The ownership of Arsenal Football Club is considerably different from that of other clubs in English football. It is owned by a parent company, Arsenal Holdings plc, which has relatively few shares which are infrequently traded. Historically, the club has been owned by descendants of the Bracewell-Smith and Hill-Wood families, but since 2007 the club has attracted outside interest and two rival tycoons have acquired significant share holdings. As of 1 July 2011, the majority shareholder in the club is the American Stan Kroenke, who holds 66.64% of the parent company. His rival, the Russian-Uzbek Alisher Usmanov, owns 30.05%. Under Takeover Panel rules, Kroenke must in due course make an offer for every available share in the club.