A business magnate (or industrialist) is an entrepreneur or business owner who has achieved significant success, wealth, and prominence from a particular industry
(or range of industries). In particular, the term refers to a
successful entrepreneur or business owner who controls, through personal
business ownership or via a majority dominant shareholding position in
any business venture, business firm, company, corporation, enterprise,
or for-profit organization and utilizes the organization's goods,
products, or services is consumed by a large number of individuals,
groups, or other organizations. Business owners with significant
control, ownership, and influence of a large business, company,
corporation, enterprise, or for-profit organization may also be called czars, moguls, tycoons, taipans, proprietors, industrialists, barons, or oligarchs.
Source: Wikipedia