Each entry records what a company publishes about itself, on the date it was read. It is not a recommendation, a ranking or a check of anyone’s work, and no company paid to appear here. Where a company publishes a figure about its own size, that figure is quoted as self-reported and linked to the page it came from.
Ownership in this industry changes constantly — distributors merge, manufacturers get acquired, brands get renamed. Where an entry knows about a change, it says so. Before you rely on a detail, follow the link and check it at the source.