Mayville Engineering Co.MEC
13F holders, Q1 2026 (March 31)124holders +1
20new positions
19sold out
4famous investors
$17.95avg. 13F price*
At the end of Q1 2026, 124 institutions reported holding Mayville Engineering Co. Inc. (MEC) in their 13F filings, up 1 from Q4 2025. 20 opened new positions and 19 sold out. The largest holders were Allspring Global Investments Holdings, LLC ($35.8M), Dimensional Fund Advisors LP ($16.6M) and BlackRock, Inc. ($15.8M). 4 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies'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 Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 20 | $12.1M |
| Exits | 19 | $12.3M |
All 13F filers, Q4 2025 → Q1 2026: 1,992,725 shares bought and 1,574,007 shares sold, net +418,718 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 124 holders
| Allspring Global Investments Holdings, LLC | 0.06% | Reduce -2.5% | 2,000,350 | $35.8M |
| Dimensional Fund Advisors LP | 0.00% | Add +5.6% | 926,216 | $16.6M |
| BlackRock, Inc. | 0.00% | Add +1.9% | 881,854 | $15.8M |
| Portolan Capital Management, LLC | 0.78% | Add +60.1% | 821,136 | $14.7M |
| Royce & Associates LP | 0.13% | Add +20.3% | 751,001 | $13.5M |
| EVR Research LP | 6.34% | Add +2.5% | 620,000 | $11.1M |
| Vanguard Capital Management LLC | 0.00% | — | 594,938 | $10.7M |
| Blair William & Co. | 0.03% | Reduce -3.2% | 565,300 | $10.1M |
| First Eagle Investment Management, LLC | 0.01% | Add +12.8% | 404,075 | $7.3M |
| Granahan Investment Management, LLC | 0.34% | Add +44.7% | 387,470 | $7.0M |
| Millennium Management | 0.01% | Add +148.7% | 380,972 | $6.8M |
| Ameriprise Financial Inc. | 0.00% | Add +0.3% | 351,790 | $6.3M |
| Geode Capital Management, LLC | 0.00% | Add +2.1% | 335,835 | $6.0M |
| State Street Corp. | 0.00% | Add +0.3% | 285,850 | $5.1M |
| Silvercrest Asset Management Group LLC | 0.04% | Add +49.9% | 269,681 | $4.8M |
| JB Capital Partners LP | 0.77% | No change | 250,512 | $4.5M |
| Congruence Capital, LLC | 1.41% | Add +12.7% | 234,475 | $4.2M |
| Boston Partners | 0.00% | Add +4.5% | 232,637 | $4.2M |
| Bridgeway Capital Management, LLC | 0.08% | Reduce -1.9% | 222,703 | $4.0M |
| American Century Companies Inc. | 0.00% | Reduce -21.1% | 221,673 | $4.0M |
| Roubaix Capital, LLC | 1.76% | Add +44.0% | 210,657 | $3.8M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -35.8% | 185,261 | $3.3M |
| Bank of America Corp. | 0.00% | Reduce -16.1% | 183,599 | $3.3M |
| Wealthspire Advisors, LLC | 0.02% | Add +48.4% | 141,607 | $2.5M |
| Panoramic Capital, LLC | 1.76% | New | 140,000 | $2.5M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -27.3% | 138,215 | $2.5M |
| Empowered Funds, LLC | 0.01% | New | 123,293 | $2.2M |
| Sei Investments Co. | 0.00% | Add +47.0% | 122,878 | $2.2M |
| CenterBook Partners LP | 0.12% | Reduce -53.0% | 120,303 | $2.2M |
| UBS Group AG | 0.00% | Reduce -20.5% | 116,571 | $2.1M |
| Squarepoint Ops LLC | 0.00% | New | 110,569 | $2.0M |
| Kennedy Capital Management LLC | 0.04% | Add +2.3% | 106,791 | $1.9M |
| Northern Trust Corp. | 0.00% | Add +6.4% | 100,384 | $1.8M |
