Robbins Geller Launches Class Action Lawsuit Against Duolingo, Inviting Investors with Losses to Step Forward

Robbins Geller Initiates Class Action Against Duolingo

The prestigious law firm Robbins Geller Rudman & Dowd LLP has officially launched a class action lawsuit against Duolingo, Inc. (NASDAQ: DUOL), a significant player in the mobile learning industry. This action comes in light of alarming developments regarding Duolingo's financial performance and market strategy, particularly affecting Class A common stock purchasers during the Class Period from May 2, 2025, to February 26, 2026.

Invitation for Class Members

Investors who incurred substantial financial losses during the defined period are urged to consider stepping forward and seeking appointment as lead plaintiffs in the class action. The deadline for this initiative is set for December 7, 2026. The case, filed under the caption City of Dearborn Heights Act 345 Police & Fire Retirement System v. Duolingo, Inc., suggests various legal violations against the company and key executives concerning securities regulations.

Robbins Geller is actively encouraging those affected to come forward, promising guidance through the process. Interested parties can find more information on the firm’s website and reach out to attorneys Ken Dolitsky or Michael Albert for further assistance.

Allegations Against Duolingo

The lawsuit comes in light of serious allegations against Duolingo, a well-regarded platform known for making language learning accessible through mobile applications. Specifically, the complaints point to misleading statements made by the company regarding user engagement and growth metrics. Key claims include:

1. Misleading User Metrics: The lawsuit alleges that throughout the Class Period, Duolingo's executives knowingly made false statements about Daily Active User (DAU) growth rates, linking them to increased user friction due to heightened ad volumes and lesser product quality.

2. A/B Testing Outcomes: There are assertions that Duolingo’s own rigorous A/B testing revealed adverse impacts on user engagement due to escalated friction within the app's free user experience.

3. Quality of Content: A serious point of concern is the decline in product quality driven by quickly generated AI content, which reportedly jeopardized user satisfaction and long-term growth sustainability.

4. False Growth Promises: Contrary to promises made about enhancing user retention and content quality, it seems that monetization strategies were in fact detracting from the product's appeal, leading to declining DAU numbers and a negative overall experience.

Financial Implications

The repercussions of these allegations became evident when Duolingo reported its third-quarter financial results on November 5, 2025. This report unveiled a worrying decline in DAU growth, showcasing a drop to 36% from 49% earlier in 2025. These results led to a staggering 25% fall in stock prices.

Further complications arose after the abrupt resignation of Duolingo’s Chief Financial Officer, Matthew Skaruppa, on January 12, 2026, and subsequent preliminary results indicating DAU growth requirement of merely 30%. Again reacting negatively, the stock fell by another 8.5% in response to these revelations.

Finally, on February 26, 2026, Duolingo's fourth-quarter financial results confirmed earlier trends with further deterioration of user engagement forecasts, impacting overall revenue projections for 2026. At this announcement, the stock price fell an additional 14%, emphasizing the urgent need for legal action.

About Robbins Geller

Robbins Geller Rudman & Dowd LLP is noted as a premier law firm with a strong track record in securities litigation. With a total recovery exceeding $8.4 billion for investors over the past five years and a notable $916 million in 2025 alone, they continue to lead the charge against violations that threaten shareholder interests. Their attorneys possess extensive expertise in prosecuting class actions, ensuring that victims of financial fraud receive just compensation.

For more detailed information on how to get involved in this case, visit Robbins Geller's website or contact their offices directly.

Conclusion

The developments surrounding Duolingo serve as a critical reminder of the importance of transparency and accountability in the ever-evolving tech landscape. Investors should remain vigilant and informed, especially when considering the potential repercussions of corporate strategies on financial performance.