MAGNITE INC (MGNI) is held by 143 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is BlackRock, Inc. as of Q1 2026.

Are institutions buying or selling MGNI?

In Q1 2026, 89 institutions opened or increased positions in MAGNITE INC while 60 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on MGNI?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for MAGNITE INC.

How many hedge funds hold MGNI?

143 institutional investors report holding MAGNITE INC (MGNI) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into MGNI?

As of Q1 2026, tracked institutions in MAGNITE INC show 89 buyers versus 60 sellers — net inflows.

MAGNITE INC

MGNI·55955D100·US·Common Stock·Communication Services - Advertising Agencies-13D/G

143

Holders

Avg rating(27 Elite)

$1.2B

Total Value

60% (154)

Fund Consensus

89 buying - 60 selling

Smart Money Verdict

View all

Held by 143 funds

27 elite

Who's Trading

InsiderBDBuonasera DavidSell $21KJun 1, 2026

Activist

Capital Research Global Investors3.5%May 14, 2026

Activist

FMR LLC3.1%May 6, 2026

ActivistVAVanguard Capital Management5.0%Apr 30, 2026

ActivistVPVanguard Portfolio Management5.4%Apr 29, 2026

Activist

The Vanguard Group0.0%Mar 27, 2026

InsiderSLSoroca Adam LeeSell $258KFeb 18, 2026

Activist

Wellington Management Group LLP6.0%Feb 10, 2026

InsiderSLSoroca Adam LeeSell $283KDec 17, 2025

InsiderBPBuckley Sean PatrickSell $32KNov 24, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	11.7M(+0.6%)	$138.5M	0.0%	+18.79%	30
WELLINGTON MANAGEMENT GROUP LLP	Increased	9.2M(+6.5%)	$109.2M	0.0%	+44.58%	32
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	7.7M	$91.8M	0.0%	+47.71%	41
VAVANGUARD CAPITAL MANAGEMENT LLC	New	6.2M	$73.5M	0.0%	+47.71%	41
Capital Research Global Investors	Decreased	5M(-61.1%)	$59.6M	0.0%	+32.18%	0
Boston Partners	Increased	4.7M(+14.9%)	$56.1M	0.1%	+42.06%	34
AMERICAN CENTURY COMPANIES INC	Decreased	4.6M(-12.5%)	$55M	0.0%	+31.93%	0
FMR LLC	Decreased	4.5M(-32.7%)	$53.5M	0.0%	+25.57%	0
DIMENSIONAL FUND ADVISORS LP	Increased	4M(+10.2%)	$47.3M	0.0%	+101.21%	32
Nuveen, LLC	Increased	3.6M(+1.7%)	$42.6M	0.0%	+66.31%	30
GEODE CAPITAL MANAGEMENT, LLC	Increased	3.6M(+3.5%)	$42.2M	0.0%	+40.59%	30
STATE STREET CORP	Increased	3.2M(+0.7%)	$37.6M	0.0%	+95.88%	29
JANE STREET GROUP, LLC	Increased	1.7M(+338.7%)	$19.8M	0.0%	+34.57%	46
Schonfeld Strategic Advisors LLC	Increased	1.6M(+105.9%)	$19.1M	0.1%	+34.91%	55
GOLDMAN SACHS GROUP INC	Decreased	1.5M(-14.8%)	$17.8M	0.0%	+4.25%	0
BALYASNY ASSET MANAGEMENT L.P.	Increased	1.5M(+71.8%)	$17.8M	0.0%	+32.63%	42
ROYCE & ASSOCIATES LP	Increased	1.4M(+17.1%)	$16.2M	0.2%	+72.74%	39
NORTHERN TRUST CORP	Increased	1.3M(+4.0%)	$15.7M	0.0%	+100.44%	29
VICTORY CAPITAL MANAGEMENT INC	Increased	1.3M(+738.3%)	$15M	0.0%	+46.21%	45
MILLENNIUM MANAGEMENT LLC	Increased	1.2M(+5099.0%)	$14.7M	0.0%	+45.98%	45