In July 2025, CenterPoint Energy, through its wholly-owned subsidiary SIGECO, repaid at maturity $41 million aggregate principal amount of SIGECO’s outstanding 3.45% first mortgage bonds due 2025 at a redemption price equal to 100% of the principal amount of the first mortgage bonds to be redeemed plus accrued and unpaid interest thereon.

On July 1, 2025, CenterPoint Energy, through its wholly-owned subsidiary SIGECO, entered into a Bond Purchase Agreement with certain institutional investors, under which SIGECO agreed to sell, and each investor agreed to severally purchase (i) on July 1, 2025, $100 million aggregate principal amount of SIGECO’s 5.09% First Mortgage Bonds, Series 2025B, Tranche A due 2031 (the “Series 2025B Tranche A Bonds”) and $105 million aggregate principal amount of SIGECO’s 5.52% First Mortgage Bonds, Series 2025B, Tranche B due 2035 (the “Series 2025B Tranche B Bonds” and, together with the Series 2025B Tranche A Bonds, the “Series 2025B Bonds”), and (ii) on October 1, 2025 or such sooner date, as may be selected by SIGECO upon not less than five business days’ advance notice, $45 million aggregate principal amount of SIGECO’s 5.77% First Mortgage Bonds, Series 2025C, Tranche A due 2040 (the “Series 2025C Tranche A Bonds”) and $100 million aggregate principal amount of SIGECO’s 6.18% First Mortgage Bonds, Series 2025C, Tranche B due 2055 (the “Series 2025C Tranche B Bonds”, and together with the Series 2025C Tranche A Bonds, the “Series 2025C Bonds”) in the series and tranche as set forth in the Bond Purchase Agreement.

On July 1, 2025, SIGECO closed on the offering of $205 million aggregate principal amount of the Series 2025B Bonds. The closing of the Series 2025C Bonds is expected to occur on or prior to October 1, 2025. The proceeds of the Series 2025B Bonds were used for, and the proceeds of the 2025C Bonds are expected to be used for, general corporate purposes, including repaying short-term debt, refunding long-term debt at maturity or otherwise, and funding capital expenditures.