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Disclosery

MEC MAYVILLE ENGR CO INC

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COMMON STOCK (common), issuer CIK 1766368

114 managers (114 13F filers) reported a position in MEC shares at 2025-06-30, 12,642,223 shares in all. 13 filers opened a position and 18 filers sold out during the quarter.

Managers
114
13F filers
114
New
13
Added
47
Reduced
31
Sold out
18
Shares held by filers
12,642,223

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Allspring Global Investments Holdings, …in group Allspring Global Investments …2,446,090$39.8M0.07%+5,01313F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.913,189$14.6M<0.01%+63,59813F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC882,195$14.1M<0.01%+266,04913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP814,034$13M<0.01%+41,46613F-HRTimelineGroup
TOCQUEVILLE ASSET MANAGEMENT L.P.in group TOCQUEVILLE ASSET MANAGEMENT …571,187$9.12M0.14%-50,01713F-HRTimelineGroup
ROYCE & ASSOCIATES LP558,849$8.92M0.09%-32,47013F-HRTimeline
Granahan Investment Management, LLC498,305$7.95M0.32%+20,26713F-HRTimeline
BLAIR WILLIAM & CO/IL373,448$5.96M0.02%+281,19813F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC359,780$5.74M0.12%+50,20013F-HRTimelineGroup
First Eagle Investment Management, LLCin group First Eagle Investment Manage…354,075$5.65M0.01%+2,20013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC318,321$5.08M<0.01%+27,55213F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC306,982$4.9M<0.01%+54,84313F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …268,635$4.29M<0.01%+2,23513F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP265,050$4.23M<0.01%+12,68113F-HRTimelineGroup
JB CAPITAL PARTNERS LP250,512$4M0.74%013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/227,699$3.63M<0.01%-12,52713F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC222,654$3.55M0.08%+9,77913F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…216,179$3.45M<0.01%+15,86713F-HRTimelineGroup
22NW, LP155,450$2.48M1.56%new13F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC144,000$2.3M<0.01%+58,10013F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC136,383$2.18M0.01%+3,88513F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.131,589$2.1M<0.01%-13,28113F-HR/ATimelineGroup
GLOBEFLEX CAPITAL L P116,468$1.86M0.15%013F-HRTimeline
Empowered Funds, LLC107,986$1.72M0.02%+9,77913F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP101,738$1.62M<0.01%+1,82913F-HRTimelineGroup
Roubaix Capital, LLC101,138$1.61M0.77%new13F-HRTimeline
ANCHOR CAPITAL ADVISORS LLC97,638$1.56M0.05%-3,21113F-HRTimeline
Wealthspire Advisors, LLC95,415$1.52M0.01%013F-HRTimeline
CenterBook Partners LP95,086$1.52M0.08%-3,46713F-HRTimeline
UBS Group AGin group UBS Group AG87,534$1.4M<0.01%+61,37513F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC85,571$1.37M<0.01%-27,96313F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP64,566$1.03M<0.01%-36,80613F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY62,302$994K<0.01%+33,45113F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO51,490$822K<0.01%+6,10313F-HRTimelineGroup
Nuveen, LLCin group TIAA49,337$787K<0.01%+1,42013F-HRTimelineGroup
MARTINGALE ASSET MANAGEMENT L P43,516$695K0.02%-1,29913F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC40,502$646K<0.01%+10,86513F-HR/ATimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC39,647$633K<0.01%+2,95813F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp39,228$626K<0.01%+2,12613F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co39,131$625K<0.01%+4,87913F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC38,987$622K<0.01%new13F-HRTimeline
SHEETS SMITH WEALTH MANAGEMENT38,585$616K0.07%+68013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson38,013$607K<0.01%new13F-HRTimelineGroup
Janney Montgomery Scott LLC36,499$583K<0.01%+19013F-HRTimeline
STRS OHIO31,100$496K<0.01%-2,40013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA30,793$492K<0.01%+12,68813F-HR/ATimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC30,594$488K<0.01%+1713F-HRTimeline
Perritt Capital Management Inc30,000$479K0.25%013F-HR/ATimeline
Invesco Ltd.in group Invesco Ltd.29,422$470K<0.01%-3,34613F-HRTimelineGroup
