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With a market value of $ 152.6bn , the oil and gas company BP employs 73,000 people , and gives its revenue as $ 299bn . Formerly British Petroleum , its current name is not an acronym , instead reflecting the fact it is no longer majority state owned . From its headquarters in London , the company oversees some 18,700 retail sites and produces the equivalent of 3.7mn barrels of oil per day .

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