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, Q4 2025
Institutional positions in Magnite, Inc. as of Dec 31, 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
- 304
- +1 vs. Q3 2025
- Shares held
- 136.7M
- −1.02M (−0.7%) vs. Q3 2025
- Total value
- $2.22B
- −$779.0M (−26.0%) vs. Q3 2025
- New holders
- 56
- 122 more added
- Sold out
- 55
- 93 more reduced
13 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Magnite, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 8,629,238 | $140.1M | 0.02% | +3,484,689+67.7% | Added |
| BlackRock, Inc. | 11,593,249 | $188.2M | 0.00% | +180,094+1.6% | Added |
| Capital Research Global Investors | 12,920,289 | $209.7M | 0.04% | +5,937,428+85.0% | Added |
| Vanguard Group Inc | 14,802,630 | $240.2M | 0.00% | +148,198+1.0% | Added |
| Driehaus Capital Management LLC | 0 | $0 | 0.00% | −1,516,296−100.0% | Sold out |
| T. Rowe Price Investment Management, Inc. | 0 | $0 | 0.00% | −890,918−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −375,212−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −305,316−100.0% | Sold out |
| Cannell Capital LLC | 0 | $0 | 0.00% | −265,152−100.0% | Sold out |
| Alta Park Capital, LP | 0 | $0 | 0.00% | −255,698−100.0% | Sold out |
| Dilation Capital Management LP | 0 | $0 | 0.00% | −245,900−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −241,943−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −213,866−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −211,433−100.0% | Sold out |
| Castleark Management LLC | 0 | $0 | 0.00% | −193,185−100.0% | Sold out |
| Lisanti Capital Growth, LLC | 0 | $0 | 0.00% | −189,168−100.0% | Sold out |
| Advantage Alpha Capital Partners LP | 0 | $0 | 0.00% | −160,447−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −150,495−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −132,785−100.0% | Sold out |
| Panoramic Capital, LLC | 0 | $0 | 0.00% | −126,080−100.0% | Sold out |
| Zweig-DiMenna Associates LLC | 0 | $0 | 0.00% | −99,900−100.0% | Sold out |
| Clough Capital Partners L P | 0 | $0 | 0.00% | −94,652−100.0% | Sold out |
| State of New Jersey Common Pension Fund D | 0 | $0 | 0.00% | −94,452−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −69,509−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −63,761−100.0% | Sold out |
| Ardsley Advisory Partners LP | 0 | $0 | 0.00% | −60,000−100.0% | Sold out |
| Jennison Associates LLC | 0 | $0 | 0.00% | −40,431−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −37,311−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −35,220−100.0% | Sold out |
| Sierra Summit Advisors LLC | 0 | $0 | 0.00% | −34,632−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −32,447−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −30,740−100.0% | Sold out |
| Clear Creek Financial Management, LLC | 0 | $0 | 0.00% | −30,032−100.0% | Sold out |
| Bailard, Inc. | 0 | $0 | 0.00% | −29,079−100.0% | Sold out |
| Moran Wealth Management, LLC | 0 | $0 | 0.00% | −25,121−100.0% | Sold out |
| Pitcairn Co | 0 | $0 | 0.00% | −22,802−100.0% | Sold out |
| Counterpoint Mutual Funds LLC | 0 | $0 | 0.00% | −22,156−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −18,391−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −18,114−100.0% | Sold out |
| Numerai GP LLC | 0 | $0 | 0.00% | −16,327−100.0% | Sold out |
| HighTower Advisors, LLC | 0 | $0 | 0.00% | −14,780−100.0% | Sold out |
| O'Shaughnessy Asset Management, LLC | 0 | $0 | 0.00% | −10,677−100.0% | Sold out |
| Benjamin Edwards Inc | 0 | $0 | 0.00% | −10,155−100.0% | Sold out |
| Intrust Bank NA | 0 | $0 | 0.00% | −10,002−100.0% | Sold out |
| National Wealth Management Group, LLC | 0 | $0 | 0.00% | −9,221−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −4,047−100.0% | Sold out |
| Johnson Financial Group, Inc. | 0 | $0 | 0.00% | −3,818−100.0% | Sold out |
| Westfuller Advisors, LLC | 0 | $0 | 0.00% | −2,570−100.0% | Sold out |
| USA Financial Portformulas Corp | 0 | $0 | 0.00% | −1,835−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −1,594−100.0% | Sold out |
| Banque Cantonale Vaudoise | 0 | $0 | 0.00% | −1,369−100.0% | Sold out |
| Neo Ivy Capital Management | 0 | $0 | 0.00% | −1,234−100.0% | Sold out |
| HighMark Wealth Management LLC | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −99−100.0% | Sold out |
| Leonteq Securities AG | 0 | $0 | 0.00% | −96−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −22−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| Cloud Capital Management, LLC | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| EFG Asset Management (North America) Corp. | – | – | – | – | Not filed |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| CIBC Bancorp USA Inc. | – | – | – | – | Not filed |
| Point72 (DIFC) Ltd | – | – | – | – | Not filed |
| Wolverine Trading, LLC | – | – | – | – | Not filed |
| 1858 Wealth Management, LLC | – | – | – | – | Not filed |
| Shell Asset Management Co | – | – | – | – | Not filed |
| Point72 Hong Kong Ltd | – | – | – | – | Not filed |
| AllSquare Wealth Management LLC | – | – | – | – | Not filed |
| Point72 Asia (Singapore) Pte. Ltd. | – | – | – | – | Not filed |
| Pineridge Advisors LLC | – | – | – | – | Not filed |
| Hemington Wealth Management | – | – | – | – | Not filed |
| Abich Financial Wealth Management LLC | – | – | – | – | Not filed |