The biggest lease holder in Canada’s oil sands isn’t Exxon Mobil or Chevron. It’s the Koch brothers

You might expect the biggest lease owner in Canada's oil sands, or tar sands, to be one of the international oil giants, like Exxon Mobil or Royal Dutch Shell. But that isn't the case. The biggest lease holder in the northern Alberta oil sands is a subsidiary of Koch Industries, the privately-owned cornerstone of the fortune of conservative Koch brothers Charles and David.