Expect Equity LLC28,233$451K0.48%-26,34113F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…28,186$450K<0.01%+4,44913F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC27,064$431K<0.01%-1,50913F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC25,374$405K<0.01%-44,43513F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC25,280$403K<0.01%-3,06813F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC24,447$390K<0.01%+9,02613F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD24,297$388K<0.01%+9,50013F-HRTimeline
Avior Wealth Management, LLC22,919$366K0.01%013F-HRTimeline
Gradient Investments LLCin group Gradient Investments LLC21,569$344K0.01%-87513F-HRTimelineGroup
LPL Financial LLC20,846$333K<0.01%-4,00013F-HRTimeline
RHUMBLINE ADVISERS19,969$319K<0.01%+1,52613F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC19,225$307K<0.01%-65,25013F-HR/ATimelineGroup
BAILARD, INC.17,800$284K0.01%new13F-HRTimeline
SeaBridge Investment Advisors LLC16,356$261K0.05%+1113F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC15,989$255K<0.01%-127,75813F-HRTimelineGroup
EntryPoint Capital, LLC15,914$254K0.13%-57713F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources15,859$253K<0.01%013F-HRTimelineGroup
Sterling Capital Management LLC15,816$252K<0.01%+13013F-HR/ATimeline
VICTORY CAPITAL MANAGEMENT INC15,181$242K<0.01%+1,79613F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN14,244$227K<0.01%+33313F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…12,652$213K<0.01%-3,13913F-HRTimeline
ALLIANCEBERNSTEIN L.P.13,190$211K<0.01%new13F-HRTimeline
TRANSATLANTIQUE PRIVATE WEALTH LLC12,862$205K0.08%013F-HRTimeline
State of Wyoming12,743$203K0.02%-5,33513F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …11,132$178K<0.01%-21613F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…10,834$173K<0.01%013F-HRTimeline
DELTA CAPITAL MANAGEMENT LLC10,380$166K0.09%013F-HRTimeline
CHICAGO TRUST Co NA10,325$165K0.02%new13F-HRTimeline
CANTOR FITZGERALD, L. P.in group CANTOR FITZGERALD, L. P.10,000$160K<0.01%new13F-HRTimelineGroup
SG Americas Securities, LLC9,128$146K<0.01%new13F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…7,958$127K<0.01%+1,48113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO7,936$127K<0.01%+1,35913F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…7,791$124K<0.01%+18913F-HRTimelineGroup
HARBOUR INVESTMENTS, INC.7,700$123K<0.01%013F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\7,213$115K<0.01%-2,99413F-HRTimelineGroup
AlphaQuest LLC6,609$105K0.01%-1,27013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC5,735$91.5K<0.01%-3,92113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND5,395$86.1K<0.01%013F-HR/ATimeline
FMR LLCin group FMR LLC3,145$50.2K<0.01%+4513F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\2,597$41.4K<0.01%-25613F-HRTimelineGroup
Police & Firemen's Retirement System of…2,557$40.8K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,917$30.6K<0.01%+1,03013F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,454$23.2K<0.01%+54213F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS1,316$21K<0.01%-3,64313F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc1,260$20.1K<0.01%013F-HRTimelineGroup
CWM, LLCin group CWM, LLC1,187$19K<0.01%+97313F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…1,161$19K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,114$18K<0.01%new13F-HRTimelineGroup
Avion Wealth1,000$15K<0.01%013F-HR/ATimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…922$14.7K<0.01%013F-HRTimeline
COMERICA BANK513$8.18K<0.01%+213F-HRTimeline
AMALGAMATED BANK372$6K<0.01%013F-HRTimeline
Nemes Rush Group LLC200$3.19K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…115$1.83K<0.01%new13F-HRTimelineGroup
GAMMA Investing LLC91$1.45K<0.01%-13513F-HRTimeline
NISA INVESTMENT ADVISORS, LLC76$1.21K<0.01%+4713F-HRTimeline
Allworth Financial LP59$942<0.01%new13F-HRTimeline
Parkside Financial Bank & Trust35$559<0.01%new13F-HRTimeline
Vermillion Wealth Management, Inc.30$479<0.01%013F-HRTimeline
MAI Capital Management25$399<0.01%013F-HRTimeline
Essential Partners LLC18$287<0.01%13F-HRTimeline
True Wealth Design, LLC11$176<0.01%-213F-HRTimeline
IFP Advisors, Inc0$176<0.01%013F-HRTimelineAmount filed as zero, left out of ratios.
Covestor Ltd5$00%-4913F-HRTimelineValue filed as zero, left out of ratios.
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.