| Formula Growth Ltd. | 0.81% | Add +150.0% | 100,000 | $1.8M |
| Osaic Holdings, Inc. | 0.00% | Reduce -17.5% | 99,104 | $1.8M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 91,044 | $1.6M |
| Anchor Capital Advisors LLC | 0.04% | Reduce -24.8% | 81,442 | $1.5M |
| Vanguard Portfolio Management LLC | 0.00% | — | 75,903 | $1.4M |
| Tocqueville Asset Management L.P. | 0.02% | No change | 71,100 | $1.3M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -27.7% | 64,908 | $1.2M |
| Renaissance Technologies | 0.00% | Reduce -11.7% | 62,900 | $1.1M |
| Citadel Advisors | 0.00% | Reduce -45.1% | 56,786 | $1.0M |
| Integrated Quantitative Investments LLC | 0.16% | New | 50,659 | $909K |
| Nuveen, LLC | 0.00% | Reduce -45.9% | 47,418 | $851K |
| SummerHaven Investment Management, LLC | 0.50% | Reduce -12.4% | 45,325 | $814K |
| HighTower Advisors, LLC | 0.00% | New | 44,587 | $800K |
| Journey Strategic Wealth LLC | 0.02% | Add +51.5% | 44,206 | $793K |
| XTX Topco Ltd | 0.01% | Add +94.4% | 41,478 | $745K |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -7.7% | 40,098 | $720K |
| Numerai GP LLC | 0.07% | New | 39,755 | $714K |
| Essential Investment Partners LLC | 0.66% | Add +15.7% | 39,639 | $712K |
| Sheets Smith Wealth Management | 0.08% | No change | 38,975 | $700K |
| Bank of New York Mellon Corp | 0.00% | Reduce -8.1% | 38,851 | $697K |
| Panagora Asset Management Inc. | 0.00% | Reduce -32.7% | 36,765 | $660K |
| Legato Capital Management LLC | 0.06% | New | 35,698 | $641K |
| Two Sigma Investments, LP | 0.00% | New | 34,708 | $623K |
| State of Wisconsin Investment Board | 0.00% | Reduce -20.7% | 32,262 | $579K |
| Ancora Advisors LLC | 0.01% | Reduce -74.5% | 32,133 | $577K |
| Janney Montgomery Scott LLC | 0.00% | Reduce -8.3% | 31,305 | $562K |
| North Star Investment Management Corp. | 0.03% | New | 30,000 | $539K |
| Invesco Ltd. | 0.00% | Reduce -3.0% | 27,028 | $485K |
| O'shaughnessy Asset Management, LLC | 0.00% | Reduce -2.9% | 26,370 | $473K |
| Morgan Stanley | 0.00% | Reduce -71.1% | 23,834 | $428K |
| LPL Financial LLC | 0.00% | Reduce -0.1% | 21,771 | $391K |
| AQR Capital Management | 0.00% | Reduce -36.1% | 20,383 | $366K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -13.1% | 20,301 | $364K |
| Needham Investment Management LLC | 0.02% | New | 20,000 | $359K |
| Barclays PLC | 0.00% | Reduce -48.6% | 19,028 | $342K |
| SummitTX Capital, L.P. | 0.01% | Add +23.7% | 18,696 | $336K |
| Rhumbline Advisers | 0.00% | Add +0.9% | 18,200 | $327K |
| Gradient Investments LLC | 0.00% | Reduce -18.2% | 17,104 | $307K |
| Johnson Financial Group, Inc. | 0.01% | No change | 16,475 | $296K |
| Worth Venture Partners, LLC | 1.93% | Add +10.0% | 15,110 | $271K |
| Avior Wealth Management, LLC | 0.01% | No change | 14,919 | $268K |
| Franklin Resources Inc. | 0.00% | Add +0.5% | 13,528 | $243K |
| Alliancebernstein L.P. | 0.00% | No change | 12,810 | $240K |
| Wells Fargo & Company | 0.00% | Reduce -44.1% | 12,569 | $226K |
| Mirabella Financial Services LLP | 0.02% | New | 12,430 | $223K |
