Rosen Law Firm, a global investor rights law firm, announces a class action lawsuit on behalf of purchasers of Class A common stock of Duolingo, Inc. (NASDAQ: DUOL) between May 2, 2025 and February 26, 2026, inclusive (the “Class Period”). Duolingo is a mobile learning platform that primarily focuses on language learning.
For more information, submit a form, email attorney Phillip Kim, or give us a call at 866-767-3653.
The Allegations: Rosen Law Firm is Investigating the Allegations that Duolingo, Inc. (NASDAQ: DUOL) Misled Investors Regarding its Business Operations.
According to the lawsuit, defendants made materially false and/or misleading statements and/or failed to disclose that: (1) Daily Active User (“DAU”) growth rates were being leveraged against deliberately added user friction in the form of significant increases in ad volume, subscription tier upsells, and worsened product quality, and defendants understood that any amount of user friction would cause users to leave the app and, ultimately, negatively impact DAU growth rates; (2) Duolingo’s rigorous A/B testing demonstrated to defendants that increased friction in the free user experience was having negative impacts on DAU growth rates; (3) Duolingo’s quickly generated AI content was worsening the quality of Duolingo’s product offerings, negatively impacting the user experience and user trends, and threatening the sustainability of Duolingo’s financial performance; and (4) far from driving sustained growth and strong user momentum through content and “product improvements” that “get improved retention,” Duolingo’s constant A/B testing informed Duolingo that its monetization push and lower-quality, rapidly generated AI content were degrading the Duolingo product experience and the value proposition of its subscription tiers. When the true details entered the market, the lawsuit claims that investors suffered damages.
What Now: You may be eligible to participate in the class action against Duolingo, Inc. Shareholders who want to serve as lead plaintiff for the class must file their motions with the court by December 7, 2026. A lead plaintiff is a representative party who acts on behalf of other class members in directing the litigation. You do not have to participate in the case to be eligible for a recovery. If you choose to take no action, you can remain an absent class member. For more information, click here.
All representation is on a contingency fee basis. Shareholders pay no fees or expenses.
About Rosen Law Firm: Some law firms issuing releases about this matter do not actually litigate securities class actions. Rosen Law Firm does. Rosen Law Firm is a recognized leader in shareholder rights litigation, dedicated to helping shareholders recover losses, improving corporate governance structures, and holding company executives accountable for their wrongdoing. Since its inception, Rosen Law Firm has obtained over $2 billion for shareholders.
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