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A subsidiary, subsidiary company or daughter company is a company that is owned or controlled by another company, which is called the parent company, parent, or holding company. The subsidiary can be a company, corporation, or limited liability company. In some cases it is a government or state-owned enterprise. In some cases, particularly in the music and book publishing industries, subsidiaries are referred to as imprints.
In the United States railroad industry, an operating subsidiary is a company that is a subsidiary but operates with its own identity, locomotives and rolling stock. In contrast, a non-operating subsidiary would exist on paper only (i.e., stocks, bonds, articles of incorporation) and would use the identity of the parent company.
Subsidiaries are a common feature of business life, and most multinational corporations organize their operations in this way. Examples include holding companies such as Berkshire Hathaway, Leucadia National Corporation, Time Warner, or Citigroup; as well as more focused companies such as IBM or Xerox. These, and others, organize their businesses into national and functional subsidiaries, often with multiple levels of subsidiaries.