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MEC

Mayville Engineering Company, Inc.

Company with tickers: MEC

CIK
1766368
CUSIP
578605107
Shares Outstanding
25,494,006
13F Activity (30d)
106 filings 103 filers
Price
$25.82
Market Cap
$679.42M
P/E Ratio
-64.55
EPS (Diluted)
$-0.40
52W High
$28.15
52W Low
$12.10
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 119
Total Value: $241,780,507
Total Shares: 13,469,670
Showing 1–100 of 119 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 119 13F filers · Δ vs Dec 31, 2025
Top Holder
14.9%
Jun 2023 → Mar 2026 · range 11.7% – 29.7%
+0.2 pts
Top 5
39.9%
Jun 2023 → Mar 2026 · range 36.0% – 56.8%
+4.0 pts
Top 10
57.5%
Jun 2023 → Mar 2026 · range 53.6% – 70.5%
+3.8 pts
HHI
498
Jun 2023 → Mar 2026 · range 455 – 1,139
Broadly held +42

Quarterly Activity

vs Dec 31, 2025
New
20
Increased
36
Decreased
40
Sold Out
27
Unchanged
23
Holder count: -7
Institutional value: -7.9%
Shares held: -4.0%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Mid Portolan Capital Management, LLC +308,374 821,136
Mega MILLENNIUM MANAGEMENT LLC +227,772 380,972
Mid ROYCE & ASSOCIATES LP +126,694 751,001
Mid Granahan Investment Management, LLC +119,708 387,470
Large SILVERCREST ASSET MANAGEMENT GROUP LLC +89,740 269,681

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds
Mid CenterBook Partners LP −135,488 120,303
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP −103,189 185,261
Mid NORTHERN TRUST CORP −94,183 185
Mid Ancora Advisors LLC −93,897 32,133
Mega MORGAN STANLEY −82,340 50

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Small Panoramic Capital, LLC 140,000 $2,513,000
Large Empowered Funds, LLC 123,293 $2,213,109
Large Squarepoint Ops LLC 110,569 $1,984,713
Small Integrated Quantitative Investments LLC 50,659 $909,329
Large HighTower Advisors, LLC 44,587 $800,336

