MARTEN TRANS LTD CALL is a security (CUSIP 573075908) tracked across SEC portfolio filings. 3 institutional managers reported $807K on Form 13F as of 2026-03-31.
| Manager | Location | Value | Shares |
|---|---|---|---|
| SIMPLEX TRADING, LLC | CHICAGO, IL | $528K | — |
| IMC-Chicago, LLC | CHICAGO, IL | $280K | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |