X0306 4 2013-01-02 0 0000104918 AVISTA CORP AVA 0001466556 Thoren Diane C 1411 E. MISSION AVENUE SPOKANE WA 99202 0 0 0 1 Treasurer Common Stock - 2010 Restricted Shares Award 2013-01-02 4 F 0 44 24.57 D 4331 D Common Stock - 2011 Restricted Shares Award 2013-01-02 4 F 0 88 24.57 D 4243 D Common Stock - 2012 Restricted Shares Award 2013-01-02 4 F 0 60 24.57 D 4183 D Common Stock held in 401(k) 4761 I by Trustee Common Stock Executive Deferral Account 1012 I by Trustee Common Stock held by grandson, Zachary Brown 41 I by grandson, Z Brown Common Stock held by niece, Katherine Cuthill 41 I by niece, K Cuthill Common Stock held by niece, McIntyre Cuthill 13 I by niece, McIntyre Cuthill Common Stock held by granddaughter, McKenzie Brown 25 I by granddaughter, M Brown Common Stock held by grandson, Colton Materne 15 I by grandson, C Materne Common Stock held by granddaughter, Avery Materne 7 I by granddaughter, A Materne Shares sold to pay income tax on final 1/3 of 2010 Restricted Shares that vested on 1/2/2013 Shares sold to pay income tax on second 1/3 and final 1/3 of 2011 Restricted Shares that vested on 1/2/2013 due to early retirement. Shares sold to pay income tax on entire 2012 Restricted Shares due to early retirement. /s/ Diane C Thoren 2013-01-04