American Electric Power Company, Inc. filed its quarterly report for the period ended September 30, 2026, with the Securities and Exchange Commission on October 28, 2026, covering the parent company and seven subsidiary registrants including AEP Texas Inc., AEP Transmission Company, LLC, Appalachian Power Company, Indiana Michigan Power Company, Ohio Power Company, Public Service Company of Oklahoma, and Southwestern Electric Power Company.

Key Highlights

  • Period covered: The quarterly report covers the three months ended September 30, 2026.
  • Parent share count: American Electric Power Company, Inc. had 544,526,330 shares of common stock outstanding as of October 28, 2026, with a par value of $6.50 per share.
  • Multiple registrants: Eight separate registrants filed this combined report, each filing on its own behalf.
  • Large accelerated filer: American Electric Power Company, Inc. is classified as a large accelerated filer; the subsidiary registrants are each classified as non-accelerated filers.
  • Reduced disclosure format: Seven subsidiaries, including AEP Texas Inc. and Appalachian Power Company, filed under the reduced disclosure format specified in General Instruction H(2).
  • Exchange listing: American Electric Power Company, Inc. common stock is listed on NASDAQ:AEP.

American Electric Power's September 2026 Quarterly Filing: Eight Registrants, One Combined Report

American Electric Power Company, Inc., an investor-owned electric public utility holding company headquartered at 1 Riverside Plaza, Columbus, Ohio, submitted this combined quarterly report on behalf of itself and seven subsidiary companies. According to the filing, AEP's operations span transmission and distribution across multiple states, with subsidiaries serving customers in regions including west, central and southern Texas through AEP Texas Inc., and Appalachian regions through Appalachian Power Company. The filing also discloses the role of AEP Transmission Company, LLC as an intermediate holding company owning the State Transcos.

The filing notes that AEP Texas Inc., AEP Transmission Company, LLC, Appalachian Power Company, Indiana Michigan Power Company, Ohio Power Company, Public Service Company of Oklahoma, and Southwestern Electric Power Company "meet the conditions set forth in General Instruction H(1)(a) and (b) of Form 10-Q and are therefore filing this Form 10-Q with the reduced disclosure format." Each subsidiary registrant, according to the filing, "makes no representation as to information relating to the other registrants." AEP Transmission Company, LLC is noted as 100% held by AEP Transmission Holding Company, LLC, itself a wholly-owned subsidiary of American Electric Power Company, Inc.

Among the other subsidiary share counts disclosed as of October 28, 2026: AEP Texas Inc. had 100 shares outstanding at $0.01 par value; Appalachian Power Company had 13,499,500 shares (no par value); Indiana Michigan Power Company had 1,400,000 shares (no par value); Ohio Power Company had 27,952,473 shares (no par value); Public Service Company of Oklahoma had 9,013,000 shares at $15 par value; and Southwestern Electric Power Company had 3,680 shares at $18 par value. The registrants confirmed they are not shell companies and have filed all required reports during the preceding 12 months.

What Was Disclosed

This combined quarterly report filed October 28, 2026 covers eight registrants within the AEP corporate family for the period ended September 30, 2026, disclosing share counts, filer classifications, exchange listing under NASDAQ:AEP, and the organizational structure of AEP's transmission and utility subsidiaries.