Charles and David Koch hit a milestone on Wednesday, as a $1.3 billion boost to their collective fortune sent their net worth above $100 billion, according to Bloomberg News.
The brothers are majority stakeholders in Koch Industries, the second-largest privately held company in the U.S., after Cargill Inc. They are now the fifth- and sixth-wealthiest people in the world.
While half the country may not be familiar with the Koch brothers, according to a recent poll, the pair has poured millions into conservative campaigns and causes. The brothers’ most recent advertising campaign will target key Senate races in Colorado and Iowa, chastising Democratic candidates Mark Udall and Bruce Braley for supporting the Affordable Care Act.