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.

Q2 2026 vs. Q1 2026

How the institutions holding Mayville Engineering Company, Inc. changed between Q1 2026 and Q2 2026.

All holders in Q2 2026 All holders in Q1 2026

13F holders of MEC: Q1 2026 compared with Q2 2026
Measure	Q1 2026	Of which not filed for Q2 2026	Q2 2026	Change
Holders	124	2	155	+33
Shares	14.4M	45.1K	21.2M	+6.82M (+47.5%)
Value	$258.4M	$810.0K	$790.6M	+$533.0M (+206.9%)

2 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (53)

Institutions that held Mayville Engineering Company, Inc. at the end of Q2 2026 but not at the end of Q1 2026.

Institutions new to MEC in Q2 2026
Institution	Shares	Value	% of portfolio
Driehaus Capital Management LLC	846,354	$31.7M	0.18%
Summit Partners Public Asset Management, LLC	800,000	$30.0M	0.78%
Jupiter Topco LLC	575,278	$21.5M	0.01%
Wellington Management Group LLP	477,583	$17.9M	0.00%
Jane Street Group, LLC	356,151	$13.3M	0.01%
Ophir Asset Management Pty Ltd	326,699	$12.2M	1.01%
AWM Investment Company, Inc.	180,000	$6.74M	0.59%
Osterweis Capital Management Inc	174,600	$6.54M	0.31%
Tudor Investment Corp Et Al	169,848	$6.36M	0.03%
Lord, Abbett & Co. LLC	152,175	$5.70M	0.02%
Pillsbury Lake Capital LLC	136,746	$5.12M	1.41%
EAM Investors, LLC	129,182	$4.84M	0.43%
Hunter Associates Investment Management LLC	107,528	$4.03M	0.46%
Trexquant Investment LP	100,517	$3.77M	0.02%
Walleye Capital LLC	93,444	$3.50M	0.02%
Qube Research & Technologies Ltd	87,129	$3.26M	0.00%
Susquehanna International Group, LLP	85,462	$3.20M	0.00%
Polen Capital Management LLC	61,827	$2.32M	0.02%
Balyasny Asset Management LLC	47,052	$1.76M	0.00%
GatePass Capital, LLC	40,000	$1.50M	0.57%
Diametric Capital, LP	35,727	$1.34M	0.14%
Boothbay Fund Management, LLC	30,584	$1.15M	0.02%
Kornitzer Capital Management Inc	29,587	$1.11M	0.02%
Divisadero Street Capital Management, LP	27,482	$1.03M	0.02%
Quadrature Capital Ltd	26,477	$991.8K	0.01%
Prelude Capital Management, LLC	23,969	$897.9K	0.07%
HRT Financial LP	21,568	$807.0K	0.00%
Wesbanco Bank Inc	18,000	$674.3K	0.02%
Caption Management, LLC	14,092	$527.9K	0.02%
Wealth Enhancement Advisory Services, LLC	13,946	$470.3K	0.00%
Creative Planning	12,159	$455.5K	0.00%
Price T Rowe Associates Inc	12,026	$451.0K	0.00%
EntryPoint Capital, LLC	10,793	$404.3K	0.10%
Delta Capital Management LLC	9,920	$372.0K	0.17%
Schonfeld Strategic Advisors LLC	9,606	$359.8K	0.00%
Centiva Capital, LP	9,504	$356.0K	0.01%
Raymond James Financial Inc	7,490	$280.6K	0.00%
Quantbot Technologies LP	7,027	$263.2K	0.01%
Connor, Clark & Lunn Investment Management Ltd.	6,918	$259.1K	0.00%
Calamos Advisors LLC	6,883	$257.8K	0.00%
Gsa Capital Partners LLP	6,814	$255.0K	0.02%
Engineers Gate Manager LP	5,683	$212.9K	0.00%
Occudo Quantitative Strategies LP	5,634	$211.1K	0.01%
Persistent Asset Partners Ltd	2,147	$80.4K	0.03%
Simplex Trading, LLC	1,529	$57.3K	0.00%
Caitong International Asset Management Co., Ltd	943	$35.3K	0.00%
SRS Capital Advisors, Inc.	709	$26.6K	0.00%
Bard Associates Inc	500	$18.7K	0.00%
Clearstead Advisors, LLC	131	$4.91K	0.00%
Quarry LP	44	$1.65K	0.00%
Bruce G. Allen Investments, LLC	18	$674	0.00%
Signaturefd, LLC	13	$487	0.00%
National Bank of Canada	4	$149	0.00%

Sold out (20)

Institutions that held Mayville Engineering Company, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.

Institutions that sold out of MEC in Q2 2026
Institution	Shares, Q1 2026	Value, Q1 2026
Ameriprise Financial Inc	351,790	$6.31M
Roubaix Capital, LLC	210,657	$3.78M
Arrowstreet Capital, Limited Partnership	185,261	$3.33M
Integrated Quantitative Investments LLC	50,659	$909.3K
HighTower Advisors, LLC	44,587	$800.3K
Panagora Asset Management Inc	36,765	$659.9K
Legato Capital Management LLC	35,698	$640.8K
Ancora Advisors, LLC	32,133	$576.8K
SummitTX Capital, L.P.	18,696	$335.6K
Gradient Investments LLC	17,104	$307.0K
Alliancebernstein L.P.	12,810	$239.8K
Mirabella Financial Services LLP	12,430	$223.1K
MAI Capital Management	414	$7.43K
Optiver Holding B.V.	124	$2.23K
Advisory Services Network, LLC	115	$2.06K
Annis Gardner Whiting Capital Advisors, LLC	80	$1.44K
Bayban	43	$772
Vermillion Wealth Management, Inc.	30	$539
True Wealth Design, LLC	9	$162
Root Financial Partners, LLC	5	$90

Not filed for Q2 2026 yet (2)

Institutions that held Mayville Engineering Company, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MEC in Q1 2026 that haven't filed for Q2 2026
Institution	Shares, Q1 2026	Value, Q1 2026
Journey Strategic Wealth LLC	44,206	$793.5K
CWM, LLC	922	$16.6K