New York
GP
For the 20th year in a row, Microsoft co-founder Bill Gates has been named the richest person in the United States, according to the Forbes annual list released on Monday.
Gates is worth $72 billion, with Microsoft accounting for only one-fifth of his overall wealth. It turns out most of his money comes from his other investments - notably his firm Cascade, which owns large shares in Deere & Co., the Canadian National Railway and Mexican Coke bottler Femsa.
While the US economy is still battling slow growth, Gates made an additional $9.8 billion in 2013 alone, according to Bloomberg's Billionaire Index. Warren Buffett, whose net worth is $58.5 billion, ranked number two on the Forbes list.