Who Owns Magnite, Inc. (MGNI)?Hedge Fund & Institutional Holders

$11.85-0.45 (-3.62%)Communication ServicesNASDAQ

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$InfinityT

% of Float Held

Infinity%

QoQ Change in Holders

+9 / -2

Price History

$9.00$13.38$17.76$22.14$26.52Aug 24Jun 25Mar 26

MGNI — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
Capital Research Global InvestorsIncreased+5.9M+$56.9B
Ophir Asset Management Pty LtdNew Position+2.4M+$38.7B
No Street GP LPNew Position+1.5M+$23.9B
WELLINGTON MANAGEMENT GROUP LLPIncreased+3.5M+$23.0B
Maestria Partners LLCNew Position+1.4M+$22.1B
325 CAPITAL LLCIncreased+1.4M+$18.4B
Stephens Investment Management Group LLCNew Position+1.1M+$18.3B
BALYASNY ASSET MANAGEMENT L.P.New Position+873K+$14.0B
NORDEA INVESTMENT MANAGEMENT ABNew Position+445K+$7.3B
NEW YORK STATE COMMON RETIREMENT FUNDNew Position+474K+$7.0B
Man Group plcNew Position+312K+$5.0B
Kopion Asset Management, LLCIncreased+368K+$4.6B
CITADEL ADVISORS LLCIncreased+375K+$4.3B
COMMONWEALTH EQUITY SERVICES, LLCNew Position+254K+$4.0B
SIMPLEX TRADING, LLCIncreased+146K+$4.0B

MGNI — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
Granahan Investment Management, LLCDecreased-757K-$33.8B
DRIEHAUS CAPITAL MANAGEMENT LLCClosed Position-1.5M-$33.0B
Boston PartnersDecreased-340K-$30.2B
GOLDMAN SACHS GROUP INCDecreased-624K-$24.0B
JANE STREET GROUP, LLCDecreased-710K-$23.7B
JPMORGAN CHASE & CODecreased-703K-$19.3B
NOMURA ASSET MANAGEMENT CO LTDDecreased-717K-$19.2B
MILLENNIUM MANAGEMENT LLCDecreased-653K-$14.7B
NORTHERN TRUST CORPDecreased-93K-$11.7B
TUDOR INVESTMENT CORP ET ALDecreased-414K-$9.8B
J. Goldman & Co LPDecreased-246K-$9.7B
SUSQUEHANNA INTERNATIONAL GROUP, LLPDecreased-305K-$9.4B
APIS CAPITAL ADVISORS, LLCDecreased-235K-$8.5B
FRONTIER CAPITAL MANAGEMENT CO LLCDecreased-149K-$8.5B
VOLORIDGE INVESTMENT MANAGEMENT, LLCClosed Position-375K-$8.2B

