Mayville Engineering Co.MEC
13F holders, Q2 2025 (June 30)112holders −4
13new positions
18sold out
3famous investors
$16.02avg. 13F price*
At the end of Q2 2025, 112 institutions reported holding Mayville Engineering Co. Inc. (MEC) in their 13F filings, down 4 from Q1 2025. 13 opened new positions and 18 sold out. The largest holders were Allspring Global Investments Holdings, LLC ($39.8M), BlackRock, Inc. ($14.6M) and Vanguard Group Inc. ($14.1M). 3 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Mayville Engineering Co. Inc.
- CUSIP
- 578605107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $6.3M |
| Exits | 18 | $10.8M |
All 13F filers, Q1 2025 → Q2 2025: 1,491,086 shares bought and 1,286,076 shares sold, net +205,010 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 112 holders
| Allspring Global Investments Holdings, LLC | 0.07% | Add +0.2% | 2,446,090 | $39.8M |
| BlackRock, Inc. | 0.00% | Add +7.5% | 913,189 | $14.6M |
| Vanguard Group Inc. | 0.00% | Add +43.2% | 882,195 | $14.1M |
| Dimensional Fund Advisors LP | 0.00% | Add +5.4% | 814,034 | $13.0M |
| Tocqueville Asset Management L.P. | 0.14% | Reduce -8.1% | 571,187 | $9.1M |
| Royce & Associates LP | 0.09% | Reduce -5.5% | 558,849 | $8.9M |
| Granahan Investment Management, LLC | 0.32% | Add +4.2% | 498,305 | $8.0M |
| Blair William & Co. | 0.02% | Add +304.8% | 373,448 | $6.0M |
| Ancora Advisors LLC | 0.12% | Add +16.2% | 359,780 | $5.7M |
| First Eagle Investment Management, LLC | 0.01% | Add +0.6% | 354,075 | $5.7M |
| Geode Capital Management, LLC | 0.00% | Add +9.5% | 318,321 | $5.1M |
| American Century Companies Inc. | 0.00% | Add +21.8% | 306,982 | $4.9M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +0.8% | 268,635 | $4.3M |
| State Street Corp. | 0.00% | Add +5.0% | 265,050 | $4.2M |
| JB Capital Partners LP | 0.74% | No change | 250,512 | $4.0M |
| Bank of America Corp. | 0.00% | Reduce -5.2% | 227,699 | $3.6M |
| Bridgeway Capital Management, LLC | 0.08% | Add +4.6% | 222,654 | $3.6M |
| Russell Investments Group, Ltd. | 0.00% | Add +7.9% | 216,179 | $3.5M |
| 22NW, LP | 1.56% | New | 155,450 | $2.5M |
| Renaissance Technologies | 0.00% | Add +67.6% | 144,000 | $2.3M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +2.9% | 136,383 | $2.2M |
| Osaic Holdings, Inc. | 0.00% | Reduce -9.2% | 131,589 | $2.1M |
| Globeflex Capital L P | 0.15% | No change | 116,468 | $1.9M |
| Empowered Funds, LLC | 0.02% | Add +10.0% | 107,986 | $1.7M |
| Northern Trust Corp. | 0.00% | Add +1.8% | 101,738 | $1.6M |
| Roubaix Capital, LLC | 0.77% | New | 101,138 | $1.6M |
| Anchor Capital Advisors LLC | 0.05% | Reduce -3.2% | 97,638 | $1.6M |
| Wealthspire Advisors, LLC | 0.01% | No change | 95,415 | $1.5M |
| CenterBook Partners LP | 0.08% | Reduce -3.5% | 95,086 | $1.5M |
| UBS Group AG | 0.00% | Add +234.6% | 87,534 | $1.4M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -24.6% | 85,571 | $1.4M |
| Marshall Wace, LLP | 0.00% | Reduce -36.3% | 64,566 | $1.0M |
| Morgan Stanley | 0.00% | Add +115.9% | 62,302 | $994K |
| Sei Investments Co. | 0.00% | Add +13.4% | 51,490 | $822K |
| Nuveen, LLC | 0.00% | Add +3.0% | 49,337 | $787K |
| Martingale Asset Management L P | 0.02% | Reduce -2.9% | 43,516 | $695K |
| Barclays PLC | 0.00% | Add +36.7% | 40,502 | $646K |
| Ameriprise Financial Inc. | 0.00% | Add +8.1% | 39,647 | $633K |
| Bank of New York Mellon Corp | 0.00% | Add +5.7% | 39,228 | $626K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +14.2% | 39,131 | $625K |
| Panagora Asset Management Inc. | 0.00% | New | 38,987 | $622K |
| Sheets Smith Wealth Management | 0.07% | Add +1.8% | 38,585 | $616K |
| Janus Henderson Group PLC | 0.00% | New | 38,013 | $607K |
| Janney Montgomery Scott LLC | 0.00% | Add +0.5% | 36,499 | $583K |
| STRS Ohio | 0.00% | Reduce -7.2% | 31,100 | $496K |
| Royal Bank of Canada | 0.00% | Add +70.1% | 30,793 | $492K |
| O'shaughnessy Asset Management, LLC | 0.00% | Add +0.1% | 30,594 | $488K |
| Perritt Capital Management Inc | 0.25% | No change | 30,000 | $479K |
| Invesco Ltd. | 0.00% | Reduce -10.2% | 29,422 | $470K |
| Expect Equity LLC | 0.48% | Reduce -48.3% | 28,233 | $451K |
