Bwin.Party Digital Entertainment is an online gambling company, formed by the March 2011 merger of PartyGaming plc and Bwin Interactive Entertainment AG. Formerly the world's largest publicly traded online gambling firm, it is best known for its online poker room PartyPoker and its sports betting brand Bwin (officially styled bwin). It is headquartered in Gibraltar and quoted on the London Stock Exchange. PartyGaming Plc was founded in 1997 with the launch of Starluck Casino. Prior to passage of the Unlawful Internet Gambling Enforcement Act of 2006 by the U.S. Congress, PartyPoker was the world's largest online poker brand (based on cash game revenue and number of players). Its market share has fallen since then, but it remains the third largest online poker room in the world, behind PokerStars and Full Tilt Poker.