NOTICE DATE: August 20, 2026

NOTICE TYPE: M-B082026-01 Extracts/Reports

SHORT DESCRIPTION: Supplemental IDR Required Interval Data Extract - Incomplete Datasets

INTENDED AUDIENCE: LSEs and TDSPs

DAYS AFFECTED: Jan 1, 2026 through Aug 21, 2026

LONG DESCRIPTION: Based on feedback from Market Participants, ERCOT has confirmed an issue in the timing logic with Supplemental IDR Required Interval Data Extract | COMS-457 | Rpt ID 1041. This issue impacted the Point in Time snapshot logic used to determine the operational timestamp of data records, which was causing this extract to pull incomplete data sets. ERCOT is implementing a fix for this issue off-cycle on 8/20/2026. Starting with extract postings on 8/21/2026, Market Participants may see additional rows of data within the extract for a complete data set of all records associated with the timestamp for the Operating Date.

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.

If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

dg