Key Takeaways:
- Microsoft was sued by shareholders over alleged concealment of AI spending
- The class action covers MSFT investors from May 2025 to January 2026
- A $357 billion single-day market value wipeout followed the Q2 earnings report
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Microsoft faces shareholder lawsuit over $357B wipeout tied to AI costs
Microsoft Corp. was sued by shareholders who said the company concealed AI-related spending that erased $357 billion in market value.
"The lawsuit, led by the City of St. Clair Shores Police and Fire Retirement System in Michigan, alleges Microsoft made false and misleading statements about its Copilot AI products and cloud business," the Schall Law Firm said in a statement.
The proposed class action covers investors who bought MSFT securities between May 1, 2025 and Jan. 28, 2026. Microsoft shares fell 10% on Jan. 29 after the company reported Azure cloud revenue growth of 39% in its fiscal second quarter, down from 40% in the prior period and below internal targets. Capital spending reached $37.5 billion, up nearly 66% from a year earlier and exceeding analyst estimates of $34.3 billion.
The complaint alleges Microsoft's Copilot AI products suffered from poor user experience and capacity constraints, while the company's AI model ranked poorly against competitors on industry benchmarks. Microsoft was unable to convert a large percentage of Microsoft 365 users to paid Copilot subscriptions, losing market share to rivals, according to the filing. Investors have until Aug. 11, 2026 to seek lead plaintiff status.
The lawsuit names Chief Executive Satya Nadella and Chief Financial Officer Amy Hood as defendants, along with Microsoft. The company diverted hardware away from profitable business units to improve its competitive position in artificial intelligence, the complaint alleges.
The $357 billion single-day market value wipeout was Microsoft's largest in nearly six years. The stock traded at $390.74 as of the most recent close.
The lawsuit introduces legal and reputational risk for Microsoft at a time when the company is investing heavily in AI infrastructure. Investors will watch for the company's fiscal third-quarter results and any updates on Azure growth trajectory.
This article is for informational purposes only and does not constitute investment advice.
[1] Investor Notice: Robbins LLP Informs Investors of the Microsoft Corporation Class Action Lawsuit[2] MSFT Investors Have Opportunity to Lead Microsoft Corporation Securities Fraud Lawsuit with the Schall Law Firm - Business Wire[3] MSFT Investors Have Opportunity to Lead Microsoft Corporation Securities Fraud Lawsuit with the Schall Law Firm - FinancialContent[4] MSFT Investors Have Opportunity to Lead Microsoft Corporation Securities Fraud Lawsuit with the Schall Law Firm - Carroll County Mirror-Democrat[5] Microsoft sued by shareholders over expenses, cloud business, AI - Reuters
