OGE ENERGY CORP.

During the three months ended June 30, 2025, no director or officer of the Registrants adopted orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

On July 29, 2025, OGE Energy's Board of Directors elected a new director, Lyle G. Ganske, effective August 1, 2025. Mr. Ganske’s term will expire at OGE Energy's Annual Meeting of Shareholders scheduled for May 14, 2026, at which time he is expected to be nominated for approval by OGE Energy's shareholders. Mr. Ganske will serve on the Nominating, Corporate Governance and Stewardship Committee. Mr. Ganske will receive compensation for his Board service that is consistent with compensation received by OGE Energy's other non-employee directors (which is described in Exhibit 10.10 to OGE Energy’s 2024 Form 10-K).

Mr. Ganske, 66, brings extensive experience to OGE Energy's Board. Mr. Ganske brings more than 40 years' experience in advising boards of directors on fiduciary duty-related matters, corporate governance, and corporate transactions. He currently serves as Of Counsel at the law firm of Jones Day, after serving in multiple leadership roles including head of the firm’s Global M&A Practice. His expertise includes M&A, corporate governance, executive compensation, and general corporate counseling, covering various industries such as energy, manufacturing, retailing, telecom, utilities, and process industries.