When the smart money agrees on where to concentrate its money, retail investors should take notice. : Recently, personal finance website WalletHub examined the most recent SEC disclosures filed by more than 400 hedge funds and billionaires. Among its findings was that out of the thousands of stocks in the market, only a handful appear near the top of more than one of their portfolios. Below, let's consider the three top stocks that five billionaires bought, and made some of their biggest holdings.