Nasdaq PHLX Announces Re-Platform Symbol Migration Schedule

As previously announced, Nasdaq will migrate Nasdaq PHLX to a new platform with an enhanced suite of functionality in November 2025. PHLX will begin migrating symbols to the new platform per a detailed symbol migration schedule. Participants will continue to utilize Specialized Quote Feed (SQF) v9.0, and CTI v3.0 on their new PHLX platform connections for symbols as they migrate to the new platform, while continuing to leverage existing connectivity for symbols that have not yet migrated. Additionally, participants may continue to utilize their current PHLX FIX connections for all symbols throughout the symbol migration, but new tags/features will not be available to participants until they migrate to their new FIX v13.4 ports. Participants may also leverage new FIX v13.4 ports to interact with symbols that have migrated to the new platform, while continuing to leverage existing FIX connectivity for symbols that have not yet migrated. 

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