Trader | TXSE-2026-050 | Sep 28, 2026, 5:08 PM CT
REMINDER: TXSE Corporate Listings Readiness
Dear Member,
The following companies are scheduled to transfer their primary listings and related securities to TXSE beginning October 5th, 2026.
| Ticker | Issuer | Security |
|---|---|---|
| ET | Energy Transfer | Common Units |
| ET-PRI | Energy Transfer | 9.250% Series I Fixed Rate Perpetual Preferred Units |
| SUN | Sunoco | Common Units |
| SUNC | SunocoCorp | Common Units |
| USAC | USA Compression | Common Units |
| DDS | Dillard’s, Inc. | Class A Common Stock |
| DDT | Dillard’s, Inc. | 7.5% Capital Securities of Dillard’s Capital Trust I |
Members should review the resources and operational-readiness items below in advance of the transfers. A complete list of upcoming TXSE listings is available on the TXSE Listings Calendar.
Market Maker Registration
Members intending to act as Market Makers in these securities may submit their registrations through Stockyard. Members should confirm that the appropriate users have access and permissions to complete the registration process.
Corporate Actions Listing Feed (CALF)
TXSE disseminates corporate action information for TXSE-listed securities through the Corporate Actions Listing Feed (CALF). Firms should confirm that they are configured to receive CALF notifications or contact TXSE Market Operations to establish delivery by email or SFTP.
Additional information on CALF can be found in Trader Alert TXSE-2026-34.
TXSE Auctions
Members are encouraged to confirm their readiness to participate in TXSE Opening, Closing and Halt Auctions, including the ability to:
Enter, modify and cancel eligible auction orders;
Receive and process auction-related market data;
Process auction executions and official opening and closing prices.
Auction System Settings
Firms should review their Auction system settings to ensure they align with their intended auction behavior. Specifically, for the Cancel-on-Disconnect setting, the ENABLED_KEEP_AUCTIONS setting allows eligible auction orders to remain active if the firm’s order-entry session disconnects.
Risk Controls
TXSE recently increased the maximum configurable values for the following risk controls:
Firms may update these values in their applicable port settings through Stockyard. Changes submitted through Stockyard take effect on the next trading day.
Additional information is available in Trader Alert TXSE-2026-049.
| Risk Control | Maximum Configurable Value | Default Value |
|---|---|---|
| Per-order notional value | $999,999,999 | $30,000,000 |
| Per-order share quantity | 10,000,000 shares | 1,000,000 shares |
Firms may update these values in their applicable port settings through Stockyard. Changes submitted through Stockyard take effect on the next trading day.
For questions or assistance, please contact:
TXSE Market Operations
MarketOps@TXSE.com
214-612-0388
Sincerely,
TXSE Market Operations