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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.

Q1 2026 vs. Q4 2025

How the institutions holding Magnite, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of MGNI: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders3045297−2
Shares136.7M14.9M131.6M+9.78M (+8.0%)
Value$2.22B$241.8M$1.56B−$413.1M (−20.9%)

5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (52)

Institutions that held Magnite, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to MGNI in Q1 2026
InstitutionSharesValue% of portfolio
Vanguard Portfolio Management LLC7,726,205$91.8M0.00%
Vanguard Capital Management LLC6,190,403$73.5M0.00%
Vanguard Fiduciary Trust Co997,082$11.8M0.00%
Park West Asset Management LLC598,380$7.11M0.63%
Pacer Advisors, Inc.501,578$5.96M0.02%
Capital World Investors456,672$5.43M0.00%
Lisanti Capital Growth, LLC309,440$3.68M0.93%
ExodusPoint Capital Management, LP149,219$1.77M0.02%
Brevan Howard Capital Management LP133,245$1.58M0.02%
Twinbeech Capital LP132,379$1.57M0.16%
Vanguard Asset Management, Ltd126,372$1.50M0.00%
Fox Run Management, L.L.C.88,103$1.02M0.18%
Legato Capital Management LLC84,790$1.01M0.09%
Ardsley Advisory Partners LP78,000$926.6K0.14%
Jupiter Asset Management Ltd69,441$825.0K0.00%
Fifth Third Bancorp58,823$698.8K0.00%
Jennison Associates LLC57,849$687.2K0.00%
Vanguard Global Advisers, LLC57,816$686.9K0.00%
Natixis42,100$500.1K0.00%
Vanguard Investments Australia, Ltd.35,321$419.6K0.00%
Jackson Creek Investment Advisors LLC34,671$412.0K0.12%
Linden Thomas Advisory Services, LLC26,421$313.9K0.03%
Entropy Technologies, LP24,761$294.2K0.01%
Mount Yale Investment Advisors, LLC23,648$280.9K0.01%
Prudential Financial Inc22,452$266.7K0.00%
Dynamic Technology Lab Private Ltd22,162$263.3K0.04%
Mirabella Financial Services LLP21,285$252.9K0.02%
Virtu Financial LLC20,044$238.0K0.01%
Mercer Global Advisors Inc18,458$219.3K0.00%
Avenir Corp17,715$210.5K0.03%
Caitong International Asset Management Co., Ltd14,350$170.5K0.03%
GWN Securities Inc.14,321$170.1K0.03%
Gotham Asset Management, LLC12,885$153.1K0.00%
Two Sigma Securities, LLC12,031$142.9K0.02%
Sciencast Management LP11,704$139.0K0.02%
Dark Forest Capital Management LP11,687$138.8K0.01%
Money Concepts Capital Corp11,659$138.5K0.01%
Ritholtz Wealth Management10,334$122.8K0.00%
JustInvest LLC10,311$122.5K0.00%
Acadian Asset Management LLC3,686$43.0K0.00%
BNP PARIBAS ASSET MANAGEMENT Holding S.A.2,677$31.8K0.00%
Exchange Traded Concepts, LLC1,964$23.3K0.00%
Owl Creek Wealth Partners LLC945$11.2K0.00%
Kemnay Advisory Services Inc.742$8.81K0.00%
Cassaday & Co Wealth Management LLC715$8.49K0.00%
Gill Capital Partners, LLC75$8910.00%
CVA Family Office, LLC70$8320.00%
GWM Advisors LLC35$4160.00%
Twin Peaks Wealth Advisors, LLC29$3450.00%
Massmutual Trust Co FSB11$1310.00%
Wealth Preservation Advisors, LLC8$950.00%
Kilter Group LLC1$120.00%

Sold out (54)

Institutions that held Magnite, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of MGNI in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Stephens Investment Management Group LLC1,128,578$18.3M
Frontier Capital Management Co LLC944,701$15.3M
J. Goldman & Co LP782,837$12.7M
Penn Capital Management Co Inc694,766$11.3M
Apis Capital Advisors, LLC604,000$9.80M
Pillsbury Lake Capital LLC583,644$9.47M
Bank of Montreal276,273$4.48M
AYAL Capital Advisors Ltd200,000$3.25M
First Trust Advisors LP199,872$3.24M
Bridgewater Associates, LP145,187$2.36M
Boothbay Fund Management, LLC117,842$1.91M
Calamos Advisors LLC113,457$1.84M
Magnetar Financial LLC96,163$1.56M
Verition Fund Management LLC62,277$1.01M
Weiss Asset Management LP58,484$949.2K
Laurion Capital Management LP50,869$825.6K
Engineers Gate Manager LP41,137$667.7K
Thrivent Financial for Lutherans32,744$531.0K
Nippon Life Global Investors Americas, Inc.32,180$522.3K
Sender Co & Partners, Inc.29,905$485.4K
Brinker Capital Investments, LLC29,372$476.7K
Edgestream Partners, L.P.28,194$457.6K
Freestone Grove Partners LP27,761$450.6K
Antipodes Partners Ltd24,831$403.0K
Outlook Wealth Advisors, LLC24,764$401.9K
Griffin Asset Management, Inc.19,935$323.5K
Quest Partners LLC19,153$310.9K
ARS Investment Partners, LLC14,000$227.2K
Florida Financial Advisors, LLC12,686$205.9K
Bayesian Capital Management, LP11,987$194.5K
Concurrent Investment Advisors, LLC11,270$182.9K
Harbour Capital Advisors, LLC11,000$176.7K
Versor Investments LP10,800$175.3K
FNY Investment Advisers, LLC4,775$77.0K
State of Wyoming4,600$74.7K
Amalgamated Bank4,400$71.0K
AdvisorNet Financial, Inc3,500$56.8K
Smithfield Trust Co3,240$52.0K
Strategic Advocates LLC1,920$31.6K
Torren Management, LLC541$8.78K
Raleigh Capital Management Inc.385$6.25K
Lloyd Advisory Services, LLC.301$4.88K
MTM Investment Management, LLC275$4.46K
Flagship Harbor Advisors, LLC175$2.84K
Richard W. Paul & Associates, LLC147$2.39K
Bay Harbor Wealth Management, LLC108$1.75K
Westside Investment Management, Inc.45$730
Basecamp Wealth Advisors LLC41$665
Bare Financial Services, Inc34$552
Quadrant Capital Group LLC33$536
Bell Investment Advisors, Inc30$487
UMA Financial Services, Inc.20$325
Atlantic Private Wealth, LLC15$243
HFM Investment Advisors, LLC4$65

Not filed for Q1 2026 yet (5)

Institutions that held Magnite, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MGNI in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc14,802,630$240.2M
Comerica Bank94,556$1.53M
CIBC Private Wealth Group, LLC131$2.13K
Global Retirement Partners, LLC80$1.30K
ORG Partners LLC65$1.05K