MAYVILLE ENGR CO INC COM is a security (CUSIP 578605907) tracked across SEC portfolio filings. 3 institutional managers reported $799K on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| IMC-Chicago, LLC | CHICAGO, IL | $775K | — |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $23K | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |