MARKETAXESS HLDGS INC COM is a security (CUSIP 57060D958) tracked across SEC portfolio filings. 5 institutional managers reported $1.0M on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| IMC-Chicago, LLC | CHICAGO, IL | $919K | — |
| GUARDIAN CAPITAL LP | TORONTO, A6 | $65K | — |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $16K | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $16K | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |