Last updated Aug 4, 2026
MKTX (MKTX) is a publicly traded company. This page tracks every superinvestor 13F holding, congressional stock trade, and Form 4 insider transaction in MKTX. Across our datasets, 1 superinvestors hold MKTX and 3 members of Congress have traded it.
Notable holders include Ray Dalio. Active congressional traders include Julie Johnson, Ro Khanna, and Daniel S. Goldman.
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