Exhibit 99.1 As an additional affordability measure, AEP continues to utilize grants and low-cost loans from the U.S. Department of Energy (DOE) to drive customer savings. Most recently, AEP Texas secured a DOE loan for up to $3.3 billion to support nearly 100 transmission projects, which is expected to save customers $685 million in interest costs over the life of the loan. 1 • Raises full-year 2026 operating earnings guidance to $6.25 to $6.55 per share • Supports affordability with up to $16 billion in e ...