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, Q1 2026
Institutional positions in Magnite, Inc. as of Mar 31, 2026. 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
- 297
- −2 vs. Q4 2025
- Shares held
- 131.6M
- +9.78M (+8.0%) vs. Q4 2025
- Total value
- $1.56B
- −$413.1M (−20.9%) vs. Q4 2025
- New holders
- 52
- 114 more added
- Sold out
- 54
- 80 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Magnite, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11,657,496 | $138.5M | 0.00% | +64,247+0.6% | Added |
| Wellington Management Group LLP | 9,191,077 | $109.2M | 0.02% | +561,839+6.5% | Added |
| Vanguard Portfolio Management LLC | 7,726,205 | $91.8M | 0.00% | +7,726,205 | New |
| Vanguard Capital Management LLC | 6,190,403 | $73.5M | 0.00% | +6,190,403 | New |
| Capital Research Global Investors | 5,020,289 | $59.6M | 0.01% | −7,900,000−61.1% | Reduced |
| Boston Partners | 4,719,863 | $56.1M | 0.06% | +610,970+14.9% | Added |
| American Century Companies Inc | 4,626,816 | $55.0M | 0.03% | −660,112−12.5% | Reduced |
| FMR LLC | 4,507,419 | $53.5M | 0.00% | −2,193,755−32.7% | Reduced |
| Dimensional Fund Advisors LP | 3,983,674 | $47.3M | 0.01% | +367,854+10.2% | Added |
| Nuveen, LLC | 3,590,025 | $42.6M | 0.01% | +58,917+1.7% | Added |
| Geode Capital Management, LLC | 3,553,790 | $42.2M | 0.00% | +119,728+3.5% | Added |
| Nine Ten Capital Management LLC | 3,481,283 | $41.4M | 13.14% | +477,700+15.9% | Added |
| State Street Corp | 3,163,139 | $37.6M | 0.00% | +21,148+0.7% | Added |
| Edenbrook Capital, LLC | 2,798,036 | $33.2M | 17.00% | +10,000+0.4% | Added |
| Granahan Investment Management Inc | 2,553,413 | $30.3M | 1.47% | −562,517−18.1% | Reduced |
| Ophir Asset Management Pty Ltd | 2,118,016 | $25.2M | 2.93% | −266,171−11.2% | Reduced |
| 325 Capital LLC | 2,005,387 | $23.8M | 8.68% | 00.0% | Unchanged |
| Kennedy Capital Management, Inc. | 1,753,542 | $20.8M | 0.44% | +317,572+22.1% | Added |
| Jane Street Group, LLC | 1,668,160 | $19.8M | 0.02% | +1,287,907+338.7% | Added |
| No Street GP LP | 1,628,248 | $19.3M | 1.29% | +153,248+10.4% | Added |
| Schonfeld Strategic Advisors LLC | 1,605,041 | $19.1M | 0.16% | +825,360+105.9% | Added |
| Goldman Sachs Group Inc | 1,500,852 | $17.8M | 0.00% | −260,185−14.8% | Reduced |
| Balyasny Asset Management LLC | 1,500,443 | $17.8M | 0.04% | +627,235+71.8% | Added |
| Royce & Associates LP | 1,365,489 | $16.2M | 0.16% | +199,020+17.1% | Added |
| Maestria Partners LLC | 1,363,505 | $16.2M | 5.91% | 00.0% | Unchanged |
| Blue Grotto Capital, LLC | 1,328,782 | $15.8M | 1.82% | −300,000−18.4% | Reduced |
| Northern Trust Corp | 1,322,571 | $15.7M | 0.00% | +50,503+4.0% | Added |
| Victory Capital Management Inc | 1,266,522 | $15.0M | 0.01% | +1,115,438+738.3% | Added |
| Grizzlyrock Capital, LLC | 1,238,680 | $14.7M | 11.65% | +666,774+116.6% | Added |
| Millennium Management LLC | 1,234,457 | $14.7M | 0.01% | +1,210,713+5,099.0% | Added |
| Charles Schwab Investment Management Inc | 1,180,431 | $14.0M | 0.00% | −7,070−0.6% | Reduced |
| Bank of New York Mellon Corp | 1,138,217 | $13.5M | 0.00% | −45,101−3.8% | Reduced |
| Bank of America Corp | 1,125,196 | $13.4M | 0.00% | +473,243+72.6% | Added |
| Citadel Advisors LLC | 1,052,908 | $12.5M | 0.01% | +508,590+93.4% | Added |
| Vanguard Fiduciary Trust Co | 997,082 | $11.8M | 0.00% | +997,082 | New |
| Meros Investment Management, LP | 992,351 | $11.8M | 5.11% | +166,756+20.2% | Added |
| Morgan Stanley | 926,819 | $11.0M | 0.00% | −935,719−50.2% | Reduced |
| Kopion Asset Management, LLC | 855,904 | $10.2M | 7.91% | +241,445+39.3% | Added |
| Man Group plc | 663,957 | $7.89M | 0.02% | +352,421+113.1% | Added |
| Qube Research & Technologies Ltd | 661,057 | $7.85M | 0.01% | +458,121+225.7% | Added |
| Oberweis Asset Management Inc | 647,600 | $7.69M | 0.23% | +11,800+1.9% | Added |
| Picton Mahoney Asset Management | 643,078 | $7.64M | 0.08% | +254,947+65.7% | Added |
| Silvercrest Asset Management Group LLC | 616,084 | $7.32M | 0.05% | −69,175−10.1% | Reduced |
| Park West Asset Management LLC | 598,380 | $7.11M | 0.63% | +598,380 | New |
| Nomura Asset Management Co Ltd | 593,900 | $7.06M | 0.02% | −28,800−4.6% | Reduced |
| CenterBook Partners LP | 564,156 | $6.70M | 0.36% | +391,610+227.0% | Added |
| King Luther Capital Management Corp | 531,066 | $6.31M | 0.03% | +15,431+3.0% | Added |
| Pacer Advisors, Inc. | 501,578 | $5.96M | 0.02% | +501,578 | New |
| JPMorgan Chase & Co | 486,868 | $5.63M | 0.00% | −19,525−3.9% | Reduced |
| Capital World Investors | 456,672 | $5.43M | 0.00% | +456,672 | New |
| QVT Financial LP | 453,910 | $5.39M | 0.43% | +392,617+640.6% | Added |
| UBS Group AG | 450,349 | $5.35M | 0.00% | +46,335+11.5% | Added |
| First Eagle Investment Management, LLC | 450,288 | $5.35M | 0.01% | +153,845+51.9% | Added |
| Principal Financial Group Inc | 445,950 | $5.30M | 0.00% | +208,730+88.0% | Added |
| Nordea Investment Management AB | 421,008 | $4.90M | 0.00% | −24,008−5.4% | Reduced |
| Caption Management, LLC | 405,053 | $4.81M | 0.23% | +388,853+2,400.3% | Added |
| S Squared Technology, LLC | 402,862 | $4.79M | 1.81% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 394,856 | $4.69M | 0.00% | +31,444+8.7% | Added |
| Commonwealth Equity Services, LLC | 359,570 | $4.27M | 0.01% | +105,252+41.4% | Added |
| SEI Investments Co | 350,862 | $4.17M | 0.00% | +139,325+65.9% | Added |
| 1492 Capital Management LLC | 340,542 | $4.05M | 1.54% | −856−0.3% | Reduced |
| Harbor Capital Advisors, Inc. | 325,261 | $3.86M | 0.31% | +111,010+51.8% | Added |
| UBS Asset Management Americas Inc | 323,018 | $3.84M | 0.00% | −5,242−1.6% | Reduced |
| Manatuck Hill Partners, LLC | 310,000 | $3.68M | 1.21% | −40,000−11.4% | Reduced |
