MSFT Breaking News: Microsoft Corporation Sued for Securities Fraud after Functionality Issues with Copilot Lead to 10% Stock Drop – Investors Notified to Contact BFA Law

A securities fraud class action lawsuit has been filed on behalf of Microsoft investors after its stock plummeted 10% because Microsoft allegedly misled investors regarding its AI chatbot Copilot and cloud computing platform Azure.

NEW YORK--(BUSINESS WIRE)--Leading securities law firm Bleichmar Fonti & Auld LLP announces that a class action lawsuit has been filed against Microsoft Corporation (NASDAQ:MSFT) and certain of the Company’s senior executives for securities fraud after its significant stock drop resulting from potential violations of the federal securities laws.

If you invested in Microsoft, you are encouraged to obtain additional information by visiting: https://www.bfalaw.com/cases/microsoft-class-action-lawsuit.

Key Details of the Microsoft ($MSFT) Class Action:

• Lead Plaintiff Deadline: August 11, 2026
• Alleged Misconduct: Securities fraud alleging that Microsoft misled investors regarding its Azure cloud computing platform and AI chatbot Copilot
• Stock Drop: January 28, 2026 – 10% Stock Drop
• Court: U.S. District Court for the Western District of Washington
• Action: Contact BFA Law to discuss your rights

Investors have until August 11, 2026 to ask the Court to be appointed to lead the case. The complaint asserts securities fraud claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 on behalf of investors in Microsoft common stock. The class action is pending in the U.S. District Court for the Western District of Washington. It is captioned City of St. Clair Shores Police and Fire Retirement System, et al., No. 26-cv-02071.

Why is Microsoft Being Sued for Securities Fraud?

Microsoft is a multinational technology company that develops software, cloud services, and devices. In recent years, Microsoft’s cloud computing platform named Azure has been Microsoft’s main growth driver. A key reason for Azure’s recent growth is Microsoft’s multi-billion-dollar investment into AI, including the development of its own generative AI chatbot named Copilot.

According to the complaint, during the relevant period, Microsoft consistently touted Copilot’s best-in-class capabilities, which purportedly drove widespread and growing user adoption. Copilot’s apparent success allowed Microsoft to report surging Azure-related revenue.

As alleged, in truth, Copilot suffered from severe functionality issues that caused user adoption to decline and put Microsoft’s Azure revenue at risk.

Why did Microsoft’s Stock Drop?

On January 28, 2026, Microsoft announced disappointing 2Q 2026 financial results and that Azure growth had slowed suddenly. Microsoft also allegedly revealed for the first time that the number of Microsoft 365 Copilot premium customers totaled only 15 million, materially below analyst estimates.

This news caused the price of Microsoft common stock to decline $48.13 per share, or 10%, from $481.63 per share on January 28, 2026, to $433.50 per share on January 29, 2026.

Additionally, on February 3, 2026, The Wall Street Journal reported in an article titled “Microsoft’s Pivotal AI Product Is Running Into Big Problems” that severe challenges and functionality issues had plagued Copilot, causing the application to lose market share. Specifically, The Wall Street Journal reported that “[c]onfusing brand positioning and interoperability problems have frustrated users.”

Click here for more information: https://www.bfalaw.com/cases/microsoft-class-action-lawsuit.

What Can You Do?

If you invested in Microsoft, you may have legal options and are encouraged to submit your information to the firm.

All representation is on a contingency fee basis; there is no cost to you. Shareholders are not responsible for any court costs or expenses of litigation. The firm will seek court approval for any potential fees and expenses.

Submit your information by visiting:

https://www.bfalaw.com/cases/microsoft-class-action-lawsuit

Or contact:
Adam McCall
[e-mail]
212.789.3619

Why Bleichmar Fonti & Auld LLP?

BFA is a leading international law firm representing plaintiffs in securities class actions and shareholder litigation. It has been named a top plaintiff law firm by Chambers USA, The Legal 500, and ISS SCAS, and its attorneys have been named “Elite Trial Lawyers” by the National Law Journal, “Litigation Stars” by Benchmark Litigation, among the top “500 Leading Plaintiff Financial Lawyers” by Lawdragon, “Titans of the Plaintiffs’ Bar” by Law360 and “SuperLawyers” by Thomson Reuters.

Most recently, The Legal 500 awarded BFA the most client satisfaction accolades of any plaintiff’s securities litigation law firm, with clients noting: “[t]here is no better service provider in the practice area,” “[t]he interest of the client is always front and center,” and “[t]here isn’t a better firm in this space.” One testimonial described the firm as “nimble and entrepreneurial,” with a “relentless focus on adding value for clients.”

Among its recent notable successes, BFA recovered over $900 million in value from Tesla, Inc.’s Board of Directors, as well as $420 million from Teva Pharmaceutical Ind. Ltd.

For more information about BFA and its attorneys, please visit https://www.bfalaw.com.

https://www.bfalaw.com/cases/microsoft-class-action-lawsuit

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