Dan Wilks

Dan Wilks and his brother, Farris, sold their hydraulic fracturing and oilfield services company to the Singapore government in 2011 for $3.5 billion.In the years since, the brothers have been buying up land, adding 672,000 acres of property across 5 states.They first founded Wilks Masonry in 1995, following in their stone mason father's footsteps.In 2002 they launched into fracking with Frac Tech, building it into a large oil and natural gas outfit before selling the business nine years later.Since then, Dan and Farris have reinvested in oil and gas companies, including stakes in publicly traded firms such as Canada's Trican Well Services.