The Quaker Oats Company, known as Quaker, is an American food conglomerate based in Chicago. It has been owned by PepsiCo since 2001. At present, it is the world’s largest manufacturer of oat products which makes it the Number 1 Cereal Brand. Quaker Oatmeal is 100% natural with no preservatives. It is made from Mortlock Oats, the best oat variety.