What is the biggest cereal company in the world?

Quaker Oats,

Breakfast cereals

• Cap'n Crunch
• Life cereal
• Quisp
• Mother's Natural Foods
• Quaker 100% Natural Granola
• Kretschmer Wheat Germ
• Muffets ("The round shredded wheat")
• Quaker Oatmeal Squares
• Quaker Toasted Oatmeal
• Quaker Oh's
• King Vitaman
• Quaker Corn Bran
• Quaker Oat Bran
• Quaker Puffed Rice
• Quaker Puffed Wheat

• Quaker Oatmeal
• Quaker Oatmeal To Go (re-branded from Breakfast Squares in 2006)
• Quaker Grits
• Aunt Jemima Syrups and Mixes (Aunt Jemima frozen breakfast foods is owned by Pinnacle Foods, who use the Aunt Jemima trademark under license from Quaker Oats Company)
• Quaker Breakfast Cookies
• Quaker Instant Oatmeal

• Quaker Crispy Minis (Rice Chips and Rice Cakes) (known as Snack-a-Jacks in the UK)
• Quakes Rice Snacks
• Quaker Soy Crisps
• Quaker Snack Bars
• Chewy Granola Bars
• Quaker Mini Delights

• Quaker Tortilla Mix
• Rice-A-Roni
• Pasta Roni
• Near East

• Milk Chillers
• Gatorade