Shareholders have taken legal action against Microsoft, alleging the technology giant misled investors by concealing details about slowing expansion in its Azure cloud division and substantial capital outlays required for artificial intelligence infrastructure. The proposed class action, initiated by the City of St. Clair Shores Police and Fire Retirement System, was lodged in Seattle federal court on Friday following a significant market reaction to the company's earnings announcement.
Microsoft's shares dropped 10% on January 29 after the company released its quarterly results the previous day, erasing approximately $357 billion in market capitalisation. This marked the steepest single-day sell-off for the Redmond, Washington-based firm in nearly six years. The company has not yet issued a public response to the legal challenge.
During the second quarter ending in December, Microsoft disclosed that Azure and associated cloud services grew revenue by 39%, matching analyst projections but falling short of the 40% expansion recorded in the preceding quarter. Management further signalled that growth would moderate to between 37% and 38% during the opening months of 2026. In parallel, capital expenditures surged to $37.5 billion during the same period, representing a near 66% jump year-on-year and surpassing the $34.3 billion that market analysts had anticipated.
According to the complaint, Microsoft attributed the deceleration in Azure performance and rising spending requirements to capacity constraints resulting from redirecting resources toward artificial intelligence research initiatives and development of its Copilot assistant. The lawsuit identifies Chief Executive Satya Nadella and Chief Financial Officer Amy Hood among the defendants named in the action. Microsoft maintains a significant stake in OpenAI, the creator of ChatGPT, putting it in direct competition with alternatives such as Google's Gemini.
The legal action covers the period from May 1, 2025 through January 28, 2026. Securities litigation following unexpected stock price declines has become routine in corporate America, as shareholders routinely pursue fraud allegations when companies' public disclosures diverge substantially from market performance.
