Retail Microsoft overtakes Amazon as second most valuable US company Updated : October 26, 2018 11:06 PM IST Apple Inc tops the list at over $1 trillion after crossing that threshold in September. Microsoft's market capitalization was Wall Street's highest in late 1998 through early 2000 before the dot-com bubble burst. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.