[3] Weetabix for Canada and the United States is manufactured in Cobourg, Ontario, in both organic and conventional versions.

Weet-Bix was introduced in Australia by the company "Grain Products Limited" in the mid-1920s, with funding from businessman Arthur Shannon and marketing assistance from Osborne's New Zealand friend Malcolm Macfarlane.

Osborne and Macfarlane then went to South Africa where Arthur Shannon, the owner of Grain Products, funded another Weet-Bix factory.

[9] In British advertising in the 1980s, Weetabix anthropomorphized the biscuits, representing a group of "street-wise" young teens, beginning as "skinheads".

", based on the idea that someone who had eaten Weetabix would be filled with unbeatable strength and energy, causing those who oppose them to flee out of self-preservation.

This was used to humorous effect in a variety of adverts re-imagining the outcome of fairy tales and historic events.

The giant states: "Fee fi fo fum, I smell the blood of an Englishman", with Jack responding: "Fee fi fo fix, I’ve just had my Weetabix", resulting in the giant quickly leaving the room.

[11] Weetabix was the title sponsor of the Women's British Open golf tournament for two decades, from 1987 until 2006.

Previously, they were known as "Frutibix",[12] "Bananabix"[12] and "Chocobix" (depending upon the additions), later as "Minibix", then as "Weetabix Minis".