Latest Updates | CATNMSPLAN

06/12/2026
Reference Material
FINRA CAT Connectivity Supplement for Industry Members v1.18
06/10/2026
Technical Specifications
2026 Industry Member Releases (Transaction) - Scope and Schedule
06/09/2026
Technical Specifications
CAT Reporting Technical Specifications for Plan Participants v4.3.0
06/09/2026
FAQ| C. Definitions
C1. How has the Operating Committee defined “Trading Day”?
06/02/2026
Event
Reference Database Industry Webinar (June 2, 2026)
06/01/2026
FAQ| D. Order Receipt
D10. How should orders received with instructions from the customer to buy as much stock as possible for a specific dollar amount (e.g., $1,000), commonly referred to as "cash" orders, be reported to CAT?
05/28/2026
Reference Material
Self-Reporting Deviations Of Clock Synchronization Standards Form
05/28/2026
Reference Material
Annual Clock Synchronization Certification Form
05/13/2026
Reference Material
Industry Member Schema v4.2.0
05/11/2026
Technical Specifications
Order Routing Field Mapping between CAT and Exchanges v2.18
05/11/2026
Technical Specifications
CAT Technical Specifications for Billing Trade Details v1.3 (Redlined)
05/11/2026
Reference Material
May 11, 2026 – SEC Approved CAT NMS Plan as of 5/11/2026
05/08/2026
Technical Specifications
Reference Database Technical Specifications v2.4.0 (Redlined)
05/08/2026
FAQ| V. CAT Billing
V4. How is a CAT Executing Broker’s CAT fee calculated?
05/08/2026
Reference Material
CAT Billing Scenarios v1.1.4 (Clean)

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