Filing Flows › Mayville Engineering Company (MEC) › Who owns the stock
Who owns Mayville Engineering Company (MEC) stock
143 funds reported Mayville Engineering Company (MEC) shares in their latest 13F filings, worth $774M in all. The largest holder is Portolan Capital Management, LLC ($48.7M). Last quarter 90 funds added to their stakes and 52 cut them.
Largest holders (13F)
| Fund | Shares | Value | Change | Quarter |
|---|---|---|---|---|
| Portolan Capital Management, LLC | 1,299,256 | $48.7M | increase | 2026-06-30 |
| FMR LLC | 1,280,170 | $48.0M | increase | 2026-06-30 |
| BlackRock | 1,183,443 | $44.3M | increase | 2026-06-30 |
| Allspring Global Investments Holdings, LLC | 1,072,916 | $37.8M | decrease | 2026-06-30 |
| Driehaus Capital Management LLC | 846,354 | $31.7M | new | 2026-06-30 |
| Summit Partners Public Asset Management, LLC | 800,000 | $30.0M | new | 2026-06-30 |
| Dimensional Fund Advisors LP | 782,276 | $29.3M | decrease | 2026-06-30 |
| Royce & Associates LP | 752,083 | $28.2M | increase | 2026-06-30 |
| Vanguard Capital Management LLC | 743,621 | $27.9M | increase | 2026-06-30 |
| First Eagle Investment Management, LLC | 739,150 | $27.7M | increase | 2026-06-30 |
| Boston Partners | 696,429 | $25.8M | increase | 2026-06-30 |
| Jupiter Topco LLC | 575,278 | $21.5M | base | 2026-06-30 |
| Blair William | 546,714 | $20.5M | decrease | 2026-06-30 |
| Wellington Management Group LLP | 477,583 | $17.9M | new | 2026-06-30 |
| EVR Research LP | 441,908 | $16.6M | decrease | 2026-06-30 |
Mayville Engineering Company's latest quarter
Mayville Engineering Company, Q3 2026: revenue $170M (+18% year over year), operating margin 2.5%, net earnings $424K, operating cash flow $4.3M. The chart follows the revenue to costs, profit and cash.
Questions
Who owns the most MEC stock?
By the latest 13F filings: Portolan Capital Management, LLC ($48.7M); FMR LLC ($48.0M); BlackRock ($44.3M); Allspring Global Investments Holdings, LLC ($37.8M); Driehaus Capital Management LLC ($31.7M).
What is the short interest in MEC?
2,738,339 shares were sold short at the 2026-10-15 settlement, 12.06% of the float.
Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.