Increase to Maximum Configurable Per-Order Risk Control Values

Dear Member,

Effective today, September 18, 2026, TXSE has increased the maximum configurable values for the following risk controls under Rule 11.007:

Per-order notional value: Increased from $250,000,000 to $999,999,999. The default remains $30,000,000.

Per-order share quantity: Increased from 1,000,000 shares to 10,000,000 shares. The default remains 1,000,000 shares.

Firms may log into Stockyard and update these values in their applicable port settings. All changes submitted via Stockyard will take effect beginning the next trading day.

These updates supersede the maximum values previously communicated in the TXSE Primary Listings Readiness Reminder.

For questions or assistance, please contact TXSE Market Operations at marketops@txse.com or 214-612-0388.

Sincerely,

TXSE Market Operations