Top hedge funds dumped key tech stock in the second quarter with mixed results, as investors weigh what stocks the "smart money" bought and sold. David Einhorn's Greenlight Capital sliced its Apple (AAPL), Twitter (TWTR) and Micron Technology (MU) stake, while Dan Loeb's Third Point cut Facebook (FB) and exited its Alphabet (GOOGL) stake. Filings from other notable hedge funds including David Tepper's Appaloosa Management are awaited, as well as Warren Buffett's Berkshire Hathaway (BRKB). But hedge funds' disclosures come 45 days after the end of each quarter and may not reflect current positions.