Michigan pension fund sues Microsoft over hidden AI costs and slowing Azure growth

Microsoft is facing a securities class action lawsuit filed by a Michigan pension fund alleging the company misled investors about slowing Azure cloud growth, rising AI infrastructure costs, and the underperformance of its Copilot products. The lawsuit, which names CEO Satya Nadella and CFO Amy Hood as defendants, claims Microsoft painted an overly optimistic picture of its AI strategy while concealing the massive capital expenditures required, including a 66% year-over-year spike in quarterly spending, and the reallocation of critical computing resources from core cloud services to AI projects. This legal challenge stems from a January 2026 earnings announcement that triggered a 10% plunge in Microsoft shares and wiped out $357 billion in market value, highlighting a significant disconnect between the company's aggressive AI narrative and its financial disclosures. Microsoft has rejected the allegations as baseless, stating its public communications were accurate and that it will vigorously defend itself against the claims.