Both are used in British English for companies, though the plural form is more common. It (to some extent) depends on which aspect of the company you are emphas

Both are used in British English for companies, though the plural form is more common. It (to some extent) depends on which aspect of the company you are emphasising (though usage is not always consistent in that regard). Consider "TeamA is a football club" and "TeamA are beating TeamB". In the first example, TeamA is considered a singular entity, and you aren't really concerned with its makeup (though "TeamA are a football club" would also be correct). In the second, TeamA is a group descriptor as it is a group of players that are winning the match, not the single legal/business entity. AFAIK, the plural usage for business names is the most common usage in British English, though it also varies between British dialects (it always surprises me how much dialects vary in English - some areas of England still use an informal form of "you" occasionally, for example)