Avista Corporation

AVA·NYSE·$41.50Share Price as of 11/2·$3BMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/03/26 10-QQ1 ended 03/31/2605/05/26 10-KFY 202502/25/26 10-QQ3 ended 09/30/2511/05/25 10-QQ2 ended 06/30/2508/06/25

Disclosures

8-KCurrent report08/19/26 8-KCurrent report08/03/26 8-KCurrent report08/03/26 8-KCurrent report07/02/26 8-KCurrent report06/12/26

Prospectuses and Registrations

S-8Registration of securities for employees04/27/26 424B5Prospectus supplement08/08/25 424B5Prospectus supplement05/07/25 S-3ASRAutomatic shelf registration05/07/25 424B5Prospectus supplement05/07/24

Proxies

DEF 14ADefinitive proxy04/01/26 DEFA14AAdditional proxy materials04/01/26 DEF 14ADefinitive proxy03/26/25 DEFA14AAdditional proxy materials03/26/25 DEF 14ADefinitive proxy03/20/24

Ownership

Form 3Initial insider ownership10/01/26 Form 3Initial insider ownership10/01/26 144Proposed sale of securities09/02/26 Form 4Insider transaction09/02/26 Form 4Insider transaction09/02/26

Other

11-KEmployee stock purchase plan report06/26/26 ARSAnnual report to shareholders04/01/26 11-KEmployee stock purchase plan report06/23/25 ARSAnnual report to shareholders03/26/25 11-KEmployee stock purchase plan report06/26/24