Lsb Industries, Inc.
A maker of nitrogen-based chemicals, LSB Industries runs chemical plants that produce ammonia, UAN fertilizer, and nitric acid used by farmers for crops and by miners for explosives. The company began in 1968 as a holding company built around the L&S Bearing Company, an Oklahoma City parts maker that Jack Golsen acquired; its "LSB" name is just those initials. A fun quirk: this fertilizer and chemicals firm got its start rebuilding ball bearings in short supply after World War II.