| Brevan Howard Capital Management LP | 0.00% | New | 12,023 | $216K |
| Heck Capital Advisors, LLC | 0.02% | New | 11,494 | $206K |
| Deutsche Bank AG | 0.00% | Add +24.1% | 10,237 | $184K |
| Aquatic Capital Management LLC | 0.00% | Add +103.1% | 8,901 | $160K |
| MetLife Investment Management, LLC | 0.00% | No change | 7,958 | $143K |
| Harbor Capital Advisors, Inc. | 0.01% | New | 7,785 | $140K |
| Harbour Investments, Inc. | 0.00% | No change | 7,700 | $138K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +2.2% | 6,241 | $112K |
| Jones Financial Companies LLLP | 0.00% | Add +111.0% | 6,181 | $109K |
| Vanguard Global Advisers, LLC | 0.00% | — | 5,936 | $107K |
| New York State Common Retirement Fund | 0.00% | No change | 5,395 | $97K |
| JPMorgan Chase & Co. | 0.00% | Reduce -1.3% | 5,481 | $96K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 4,651 | $83K |
| FMR LLC | 0.00% | Add +28.0% | 4,261 | $76K |
| State of Alaska, Department of Revenue | 0.00% | No change | 3,903 | $70K |
| Royal Bank of Canada | 0.00% | Reduce -8.9% | 3,447 | $62K |
| BNP Paribas Financial Markets | 0.00% | Reduce -5.3% | 2,798 | $50K |
| Citigroup Inc. | 0.00% | Add +17.7% | 1,637 | $29K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 1,454 | $26K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +17.5% | 1,281 | $23K |
| Legal & General Group Plc | 0.00% | No change | 1,260 | $23K |
| Avion Wealth | 0.00% | No change | 1,000 | $17K |
| Cwm, LLC | 0.00% | Add +2.3% | 922 | $17K |
| California State Teachers Retirement System | 0.00% | Reduce -12.1% | 708 | $13K |
| MAI Capital Management | 0.00% | Add +193.6% | 414 | $7K |
| Sterling Capital Management LLC | 0.00% | Reduce -97.5% | 401 | $7K |
| Rockefeller Capital Management L.P. | 0.00% | Reduce -52.7% | 276 | $5K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +387.2% | 229 | $4K |
| GAMMA Investing LLC | 0.00% | No change | 174 | $3K |
| Optiver Holding B.V. | 0.00% | Reduce -47.5% | 124 | $2K |
| Fifth Third Bancorp | 0.00% | New | 118 | $2K |
| Advisory Services Network, LLC | 0.00% | New | 115 | $2K |
| Annis Gardner Whiting Capital Advisors, LLC | 0.00% | New | 80 | $1K |
| Allworth Financial LP | 0.00% | No change | 58 | $1K |
| Bayban | 0.00% | New | 43 | $772 |
| Bare Financial Services, Inc | 0.00% | No change | 37 | $664 |
| Parkside Financial Bank & Trust | 0.00% | No change | 35 | $629 |
| Vermillion Wealth Management, Inc. | 0.00% | No change | 30 | $539 |
| Nisa Investment Advisors, LLC | 0.00% | No change | 26 | $467 |
| EverSource Wealth Advisors, LLC | 0.00% | No change | 25 | $449 |
| PNC Financial Services Group, Inc. | 0.00% | Add +53.9% | 20 | $359 |
| Essential Partners LLC | 0.00% | No change | 14 | $251 |
| Farther Finance Advisors, LLC | 0.00% | New | 14 | $251 |
| US Bancorp \de | 0.00% | Reduce -96.1% | 11 | $197 |
| True Wealth Design, LLC | 0.00% | No change | 9 | $162 |
| Root Financial Partners, LLC | 0.00% | New | 5 | $90 |
"% of holder's portfolio" is MEC's weight in each manager's 13F, not the share of Mayville Engineering Co. Inc. the manager owns.