OATS Technical Specifications

The OATS Reporting Technical Specifications document covers the requirements and procedures for clock synchronization; system access requirements for supplying OATS files to FINRA; order reporting scenarios that describe, from a business perspective, responsibilities for reporting to OATS; details regarding the required layout of OATS files; procedures for providing corrections to OATS data and for receiving feedback from FINRA; and the procedures for registration, self-administration, and testing and certification. It also contains a data dictionary that describes all of the data elements in OATS files; a list of report formats, including field names, data types, and lists of permissible values; examples of order reports; and a glossary. The OATS Reporting Technical Specifications is not intended to provide information about how to develop an electronic system that reports order information; it is only intended to describe what such a system must deliver to FINRA.

FINRA released a new edition of the OATS Reporting Technical Specifications dated June 27, 2018. The changes described in this edition include:

  • Addition of the “DIV” Dividend Reinvestment Order Special Handling Code. This change will be available in both the OATS Certificate Test and OATS Production Environments on July 2, 2018.
  • Additional Market Center ID of “DC” for FINRA/Nasdaq Chicago Trade Reporting Facility1. In support of the planned Industry testing during 3Q2018, this change will be available in the OATS Certificate Test Environment on July 2, 2018. It will be available in OATS Production once the TRF becomes operational. For more information, please refer to Equity Trader Alert #2018 - 41.
  • Error Code 2163 has been updated to allow the Account Type of ‘C’ (Updated as of 7/13/2018)

View OATS Reporting Technical Specifications (6/27/2018 edition) (PDF 1.41 MB)

View our archive of past specifications.

If you are having problems accessing these files, please contact FINRA Business and Technology Support Services at 1-800-321-6273.


1. Pending SEC approval, the FINRA/Nasdaq Chicago Trade Reporting Facility will operate as an alternative trade reporting facility operated by FINRA and Nasdaq.