Ackman Boosts Amazon, Microsoft Stakes as AI Cloud Revenues Surge

On May 30, 2026, billionaire Bill Ackman disclosed large Q1 additions to Amazon and Microsoft, lifting both stocks' visibility amid accelerating AI and cloud growth. Amazon reported materially higher Q1 revenue of $181.5 billion (+17% YoY) with AWS at $37.6 billion (+28%), while Microsoft posted steadier $82.9 billion revenue (+18% YoY), cloud revenue of $54.5 billion (+29%), and AI run-rate of $37 billion (+123%). The comparison underscores Amazon's greater volatility and lower margins (~17%) versus Microsoft's consistent expansion and ~38% margins, positioning both as key AI plays for investors tracking whether the revenue gap narrows.