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, Q2 2026
Institutional positions in Magnite, Inc. as of Jun 30, 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
- 311
- +18 vs. Q1 2026
- Shares held
- 141.9M
- +10.4M (+7.9%) vs. Q1 2026
- Total value
- $2.69B
- +$1.13B (+72.2%) vs. Q1 2026
- New holders
- 55
- 116 more added
- Sold out
- 37
- 90 more reduced
4 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Magnite, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Nuveen, LLC | 3,794,811 | $72.0M | 0.02% | +204,786+5.7% | Added |
| Capital Research Global Investors | 3,869,159 | $73.4M | 0.01% | −1,151,130−22.9% | Reduced |
| American Century Companies Inc | 4,622,736 | $87.7M | 0.04% | −4,080−0.1% | Reduced |
| Boston Partners | 5,013,835 | $95.9M | 0.09% | +293,972+6.2% | Added |
| Dimensional Fund Advisors LP | 5,260,132 | $99.8M | 0.02% | +1,276,458+32.0% | Added |
| Wellington Management Group LLP | 6,044,492 | $114.7M | 0.02% | −3,146,585−34.2% | Reduced |
| Vanguard Capital Management LLC | 6,225,195 | $118.2M | 0.00% | +34,792+0.6% | Added |
| FMR LLC | 7,759,426 | $147.3M | 0.01% | +3,252,007+72.1% | Added |
| Vanguard Portfolio Management LLC | 8,197,286 | $155.6M | 0.01% | +471,081+6.1% | Added |
| BlackRock, Inc. | 12,713,156 | $241.3M | 0.00% | +1,055,660+9.1% | Added |
| Coppell Advisory Solutions LLC | 168 | – | – | +168 | New |
| No Street GP LP | 0 | $0 | 0.00% | −1,628,248−100.0% | Sold out |
| Pacer Advisors, Inc. | 0 | $0 | 0.00% | −501,578−100.0% | Sold out |
| Capital World Investors | 0 | $0 | 0.00% | −456,672−100.0% | Sold out |
| Wedge Capital Management L L P | 0 | $0 | 0.00% | −189,767−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −179,394−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −133,245−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −132,379−100.0% | Sold out |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −101,973−100.0% | Sold out |
| Teachers Retirement System of the State of Kentucky | 0 | $0 | 0.00% | −76,813−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −73,645−100.0% | Sold out |
| Jennison Associates LLC | 0 | $0 | 0.00% | −57,849−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −42,100−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −24,999−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −24,761−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −22,162−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −20,044−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −18,500−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −17,000−100.0% | Sold out |
| Cambridge Investment Research Advisors, Inc. | 0 | $0 | 0.00% | −15,022−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −13,347−100.0% | Sold out |
| Bayforest Capital Ltd | 0 | $0 | 0.00% | −13,225−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −12,885−100.0% | Sold out |
| OP Asset Management Ltd | 0 | $0 | 0.00% | −12,621−100.0% | Sold out |
| Sciencast Management LP | 0 | $0 | 0.00% | −11,704−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −11,316−100.0% | Sold out |
| Ritholtz Wealth Management | 0 | $0 | 0.00% | −10,334−100.0% | Sold out |
| JustInvest LLC | 0 | $0 | 0.00% | −10,311−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −5,579−100.0% | Sold out |
| MCF Advisors LLC | 0 | $0 | 0.00% | −1,500−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −1,145−100.0% | Sold out |
| Essential Partners LLC | 0 | $0 | 0.00% | −696−100.0% | Sold out |
| Root Financial Partners, LLC | 0 | $0 | 0.00% | −228−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −49−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −35−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| Wealth Preservation Advisors, LLC | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| Kilter Group LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Janus Henderson Group PLC | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |
| Evelyn Partners Investment Management Services Ltd | – | – | – | – | Not filed |
| McIlrath & Eck, LLC | – | – | – | – | Not filed |