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 24 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 |
|---|---|---|---|---|---|
| Edenbrook Capital, LLC | 2,110,370 | $46.0M | 23.36% | −1,499,602−41.5% | Reduced |
| Goldman Sachs Group Inc | 2,385,439 | $52.0M | 0.01% | +470,039+24.5% | Added |
| Price T Rowe Associates Inc | 2,547,505 | $55.5M | 0.01% | +2,429,904+2,066.2% | Added |
| Nine Ten Capital Management LLC | 2,858,583 | $62.3M | 16.05% | 00.0% | Unchanged |
| Nuveen, LLC | 3,092,036 | $67.3M | 0.02% | −159,056−4.9% | Reduced |
| State Street Corp | 3,126,790 | $68.1M | 0.00% | +73,183+2.4% | Added |
| Geode Capital Management, LLC | 3,399,093 | $74.0M | 0.00% | +182,251+5.7% | Added |
| Dimensional Fund Advisors LP | 3,567,254 | $77.7M | 0.02% | −1,334,579−27.2% | Reduced |
| Granahan Investment Management Inc | 3,873,179 | $84.4M | 3.45% | +230,393+6.3% | Added |
| Boston Partners | 4,449,004 | $95.2M | 0.10% | −1,125,600−20.2% | Reduced |
| American Century Companies Inc | 4,594,070 | $100.1M | 0.05% | −235,127−4.9% | Reduced |
| Wellington Management Group LLP | 5,144,549 | $112.0M | 0.02% | −303,288−5.6% | Reduced |
| Capital Research Global Investors | 6,982,861 | $152.1M | 0.03% | −5,937,209−46.0% | Reduced |
| BlackRock, Inc. | 11,413,155 | $248.6M | 0.00% | +715,111+6.7% | Added |
| Vanguard Group Inc | 14,654,432 | $319.2M | 0.00% | +1,092,147+8.1% | Added |
| FMR LLC | 17,141,014 | $373.3M | 0.02% | −44,925−0.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −1,900,598−100.0% | Sold out |
| Pacer Advisors, Inc. | 0 | $0 | 0.00% | −791,819−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −699,932−100.0% | Sold out |
| Roubaix Capital, LLC | 0 | $0 | 0.00% | −260,735−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −225,281−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −63,448−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −59,132−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −35,727−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −33,800−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −25,968−100.0% | Sold out |
| Evanson Asset Management, LLC | 0 | $0 | 0.00% | −21,171−100.0% | Sold out |
| Johnson Investment Counsel Inc | 0 | $0 | 0.00% | −20,208−100.0% | Sold out |
| Mount Yale Investment Advisors, LLC | 0 | $0 | 0.00% | −18,001−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −17,000−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −13,655−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −12,729−100.0% | Sold out |
| FDx Advisors, Inc. | 0 | $0 | 0.00% | −12,375−100.0% | Sold out |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −12,124−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −12,070−100.0% | Sold out |
| Prudent Man Advisors, LLC | 0 | $0 | 0.00% | −11,360−100.0% | Sold out |
| Massar Capital Management, LP | 0 | $0 | 0.00% | −11,000−100.0% | Sold out |
| Wealth Enhancement Advisory Services, LLC | 0 | $0 | 0.00% | −10,405−100.0% | Sold out |
| Mairs & Power Inc | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −9,402−100.0% | Sold out |
| Voya Financial Advisors, Inc. | 0 | $0 | 0.00% | −10,686−100.0% | Sold out |
| Antipodes Partners Ltd | 0 | $0 | 0.00% | −9,162−100.0% | Sold out |
| Kestra Private Wealth Services, LLC | 0 | $0 | 0.00% | −8,873−100.0% | Sold out |
| Brinker Capital Investments, LLC | 0 | $0 | 0.00% | −8,602−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −8,590−100.0% | Sold out |
| GWN Securities Inc. | 0 | $0 | 0.00% | −8,496−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −3,070−100.0% | Sold out |
| Park Square Financial Group, LLC | 0 | $0 | 0.00% | −272−100.0% | Sold out |
| NVWM, LLC | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Bryn Mawr Trust Co | 0 | $0 | 0.00% | −152−100.0% | Sold out |
| South State Corp. | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −62−100.0% | Sold out |
| HM Payson & Co | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| TD Waterhouse Canada Inc. | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Tradewinds Capital Management, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Norges Bank | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |