Mayville Engineering Company, Inc.

MEC

Exchange: NYSE
Industry: Metal Forgings & Stampings
SEC CIK: 0001766368

SEC filings (opens in a new tab)

In the last 90 days, Mayville Engineering Company, Inc. insiders filed 0 open-market purchases and 1 sale; 155 institutions reported holding it in 13F filings for Q2 2026, worth $790.6M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Mayville Engineering Company, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of MEC: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Q4 2025	Change
Holders	104	123	+19
Shares	13.3M	13.9M	+603.3K (+4.5%)
Value	$183.6M	$260.4M	+$76.8M (+41.8%)

New holders (30)

Institutions that held Mayville Engineering Company, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to MEC in Q4 2025
Institution	Shares	Value	% of portfolio
EVR Research LP	605,000	$11.3M	6.11%
Portolan Capital Management, LLC	512,762	$9.60M	0.51%
Congruence Capital, LLC	208,102	$3.90M	1.43%
Silvercrest Asset Management Group LLC	179,941	$3.37M	0.02%
Millennium Management LLC	153,200	$2.87M	0.00%
Kennedy Capital Management, Inc.	104,345	$1.95M	0.04%
Citadel Advisors LLC	103,463	$1.94M	0.00%
Formula Growth Ltd	40,000	$748.8K	0.29%
Essential Investment Partners LLC	34,269	$641.5K	0.60%
Sentinus, LLC	30,000	$561.6K	0.05%
Journey Strategic Wealth LLC	29,185	$546.3K	0.01%
XTX Topco Ltd	21,334	$399.4K	0.01%
D. E. Shaw & Co., Inc.	19,416	$363.5K	0.00%
Johnson Financial Group, Inc.	16,475	$308.4K	0.01%
SummitTX Capital, L.P.	15,118	$283.0K	0.01%
Worth Venture Partners, LLC	13,735	$257.1K	1.86%
HRT Financial LP	12,933	$242.0K	0.00%
Boothbay Fund Management, LLC	12,160	$227.6K	0.01%
Deutsche Bank AG	8,249	$154.4K	0.00%
Quantbot Technologies LP	7,827	$146.5K	0.00%
Picton Mahoney Asset Management	5,800	$108.6K	0.00%
Aquatic Capital Management LLC	4,383	$82.0K	0.00%
State of Alaska, Department of Revenue	3,903	$73.0K	0.00%
Quarry LP	659	$12.3K	0.00%
US Bancorp	285	$5.33K	0.00%
MAI Capital Management	141	$2.64K	0.00%
UBS Asset Management Americas Inc	47	$880	0.00%
Bare Financial Services, Inc	37	$693	0.00%
Torren Management, LLC	26	$487	0.00%
Covestor Ltd	11	$0	0.00%

Sold out (11)

Institutions that held Mayville Engineering Company, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of MEC in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Empowered Funds, LLC	121,880	$1.68M
Globeflex Capital L P	116,468	$1.60M
Martingale Asset Management L P	35,610	$490.0K
Victory Capital Management Inc	26,731	$367.8K
EntryPoint Capital, LLC	24,098	$331.6K
STRS Ohio	22,300	$306.8K
Prudential Financial Inc	19,025	$261.8K
State of Wyoming	12,315	$169.5K
New York State Teachers Retirement System	1,287	$18.0K
Advisory Services Network, LLC	210	$2.89K
CIBC Private Wealth Group, LLC	80	$1.10K