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The largest apparel company in the world is VF Corporation.
Russia
Ladbrokes's motto is 'The world's leading sports betting and gaming company.'.
The McCormick company was the largest spice company
Exxon Mobil is the largest oil company. It is also the world's largest company.
AMGN is the company Amgen Inc which is listed in the stock exchange. It is the world's largest independent biotechnology firm headquartered in Thousand oaks, California.
deVere and Partners is a financial consulting company and in fact is the world's largest independent financial consultant group. They have offices world wide.
Informatica specializes in providing data integration software to businesses of all sizes. It is the largest independent provider of this software in the world.
Oreo cookies are the largest snack food company in the world.
International Paper Company (IP) was the world's largest paper company in the early 2000s
Do you mean what is the largest IT company in the world. Or do you mean within IT which is the largest sector?
B.H.P. Billiton