NOTICE DATE: November 12, 2025

NOTICE TYPE: R-111225-01 Outage Retail/Wholesale

SHORT DESCRIPTION: Planned Maintenance Outage - Retail

INTENDED AUDIENCE: TDSPs and LSEs

DAYS AFFECTED: Thursday, November 13, 2025 from 19:00 to 20:00

LONG DESCRIPTION: ERCOT will be performing planned maintenance on Thursday, November 13, 2025, from 19:00 to 20:00. During the outage, the following functions may be affected:

• MarkeTrak will be the only Retail system experiencing a potential outage during this time. In addition to maintenance activities, an enhancement to automated escalation emails will be implemented.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.

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dg