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Companies Headquartered in California

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A list of Californian companies. Many well known California companies have been included. While this list isn't definitive, these are most of the top businesses in the state of California. As a country, the United States has encouraged entrepreneurship throughout much of its history. The state of California is no exception to this rule, and new businesses are started in California daily, ranging from corporations to LLCs to partnerships to sole proprietorships. This list, however, is mostly focused on the largest corporations in the state of California.

This list answers the question of "what companies are based in California?" There are a significant number of the world's largest corporations that are based in the Golden State. Many of the biggest technology companies are based here, including Google, Facebook and eBay amongst the most prominent. 
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  • Twentieth Century Fox Film Corp1

    Twentieth Century Fox Film Corp

    Motion Picture and Video Production, Film industry
  • 24 Hour Fitness2

    24 Hour Fitness

    Health Care
  • A&M Records3
  • ABM Industries4

    ABM Industries

    Facility management
  • ACC Capital Holdings5

    ACC Capital Holdings

  • Accelrys6


    Commercial Physical and Biological Research, Software
  • Activision7


    Video game industry, Prepackaged Software
  • Actuate Corporation8

    Actuate Corporation

  • Adaptec9


    Computer, Semiconductor and Other Electronic Component Manufacturing
  • Adio10


  • Adobe Systems11

    Adobe Systems

    Software, Computer
  • AECOM12


  • Aerojet13


  • Agilent Technologies14

    Agilent Technologies

    Biotechnology, Electronics industry
  • Aldila, Inc.15

    Aldila, Inc.

    Sporting and Athletic Goods
  • Allergan16


    Pharmaceutical Preparation, Biotechnology
  • AMD17


    Semiconductor and Other Electronic Component Manufacturing, Semiconductor industry
  • American Apparel18

    American Apparel

    Clothing, Retail
  • American Honda Motor Co., Inc.19

    American Honda Motor Co., Inc.

  • ARC Document Solutions20

    ARC Document Solutions

    Direct Mail Advertising Services, Photocopying and Duplicating Services
  • Ameriflight21


  • Ameriquest Mortgage22

    Ameriquest Mortgage

  • Amgen23


    Biotechnology, Biological Product (except Diagnostic) Manufacturing
  • Amy's Kitchen24
  • AnaSpec25