The answer lies within the history of their family business: Koch Industries. Here's a look at how the brothers became billionaires in the first place.

(Bloomberg) -- Koch Industries Inc., the second-largest closely held firm in the US, is changing its name after nearly six decades, along with its corporate structure. The top-level holding ...

Into this void steps Charles Koch, chairman and CEO of Koch Industries, and author of the new book Good Profit: How Creating Value for Others Built One of the World’s Most Successful Companies.

After expanding the Kansas-based Koch Industries into one of the world's largest privately held corporations, Koch and his brother contributed hundreds of millions to GOP candidates through their ...

On the other invisible hand, the really invisible one, he has deployed his vast wherewithal to working away in the dark, to manipulate the market every which way and mold it to best serve the bottom ...