Methods, systems, and computer-readable media for deploying and implementing centralized trading and tracking computing platforms to support tri-party trading are presented. In some embodiments, a central trading computing platform may receive, from a discretionary and managed accounts administration computer system associated with a financial institution, trade information defining one or more trades in one or more exchange traded funds or equity securities for one or more accounts administrated by the financial institution. Subsequently, the computing platform may validate the trade information and create order information. Then, the computing platform may send, the order information to a clearing entity computer system. The order information may be configured to cause the clearing entity computer system to settle the one or more trades in the one or more exchange traded funds or equity securities for the one or more accounts administrated by the financial institution with a custodian different from the financial institution.