No. 1: Sheldon Adelson, 79, owner of the Las Vegas Sands casino empire.
Total: $44.2 million No. 2: Harold Simmons, 81, owner of Contran Corp., a Dallas-based conglomerate worth an estimated $9 billion that specializes in metals and chemical production and waste management.
Total: $22 million No. 3:
Bob J. Perry, 80, head of a Houston real estate empire worth an estimated $650 million.
Total: $18.3 million No. 4: Robert Rowling, 58, head of Dallas-based TRT Holdings.
Total: $5.1 million
No. 5: William Koch, 72, an industrialist whose South Florida-based energy and mining conglomerate is worth an estimated $4 billion.