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1Capital Research Global Investors12,920,289$209.0B0.04%Share
2FMR LLC6,543,119$106.0B0.01%Share
3AMERICAN CENTURY COMPANIES INC5,286,928$85.0B0.04%Share
4WELLINGTON MANAGEMENT GROUP LLP5,086,347$82.0B0.01%Share
5Boston Partners3,607,682$58.0B0.06%Share
6DIMENSIONAL FUND ADVISORS LP3,264,773$52.0B0.01%Share
7Granahan Investment Management, LLC3,115,930$50.6B2.17%Share
8Nine Ten Capital Management LLC3,003,583$48.7B15.43%Share
9Ophir Asset Management Pty Ltd2,384,187$38.7B4.34%Share
10WELLINGTON MANAGEMENT GROUP LLP2,330,831$37.0B0.01%Share
11325 CAPITAL LLC2,005,387$32.5B11.40%Share
12No Street GP LP1,475,000$23.9B1.61%Share
13KENNEDY CAPITAL MANAGEMENT LLC1,435,970$23.3B0.49%Share
14GOLDMAN SACHS GROUP INC1,428,670$23.0B0.00%Share
15Maestria Partners LLC1,363,505$22.1B6.48%Share
16Nuveen, LLC1,326,366$21.0B0.01%Share
17Nuveen, LLC1,267,408$20.0B0.01%Share
18Caption Management, LLC1,182,000$19.2B0.13%Call
19CHARLES SCHWAB INVESTMENT MANAGEMENT INC1,187,501$19.0B0.00%Share
20ROYCE & ASSOCIATES LP1,166,469$18.9B0.19%Share
21Stephens Investment Management Group LLC1,128,578$18.3B0.24%Share
22NORTHERN TRUST CORP1,135,193$18.0B0.00%Share
23FRONTIER CAPITAL MANAGEMENT CO LLC944,701$15.3B0.16%Share
24Nuveen, LLC937,334$15.0B0.00%Share
25BALYASNY ASSET MANAGEMENT L.P.873,208$14.0B0.02%Share
26Meros Investment Management, LP825,595$13.4B5.31%Share
27J. Goldman & Co LP782,837$12.7B0.33%Share
28CITADEL ADVISORS LLC760,200$12.0B0.00%Put
29SUSQUEHANNA INTERNATIONAL GROUP, LLP760,500$12.0B0.00%Call
30Penn Capital Management Company, LLC694,766$11.3B0.90%Share
31SILVERCREST ASSET MANAGEMENT GROUP LLC685,259$11.0B0.08%Share
32NOMURA ASSET MANAGEMENT CO LTD622,700$10.0B0.03%Share
33Kopion Asset Management, LLC614,459$10.0B7.13%Share
34APIS CAPITAL ADVISORS, LLC604,000$9.8B1.71%Share
35GRIZZLYROCK CAPITAL, LLC571,906$9.3B6.95%Share
36WELLINGTON MANAGEMENT GROUP LLP603,838$9.0B0.00%Share
37KING LUTHER CAPITAL MANAGEMENT CORP515,635$8.0B0.03%Share
38NEW YORK STATE COMMON RETIREMENT FUND474,457$7.0B0.01%Share
39CITADEL ADVISORS LLC437,900$7.0B0.00%Call
40Walleye Trading LLC441,300$7.0B0.01%Call
41S Squared Technology, LLC402,862$6.5B2.53%Share
42UBS Group AG380,420$6.2B0.00%Share
43IMC-Chicago, LLC376,000$6.1B0.00%Call
44WELLINGTON MANAGEMENT GROUP LLP400,220$6.0B0.00%Share
45JPMORGAN CHASE & CO386,457$6.0B0.00%Share
46NORDEA INVESTMENT MANAGEMENT AB348,210$5.7B0.00%Share
47Manatuck Hill Partners, LLC350,000$5.7B1.99%Share
481492 Capital Management LLC341,398$5.5B2.12%Share
49Norwood Investment Partners, LP330,000$5.4B6.03%Share
50BARCLAYS PLC366,286$5.0B0.00%Share

MGNI Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 2025304$1.4T+75
Q3 2025229$1.5T-10
Q2 2025239$2.0T-50
Q1 2025289$1.1T+24
Q4 2024265$1.7T+53
Q3 2024212$65.5T+9
Q2 2024203$68.3T+30
Q1 2024173$176.6T—

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As of Q4 2025, 50 institutional investors hold MGNI (Magnite, Inc.). The largest holder is Capital Research Global Investors with $209.0B in shares. This quarter, 9 institutions opened new positions and 2 closed their positions.

Frequently Asked Questions

How many hedge funds own MGNI?

As of Q4 2025, 50 institutional investors report holding MGNI (Magnite, Inc.) in their 13F filings.

Who is the largest institutional holder of MGNI?

The largest institutional holder of MGNI is Capital Research Global Investors with $209.0B in shares.

Is institutional ownership of MGNI increasing or decreasing?

This quarter, 9 institutions opened new positions in MGNI and 2 closed their positions.