Bill Gates is the richest person in America, according to Forbes.

Revealing its list of the 400 richest people in the nation on Monday, Forbes pegged former Microsoft co-founder Bill Gates with a treasure chest of $81 billion. Gates actually added $9 billion to his net worth over the past year, partly due to a rise in his Microsoft shares as well as growth in other investments.

But Forbes lauded the man mostly for its charitable contributions.

The Bill & Melinda Gates Foundation has given away $30 billion since 2000, Forbes said, saying that the foundation helped played a role in eliminating smallpox, reducing polio, and overhauling the American educational system.