Weetabix Ltd., trading under the name Weetabix Food Company, is a food processing company that is responsible for the production of breakfast cereal brands, including Weetabix, Alpen, Crunchy Bran and Ready Brek. The company also produces Puffins cereal and Snackimals snacks through their Barbara's Bakery division.

The company holds a royal warrant from Queen Elizabeth II.

For the purpose of differentiating between the various countries, it was decided that the product, when introduced into the United Kingdom, should be known as "Weetabix". On 13 August 1936, with the approval of the Board of Trade, the Company name was changed to Weetabix Limited.