Summary of PINNACLE WEST CAPITAL CORP

Item 2.02. Results of Operations and Financial Condition
On October 29, 2009, Pinnacle West Capital Corporation (the "Company") issued a press release regarding its financial results for the fiscal quarter ended September 30, 2009 and its earnings outlook for 2009 and 2010. A copy of the press release is attached hereto as Exhibit 99.1.
The information referenced in Item 7.01 below contains Company operating results for the fiscal quarter ended September 30, 2009. This information is attached hereto as Exhibits 99.2 and 99.3.
Item 7.01. Regulation FD Disclosure
The Company is providing a quarterly consolidated statistical summary, a copy of the slide presentation made in connection with the quarterly earnings conference call on October 29, 2009, and key factors and assumptions affecting consolidated earnings outlook for 2009 to help interested parties better understand its business (see Exhibits 99.2, 99.3 and 99.4). This information is concurrently being posted to the Company's website at www.pinnaclewest.com, which also contains a glossary of relevant terms.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

   Exhibit
     No.          Registrant(s)                        Description

     99.1         Pinnacle West    Earnings News Release issued on October 29, 2009.
                       APS

     99.2         Pinnacle West    Pinnacle West Capital Corporation quarterly
                       APS         consolidated statistical summary for the three-month
                                   and nine-month periods ended September 30, 2009 and
                                   2008.

     99.3         Pinnacle West    Pinnacle West Capital Corporation Third Quarter 2009
                       APS         slide presentation accompanying October 29, 2009
                                   conference call.

     99.4         Pinnacle West    2009 Earnings Outlook Key Factors and Assumptions
                       APS