UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of report (Date of earliest event reported): May 3, 2012

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o            Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o            Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o            Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o            Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

This combined Form 8-K is separately filed or furnished by Pinnacle West Capital Corporation and Arizona Public Service Company.  Each registrant is filing or furnishing on its own behalf all of the information contained in this Form 8-K that relates to such registrant and, where required, its subsidiaries.  Except as stated in the preceding sentence, neither registrant is filing or furnishing any information that does not relate to such registrant, and therefore makes no representation as to any such information.

Item 2.02.  Results of Operations and Financial Condition.

Item 7.01.  Regulation FD Disclosure.

The following information is furnished pursuant to both Item 2.02 and 7.01.

On May 3, 2012, Pinnacle West Capital Corporation (the “Company” or “Pinnacle West”) issued a press release regarding its financial results for the fiscal quarter ended March 31, 2012.  A copy of the press release is attached hereto as Exhibit 99.1.

The Company is providing a quarterly consolidated statistical summary and a copy of the slide presentation made in connection with the quarterly earnings conference call on May 3, 2012.  This information contains Company operating results for the fiscal quarter ended March 31, 2012 and is attached hereto as Exhibits 99.2 and 99.3.  The summary and slide presentation are concurrently being posted to the Company’s website at www.pinnaclewest.com, which also contains a glossary of relevant terms.

Item 8.01  Other Events.

Recommended Order in APS General Retail Rate Case

On May 2, 2012, the administrative law judge in Arizona Public Service Company’s (“APS”) general retail rate case pending before the Arizona Corporation Commission (“ACC”) issued a recommended order in the proceeding.  The order recommends ACC approval of the regulatory settlement agreement proposed by APS and other parties to the rate case without material modifications.  Parties to the proceeding may file exceptions to the recommended order on or before May 11, 2012.

For additional information, see “Retail Rate Case Filing with the Arizona Corporation Commission” in Note 3 of Notes to Condensed Consolidated Financial Statements in the Pinnacle West/APS Quarterly Report on Form 10-Q for the quarter ended March 31, 2012.

Item 9.01.                                          Financial Statements and Exhibits.

(d)                                  Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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Exhibit Index

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