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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.

Q3 2025 vs. Q2 2025

How the institutions holding Magnite, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of MGNI: Q2 2025 compared with Q3 2025
MeasureQ2 2025Of which not filed for Q3 2025Q3 2025Change
Holders2872316+31
Shares147.0M126.0K138.0M−8.85M (−6.0%)
Value$3.54B$3.04M$3.00B−$536.4M (−15.2%)

2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (71)

Institutions that held Magnite, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to MGNI in Q3 2025
InstitutionSharesValue% of portfolio
T. Rowe Price Investment Management, Inc.890,918$19.4M0.01%
Millennium Management LLC676,349$14.7M0.01%
325 Capital LLC650,061$14.2M4.30%
Tudor Investment Corp Et Al449,109$9.78M0.06%
Voloridge Investment Management, LLC375,212$8.17M0.03%
Point72 Asset Management, L.P.305,316$6.65M0.01%
Polar Asset Management Partners Inc.213,866$4.66M0.09%
Qube Research & Technologies Ltd208,938$4.55M0.01%
Squarepoint Ops LLC166,469$3.63M0.01%
Bridgewater Associates, LP145,671$3.17M0.01%
Campbell & CO Investment Adviser LLC132,785$2.89M0.22%
Nippon Life Global Investors Americas, Inc.120,350$2.62M0.11%
State of New Jersey Common Pension Fund D94,452$2.06M0.01%
XTX Topco Ltd81,445$1.77M0.09%
Cubist Systematic Strategies, LLC71,251$1.55M0.02%
Steinberganna Wealth Management69,024$1.50M0.71%
Brown Advisory Inc64,681$1.41M0.00%
Fox Run Management, L.L.C.63,761$1.39M0.22%
Algert Global LLC47,270$1.03M0.02%
RE Advisers Corp43,900$956.1K0.02%
Jennison Associates LLC40,431$880.6K0.00%
Virtu Financial LLC37,311$813.0K0.05%
Sierra Summit Advisors LLC34,632$754.3K0.11%
Jain Global LLC32,447$706.7K0.01%
TD Asset Management Inc30,740$669.5K0.00%
Bailard, Inc.29,079$633.3K0.01%
Teachers Retirement System of the State of Kentucky25,201$549.0K0.00%
Moran Wealth Management, LLC25,121$547.1K0.02%
Federated Hermes, Inc.23,100$503.1K0.00%
Counterpoint Mutual Funds LLC22,156$482.6K0.04%
Walleye Trading LLC17,280$376.4K0.01%
Numerai GP LLC16,327$355.6K0.05%
Magnetar Financial LLC15,189$330.8K0.00%
CIBC Bancorp USA Inc.14,929$325.2K0.00%
Marshall Wace, LLP12,648$275.5K0.00%
Point72 (DIFC) Ltd11,770$256.3K0.02%
O'Shaughnessy Asset Management, LLC10,677$232.5K0.00%
Intrust Bank NA10,002$217.8K0.02%
Cetera Trust Company, N.A9,860$214.8K0.12%
National Wealth Management Group, LLC9,221$200.8K0.08%
OP Asset Management Ltd8,230$179.2K0.00%
Bayforest Capital Ltd6,201$135.1K0.06%
Quantbot Technologies LP4,047$88.1K0.00%
Johnson Financial Group, Inc.3,818$83.2K0.00%
Point72 Hong Kong Ltd3,639$79.3K0.00%
Canada Pension Plan Investment Board2,800$61.0K0.00%
Westfuller Advisors, LLC2,570$56.0K0.03%
Strategic Advocates LLC1,922$41.9K0.01%
USA Financial Portformulas Corp1,835$40.0K0.01%
State of Wyoming1,774$38.6K0.00%
Rockefeller Capital Management L.P.1,266$27.6K0.00%
Neo Ivy Capital Management1,234$26.9K0.01%
Point72 Asia (Singapore) Pte. Ltd.1,210$26.4K0.00%
Rossby Financial, LCC500$10.2K0.00%
CoreCap Advisors, LLC310$6.75K0.00%
Anchor Investment Management, LLC150$3.27K0.00%
SRS Capital Advisors, Inc.139$3.03K0.00%
Quarry LP99$2.16K0.00%
Root Financial Partners, LLC59$1.28K0.00%
Hemington Wealth Management67$1.00K0.00%
Essential Partners LLC26$5660.00%
Rise Advisors, LLC22$4790.00%
JFS Wealth Advisors, LLC18$3930.00%
Abich Financial Wealth Management LLC9$1960.00%
Wealthspire Advisors, LLC8$1740.00%
Caitong International Asset Management Co., Ltd7$1520.00%
Truvestments Capital LLC5$1090.00%
Rialto Wealth Management, LLC3$660.00%
SJS Investment Consulting Inc.2$440.00%
HFM Investment Advisors, LLC1$220.00%
Cloud Capital Management, LLC6$00.00%

Sold out (40)

Institutions that held Magnite, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of MGNI in Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
Schonfeld Strategic Advisors LLC1,900,598$45.8M
Pacer Advisors, Inc.791,819$19.1M
Balyasny Asset Management LLC699,932$16.9M
Roubaix Capital, LLC260,735$6.29M
Connor, Clark & Lunn Investment Management Ltd.225,281$5.43M
PDT Partners, LLC63,448$1.53M
Weiss Asset Management LP59,132$1.43M
ExodusPoint Capital Management, LP35,727$862.0K
Bayesian Capital Management, LP33,800$815.3K
Walleye Capital LLC25,968$626.3K
Evanson Asset Management, LLC21,171$510.6K
Johnson Investment Counsel Inc20,208$487.4K
Mount Yale Investment Advisors, LLC18,001$434.2K
Centiva Capital, LP17,000$410.0K
Amundi13,655$336.9K
Lazard Asset Management LLC12,729$306.0K
FDx Advisors, Inc.12,375$298.0K
MML Investors Services, LLC12,124$292.0K
Two Sigma Securities, LLC12,070$291.1K
Prudent Man Advisors, LLC11,360$274.0K
Massar Capital Management, LP11,000$265.3K
Wealth Enhancement Advisory Services, LLC10,405$255.2K
Mairs & Power Inc10,000$241.2K
Marex Group plc9,402$226.8K
Voya Financial Advisors, Inc.10,686$225.5K
Antipodes Partners Ltd9,162$221.0K
Kestra Private Wealth Services, LLC8,873$214.0K
Brinker Capital Investments, LLC8,602$207.5K
Mackenzie Financial Corp8,590$207.2K
GWN Securities Inc.8,496$205.3K
Skopos Labs, Inc.3,070$74.0K
Park Square Financial Group, LLC272$6.56K
NVWM, LLC200$4.82K
Bryn Mawr Trust Co152$3.67K
South State Corp.100$2.41K
Principal Securities, Inc.62$1.50K
HM Payson & Co40$965
Federation des caisses Desjardins du Quebec40$965
TD Waterhouse Canada Inc.25$603
Tradewinds Capital Management, LLC20$483

Not filed for Q3 2025 yet (2)

Institutions that held Magnite, Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MGNI in Q2 2025 that haven't filed for Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
Norges Bank108,716$2.62M
CIBC World Markets Corp17,256$416.2K