After the launch of PartyPoker.com in 2001, PartyGaming Plc grew to generate more than $500 million in annual profits by 2005. In June 2005, PartyGaming Plc floated its IPO on the London Stock Exchange at a value of £4.64 billion ($8.46 billion), and in September of that year was admitted to the FTSE 100 list of companies. In October 2006, PartyGaming publicly withdrew from the U.S. market after the passage of the Unlawful Internet Gambling Enforcement Act of 2006, a piece of anti-gambling legislation approved by the United States Congress as part of the SAFE Port Act. As a result, the company’s share price dropped 60% and the company subsequently withdrew from the FTSE 100 Index.