AVISTA CORP

Ticker: AVA CUSIP: 05379B107 Class: Common Stock

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

Note: Option positions (PUT/CALL) are excluded.

Q1 2014

Shares 18,634 Value ($000) $571 Avg Close $18.00 Range $17.07 - $19.19

Q4 2013

Shares 17,501 Value ($000) $493 Avg Close $16.79 Range $15.77 - $17.52

Q3 2013

Shares 16,466 Value ($000) $435 Avg Close $16.58 Range $15.56 - $17.59

Q2 2013

Shares 16,502 Value ($000) $446 Avg Close $16.44 Range $15.47 - $17.44

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	18,634	$571	$18.00	$17.07 - $19.19
Q4 2013	17,501	$493	$16.79	$15.77 - $17.52
Q3 2013	16,466	$435	$16.58	$15.56 - $17.59
Q2 2013	16,502	$446	$16.44	$15.47 - $17.44