Microsoft Securities Fraud Lawsuit: Investors Have Lead Plaintiff Deadline
Rosen Law Firm has notified purchasers of Microsoft stock of an upcoming deadline to serve as lead plaintiff in a securities fraud class action. The lawsuit alleges misleading statements regarding AI product performance.

Investors who purchased stock in Microsoft Corporation (NASDAQ: MSFT) between May 1, 2025, and January 28, 2026, have until August 11, 2026, to seek lead plaintiff status in a securities fraud class action lawsuit. Rosen Law Firm, which is pursuing the case, has alerted eligible investors of the impending deadline.
The lawsuit alleges that Microsoft made false and misleading statements regarding its Copilot family of artificial intelligence products. According to the complaint, the company failed to disclose significant issues with Copilot, including problems with brand positioning, user experience, usage, data siloing, and interoperability. It is also claimed that Microsoft's proprietary AI model ranked poorly compared to competitors on benchmark tests.
Furthermore, the suit contends that Microsoft needed to significantly increase capital expenditures and divert resources, such as graphics and central processing units, from its Azure services to bolster the Copilot products. The complaint asserts that these issues negatively impacted the conversion of commercial Microsoft 365 users to paid Copilot subscriptions and led to a loss of market share to rival products.
Rosen Law Firm states that investors who purchased Microsoft stock during the specified period may be entitled to compensation without out-of-pocket fees through a contingency fee arrangement. The firm is encouraging those interested in serving as lead plaintiff to contact them for more information. Until a class is certified, investors are not represented by counsel unless they retain their own.