SEC Plans Broad Overhaul of CAT, With Transition Potentially Running Through End-2027
U.S. Securities and Exchange Commission Chair Paul S. Atkins said the agency is preparing a broad overhaul of the Consolidated Audit Trail, or CAT, targeting its governance structure, funding model, and operating framework. In a letter to CAT Operating Committee Chair Robert Walley, Atkins said the SEC has already reduced CAT’s annual operating costs during his tenure through exemptive relief and approval of amendments to the CAT NMS Plan, while also eliminating the requirement to report personally identifiable information to the system. Even so, the SEC said CAT still faces what it described as fundamental problems tied to cost, governance, and funding. The agency launched a concept release on April 16, 2026, to review CAT as well as other audit trail systems and data sources used in U.S. securities market oversight. According to the SEC, it has received hundreds of comment letters, with one central point of agreement: investors and market participants want the SEC to take on a larger role in CAT management and funding. Atkins said staff have been directed to develop deeper reform proposals, including alternative funding sources, a possible repeal of Rule 613, and internal preparation for the SEC to assume CAT governance responsibilities.








