Liberty Global is a multinational telecommunications company with headquarters in London, Amsterdam and Denver. It was formed in 2005 by the merger of the international arm of Liberty Media (in turn a spin-off of TCI, an American cable-television group) and UGC (UnitedGlobalCom). Liberty Global is the largest broadband internet service provider outside the US.Liberty Global had an annual revenue of $15 billion in 2017, with operations in 10 countries and 26,700 employees by 2017. Its cable services pass 44.3 million homes, with 21 million customers or 44.5 million RGUs (video, internet, and voice subscribers). In 2016, Liberty Global was ranked 88th on the Forbes World's Most Innovative Companies list.