golden share
n.— «Governments often retain control of privatized companies by granting themselves “special rights”—also known as “golden shares”—that go beyond the rights associated with normal shareholding. Through such rights they often restrict foreign ownership, limit voting rights or influence management decisions in the companies concerned.» —“The European Corporate Governance Action Plan: Setting priorities” by Charlie McCreevy in Luxembourg EUROPA June 28, 2005. (source: Double-Tongued Dictionary)