Cargill may be private, but it's highly visible. The agribusiness giant, the largest private corporation in the US, has operations in 67 countries. It has four business units -- Agriculture Nutrition & Protein (customized farm services and products); Food Ingredients and Applications (food and beverage ingredients, and meat and poultry products); Industrial; Origination and Processing (commodity origination, processing, marketing and distribution); and Industrial & Financial Services (physical products and risk management). Cargill's customers include food, beverage, industrial, pharmaceutical, and personal care product makers, as well as farmers and food service providers.