Highest market cap in billions among #stocks $SPX $SPY 1.  APPLE INC. $AAPL: 1486.63 2.  MICROSOFT CORPORATIO. $MSFT: 1432.82 3.   INC. $AMZN: 1283.19 4.  ALPHABET INC. $GOOGL: 969.91 5.  FACEBOOK, INC. $FB: 662.42 United States United States United States United States United States