Member Readiness and Launch Guide

The Texas Stock Exchange (TXSE) is building a modern, transparent and resilient U.S. equities market.

Our mission is to deliver innovation, competition and efficiency for listed companies, investors, asset managers and trading firms through world-class market infrastructure and a premier listing venue.

TXSE is preparing for its launch as a fully registered national securities exchange. The below schedule outlines the operational and technology roadmap which targets trading to commence between July 3, 2026 - July 17, 2026*.

This guide provides members, market participants and technology partners with key information on:

• Connectivity and access options
• Testing and certification timelines
• Member readiness steps leading up to go-live

*Note: All target dates are subject to change and will be communicated via email to members/market participants via email and TXSE.com

The Texas Stock Exchange (TXSE) operates from Equinix NY6 in Secaucus, NJ as its primary data center. TXSE’s Disaster Recovery (DR) facility is located in Equinix DA11 in Dallas, TX. Backhaul to the DR facility is available from 350 E. Cermak in Chicago, IL (CH1). No backhaul to the primary data center is provided. Connectivity to both production and DR environments is available through cross-connects, circuits or approved extranet providers. Cross-connects are limited to customers within the respective Equinix campuses, must terminate in a customer cage and cannot connect directly to rooftop infrastructure.

• Local Cross-Connects: 10Gb Ethernet connections (SMF LR/ER optics supported) within Equinix NY6, Equinix DA11, and 350 E. Cermak (CH1).
• Telco Circuit: Leased-line access through carrier partners present at Equinix.
• Extranet Providers: TXSE-approved extranet vendors offering managed connectivity solutions.
• VPNAccess: Available exclusively for sandbox testing, not for UAT or production environments.

TXSE has implemented latency equalization via equal-length fiber optic cables between TXSE’s matching engine and members in NY4, NY5 and NY6. Latency equalization is not used in the DR data center.

For details or to request connection approval: noc@txse.com

• TXSE Sandbox environment; and
• Member User Acceptance Testing (UAT) environment.

Member Certification Requirements: All members must complete certification prior to production go-live.

Technical specifications and certification guides will be made available at: txse.com/trading-membership

TXSE will employ a staged rollout allowing members to continue validating connectivity, risk controls and routing logic beginning with a limited set of NMS securities to ensure system stability, orderly trading and participant readiness. Subsequent expansions will include all eligible securities following initial market validation. This controlled launch model reflects input from our current and prospective members, industry best practices and mitigates early-stage operational risk.

TXSE maintains dedicated teams to support members through every stage of onboarding, certification and production readiness.

• TXSE Technical Specifications (FIX, SEED, FEED, RAKE)
• TXSE Connectivity Guide
• TXSE Membership Application Package

For updated information and technical documentation, please visit: txse.com/trading-membership

• All information contained in this document is provided for planning purposes only.
• TXSE may adjust dates, requirements or procedures as necessary to ensure market stability and regulatory compliance.