FIX Protocol Extension Packs
The FIX Protocol is updated and extended constantly. Rather than releasing new FIX versions from time to time, the Protocol evolves through Extension Packs, each produced by the Global Technical Committee based on requirements from FIX’s working groups and members, and published immediately. The term “FIX Latest” stands for the most recent version of the Protocol up to and including the latest Extension Pack. You can also access the machine-readable specification of the latest EP in Orchestra, Unified Repository and FIXML Schema formats.
EP312 - FIX Latest Session Layer Corrections 470.64 KB 5 downloads
This extension aligns the session layer messages in the Orchestra representation...EP311 - FIX 4.4 Errors and Omissions August 2026 652.29 KB 1 downloads
This extension makes corrections and removes inconsistencies in the Orchestra XML...EP310 - FIX 4.2 Errors and Omissions August 2026 942.01 KB 2 downloads
This extension makes corrections and removes inconsistencies in the Orchestra XML...EP309 - Equity Issuance Phase 1A 479.19 KB 19 downloads
This extension adds the ability to distinguish regular orders from those related...EP308 - Event Type Enhancements 463.97 KB 9 downloads
This extension adds event types to support the concept of derivative instruments...EP307 - Securities Lending Trade Enhancements Phase 2 387.37 KB 39 downloads
This extension enhances the securities lending capabilities related to trade. ...EP306 - FIX Latest Errors and Omissions June 2026 2.34 MB 14 downloads
This extension of FIX Latest enhances the definitions of FIX trade messages and makes...EP305 - Outage Communication Extension 588.90 KB 22 downloads
This extension provides support for the communication of outage information related...EP304 - New Market Order Type 360.70 KB 19 downloads
This extension adds a new type of market order that is converted to a limit order...EP303 Algorithm Certification Enhancements Part 2 524.86 KB 28 downloads
The FIX Algorithmic Trading Working Group introduced a set of messages supporting...EP302 LegRateSource enhancement 534.36 KB 24 downloads
This extension pack supports FX Non-deliverable forwards to fully support NDF fixing...EP301 - Securities Lending Trade Enhancements 5.01 MB 129 downloads
This extension pack includes enhancements to address gaps in the needs of Securities...EP300 - EU Consolidated Tape for Bonds and Equities 5.01 MB 3931 downloads
This extension pack includes enhancements needed to support the EU’s consolidated...EP299 - MDEntryType(269) extension 4.25 MB 664 downloads
This extension pack supports the requirement to publish adjusted reference settlement...EP298 - Allocation Enhancements 4.45 MB 787 downloads
This extension pack enhances the capability to assign individual allocations of an...EP297 - Algo Trading Identifiers 4.43 MB 1401 downloads
This Extension Pack covers a request to provide data on ExecutionReport(35=8) messages...EP296 - Korea Short Selling Registration Number 4.33 MB 1952 downloads
This extension pack includes the ability for brokers operating in Korea and interfacing...EP295 - Algo Certification Enhancements 5.99 MB 2949 downloads
This extension pack addresses Algo Certification gaps found with the introduction...EP294 - Errors and Omissions 2023-2024 31.92 MB 2487 downloads
This extension pack corrects errors and omissions discovered in the FIX Latest Standard,...
