It's got a pretty hands-off name, but United Technologies (Fortune 500) is a manufacturer with many arms, and it oversees some of the U.S.'s most prominent brands. Sure, , Boeing (Fortune 500) and Airbus make the news when they win or lose bids, but United Technologies owns Pratt & Whitney, the company that powers many of the planes those companies produce. And, of course, we all know Otis, the iconic elevator brand, which is a United Technologies company too. Manufacturer Sikorsky is another part of United Technologies' profile. And while Sikorsky may not ring a bell, it made the famous Black Hawk helicopters for the U.S. military. ,
Even less sexy but more pervasive, perhaps, is United Technologies bread and butter -- its climate, controls and security unit. The division made up the largest portion of the company's net sales in 2012 -- $17.1 billion out of $57.7 billion total.
Wal-Mart retook the top spot, Berkshire Hathaway made the top five, and Apple grew enormously.