MAYVILLE ENGR CO INC

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MEC·578605107·US·Common Stock·Industrials - Metal Fabrication-13D/G

MEC (MAYVILLE ENGR CO INC) is held by 89 institutional investors as of Q2 2026. Largest holders: FMR LLC ($48M), BlackRock, Inc. ($44.3M), Allspring Global Investments Holdings, LLC ($37.8M). Net institutional sentiment: Bullish.

89

Holders

(8 Elite)

$533.8M

Total Value

68% (88)

Consensus

60 buying - 28 selling

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

Smart Money Verdict

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Institutional (13F)47

Insider (Form 4)76

Activist (13D/13G)82

Congressional (STOCK Act)35

Holder Quality

14

★★★★★

Elite

48

★★★★

Strong

22

★★★

Solid

60

★★

Below

33

★

Weak

Held by 89 funds

8 elite

Who's Trading

Source dates: Price Aug 27, 2026 · Insiders Jun 12, 2026 · Activists Aug 6, 2026 · Congress none

ActivistFMR LLC5.0%Aug 6, 2026

ActivistAllspring Global Investments Holdings, LLC4.2%Jul 8, 2026

InsiderRAReddy Jagadeesh ASell $550KJun 11, 2026

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Top Holders

Top Holders (89)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
FMR LLC	Increased	1.3M(+299x)	$48M	0.0%	-44.72%	47
BlackRock, Inc.	Increased	1.2M(+34.2%)	$44.3M	0.0%	-3.02%	38
Allspring Global Investments Holdings, LLC	Decreased	1.1M(-46.4%)	$37.8M	0.1%	+49.69%	0
DRIEHAUS CAPITAL MANAGEMENT LLC	New	846,354	$31.7M	0.2%	-44.82%	48
DIMENSIONAL FUND ADVISORS LP	Decreased	782,276(-15.5%)	$29.3M	0.0%	+29.73%	0
ROYCE & ASSOCIATES LP	Increased	752,083(+0.1%)	$28.2M	0.2%	+41.98%	34
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	743,621(+25.0%)	$27.9M	0.0%	-15.21%	35
Boston Partners	Increased	696,429(+199.4%)	$25.8M	0.0%	-30.67%	46
BLAIR WILLIAM & CO/IL	Decreased	546,714(-3.3%)	$20.5M	0.1%	+20.78%	0
WELLINGTON MANAGEMENT GROUP LLP	New	477,583	$17.9M	0.0%	-44.82%	39
GEODE CAPITAL MANAGEMENT, LLC	Increased	374,578(+11.5%)	$14M	0.0%	+25.47%	31
First Eagle Investment Management, LLC	Decreased	369,575(-8.5%)	$13.8M	0.0%	+19.84%	0
JANE STREET GROUP, LLC	New	356,151	$13.3M	0.0%	-44.82%	39
JPMORGAN CHASE & CO	Increased	347,224(+6235.1%)	$13M	0.0%	-44.29%	45
SILVERCREST ASSET MANAGEMENT GROUP LLC	Increased	313,943(+16.4%)	$11.8M	0.1%	-7.75%	32
STATE STREET CORP	Increased	291,168(+1.9%)	$10.9M	0.0%	+33.30%	28
Nuveen, LLC	Increased	281,914(+494.5%)	$10.6M	0.0%	-38.97%	45
BANK OF AMERICA CORP /DE/	Increased	276,317(+50.5%)	$10.4M	0.0%	-9.95%	38
MILLENNIUM MANAGEMENT LLC	Decreased	253,677(-33.4%)	$9.5M	0.0%	+1.31%	0
SOSquarepoint Ops LLC	Increased	238,766(+115.9%)	$8.9M	0.0%	-30.84%	44

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MECMAYVILLE ENGR CO INC

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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