs. Q2 2025
- Shares held
- 138.0M
- −8.85M (−6.0%) vs. Q2 2025
- Total value
- $3.00B
- −$536.4M (−15.2%) vs. Q2 2025
- New holders
- 71
- 83 more added
- Sold out
- 40
- 124 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MGNI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 311 | $2.69B |
| Q1 2026 | 297 | $1.56B |
| Q4 2025 | 304 | $2.22B |
| Q3 2025 | 316 | $3.00B |
| Q2 2025 | 287 | $3.54B |
| Q1 2025 | 293 | $1.52B |
| Q4 2024 | 286 | $1.97B |
| Q3 2024 | 280 | $1.65B |
| Q2 2024 | 269 | $1.39B |
| Q1 2024 | 232 | $1.10B |
| Q4 2023 | 217 | $959.0M |
| Q3 2023 | 215 | $780.6M |
| Q2 2023 | 224 | $1.39B |
| Q1 2023 | 224 | $892.4M |
| Q4 2022 | 231 | $988.1M |
| Q3 2022 | 218 | $679.0M |
| Q2 2022 | 231 | $781.6M |
| Q1 2022 | 231 | $1.17B |
| Q4 2021 | 248 | $1.57B |
| Q3 2021 | 279 | $2.52B |
| Q2 2021 | 268 | $2.89B |
| Q1 2021 | 280 | $3.59B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Magnite, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 17,141,014 | $373.3M | 0.02% | −44,925−0.3% | Reduced |
| Vanguard Group Inc | 14,654,432 | $319.2M | 0.00% | +1,092,147+8.1% | Added |
| BlackRock, Inc. | 11,413,155 | $248.6M | 0.00% | +715,111+6.7% | Added |
| Capital Research Global Investors | 6,982,861 | $152.1M | 0.03% | −5,937,209−46.0% | Reduced |
| Wellington Management Group LLP | 5,144,549 | $112.0M | 0.02% | −303,288−5.6% | Reduced |
| American Century Companies Inc | 4,594,070 | $100.1M | 0.05% | −235,127−4.9% | Reduced |
| Boston Partners | 4,449,004 | $95.2M | 0.10% | −1,125,600−20.2% | Reduced |
| Granahan Investment Management Inc | 3,873,179 | $84.4M | 3.45% | +230,393+6.3% | Added |
| Dimensional Fund Advisors LP | 3,567,254 | $77.7M | 0.02% | −1,334,579−27.2% | Reduced |
| Geode Capital Management, LLC | 3,399,093 | $74.0M | 0.00% | +182,251+5.7% | Added |
| State Street Corp | 3,126,790 | $68.1M | 0.00% | +73,183+2.4% | Added |
| Nuveen, LLC | 3,092,036 | $67.3M | 0.02% | −159,056−4.9% | Reduced |
| Nine Ten Capital Management LLC | 2,858,583 | $62.3M | 16.05% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 2,547,505 | $55.5M | 0.01% | +2,429,904+2,066.2% | Added |
| Goldman Sachs Group Inc | 2,385,439 | $52.0M | 0.01% | +470,039+24.5% | Added |
| Edenbrook Capital, LLC | 2,110,370 | $46.0M | 23.36% | −1,499,602−41.5% | Reduced |
| Morgan Stanley | 2,046,237 | $44.6M | 0.00% | +875,682+74.8% | Added |
| Blue Grotto Capital, LLC | 1,548,796 | $33.7M | 3.91% | +1,263,992+443.8% | Added |
| Driehaus Capital Management LLC | 1,516,296 | $33.0M | 0.24% | −1,265,882−45.5% | Reduced |
| Northern Trust Corp | 1,365,056 | $29.7M | 0.00% | +25,185+1.9% | Added |
| Nomura Asset Management Co Ltd | 1,339,765 | $29.2M | 0.08% | −400,976−23.0% | Reduced |
| Bank of New York Mellon Corp | 1,261,893 | $27.5M | 0.00% | −536,347−29.8% | Reduced |
| Charles Schwab Investment Management Inc | 1,217,848 | $26.5M | 0.00% | +78,307+6.9% | Added |
| Kennedy Capital Management, Inc. | 1,213,613 | $26.4M | 0.58% | +344,466+39.6% | Added |
| JPMorgan Chase & Co | 1,209,413 | $26.3M | 0.00% | +271,325+28.9% | Added |
| Maestria Partners LLC | 1,141,171 | $24.9M | 7.86% | −293,146−20.4% | Reduced |
| Frontier Capital Management Co LLC | 1,093,233 | $23.8M | 0.21% | −700,597−39.1% | Reduced |
| Jane Street Group, LLC | 1,090,623 | $23.8M | 0.03% | +806,333+283.6% | Added |
| J. Goldman & Co LP | 1,028,698 | $22.4M | 0.85% | +425,015+70.4% | Added |
| Royce & Associates LP | 976,151 | $21.3M | 0.21% | −101,755−9.4% | Reduced |
| Stephens Investment Management Group LLC | 964,543 | $21.0M | 0.27% | −385,553−28.6% | Reduced |
| T. Rowe Price Investment Management, Inc. | 890,918 | $19.4M | 0.01% | +890,918 | New |
| Apis Capital Advisors, LLC | 839,399 | $18.3M | 4.04% | −208,601−19.9% | Reduced |
| Bank of America Corp | 796,244 | $17.3M | 0.00% | +382,819+92.6% | Added |
| Penn Capital Management Co Inc | 713,933 | $15.6M | 1.20% | −33,901−4.5% | Reduced |
| Millennium Management LLC | 676,349 | $14.7M | 0.01% | +676,349 | New |
| 325 Capital LLC | 650,061 | $14.2M | 4.30% | +650,061 | New |
| Meros Investment Management, LP | 613,828 | $13.4M | 5.71% | −88,314−12.6% | Reduced |
| Susquehanna International Group, LLP | 612,985 | $13.4M | 0.02% | +248,453+68.2% | Added |
| First Eagle Investment Management, LLC | 575,443 | $12.5M | 0.02% | −42,676−6.9% | Reduced |
| Silvercrest Asset Management Group LLC | 524,897 | $11.4M | 0.08% | −279,350−34.7% | Reduced |
| Oberweis Asset Management Inc | 514,000 | $11.2M | 0.43% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 474,457 | $10.3M | 0.01% | −18,768−3.8% | Reduced |
| King Luther Capital Management Corp | 449,960 | $9.80M | 0.04% | −110,826−19.8% | Reduced |
| Tudor Investment Corp Et Al | 449,109 | $9.78M | 0.06% | +449,109 | New |
| Nordea Investment Management AB | 447,340 | $9.69M | 0.01% | +116,423+35.2% | Added |
| Norwood Investment Partners, LP | 430,000 | $9.37M | 8.05% | −32,000−6.9% | Reduced |
| UBS Group AG | 425,277 | $9.26M | 0.00% | −1,307,941−75.5% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 413,150 | $9.00M | 0.01% | −201,167−32.7% | Reduced |
| Dana Investment Advisors, Inc. | 409,121 | $8.91M | 0.26% | −176,794−30.2% | Reduced |
| Grizzlyrock Capital, LLC | 390,906 | $8.51M | 6.61% | −583,417−59.9% | Reduced |
| Picton Mahoney Asset Management | 387,332 | $8.44M | 0.11% | +259,482+203.0% | Added |
| Voloridge Investment Management, LLC | 375,212 | $8.17M | 0.03% | +375,212 | New |
| Manatuck Hill Partners, LLC | 349,291 | $7.61M | 2.59% | +40,800+13.2% | Added |
| 1492 Capital Management LLC | 336,666 | $7.33M | 2.97% | +14,745+4.6% | Added |
| UBS Asset Management Americas Inc | 321,187 | $7.00M | 0.00% | −222,090−40.9% | Reduced |
| Raymond James Financial Inc | 310,653 | $6.77M | 0.00% | −82,948−21.1% | Reduced |
| Russell Investments Group, Ltd. | 309,604 | $6.74M | 0.01% | −12,596−3.9% | Reduced |
| Point72 Asset Management, L.P. | 305,316 | $6.65M | 0.01% | +305,316 | New |
| First Trust Advisors LP | 304,887 | $6.64M | 0.00% | +235,388+338.7% | Added |
| Two Sigma Investments, LP | 300,431 | $6.54M | 0.01% | +62,605+26.3% | Added |
| Swiss National Bank | 272,600 | $5.94M | 0.00% | 00.0% | Unchanged |
