There's no official leaderboard for AI spending in Big Tech, but companies are competing like there is one. Tech giants' intent to pour billions of dollars into their AI bets remains unwavering. Microsoft jumped ahead this time, announcing plans to spend $190 billion in capital expenditures this year . With four companies and more than $12 trillion in market cap reporting in one day, there's a lot to unpack. Amazon : AWS enjoyed its best growth since 2022, with sales jumping 28% last quarter.