Pinnacle West(PNW) - 2025 Q4 - Annual Results

Exhibit 99.1 For the quarter ended Dec. 31, 2025, Pinnacle West reported consolidated net income attributable to common shareholders of $15.4 million, or $0.13 per diluted share, compared with a net loss of $6.8 million, or a loss of $0.06 per diluted share, for the same period in 2024. The higher 2025 full-year results reflect an increase of about $8 million, primarily as a result of increased customer usage, customer growth and related pricing; higher transmission revenues; and impacts of the 2022 rate ca ...