Don’t underestimate kitchen and bathroom fixtures. With $5.9 billion in sales, Kohler isn’t just a big seller. It is highly influential in determining how people’s homes look—and has been for 142 years, since founder John Kohler invented one of the first modern bathtubs. Its bathroom fixtures are used by U.S. construction firms more often than any other brand. (Take a look at the sink next time you’re in a hotel.) Growing affluence in China has extended Kohler’s reach; it is now Kohler’s second-largest market, after the U.S. The company remains family owned.