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

Recorded Webinar: Generative and Agentic AI in Financial Markets: What the Data Really Shows

Artificial intelligence is reshaping financial markets – but the reality on the ground is more nuanced, more uneven, and more instructive than the headlines suggest. A new A-Team Insight research programme, drawing on responses from senior AI decision-makers at buy-side and sell-side institutions across the USA, UK and Canada, reveals a market in transition: from...

BLOG

A-Team Group Announces AI in Capital Markets Awards 2026 Winners

As artificial intelligence dominates conversations among the decisions makers of the world’s financial institutions, A-Team Group has recognised the vendors that are enabling those firms to transform their operations with the most cutting edge of technologies. In its second annual AI in Capital Markets Awards, the group celebrates the technology suppliers in this fast-growing sector...

EVENT

TEST Event page 1

Now in its 15th year the TradingTech Summit London brings together the European trading technology capital markets industry and examines the latest changes and innovations in trading technology and explores how technology is being deployed to create an edge in sell side and buy side capital markets financial institutions.

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...