X0304 4 2012-01-06 0 0000104918 AVISTA CORP AVA 0001466556 Thoren Diane C 1411 E. MISSION AVENUE SPOKANE WA 99202 0 0 0 1 Treasurer Common Stock 2012-01-06 4 F 0 125 25.58 D 267 D Common Stock held in 401(k) Plan 4350 I held by Trustee Common Stock held in Executive Deferral Account 975 I Held by Trustee Common Stock held by Grandson, Zachary Brown 39 I Held by Grandson Common Stock held by Niece, Katherine Cuthill 39 I Held by Granddaughter Common Stock held by Niece, McIntyre Cuthill 13 I Held by Niece Common Stock held by Granddaughter, McKenzie Brown 24 I Held by Granddaughter Common Stock held by Grandson, Colton Materne 14 I Held by Grandson Common Stock held by Granddaughter, Avery Materne 7 I Held by Granddaughter Shares withheld to pay income taxes on restricted shares which vested 1/6/2012 covering 2009, 2010 and 2011. /s/ Diane C Thoren 2012-01-09