For the purpose of the Stock Exchange, an investor holding 30% or more of a listed company's shares. Such a shareholder will only be permitted for a listed company if it can be demonstrated that any conflicts of interest arising between the controlling shareholder and the interests of other shareholders will be suitably managed. Dresdner Kleinwort Wasserstein financial glossary
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controlling shareholder UK US noun [C] (also controlling stockholder) FINANCE, STOCK MARKET
► a shareholder who owns enough shares in a company to control its management: »
With 30% of the equity and 65% of the voting rights, they have become the corporation’s new controlling shareholder.
Financial and business terms. 2012.