Announcements & Upcoming Events

January 19, 2017
Advisory Committee Invitation For Nominees More.

January 17, 2017
SROs Select Thesys Technologies, LLC as Consolidated Audit Trail Plan Processor More.

Creation of NMS Plan

On July 11, 2012, the U.S. Securities and Exchange Commission (SEC) voted to adopt Rule 613 under Regulation NMS requiring the national securities exchanges and national securities associations listed below (collectively, the SROs) to submit an NMS plan (Plan) to the SEC to create, implement, and maintain a consolidated audit trail (CAT). 

The SROs have developed the Plan and submitted it to the SEC pursuant to Rule 613 and have created this web site as a resource for interested market participants and members of the public. This web site contains links to the homepages of each participant in the Plan as well as the SEC and information the SROs want to share with the public, including information on upcoming events. The SROs encourage market participants and others to share their thoughts regarding the CAT by submitting an email to

SEC Approved CAT NMS Plan Amended to Include MIAX Pearl – new as of 1/13/17

Approved CAT NMS Plan – new as of 11/29/16

CAT Funding Model 2014 Tier Data – new as of 7/14/16

Estimated Annual Plan Processor Fees – new as of 7/11/16

CAT NMS Plan Security Requirements – Architecture, Program and Data Usage Controls – new as of 3/24/16

Summary of the Consolidated Audit Trail Initiative - new as of 5/18/16