Not really a big secret, but this article notes that 15% of all printers sold by Lexmark are sold to Dell. Lexmark manufacturers the printers, sells them to Dell and then Dell brands them with their name. Last year, Lexmark sold $782 million worth of printers to Dell, up from $570 million the year before. The article says:

Lexmark has been criticized by analysts who say the company’s relationship with Dell, which has rapidly gained printer market share, dilutes its own brand name.

While that may be true, it’s hard to argue with hundreds of millions of dollars of sales. Besides, most people probably don’t even know that their Dell printer isn’t made by Dell, so the Lexmark name probably isn’t being diluted in too many people’s eyes.

Lexmark selling more printers to Dell [Kentucky.com]