| Lisanti Capital Growth, LLC | 309,440 | $3.68M | 0.93% | +309,440 | New |
| Susquehanna International Group, LLP | 307,805 | $3.66M | 0.00% | +198+0.1% | Added |
| Alliancebernstein L.P. | 223,191 | $3.62M | 0.00% | +97,846+78.1% | Added |
| Squarepoint Ops LLC | 300,934 | $3.58M | 0.01% | +255,496+562.3% | Added |
| Raymond James Financial Inc | 291,715 | $3.47M | 0.00% | −6,001−2.0% | Reduced |
| Norwood Investment Partners, LP | 285,000 | $3.39M | 5.21% | −45,000−13.6% | Reduced |
| Swiss National Bank | 284,300 | $3.38M | 0.00% | +3,600+1.3% | Added |
| Algert Global LLC | 269,035 | $3.20M | 0.05% | −240,825−47.2% | Reduced |
| Invesco Ltd. | 261,370 | $3.11M | 0.00% | +17,805+7.3% | Added |
| Senvest Management, LLC | 224,100 | $2.66M | 0.09% | 00.0% | Unchanged |
| Voya Investment Management LLC | 210,567 | $2.50M | 0.00% | −9,873−4.5% | Reduced |
| Hilton Capital Management, LLC | 208,154 | $2.47M | 0.19% | +27,681+15.3% | Added |
| Rice Hall James & Associates, LLC | 192,808 | $2.29M | 0.13% | −6,020−3.0% | Reduced |
| Wedge Capital Management L L P | 189,767 | $2.25M | 0.04% | −136−0.1% | Reduced |
| State of Wisconsin Investment Board | 185,470 | $2.20M | 0.01% | −34,089−15.5% | Reduced |
| Barclays PLC | 180,646 | $2.15M | 0.00% | −185,744−50.7% | Reduced |
| Rhumbline Advisers | 179,976 | $2.14M | 0.00% | −3,969−2.2% | Reduced |
| Walleye Trading LLC | 179,394 | $2.13M | 0.04% | +126,527+239.3% | Added |
| California State Teachers Retirement System | 176,528 | $2.10M | 0.00% | +40,004+29.3% | Added |
| P.A.W. Capital Corp | 170,000 | $2.02M | 1.62% | +30,000+21.4% | Added |
| Price T Rowe Associates Inc | 165,440 | $1.97M | 0.00% | −546,055−76.7% | Reduced |
| LPL Financial LLC | 155,444 | $1.85M | 0.00% | +38,994+33.5% | Added |
| Dba Trading, LLC | 150,000 | $1.78M | 0.89% | +95,000+172.7% | Added |
| ExodusPoint Capital Management, LP | 149,219 | $1.77M | 0.02% | +149,219 | New |
| XTX Topco Ltd | 146,591 | $1.74M | 0.03% | +99,928+214.1% | Added |
| Deutsche Bank AG | 139,644 | $1.66M | 0.00% | +11,176+8.7% | Added |
| Toroso Investments, LLC | 133,764 | $1.59M | 0.00% | +9,856+8.0% | Added |
| Brevan Howard Capital Management LP | 133,245 | $1.58M | 0.02% | +133,245 | New |
| Twinbeech Capital LP | 132,379 | $1.57M | 0.16% | +132,379 | New |
| Quantinno Capital Management LP | 128,133 | $1.52M | 0.00% | +75,686+144.3% | Added |
| Vanguard Asset Management, Ltd | 126,372 | $1.50M | 0.00% | +126,372 | New |
| Legal & General Group Plc | 122,047 | $1.45M | 0.00% | −26,794−18.0% | Reduced |
| AQR Capital Management LLC | 121,212 | $1.44M | 0.00% | +23,677+24.3% | Added |
| Perkins Capital Management Inc | 119,275 | $1.42M | 1.33% | −2,500−2.1% | Reduced |
| Radcliffe Capital Management, L.P. | 112,400 | $1.34M | 0.10% | +25,000+28.6% | Added |
| Penbrook Management LLC | 112,190 | $1.33M | 1.01% | +81,075+260.6% | Added |