A Bill Gates business card obtained on Nov. 6, 1980, during a visit to the Microsoft co-founder's Bellevue, Wash., office.

Microsoft looks poised to open Thursday with a market valuation above $4 trillion, after reporting strong earnings boosted by ...

Microsoft could join the $4 trillion club tomorrow if the current stock action carries through, according to Dow Jones Market Data. Shares recently changed hands above $549 in Wednesday's after-hours ...

Microsoft has become the second publicly traded company ever to cross the $4 trillion market capitalization mark. Chip giant ...

Microsoft will become the second company to close with a $4 trillion market cap club, joining Nvidia, if its stock gains hold ...

Microsoft isn't slowing down. The world's second-largest company by market cap reported blockbuster fourth-quarter earnings, sending shares surging so high after hours that the tech giant became a ...