CENTERPOINT ENERGY HOUSTON ELECTRIC LLC

Large-Load Customers. The PUCT has begun the process of implementing Texas Senate Bill 6 through various rulemaking processes, focused on establishing financial, operational, and interconnection requirements for large-load customers to ensure grid reliability and prevent stranded infrastructure costs. On June 18, 2026, the PUCT approved ERCOT’s Batch Zero process for large-user connection requests with the stated goal of ensuring large electricity users like data centers only connect in quantities and locations the Texas grid can reliably support. Houston Electric estimates that approximately 14 gigawatts of its potential large-load customers are eligible to be considered part of ERCOT’s Batch Zero process, including the execution of Facilities Extension Agreements with Houston Electric and posting of financial security. The amount of gigawatts ultimately connected to the Houston Electric system, the actual amount of electricity ultimately used by these customers, and the ultimate timing of these additional load connections and energization, if at all, remain uncertain due to a variety of factors, including, but not limited to ERCOT approval into Batch Zero, including into base load or studied load, timing of construction, potential legislative, regulatory, and other government actions, and availability of materials. In the third quarter of 2026, customers provided or committed approximately $900 million in either contributions in aid of construction or financial security to Houston Electric, a portion of which may be returned to large-load customers depending on project outcomes and contractual requirements. These amounts will continue to change as projects move through ERCOT reviews, load allocations are refined, and customers either advance toward construction and energization or exit the process.

Updated 10-Year Capital Plan. In July 2026, CenterPoint Energy announced an increase in its 10-year capital plan of $1.2 billion to reflect total planned capital expenditures of approximately $66.7 billion through 2035. The plan is expected to advance economic growth, enhance the experience of the Registrants’ customers and deliver consistent value for stakeholders across the Registrants’ jurisdictions.

Equity Distribution Agreement. On May 15, 2026, CenterPoint Energy entered into the 2026 Equity Distribution Agreement with respect to the offering and sale from time to time of shares of Common Stock, having an aggregate gross sales price of up to $1 billion. Sales of Common Stock under the 2026 Equity Distribution Agreement may be made by any method permitted by applicable law and deemed to be an “at the market offering” as defined in Rule 415 of the Securities Act. CenterPoint Energy may also enter into one or more forward sale agreements pursuant to master forward confirmations and related supplemental confirmations. Upon entry into the Equity Distribution Agreement, CenterPoint Energy terminated the previous at-the-market program pursuant to the 2024 Equity Distribution Agreement. For further information, see Note 15 to the Interim Condensed Financial Statements.

CenterPoint Energy Appointment of Chief Accounting Officer. On February 23, 2026, CenterPoint Energy announced the appointment of Russell K. Wright to the position of Vice President and Chief Accounting Officer of CenterPoint Energy, effective March 2, 2026.

Treasury Notice 2026-7. On February 18, 2026, Treasury Notice 2026-7 was issued. This notice allows an election to modify the computation of AFSI by including an adjustment to deduct certain repair and maintenance costs that are capitalized in the applicable financial statement.

TEEEF. In June 2025, Houston Electric entered into the ERCOT Transaction, subject to PUCT approval, to release its 15 large (27 MW to 32 MW) TEEEF units to ERCOT at CPS Energy facilities to serve the greater San Antonio region until March 2027 unless terminated earlier pursuant to the provisions of the ERCOT Transaction, reduce its TEEEF fleet capacity and reduce its rates to reflect removal of the large TEEEF units from its fleet. Following the completion of service in the San Antonio area, Houston Electric anticipates that it would complete one or more future transactions involving its large TEEEF units. As the large TEEEF units would not be available to serve Houston Electric customers during such time, Houston Electric plans to continue to not charge customers for these units for any future periods. In November 2025, Houston Electric proposed to remove its five medium (5.7 MW) TEEEF units and to remove the associated lease costs from its rates effective January 1,

2026. On June 26, 2026, Houston Electric filed a stipulation and agreement supporting removal of the 15 large units and 5 medium units effective May 1, 2025 and January 1, 2026, respectively, an agreed motion for interim rates effective August 15, 2026, settlement testimony, and agreed motion to admit evidence and remand proceeding back to the PUCT. On June 29, 2026, SOAH granted the requested motions and remanded the proceeding to the PUCT. For additional information, see Note 6 to the Interim Condensed Financial Statements.

Regulatory Proceedings. For further information, see Note 6 to the Interim Condensed Financial Statements. For information related to our pending and completed regulatory proceedings to date in 2026, see “Liquidity and Capital Resources —Regulatory Matters” below.

Debt Transactions. For information about debt transactions to date in 2026, see Note 9 to the Interim Condensed Financial Statements.