Richtech Robotics Inc., the developer behind the AI-powered bartender, barista, and beverage robot ADAM, is now facing a proposed class action lawsuit claiming the company misled investors about its collaboration with Microsoft. The suit asserts that the company exaggerated the scope of its involvement with the tech giant, artificially boosting its stock price before closing a major private placement deal.

The complaint, filed Monday in the U.S. District Court for the District of Nevada, alleges that Richtech overstated its relationship with Microsoft’s AI Co-Innovation Labs. The labs reportedly offered only a brief, week-long development sprint, contrary to Richtech’s claims of a joint engineering project. Investors were left with the impression of a broader, commercial collaboration that did not exist.

Investor Claims and Timeline

Investor Luis Gonzalez Diez, who filed the complaint, seeks to represent a class of shareholders impacted during the proposed period beginning January 27, 2026. On that morning, Richtech issued a press release announcing a partnership with Microsoft to enhance the ADAM robot, a device capable of making cocktails, coffee, and bubble tea.

Following the announcement, Richtech shares surged nearly 45%, closing at $5.51 on January 27. The next day, the company disclosed a $38.7 million private placement agreement, issuing 8.5 million new shares to an institutional investor. Richtech expected to close the deal on January 29, and the company later confirmed the transaction was completed as planned.

The lawsuit claims these events misled investors about the company’s financial stability and growth prospects. Gonzalez Diez asserts that the press release suggested a significant collaborative and commercial relationship with Microsoft that did not exist. According to the complaint, Microsoft described its program as a “standard customer offering with no commercial element.”

Once media coverage clarified the nature of the Microsoft collaboration, Richtech shares fell sharply from over $5 to below $3.60 within two trading days, representing a substantial market impact.

Financial and Regulatory Concerns

The lawsuit also highlights issues regarding Richtech’s regulatory filings. The company reportedly failed to submit its annual report by a January deadline, raising questions about its eligibility to use Form S-3 at-the-market offerings. If accurate, Richtech would be barred from similar fundraising activities until January 2027, limiting its options for raising public capital.

Richtech’s annual report, cited in the complaint, shows the company generated just over $5 million in revenue in 2025 but reported a net loss exceeding $15.75 million. The figures suggest the company relies on substantial funding to maintain operations, reinforcing investor concerns about the timing and messaging of its Microsoft-related announcements.

Legal Proceedings and Defendants

Alongside Richtech Robotics Inc., the lawsuit names CEO Wayne Huang and Chief Financial Officer Michael Huang as defendants. Gonzalez Diez is represented by Phillip Kim and Laurence M. Rosen of the Rosen Law Firm PA, along with Patrick R. Leverty of Leverty & Associates Chtd.

At the time of filing, representatives for the defendants had not responded to requests for comment.

The case, Diez v. Richtech Robotics Inc. et al., Case No. 2:26-cv-00231, is currently pending in the Nevada federal court system.