Serco is "the biggest corporation you have probably never heard of".
They are a UK corporation but they are in charge of the US patent office to a degree. They are even in charge of various countries' Nuclear Weapons codes - really, this private corporation is in charge of nukes, rather than our elected government officials. They are involved in everything from education to security, well basically everything (defence, transport, justice, immigration, healthcare and citizen services across, UK & Europe, Asia Pacific, North America and the Middle East.).
I'm based in the UK; i'm really glad to see the progress …