PUBLIC SERVICE COMMISSION OF WEST VIRGINIA CHARLESTON CASE NO. NOIR APCO and WHEELING 26A APPALACHIAN POWER COMPANY and WHEELING POWER COMPANY Notice of Intent to File General Base Rate Case. PUBLIC NOTICE OF CHANGE IN RATES and HEARING On April 6, 2026, Appalachian Power Company and Wheeling Power Company (Companies) filed a Notice of Intent to file a general base rate case (NOI). On April 16, 2026, the Public Service Commission of West Virginia (Commission) issued an Order in the above-referenced proceeding regarding the NOI (Order), stating that the Commission had considered whether there is any alternative that could: extend the timing between general base rate cases, levelize and moderate the magnitude of future rate increases and incentivize the Companies to control costs, while allowing the Companies to timely recover reasonable and prudently incurred costs. As an alternative, the Order authorized the Companies to increase their existing base rates pursuant to a "limited inflation-based revenue adjustment," effective June 1, 2026, provided the Companies agree to withdraw their NOI; and not file a base rate case on or before June 1, 2027, subject to the Companies agreeing to Commission conditions. The Companies accepted this alternative and its conditions. On April 23, 2026, in accordance with the Order, the Companies filed an affidavit of an authorized corporate executive wherein the Companies: (1) agreed that they have reviewed the Commission's Final Order entered on March 31, 2026, in Case No. 25-0310-E-P and will proceed with the securitization authorized therein, unless otherwise ordered; (2) agreed to file a motion to withdraw the NOI; and (3) agreed not to file a West Virginia base rate case prior to June 1, 2027. Thereby satisfying the Commission's conditions and allow the inflation-based rate adjustment to base rates become effective on June 1, 2026. On May 29, 2026, the Commission extended the effective date to July 1, 2026, after proposal by Commission Staff and acceptance by the Companies. Once effective, the proposed inflation-based rate adjustment to base rates will: increase the Companies' residential and commercial base rates by 4.0 percent, and increase the Companies' industrial base rates by 2.5 percent, excluding Special Contract rates, resulting in an overall base rate increase of 3.5 percent, or approximately $40.1 million annually. The impact of the inflation-based rate adjustment to base rates on an average monthly bill by customer class is: Residential ($) Increase/(Decrease) $5.12 (%) Increase/(Decrease) 2.77% Commercial ($) Increase/(Decrease) $11.32 (%) Increase/(Decrease) 2.57% Industrial ($) Increase/(Decrease) $2,797.00 (%) Increase/(Decrease) 0.99% Other ($) Increase/(Decrease) $0.00 (%) Increase/(Decrease) 0.00% The increases shown are based on averages of all customers in the indicated class. Individual customers may experience increases that are greater or less than the average. A residential customer using 1,000 kWh per month would experience a monthly increase over current rates of $4.84, or 2.74 percent. The Companies filed with the Commission updated Tariff Sheets reflecting the above-described inflation-based rate adjustment and resulting revised base rates, effective as of June 1, 2026 (now suspended). A complete copy of the Companies' tariffs, as well as a representative of the Companies to provide information requested concerning them, are available to all customers, prospective customers, or their agents at any of the offices of the Companies. The Commissioners will hold a hearing in this matter on June 9, 2026, in the Howard M. Cunningham hearing room at the Commission headquarters at 201 Brooks St., Charleston, West Virginia, beginning at 9:30 a.m. Copies of the Companies' tariffs are also available for public inspection at the office of the Executive Secretary of the Public Service Commission at 201 Brooks Street, Charleston, West Virginia. Anyone desiring to protest or comment should file a written comment prior to July 1, 2026. Anyone desiring to file protest or comments or participate on the record in public comment proceedings may do so without formally intervening. Protests and comments may be filed online through the Public Service Commission website (www.psc.state.wv.us) using the "Submit Comment" link or may be mailed or hand delivered to the Executive Secretary Public Service Commission of West Virginia, P.O. Box 812, 201 Brooks St., Charleston, West Virginia 25323. APPALACHIAN POWER COMPANY & WHEELING POWER COMPANY LC-469379 06-06;2026