Many companies split themselves up and the various bits are in completely different ownership, often the same product is owned by different companies in different parts of the world. A good example is Dunlop, with Dunlop branded tyres being made by different companies in different parts of the world, and of course nothing to do with other Dunlop branded goods like sports equipment. Some people probably think that SAAB doesn't exist anymore, but SAAB the aerospace manufacturer is very much alive, they just sold the car division decades ago and it has subsequently folded. Volvo, the company that makes trucks and much else, is nothing to do with Volvo Cars, which is Chinese owned. Then there's the "brands of convenience" type operation where one company operates several different brands aimed at different parts of the market, the classic example being Carnival Corporation which runs several differently branded cruise lines including Cunard and P & O Cruises, but remember that P & O Cruises is nothing to do with the P & O company which operates ferries!