| S Squared Technology, LLC | 267,862 | $5.83M | 2.22% | −38,759−12.6% | Reduced |
| Cannell Capital LLC | 265,152 | $5.78M | 1.52% | +138,574+109.5% | Added |
| Invesco Ltd. | 258,732 | $5.64M | 0.00% | +28,439+12.3% | Added |
| Alta Park Capital, LP | 255,698 | $5.57M | 0.56% | −157,904−38.2% | Reduced |
| Kopion Asset Management, LLC | 246,601 | $5.37M | 3.48% | −176,577−41.7% | Reduced |
| Dilation Capital Management LP | 245,900 | $5.36M | 2.65% | −88,825−26.5% | Reduced |
| Bank of Montreal | 241,332 | $5.26M | 0.00% | −1,014−0.4% | Reduced |
| EAM Investors, LLC | 241,943 | $5.18M | 0.59% | +24,465+11.2% | Added |
| Rhumbline Advisers | 217,307 | $4.73M | 0.00% | −6,119−2.7% | Reduced |
| Polar Asset Management Partners Inc. | 213,866 | $4.66M | 0.09% | +213,866 | New |
| Commonwealth Equity Services, LLC | 212,318 | $4.62M | 0.01% | +17,338+8.9% | Added |
| D. E. Shaw & Co., Inc. | 211,433 | $4.61M | 0.00% | +179,486+561.8% | Added |
| Barclays PLC | 210,655 | $4.59M | 0.00% | −63,538−23.2% | Reduced |
| Qube Research & Technologies Ltd | 208,938 | $4.55M | 0.01% | +208,938 | New |
| State of Wisconsin Investment Board | 206,905 | $4.51M | 0.01% | +20,911+11.2% | Added |
| AYAL Capital Advisors Ltd | 199,000 | $4.33M | 2.50% | +33,063+19.9% | Added |
| Moody National Bank Trust Division | 197,792 | $4.31M | 0.36% | +36,460+22.6% | Added |
| Castleark Management LLC | 193,185 | $4.21M | 0.12% | +50,035+35.0% | Added |
| Lisanti Capital Growth, LLC | 189,168 | $4.12M | 1.01% | −178,847−48.6% | Reduced |
| Voya Investment Management LLC | 188,092 | $4.10M | 0.00% | −41,536−18.1% | Reduced |
| Harbor Capital Advisors, Inc. | 172,171 | $3.75M | 0.29% | −461,976−72.8% | Reduced |
| Envestnet Asset Management Inc | 170,152 | $3.71M | 0.00% | −71,786−29.7% | Reduced |
| Citadel Advisors LLC | 169,561 | $3.69M | 0.00% | −665,541−79.7% | Reduced |
| Squarepoint Ops LLC | 166,469 | $3.63M | 0.01% | +166,469 | New |
| Citigroup Inc | 163,343 | $3.56M | 0.00% | −75,149−31.5% | Reduced |
| Principal Financial Group Inc | 162,440 | $3.54M | 0.00% | +55,425+51.8% | Added |
| Advantage Alpha Capital Partners LP | 160,447 | $3.49M | 1.05% | −182,128−53.2% | Reduced |
| Legal & General Group Plc | 160,437 | $3.49M | 0.00% | +5,212+3.4% | Added |
| Ameriprise Financial Inc | 150,495 | $3.28M | 0.00% | +44,231+41.6% | Added |
| EFG Asset Management (North America) Corp. | 150,511 | $3.28M | 0.42% | −50,491−25.1% | Reduced |
| Bridgewater Associates, LP | 145,671 | $3.17M | 0.01% | +145,671 | New |
| Alliancebernstein L.P. | 144,645 | $3.15M | 0.00% | +7,700+5.6% | Added |
| Hilton Capital Management, LLC | 141,058 | $3.07M | 0.25% | +7,492+5.6% | Added |
| Wells Fargo & Company | 137,721 | $3.00M | 0.00% | +26,324+23.6% | Added |
| Rice Hall James & Associates, LLC | 133,218 | $2.90M | 0.16% | −21,679−14.0% | Reduced |
| Campbell & CO Investment Adviser LLC | 132,785 | $2.89M | 0.22% | +132,785 | New |
| California State Teachers Retirement System | 132,581 | $2.89M | 0.00% | +60.0% | Added |
| Perkins Capital Management Inc | 131,275 | $2.86M | 2.52% | −3,850−2.8% | Reduced |