MAP20140023363 500 Largest U.S. corporations Sumario: Wal-Mart stayed on top as its sales cret closer to half-a-trillion dollars. Apple moved into the top five. And United Health Group continued its steady climb En: Fortune. - Amsterdam : Time Warner Publishing, 1999- = ISSN 0738-5587. - 16/06/2014 Volumen 169 Número 8 - 16 junio 2014 , p. F.1 - F.22 1. Ranking . 2. Empresas . 3. Corporaciones industriales . 4. Sectores económicos . 5. Estados Unidos .