AFC Ajax NV is mostly known as a football club. Since 17 May 1998 the club is registered as a Naamloze vennootschap listed on the stock exchange Euronext Amsterdam. As a company the club strives to make a profit through ticket sales, as well as through income accumulated by competing in national, continental and global football. Half of the revenue is generated through club merchandise, advertising, and income from selling broadcasting rights. Ajax is the only Dutch club with an initial public offering. Outside the Netherlands in countries such as the UK, Germany, Italy or Turkey there are more football clubs with IPOs, including Manchester United, who are accredited with advising Ajax Amsterdam to enter the stock market. Several members of Ajax Board of Commissioners have a financial background in trade. For example, former treasurer of the club Arie van Os was a famous stockbroker from Amsterdam. Only a limited amount of the shares in AFC Ajax NV are publicly traded on the Stock Market. The "Vereniging AFC Ajax" retain 73% of the shares. Wikipedia