Companies
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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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  • 1

    Twentieth Century Fox Film Corp

    Motion Picture and Video Production, Film industry
  • 2

    24 Hour Fitness

    Health Care
  • 3
  • 4

    ABM Industries

    Facility management
  • 5

    ACC Capital Holdings

  • 6

    Accelrys

    Commercial Physical and Biological Research, Software
  • 7

    Activision

    Video game industry, Prepackaged Software
  • 8

    Actuate Corporation

  • 9

    Adaptec

    Computer, Semiconductor and Other Electronic Component Manufacturing
  • 10

    Adio

  • 11

    Adobe Systems

    Software, Computer
  • 12

    AECOM

  • 13

    Aerojet

    Aerospace
  • 14

    Agilent Technologies

    Biotechnology, Electronics industry
  • 15

    Aldila, Inc.

    Sporting and Athletic Goods
  • 16

    Allergan

    Pharmaceutical Preparation, Biotechnology
  • 17

    AMD

    Semiconductor and Other Electronic Component Manufacturing, Semiconductor industry
  • 18

    American Apparel

    Clothing, Retail
  • 19

    American Honda Motor Co., Inc.

  • 20

    ARC Document Solutions

    Direct Mail Advertising Services, Photocopying and Duplicating Services
  • 21

    Ameriflight

  • 22

    Ameriquest Mortgage

  • 23

    Amgen

    Biotechnology, Biological Product (except Diagnostic) Manufacturing
  • 24
  • 25

    AnaSpec

    Biotechnology