Dear TXSE Member,
Texas Stock Exchange LLC ("TXSE") operates as a national securities exchange and is launching its primary listing market. TXSE-listed securities will be identified by Securities Information Processor (SIP) listing market code "F"
1. IMPLEMENTATION TIMELINE
TXSE is targeting supporting primary listing functionality in the industry Saturday test on July 25, 2026. Subject to successful testing and applicable approvals, TXSE intends to begin supporting primary listing and auction functionality in production on Monday, July 27, 2026 with our test symbols only.
The following TXSE-listed test securities will be available for validation and certification activities:
ZZZTT
ZZZTE
ZZZTX
ZZZTA
ZZZTS
2. TECHNICAL SPECIFICATIONS
Technical specifications supporting TXSE primary listing and auction functionality are currently available for review on the TXSE website. Market participants should note that while the specifications include auction-related functionality, such functionality will not be available in the production environment until the July 25, 2026 industry test and subsequent production rollout scheduled for July 27, 2026, unless otherwise announced by TXSE.
If you have questions or require assistance, please contact marketops@txse.com.
We look forward to working with you.
Sincerely, TXSE Market Operations