Bimbo is f-huge. Its all over the Americas. They own Mrs. Baird’s, Wonder, Orowheat and a number of others.
From the wikipedia: Bimbo brands

Barcel – Mexican brand producing potato chips and other confections, such as Duvalín
Bimbo – Producing cakes and bread. Bimbo breads and cakes are found in major United States cities with large Mexican and Mexican-American populations.
Cena – Chilean budget bread brand
Coronado – Cajeta and goat-milk caramel producer since 1932
El Globo – Fine Mexican pastry bakery founded in 1884. (Bought in 2005 from Grupo Carso)
Entenmann’s – Pastry baker in the United States
Ideal – Bimbo’s chilean bread brand. The Bimbo name is not used, but Ideal shares the same logo as Bimbo.
Lara – Producer of salted and sweet cookies
Marinela – Producer of Mexican cookies founded around 1950. In Colombia the brand is known as Marisela
Milpa Real – Producer of corn and flour tortillas, as well as tostadas in different variations.
Mrs. Baird’s – A leading bakery primarily present in Texas and surrounding states.
Oroweat – Producer of loaf bread primarily sold throughout the United States.
Plus Vita – Producer of bread and cakes in Brazil
Pullman – Producer of bread and cakes in Brazil
Ricolino – Producer of confectionary, candy and chocolates, with plants in Mexico and Europe
Suandy – Producer of bread and pastry
Swandy – Producer of butter cookies
Tía Rosa – Producer of home-style bread, pastry and tortillas
Wonder – Bread producer. In Mexico Wonder also markets flour tortillas.