MAGNITE INC

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

MGNI (MAGNITE INC) is held by 140 institutional investors as of Q2 2026. Largest holders: BlackRock, Inc. ($241.3M), VANGUARD PORTFOLIO MANAGEMENT LLC ($155.6M), FMR LLC ($147.3M). Net institutional sentiment: Mixed.

140

Holders

(10 Elite)

$2B

Total Value

60% (152)

Consensus

91 buying - 61 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)50

Insider (Form 4)46

Activist (13D/13G)48

Congressional (STOCK Act)79

Holder Quality

68

★★★★★

Elite

10

★★★★

Strong

76

★★★

Solid

34

★★

Below

75

★

Weak

Held by 140 funds

10 elite

Who's Trading

Source dates: Price Aug 28, 2026 · Insiders Aug 28, 2026 · Activists Aug 13, 2026 · Congress none

InsiderHPHarden Sarah PatriciaSell $442KAug 28, 2026

InsiderHPHarden Sarah PatriciaSell $712KAug 26, 2026

InsiderBPBuckley Sean PatrickSell $69KAug 18, 2026

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Top Holders

Top Holders (140)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	12.7M(+9.1%)	$241.3M	0.0%	+35.33%	34
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	8.2M(+6.1%)	$155.6M	0.0%	+66.18%	32
FMR LLC	Increased	7.8M(+72.2%)	$147.3M	0.0%	+34.64%	45
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	6.2M(+0.6%)	$118.2M	0.0%	+69.43%	30
WELLINGTON MANAGEMENT GROUP LLP	Decreased	6M(-34.2%)	$114.7M	0.0%	+66.19%	0
DIMENSIONAL FUND ADVISORS LP	Increased	5.3M(+32.0%)	$99.8M	0.0%	+90.68%	38
Boston Partners	Increased	5M(+6.2%)	$95.9M	0.1%	+60.23%	32
AMERICAN CENTURY COMPANIES INC	Decreased	4.6M(-0.1%)	$87.7M	0.0%	+51.64%	0
Capital Research Global Investors	Decreased	3.9M(-22.9%)	$73.4M	0.0%	+51.94%	0
Nuveen, LLC	Increased	3.8M(+5.7%)	$72M	0.0%	+85.64%	31
GEODE CAPITAL MANAGEMENT, LLC	Increased	3.8M(+6.7%)	$71.9M	0.0%	+58.52%	32
STATE STREET CORP	Increased	3.5M(+11.5%)	$67M	0.0%	+107.39%	33
CANADA PENSION PLAN INVESTMENT BOARD	Increased	3M(+6403.7%)	$56.8M	0.0%	+23.56%	47
JANE STREET GROUP, LLC	Increased	2.2M(+31.8%)	$41.7M	0.0%	+45.69%	37
MORGAN STANLEY	Increased	2M(+114.9%)	$37.8M	0.0%	+24.15%	47
Qube Research & Technologies Ltd	Increased	2M(+195.9%)	$37.1M	0.0%	+29.16%	47
NORTHERN TRUST CORP	Increased	1.6M(+17.4%)	$29.5M	0.0%	+104.01%	34
ROYCE & ASSOCIATES LP	Increased	1.5M(+7.9%)	$28M	0.2%	+90.04%	37
GOLDMAN SACHS GROUP INC	Decreased	1.5M(-2.3%)	$27.8M	0.0%	+19.83%	0
VICTORY CAPITAL MANAGEMENT INC	Decreased	1.2M(-2.5%)	$23.4M	0.0%	+68.06%	0

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer