MAGNITE INC

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

MGNI (MAGNITE INC) is held by 137 institutional investors as of Q1 2026. Largest holders: BlackRock, Inc. ($138.5M), WELLINGTON MANAGEMENT GROUP LLP ($109.2M), Capital Research Global Investors ($59.6M). Net institutional sentiment: Mixed.

137

Holders

Avg rating(10 Elite)

$1B

Total Value

58% (148)

Fund Consensus

83 buying - 60 selling

Smart Money Verdict

View all

34Negative MomentumStrong Convergence

Institutional (13F)50

Insider (Form 4)0

Activist (13D/13G)47

Congressional (STOCK Act)

No data

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See how MGNI's score breaks down across 4 SEC sources

Holder Quality

10

★★★★★

Elite

46

★★★★

Strong

40

★★★

Solid

40

★★

Below

12

★

Weak

Held by 137 funds

10 elite

Who's Trading

ActivistCapital Research Global Investors3.5%May 14, 2026

ActivistFMR LLC3.1%May 6, 2026

InsiderSLSoroca Adam LeeSell $258KFeb 18, 2026

InsiderSLSoroca Adam LeeSell $283KDec 17, 2025

InsiderBPBuckley Sean PatrickSell $32KNov 24, 2025

InsiderSFSpillane Robert FSell $178KNov 21, 2025

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

Positions (137)History

AllNewIncreasedHeldDecreasedExited

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	11.7M(+0.6%)	$138.5M	0.0%	-25.13%	30
WELLINGTON MANAGEMENT GROUP LLP	Increased	9.2M(+6.5%)	$109.2M	0.0%	-8.87%	32
Capital Research Global Investors	Decreased	5M(-61.1%)	$59.6M	0.0%	-16.69%	0
Boston Partners	Increased	4.7M(+14.9%)	$56.1M	0.1%	-10.46%	34
AMERICAN CENTURY COMPANIES INC	Decreased	4.6M(-12.5%)	$55M	0.0%	-16.85%	0
FMR LLC	Decreased	4.5M(-32.7%)	$53.5M	0.0%	-20.86%	0
DIMENSIONAL FUND ADVISORS LP	Increased	4M(+10.2%)	$47.3M	0.0%	+26.82%	32
Nuveen, LLC	Increased	3.6M(+1.7%)	$42.6M	0.0%	+4.82%	30
GEODE CAPITAL MANAGEMENT, LLC	Increased	3.6M(+3.5%)	$42.2M	0.0%	-11.39%	30
STATE STREET CORP	Increased	3.2M(+0.7%)	$37.6M	0.0%	+23.46%	29
JANE STREET GROUP, LLC	Increased	1.7M(+338.7%)	$19.8M	0.0%	-15.18%	46
Schonfeld Strategic Advisors LLC	Increased	1.6M(+105.9%)	$19.1M	0.1%	-14.97%	55
GOLDMAN SACHS GROUP INC	Decreased	1.5M(-14.8%)	$17.8M	0.0%	-34.29%	0
BALYASNY ASSET MANAGEMENT L.P.	Increased	1.5M(+71.8%)	$17.8M	0.0%	-16.40%	42
ROYCE & ASSOCIATES LP	Increased	1.4M(+17.1%)	$16.2M	0.2%	+8.88%	39
NORTHERN TRUST CORP	Increased	1.3M(+4.0%)	$15.7M	0.0%	+26.33%	29
VICTORY CAPITAL MANAGEMENT INC	Increased	1.3M(+738.3%)	$15M	0.0%	-7.85%	45
MILLENNIUM MANAGEMENT LLC	Increased	1.2M(+5099.0%)	$14.7M	0.0%	-7.99%	45
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	1.2M(-0.6%)	$14M	0.0%	-1.54%	0
Bank of New York Mellon Corp	Decreased	1.1M(-3.8%)	$13.5M	0.0%	+1.26%	0

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High Conviction Moves-Signal Convergence-Fund Consensus-Double-Down Signals

Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer