X0306 4 2023-01-03 0 0000104918 AVISTA CORP AVA 0001194298 THIES MARK T 1411 E. MISSION AVENUE SPOKANE WA 99202 0 1 0 0 EVP, CFO & Treasurer Common Stock 2023-01-03 4 F 0 1157 44.79 D 133093 D Common Stock in Spouse's Plan 5751 I Shares Held by Spouse Shares sold to pay income tax on final 1/3 of 2020, second 1/3 of 2021 and first 1/3 of 2022 restricted shares that vested on January 3, 2023. /s/Mark T. Thies 2023-01-05