0000104918 2025-08-08 2025-08-08 0000104918 1 2025-08-08 2025-08-08 0000104918 2 2025-08-08 2025-08-08 iso4217:USD pure shares S-3 424B5 EX-FILING FEES 333-287023 0000104918 AVISTA CORP N/A N/A false S-3 AVISTA CORP false Equity Common Stock true 5500000 37.03 203665000.00 0.0001531 31181.11 Equity Common Stock true 584042 22590744.56 S-3 333-264790 2022-05-09 2489.50 226255744.56 31181.11 0.00 0.00 31181.11 (1) Of the 6,084,042 shares of Common Stock offered by this prospectus supplement and the accompanying prospectus, 5,500,000 shares are newly registered. The registration fee with respect to such shares was calculated under Rule 457(c) by multiplying such number of shares by $37.03, the average of the high and low prices for the Common Stock of Avista Corporation on August 7, 2025, as reported in the consolidated reporting system for NYSE listed securities, by 0.00015310, the currently applicable fee rate. Such registration fee is being paid contemporaneously with the filing of this prospectus supplement. (2) Of the 6,084,042 shares of Common Stock offered by this prospectus supplement and the accompanying prospectus, 584,042 shares were included in the 4,000,000 shares offered by the Registrant's prospectus supplement, dated and filed under Rule 424(b)(5) on August 2, 2023 under Registration Statement, No. 333-264790, and the accompanying prospectus, but remain unsold. A registration fee of $17,050.14 was paid contemporaneously with the filing of such prospectus supplement, and the portion of such registration fee allocable to the aforesaid 584,042 shares (calculated by multiplying such number of shares by the then applicable market price per share of $38.68 and multiplying that product by the then applicable fee rate of 0.0001102) was $2,489.50. No further registration fee is due with respect to such shares.