Avista(AVA) - 2023 Q4 - Annual Results

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 lena.funston@avistacorp.com Investors: Stacey Wenz (509) 495-2046 stacey.wenz@avistacorp.com Avista 24/7 Media Access (509) 495-4174 Avista Corp. Announces 2023 Results and Initiates 2024 Earnings Guidance • 2023 consolidated earnings per diluted share of $2.24 • Significant improvement in Avista Utilities earnings reflects the benefits of cost recovery and cost management • 2024 consolidated earnings guidance initiated at$2.36 to $2.56 per diluted s ...