Mayville Engineering Company, Inc.

MECNYSE

$16.44+0.76 (+4.85%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Mayville Engineering Company, Inc. price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+21.0%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Portolan Capital Management, LLC	5.10%	$48.7M	1.82%	Add 58.23%
FMR LLC	5.02%	$48M	0.00%	Not reported
BlackRock, Inc.	4.64%	$44.3M	0.00%	Not reported
Driehaus Capital Management LLC	3.32%	$31.7M	0.18%	New Not reported
Summit Partners Public Asset Management, LLC	3.14%	$30M	0.53%	New Not reported
Dimensional Fund Advisors LP	3.07%	$29.3M	0.01%	Not reported
Royce & Associates LP	2.95%	$28.2M	0.23%	Not reported
Vanguard Capital Management LLC	2.92%	$27.9M	0.00%	Not reported
First Eagle Investment Management, LLC	2.90%	$27.7M	0.02%	Add 82.92%
Jupiter Topco LLC	2.26%	$21.5M	0.01%	Not reported
Blair William & Co	2.14%	$20.5M	0.05%	Reduce 3.29%
Wellington Management Group LLP	1.87%	$17.9M	0.00%	New Not reported
EVR Research LP	1.73%	$16.6M	8.17%	Reduce 28.72%
Geode Capital Management, LLC	1.47%	$14M	0.00%	Not reported
Jane Street Group, LLC	1.40%	$13.3M	0.00%	Not reported
JPMorgan Chase & Co	1.36%	$13M	0.00%	Not reported
Kennedy Capital Management LLC	1.32%	$12.6M	0.22%	Add 214.99%
Ophir Asset Management Pty Ltd	1.28%	$12.2M	1.01%	New Not reported
Granahan Investment Management, LLC	1.27%	$12.1M	0.43%	Not reported
Silvercrest Asset Management Group LLC	1.23%	$11.8M	0.08%	Add 16.41%
State Street Corp	1.14%	$10.9M	0.00%	Not reported
Nuveen, LLC	1.11%	$10.6M	0.00%	Not reported
Bank of America Corp	1.08%	$10.4M	0.00%	Not reported
Millennium Management LLC	0.99%	$9.5M	0.00%	Not reported
JB Capital Partners LP	0.98%	$9.38M	1.45%	Not reported
Squarepoint Ops LLC	0.94%	$8.94M	0.01%	Not reported
Congruence Capital, LLC	0.92%	$8.82M	2.31%	Add 0.47%
Bridgeway Capital Management, LLC	0.79%	$7.53M	0.13%	Not reported
Two Sigma Investments, LP	0.78%	$7.45M	0.01%	Not reported
Citadel Advisors LLC	0.78%	$7.44M	0.00%	Not reported
Osterweis Capital Management Inc	0.68%	$6.54M	0.31%	New Not reported
Tudor Investment Corp Et Al	0.67%	$6.36M	0.01%	Not reported
Lord, Abbett & Co. LLC	0.60%	$5.7M	0.02%	New Not reported
Wealthspire Advisors, LLC	0.56%	$5.3M	0.03%	Not reported
Pillsbury Lake Capital LLC	0.54%	$5.12M	1.40%	New Not reported
Informed Momentum Co LLC	0.51%	$4.84M	0.43%	Not reported
Russell Investments Group, Ltd.	0.49%	$4.7M	0.00%	Not reported
Sei Investments Co	0.47%	$4.44M	0.00%	Not reported
Empowered Funds, LLC	0.46%	$4.37M	0.02%	Reduce 5.45%
Northern Trust Corp	0.45%	$4.31M	0.00%	Not reported
BNP Paribas Financial Markets	0.44%	$4.21M	0.00%	Not reported
Needham Investment Management LLC	0.43%	$4.12M	0.12%	Add 450.00%
Hunter Associates Investment Management LLC	0.42%	$4.03M	0.46%	New Not reported
Trexquant Investment LP	0.39%	$3.77M	0.02%	Not reported
Morgan Stanley	0.39%	$3.75M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.39%	$3.7M	0.00%	Not reported
Vanguard Portfolio Management LLC	0.39%	$3.68M	0.00%	Not reported
Walleye Capital LLC	0.37%	$3.5M	0.01%	Not reported
Qube Research & Technologies Ltd	0.34%	$3.26M	0.00%	Not reported
Susquehanna International Group, LLP	0.34%	$3.2M	0.00%	Not reported

50 of 139 holders

Activity score

Premium

100

WEAK

STRONG

Unlock

AI Activity Analysis

Premium

Coming soonAI reads of insider, institutional and company activity will appear here for Premium accounts.

Historical Activity Patterns

Premium

Historical Activity PatternsHistorical periods where multiple activity categories converged, with subsequent market performance shown for context.Unlock