Mexican conglomerate Alfa is a big player in four different industry segments. Alpek, a global petrochemical concern with an emphasis on synthetic fibers (Akra Polyester, DAK Americas, Nyltek, Indelpro, PTAL, Temex) accounts for about 40% of sales. Alfa's other operations consist primarily of refrigerated-foods manufacturer and distributor Sigma Alimentos (Yoplait yogurt, Oscar Mayer), aluminum auto part maker Nemak (engine heads and blocks), and telecom company Alestra. Alfa has alliances with more than 20 companies (such as AT&T, Ford, and Kraft) around the world. It operates more than 75 production facilities throughout the Americas, Asia, and Europe, though Mexico provides almost half of its sales.