What company sells the most cereal a year?

It's difficult to pinpoint exactly which company sells the most cereal by weight or volume annually. Here's why:

* Private Label Brands: Many grocery stores have their own private label cereal brands, which are often cheaper and compete directly with major brands.

* Different Categories: The definition of "cereal" can be broad. Some companies focus on breakfast cereals, while others produce granola, oatmeal, or other breakfast items.

* Global vs. Domestic: Data is often collected at the national level, but global sales figures are harder to come by.

However, we can make some educated guesses:

* Kellogg's is likely a strong contender. They are a giant in the breakfast food industry and have a vast portfolio of popular brands (e.g., Frosted Flakes, Corn Flakes, Special K).

* General Mills is another major player, with brands like Cheerios, Cinnamon Toast Crunch, and Lucky Charms.

* Post Holdings also has a significant presence in the cereal market, with brands like Grape-Nuts, Honey Bunches of Oats, and Pebbles.

Ultimately, it's impossible to definitively say who sells the most cereal without access to internal sales figures from all major companies and private label brands.