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A. General
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H. ATS
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L. Equity Floor Brokers
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05/08/2026
FAQ
M13.
Does a Firm Designated ID apply to a trading account or to a Customer? Certain provisions in the CAT NMS Plan refer to Firm Designated IDs for Customers.
Topics
M. Firm Designated ID
05/08/2026
FAQ
M12.
Where can I find additional information regarding the Firm Designated Identifier (FDID)?
Topics
M. Firm Designated ID
05/08/2026
Technical Specifications
Reference Database Industry Member Releases - Scope and Schedule
05/08/2026
Technical Specifications
Reference Database Technical Specifications v2.4.0 (Clean)
05/08/2026
FAQ
M11.
Is the use of a Relationship ID to populate the FDID if the account structure is not available at the time of order receipt limited to only institutions?
Topics
M. Firm Designated ID
05/08/2026
CAT Alert
CAT Alert 2026-01 - Reference Database Reporting: Transition to Schema Version 1.0.0
Topics
B. Reporting Requirements
05/08/2026
Reference Material
Reference Data File Schema
05/08/2026
Technical Specifications
Reference Database Technical Specifications v2.4.0 (Redlined)
05/08/2026
FAQ
U7.
Can a fully disclosed introducing broker-dealer and its clearing firm use the same firmDesignatedID (FDID) for New Order events (MENO)/New Option Order events (MONO)/ Multi-Leg New Order (MLNO) and Post-Trade Allocation event (MEPA)/Option Post-Trade Allocation event (MOPA)?
Topics
U. Allocations
05/08/2026
FAQ
B53.
Are account transfers between broker-dealers (e.g., ACATS transfers) required to be reported to CAT?
Topics
B. Reporting Requirements
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