94. Dennis Washington
Washington struck a $1.2 billion deal in July to buy Canada’s Dominion Diamond Corp. The industrialist already owns a copper and molybdenum mine in Montana and regional railroads in Montana and British Columbia, and he has a stake in Seaspan, which owns a fleet of roughly 90 container ships. His love of machinery dates back decades: After high school, Washington moved to Alaska, where he worked as a heavy-crane operator.