About a-team Marketing Services
The knowledge platform for the financial technology industry

A-Team Insight Blogs

US Consolidated Audit Trail Swings into Action

Subscribe to our newsletter

The US Consolidated Audit Trail (CAT) swung into action last week after long delays and in a limited way, with members of self-regulatory organisations (SROs) within the CAT NMS (National Market System) Plan, except small SRO members, starting to report to the central repository.

Early reporting follows the end of October publication by Thesys CAT, operator of the CAT, of long-awaited reporting technical specifications. SROs are initially reporting quote, order, trade and other information required under the CAT NMS Plan, although Thesys CAT has yet to complete all the capabilities of first phase reporting. It has advised the SROs that it is continuing to work on outstanding elements, such as the regulators’ query functionality and links between reported events, and plans to complete the full functionality required by the CAT NMS Plan for the first reporting phase on or before March 31, 2019.

While SRO members started to submit data to the CAT on November 15, 2018, small SRO members must follow suit on November 15, 2019.

The CAT is intended to allow regulators to improve securities’ market surveillance by creating an extensive audit trail of customer and order event information for all orders in US exchange-listed and over-the-counter (OTC) equity securities across all markets and trading venues. It is also meant to collect data for exchange-listed options contracts. If implementation of the CAT is completed fully and successfully, which is a mighty challenge for all concerned, it is expected to be the largest data repository of information on securities transactions in the world.

Subscribe to our newsletter

Related content

WEBINAR

Upcoming Webinar: Post-Trade Transformation: Automating Clearing & Settlement

Date: 1 December 2026 Time: 10:00am ET / 3:00pm London / 4:00pm CET Duration: 50 minutes The UK, EU and Swiss markets move to T+1 settlement on 11 October 2027, but the first binding compression arrives almost a year earlier. ESMA’s amended settlement discipline RTS expects allocation and confirmation completed by 23:00 CET on trade...

BLOG

Report Once – ESMA’s Simplification Plan for Regulatory Reporting

ESMA has turned the long-running industry case for “report once” transaction reporting into a staged policy programme for rebuilding EU reporting around reusable, controlled transaction data. Its Final Report On the Call for Evidence recommends a single integrated framework across the Markets in Financial Instruments Regulation (MiFIR), European Market Infrastructure Regulation (EMIR) and Securities Financing...

EVENT

RegTech Summit New York

Now in its 10th year, the RegTech Summit in New York will bring together the RegTech ecosystem to explore how the North American capital markets financial industry can leverage technology to drive innovation, cut costs and support regulatory change.

GUIDE

Regulatory Data Handbook 2026 – Fourteenth Edition

Welcome to the fourteenth edition of A-Team Group’s Regulatory Data Handbook. Supervisors increasingly expect firms to demonstrate which rules apply, which data supports each obligation, who owns the control and how exceptions are identified and resolved. Policies and implementation programmes must now be supported by records that can withstand regulatory scrutiny. This edition examines material...