| Susquehanna International Group, LLP | 0.00% | Add +18.7% | 28,186 | $450K |
| Lazard Asset Management LLC | 0.00% | Reduce -5.3% | 27,064 | $431K |
| AQR Capital Management | 0.00% | Reduce -63.6% | 25,374 | $405K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -10.8% | 25,280 | $403K |
| Raymond James Financial Inc. | 0.00% | Add +58.5% | 24,447 | $390K |
| State of Wisconsin Investment Board | 0.00% | Add +64.2% | 24,297 | $388K |
| Avior Wealth Management, LLC | 0.01% | No change | 22,919 | $366K |
| Gradient Investments LLC | 0.01% | Reduce -3.9% | 21,569 | $344K |
| LPL Financial LLC | 0.00% | Reduce -16.1% | 20,846 | $333K |
| Rhumbline Advisers | 0.00% | Add +8.3% | 19,969 | $319K |
| Squarepoint Ops LLC | 0.00% | Reduce -77.2% | 19,225 | $307K |
| Bailard, Inc. | 0.01% | New | 17,800 | $284K |
| SeaBridge Investment Advisors LLC | 0.05% | Add +0.1% | 16,356 | $261K |
| Citadel Advisors | 0.00% | Reduce -88.9% | 15,989 | $255K |
| EntryPoint Capital, LLC | 0.13% | Reduce -3.5% | 15,914 | $254K |
| Franklin Resources Inc. | 0.00% | No change | 15,859 | $253K |
| Sterling Capital Management LLC | 0.00% | Add +0.8% | 15,816 | $252K |
| Victory Capital Management Inc. | 0.00% | Add +13.4% | 15,181 | $242K |
| Wells Fargo & Company | 0.00% | Add +2.4% | 14,244 | $227K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -19.9% | 12,652 | $213K |
| Alliancebernstein L.P. | 0.00% | New | 13,190 | $211K |
| Transatlantique Private Wealth LLC | 0.08% | No change | 12,862 | $205K |
| State of Wyoming | 0.02% | Reduce -29.5% | 12,743 | $203K |
| Oppenheimer Asset Management Inc. | 0.00% | Reduce -1.9% | 11,132 | $178K |
| Public Employees Retirement System of Ohio | 0.00% | No change | 10,834 | $173K |
| Delta Capital Management LLC | 0.09% | No change | 10,380 | $166K |
| CHICAGO TRUST Co NA | 0.02% | New | 10,325 | $165K |
| Cantor Fitzgerald, L. P. | 0.00% | New | 10,000 | $160K |
| SG Americas Securities, LLC | 0.00% | New | 9,128 | $146K |
| MetLife Investment Management, LLC | 0.00% | Add +22.9% | 7,958 | $127K |
| JPMorgan Chase & Co. | 0.00% | Add +20.7% | 7,936 | $127K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +2.5% | 7,791 | $124K |
| Harbour Investments, Inc. | 0.00% | No change | 7,700 | $123K |
| Deutsche Bank AG | 0.00% | Reduce -29.3% | 7,213 | $115K |
| AlphaQuest LLC | 0.01% | Reduce -16.1% | 6,609 | $105K |
| Citigroup Inc. | 0.00% | Reduce -40.6% | 5,735 | $92K |
| New York State Common Retirement Fund | 0.00% | No change | 5,395 | $86K |
| FMR LLC | 0.00% | Add +1.4% | 3,145 | $50K |
| US Bancorp \de | 0.00% | Reduce -9.0% | 2,597 | $41K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 2,557 | $41K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +116.1% | 1,917 | $31K |
| Ameritas Investment Partners, Inc. | 0.00% | Add +59.4% | 1,454 | $23K |
| BNP Paribas Financial Markets | 0.00% | Reduce -73.5% | 1,316 | $21K |
| Legal & General Group Plc | 0.00% | No change | 1,260 | $20K |
| Cwm, LLC | 0.00% | Add +454.7% | 1,187 | $19K |
| New York State Teachers Retirement System | 0.00% | No change | 1,161 | $19K |
| Jones Financial Companies LLLP | 0.00% | New | 1,114 | $18K |
| Avion Wealth | 0.00% | No change | 1,000 | $15K |
| California State Teachers Retirement System | 0.00% | No change | 922 | $15K |
| Comerica Bank | 0.00% | Add +0.4% | 513 | $8K |
| Amalgamated Bank | 0.00% | No change | 372 | $6K |
| Nemes Rush Group LLC | 0.00% | No change | 200 | $3K |
| EverSource Wealth Advisors, LLC | 0.00% | New | 115 | $2K |
| GAMMA Investing LLC | 0.00% | Reduce -59.7% | 91 | $1K |
| Nisa Investment Advisors, LLC | 0.00% | Add +162.1% | 76 | $1K |
| Allworth Financial LP | 0.00% | New | 59 | $942 |
| Parkside Financial Bank & Trust | 0.00% | New | 35 | $559 |
| Vermillion Wealth Management, Inc. | 0.00% | No change | 30 | $479 |
| MAI Capital Management | 0.00% | No change | 25 | $399 |
| Essential Partners LLC | 0.00% | — | 18 | $287 |
| True Wealth Design, LLC | 0.00% | Reduce -15.4% | 11 | $176 |
| Covestor Ltd | 0.00% | Reduce -90.7% | 5 | $0 |
"% of holder's portfolio" is MEC's weight in each manager's 13F, not the share of Mayville Engineering Co. Inc. the manager owns.