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Mega VANGUARD GROUP INC 627,655 $11,749,700
Small 22NW, LP 414,280 $7,755,321
Mega JANE STREET GROUP, LLC 98,874 $1,850,921
Mega VANGUARD GROUP INC 91,238 $1,707,975
Mega RAYMOND JAMES FINANCIAL INC 38,672 $723,939
Filter: New 20 Increased 36 Reduced 40 Sold out 27 Unchanged 23
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Large Allspring Global Investments Holdings, LLC $35,906,281 14.85% 2,000,350 View
Mega DIMENSIONAL FUND ADVISORS LP $16,625,575 6.88% 926,216 View
Mega BlackRock, Inc. $15,829,277 6.55% 881,854 View
Mid Portolan Capital Management, LLC $14,739,391 6.10% 821,136 View
Mid ROYCE & ASSOCIATES LP $13,480,467 5.58% 751,001 View
Small EVR Research LP $11,129,000 4.60% 620,000 View
Large BLAIR WILLIAM & CO/IL $10,147,135 4.20% 565,300 View
Large First Eagle Investment Management, LLC $7,253,146 3.00% 404,075 View
Mid Granahan Investment Management, LLC $6,955,086 2.88% 387,470 View
Mega MILLENNIUM MANAGEMENT LLC $6,838,447 2.83% 380,972 View
Mega AMERIPRISE FINANCIAL INC $6,314,630 2.61% 351,790 View
Mega GEODE CAPITAL MANAGEMENT, LLC $6,028,237 2.49% 335,835 View
Mega STATE STREET CORP $5,131,007 2.12% 285,850 View
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $4,840,773 2.00% 269,681 View
Small JB CAPITAL PARTNERS LP $4,496,690 1.86% 250,512 View
Small Congruence Capital, LLC $4,208,826 1.74% 234,475 View
Large Boston Partners $4,175,833 1.73% 232,637 View
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $3,997,518 1.65% 222,703 View
Mega AMERICAN CENTURY COMPANIES INC $3,979,030 1.65% 221,673 View
Small Roubaix Capital, LLC $3,781,293 1.56% 210,657 View
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $3,325,434 1.38% 185,261 View
Mega BANK OF AMERICA CORP /DE/ Bank $3,295,601 1.36% 183,599 View
Mid Wealthspire Advisors, LLC $2,541,845 1.05% 141,607 View
Small Panoramic Capital, LLC $2,513,000 1.04% 140,000 View
Large Russell Investments Group, Ltd. $2,480,957 1.03% 138,215 View
Large Empowered Funds, LLC $2,213,109 0.92% 123,293 View
Large SEI INVESTMENTS CO $2,205,659 0.91% 122,878 View
Mid CenterBook Partners LP $2,159,438 0.89% 120,303 View
Mega UBS Group AG $2,092,449 0.87% 116,571 View
Large Squarepoint Ops LLC $1,984,713 0.82% 110,569 View
Mid KENNEDY CAPITAL MANAGEMENT LLC $1,916,898 0.79% 106,791 View
Small FORMULA GROWTH LTD $1,795,000 0.74% 100,000 View
Mid OSAIC HOLDINGS, INC. $1,778,916 0.74% 99,104 View
Mid ANCHOR CAPITAL ADVISORS LLC $1,461,883 0.60% 81,442 View
Mid TOCQUEVILLE ASSET MANAGEMENT L.P. $1,276,245 0.53% 71,100 View
Mega GOLDMAN SACHS GROUP INC $1,165,098 0.48% 64,908 View
Large RENAISSANCE TECHNOLOGIES LLC $1,129,055 0.47% 62,900 View
Mega CITADEL ADVISORS LLC $1,019,308 0.42% 56,786 View
Small Integrated Quantitative Investments LLC $909,329 0.38% 50,659 View
Mega Nuveen, LLC $851,152 0.35% 47,418 View
Small SummerHaven Investment Management, LLC $813,583 0.34% 45,325 View
Large HighTower Advisors, LLC $800,336 0.33% 44,587 View
Mid JOURNEY STRATEGIC WEALTH LLC $793,497 0.33% 44,206 View
Mid XTX Topco Ltd $744,530 0.31% 41,478 View
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $719,759 0.30% 40,098 View
Small Numerai GP LLC $713,602 0.30% 39,755 View
Small SHEETS SMITH WEALTH MANAGEMENT $699,601 0.29% 38,975 View
Mega Bank of New York Mellon Corp Bank $697,375 0.29% 38,851 View
Large PANAGORA ASSET MANAGEMENT INC $659,931 0.27% 36,765 View
Small Legato Capital Management LLC $640,779 0.27% 35,698 View
Mega TWO SIGMA INVESTMENTS, LP $623,008 0.26% 34,708 View
Large STATE OF WISCONSIN INVESTMENT BOARD $579,102 0.24% 32,262 View
Mid Ancora Advisors LLC $576,787 0.24% 32,133 View
Large Janney Montgomery Scott LLC $561,924 0.23% 31,305 View
Mid North Star Investment Management Corp. $538,500 0.22% 30,000 View
Mega Invesco Ltd. $485,151 0.20% 27,028 View
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC $473,341 0.20% 26,370 View
Mega LPL Financial LLC $390,789 0.16% 21,771 View
Mega AQR CAPITAL MANAGEMENT LLC $365,872 0.15% 20,383 View
Mega ENVESTNET ASSET MANAGEMENT INC $364,402 0.15% 20,301 View
Mid NEEDHAM INVESTMENT MANAGEMENT LLC $359,000 0.15% 20,000 View
Mega BARCLAYS PLC $341,552 0.14% 19,028 View
Mid SummitTX Capital, L.P. $335,593 0.14% 18,696 View
Mega RHUMBLINE ADVISERS $326,690 0.14% 18,200 View
Mid Gradient Investments LLC $307,016 0.13% 17,104 View
Small Johnson Financial Group, Inc. $295,726 0.12% 16,475 View
Micro Worth Venture Partners, LLC Venture Capital $271,224 0.11% 15,110 View
Small Avior Wealth Management, LLC $267,796 0.11% 14,919 View
Mega FRANKLIN RESOURCES INC $242,827 0.10% 13,528 View
Mega ALLIANCEBERNSTEIN L.P. $229,939 0.10% 12,810 View
Mega WELLS FARGO & COMPANY/MN $225,613 0.09% 12,569 View
Small MIRABELLA FINANCIAL SERVICES LLP $223,118 0.09% 12,430 View
Mid Brevan Howard Capital Management LP $215,812 0.09% 12,023 View
Small Heck Capital Advisors, LLC $206,317 0.09% 11,494 View
Mega DEUTSCHE BANK AG\ Bank $183,754 0.08% 10,237 View
Mid Aquatic Capital Management LLC $159,772 0.07% 8,901 View
Large MetLife Investment Management, LLC $142,846 0.06% 7,958 View
Mid HARBOR CAPITAL ADVISORS, INC. $139,740 0.06% 7,785 View
Mid HARBOUR INVESTMENTS, INC. $138,215 0.06% 7,700 View
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $112,025 0.05% 6,241 View
Mid JONES FINANCIAL COMPANIES LLLP $110,948 0.05% 6,181 View
Mega JPMORGAN CHASE & CO $98,383 0.04% 5,481 View
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $96,840 0.04% 5,395 View
Large Police & Firemen's Retirement System of New Jersey Pension $83,485 0.03% 4,651 View
Mega FMR LLC $76,484 0.03% 4,261 View
Mid State of Alaska, Department of Revenue $70,058 0.03% 3,903 View
Mega ROYAL BANK OF CANADA Bank $61,873 0.03% 3,447 View
Mega BNP PARIBAS ARBITRAGE, SA $50,224 0.02% 2,798 View
Mega CITIGROUP INC $29,382 0.01% 1,637 View
Mid Ameritas Investment Partners, Inc. $26,099 0.01% 1,454 View
Mid Tower Research Capital LLC (TRC) $22,993 0.01% 1,281 View
Mega Legal & General Group Plc $22,617 0.01% 1,260 View
Micro Avion Wealth $17,950 0.01% 1,000 View
Large CWM, LLC $16,549 0.01% 922 View
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $12,708 0.01% 708 View
Mid MAI Capital Management $7,431 0.00% 414 View
Mid Sterling Capital Management LLC $7,197 0.00% 401 View
Large Rockefeller Capital Management L.P. $4,954 0.00% 276 View
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $4,110 0.00% 229 View
Mid NORTHERN TRUST CORP Bank $3,320 0.00% 185 View
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