Yeah, I did look, most of them I’ve never seen before. Its a big list, but it covers a worldwide range of companies - most of them are specific to only a handful of countries. For dog food I can choose Harrington’s, Pedigree, Butcher’s etc, for sweets there’s Mars, Haribo, Barratt etc - I really get the impression that you’re thinking of the Big 11 companies, which are almost impossible to wholly boycott.
White brands are a different case, but I don’t even bother with off-brands of stuff Nestle makes, so I’m pretty sure I’m safe.