Avista Corp. is a holding company, which engages in the provision of electric and natural gas utility business. It operates through the following segments: Avista Utilities, Alaska Electric Light and Power Compan) (AEL&P), and Other. The Avista Utilities segment includes electric distribution and transmission, and natural gas distribution services in parts of eastern Washington, northern Idaho, and northeastern and southwestern Oregon.
The AEL&P segment offers electric services in Juneau. The Other segment comprises of other investments and operations of various subsidiaries, as well as certain other operations of Avista Capital. The company was founded on March 13, 1889 and is headquartered in Spokane, WA.