Exhibit 21.1
  2)
    
    APS Energy Services Company, Inc.3)
    
    El Dorado Investment Company4)
    
    Pinnacle West Energy Corporation (merged into PWCC 8/1/06)5)
    
    SunCor Development Company6)
    
    APSES Holdings, Inc.APS Energy L.P. (dissolved 9/29/06)7)
    
    Pinnacle West Marketing & Trading Co., LLC
  1)
    
    GenWest, LLC                          } now under PWCC2)
    
    APACS Holdings, LLC             } now under PWCC
  1)
    
    APS Foundation, Inc.2)
    
    Axiom Power Solutions, Inc.3)
    
    BIXCO, Inc.4)
    
    PWE NEWCO, Inc.5)
    
    Powertree Carbon Co., LLC
  1)
    
    Apex Power LLC2)
    
    Northwind Phoenix LLC (a Delaware LLC/subsidiary of APSES)3)
    
    Tucson District Energy, LLC (an Arizona LLC/subsidiary of Northwind Phx
LLC)4)
    
    Crest Power, LLC
 /
 1)
    
    Acoustic Locating Services, LLC2)
    
    Aegis Technologies, Inc. (dissolved in 2009)3)
    
    Arizona Business Accelerator4)
    
    Arizona Professional Baseball Ltd Partnership5)
    
    Dominion Fund II (Dissolved as of 12/31/02)6)
    
    El Dorado Ventures / El Dorado Ventures II (Dissolved as of 12/31/02)7)
    
    El Dorado Ventures III (Dissolving)8)
    
    Gateway Data Sciences Corp. (Dissolved as of 12/31/02)9)
    
    NAC Holding Inc./ NAC International Inc. (All stock sold on 11/18/04 to USEC, Inc)10)
    
    NxtPhase Corporation (sold in 2009)11)
    
    Phoenix Downtown Theater LLC12)
    
    Phoenix Suns Ltd Partnership (Sold on 6/30/04)13)
    
    PowerOneData, Inc. (sold in 2008)14)
    
    Serveron Corporation (sold in 2007)15)
    
    Underground Imaging Technologies, LLC (Vermeer Manufacturing Company)
  1.
    
    Avimor Water Reclamation Company (fka Foothills Sewer
Company, Inc.)2.
    
    Centrepoint Associates, LLC (Kimco)3.
    
    Club West Golf Course, LLC4.
    
    Coral Canyon HD, LLC (SITLA)5.
    
    Golf de Mexico, S.A. de C.V.6.
    
    Hayden Ferry Lakeside, LLC (SunCor is Sole Member-
purchased Benton-Robb interest)
 Lakeside Residential Communities, LLC
 BV at Hayden Ferry Lakeside, LLCEdgewater at Hayden Ferry Lakeside, LLCWaterford at Hayden Ferry Lakeside, LLC
 Hayden Ferry Lakeside II, LLCHayden Ferry Lakeside III, LL7.
    
    Hidden Hills of Scottsdale, LLC8.
    
    Highland Water Company, Inc.9.
    
    Kabuto SunCor JV (Kabuto Intl Corp.)10.
    
    Marina Heights, LLC11.
    
    Palm Valley 303 Building 1, LLC12.
    
    Palm Valley Golf Club, Inc.13.
    
    Palm Valley Professional Plaza, LLC14.
    
    Rancho Viejo de Santa Fe, Inc.
 Rancho Viejo Village Center, LLC (Dissolved
04-04-05)Ranchland Utility CompanySanta Fe Water Resource Alliance, LLC
 15.
    
    Riverside Distribution Center, LLC (Ryan Buckeye, LLC)16.
    
    Scottsdale Mountain Limited Partnership17.
    
    SDC Prescott, LLC18.
    
    SDC Prescott Valley, LLC19.
    
    SDC Yavapai, LLC20.
    
    Sedona Golf Resort LC (Sedona Assoc. LP)21.
    
    StoneRidge Commercial, LLC22.
    
    StoneRidge  Prescott Valley LLC
 StoneRidge Golf Course, LLC
 23.
    
    SunCor Homes, Inc. (fka Golden Heritage Homes, Inc.)
 SunCor Construction AZ, Inc. (fka Golden Heritage
Construction, Inc.)
 Golden Heritage Construction Nevada, LLC
 SunCor Financial, LLC (fka HFS Mortgage, LLC)24.
    
    SunCor Construction, Inc. (fka SCM, Inc.)25.
    
    SunCor Golf, Inc.
 Westworld Golf Course, LLC
 26.
    
    SunCor Idaho, Inc.
 Avimor, LLC (fka SunCor Idaho, LLC and Spring Valley
Development, LLC)SunCor Realty & Management Idaho, LLC
 27.
    
    SunCor New Mexico, Inc.
 SunCor Albuquerque, LLCSunCor Construction NM, LLC
 28.
    
    SunCor Realty & Management Company29.
    
    SunCor Utah, Inc.
 Coral Canyon Town Center, LLC (SITLA and Southern Utah
Homebuilders Association)Coral Canyon Town Center II, LLC (SITLA)
 30.
    
    SunRidge Canyon, LLC31.
    
    Talavi Associates, LLC (WLD Partners)32.
    
    TypeTwo, Inc. (Kabuto Intl Corp.)