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David and Charles Koch are two of the richest people on earth.
- The $4 are two of the richest men in the world.
- $4 and $4 Koch each have a net worth of $53.7 billion, according to $4.
- Their fortunes come from their 42% stakes in the Koch family business: $4.
- Charles is currently the company's president and CEO, while David just $4 that he was retiring from the firm.
The $4 are two of the richest people on planet earth.
Charles and David Koch tied for eighth on Forbes' 2018 $4 of the wealthiest billionaires in the world.
And they're also two of the most controversial billionaires out there, at least when it comes to their political contributions. Jane Mayer's 2015 book "$4" outlined how the two Kansas natives reportedly used their fortunes to forge a formidable web of political influence, with the intent of promoting their libertarian values.
Still, that hasn't stopped the Kochs from clashing with figures on the right, mostly notably US president Donald Trump. The two brothers have spoken out against Trump's $4.
So how did the Kochs come to amass so much wealth and wield such influence in the first place? The answer lies within the history of their family business: $4.
Here's a look at how the brothers became billionaires in the first place.