Company · Ownership research

Mayville Engineering Company, Inc. MEC

CIK 0001766368 · CUSIP 578605107

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 578605107 (MEC), not CUSIP 578605907 (MEC), CUSIP 578605957 (MEC), and does not merge CUSIPs.

This page lists the top 20 of 66 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$16.76M 1,068,749 shares	0.03%	-4.17K(-0.40%)Reduced	SEC filing ↗ Nov 4, 2026	▾
02	FMR LLC CIK 315066 · View history	$12.69M 846,181 shares	0.00%	-433.99K(-33.90%)Reduced	SEC filing ↗ Nov 10, 2026	▾
03	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$10.28M 685,124 shares	0.00%	-97.15K(-12.40%)Reduced	SEC filing ↗ Nov 4, 2026	▾
04	ROYCE & ASSOCIATES LP CIK 906304 · View history	$10.01M 667,009 shares	0.09%	-85.07K(-11.30%)Reduced	SEC filing ↗ Nov 9, 2026	▾
05	BLAIR WILLIAM & CO/IL CIK 902367 · View history	$8.51M 567,536 shares	0.02%	+20.82K(+3.80%)Added	SEC filing ↗ Nov 10, 2026	▾
06	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.67M 511,450 shares	0.00%	+136.87K(+36.50%)Added	SEC filing ↗ Nov 6, 2026	▾
07	Nuveen, LLC CIK 1871926 · View history	$7.34M 489,009 shares	0.00%	+207.09K(+73.50%)Added	SEC filing ↗ Nov 10, 2026	▾
08	STATE STREET CORP CIK 93751 · View history	$5.20M 346,613 shares	0.00%	+55.45K(+19.00%)Added	SEC filing ↗ Nov 12, 2026	▾
09	CenterBook Partners LP CIK 1872738 · View history	$5.12M 341,000 shares	0.23%	+310.01K(+1,000.30%)Added	SEC filing ↗ Nov 2, 2026	▾
10	Squarepoint Ops LLC CIK 1642575 · View history	$4.91M 327,113 shares	0.01%	+88.35K(+37.00%)Added	SEC filing ↗ Nov 9, 2026	▾
11	UBS Group AG CIK 1610520 · View history	$4.75M 316,419 shares	0.00%	+233.76K(+282.80%)Added	SEC filing ↗ Nov 10, 2026	▾
12	First Eagle Investment Management, LLC CIK 1325447 · View history	$4.04M 269,294 shares	0.01%	-100.28K(-27.10%)Reduced	SEC filing ↗ Nov 10, 2026	▾
13	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$2.51M 167,319 shares	0.00%	+139.32K(+497.60%)Added	SEC filing ↗ Nov 12, 2026	▾
14	HUNTER ASSOCIATES INVESTMENT MANAGEMENT LLC CIK 1380137 · View history	$2.46M 164,045 shares	0.29%	+56.52K(+52.60%)Added	SEC filing ↗ Oct 26, 2026	▾
15	BNP PARIBAS FINANCIAL MARKETS CIK 1166588 · View history	$2.10M 139,757 shares	0.00%	+27.30K(+24.30%)Added	SEC filing ↗ Nov 12, 2026	▾
16	Bastion Asset Management Inc. CIK 1977794 · View history	$1.95M 128,210 shares	0.85%	+128.21KNew	SEC filing ↗ Nov 5, 2026	▾
17	ANCHOR CAPITAL ADVISORS LLC CIK 813933 · View history	$1.62M 108,067 shares	0.05%	+27.18K(+33.60%)Added	SEC filing ↗ Nov 5, 2026	▾
18	DIAMOND HILL CAPITAL MANAGEMENT INC CIK 1217541 · View history	$1.58M 105,520 shares	0.02%	+105.52KNew	SEC filing ↗ Nov 10, 2026	▾
19	Russell Investments Group, Ltd. CIK 1692234 · View history	$1.51M 100,945 shares	0.00%	-24.57K(-19.60%)Reduced	SEC filing ↗ Nov 6, 2026	▾
20	SEI INVESTMENTS CO CIK 350894 · View history	$1.30M 86,546 shares	0.00%	-32.06K(-27.00%)Reduced	SEC filing ↗ Nov 10, 2026	▾

Showing 20 / 66 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

8,230,341

Not deduplicated across managers

Disclosed value

$124.37M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Mayville Engineering Company, Inc. · Q3 2026

Explore all 66 reporting institutions.

This page includes 20 of 66 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.