PHOENIX – Pinnacle West Capital Corporation (NYSE: PNW) management will present to energy industry analysts and investors at the Bank of America/Merrill Lynch 2011 Power and Gas Leaders Conference in New York on Tuesday, September 20.

The Pinnacle West presentation is scheduled to begin at 1:30 p.m. ET (10:30 a.m. Ariz. time) and will feature a Company overview, update on strategic initiatives and a panel discussion with other participants. The presentation and panel discussion will be webcast live and available for replay at: www.pinnaclewest.com/presentations.

Pinnacle West, an energy holding company based in Phoenix, has consolidated assets of about $12.5 billion, more than 6,300 megawatts of generating capacity and about 6,700 employees in Arizona and New Mexico. Through its principal subsidiary, Arizona Public Service, the Company provides retail electricity service to more than 1.1 million Arizona homes and businesses. For more information about Pinnacle West, visit the Company’s website at pinnaclewest.com.

Contacts

Media:
Alan Bunnell, (602) 250-3376

Analyst:
Rebecca Hickman, (602) 250-5668
Geoffrey Wendt, (602) 250-5643