144 0001943093 XXXXXXXX LIVE 0000104918 AVISTA CORP 001-03701 1411 E MISSION AVE SPOKANE WA 99202 5094890500 DiLuciano Joshua D Officer Vice President Energy Delivery Common Stock Citigroup Global Markets, Inc

390 Greenwich St New York NY 10013

3857 143626.19 83752830 09/02/2026 NYSE Common Stock Georgeson Securities Corp

144 Fernwood Ave Edison NJ 08837

818 30472.22 83752830 09/02/2026 NYSE Common Stock 09/02/2026 Retained Shares Avista Corporation N 4675 09/02/2026 Compensation Y Dates acquired and dates sold are on various dates 09/02/2026 Conformed Signature On File