Philadelphia, Pennsylvania--(Newsfile Corp. - October 9, 2026) - Current Duolingo, Inc. shareholders who have held Duolingo shares since prior to May 2, 2025, are encouraged to contact Grabar Law Office to learn more about the investigation.

What is The Investigation About? Grabar Law Office is investigating claims on behalf of long-term shareholders of Duolingo, Inc. (NASDAQ: DUOL) concerning whether certain officers and directors of the Company breached fiduciary duties owed to Duolingo and its shareholders.

If you currently own Duolingo, Inc. (NASDAQ: DUOL) shares and have held those shares since prior to May 2, 2025, please visit https://grabarlaw.com/the-latest/duolingo-shareholder-investigation/, contact us at jgrabar@grabarlaw.com, or call 267-507-6085. you can seek corporate reforms, the return of funds spent defending litigation back to the company, and a court approved incentive award, at no cost to you whatsoever.

Why? As alleged in a federal securities fraud class action complaint, Duolingo, Inc.'s (NASDAQ: DUOL) growth strategy increasingly emphasized monetization through advertising, subscription-tier upselling and the use of rapidly generated artificial-intelligence content. In this context it is alleged that the company, through certain corporate officers made materially false or misleading statements and/or failed to disclose that: 1) Duolingo was deliberately increasing user "friction" through higher advertising volume and subscription upsells; 2) the Company's extensive A/B testing allegedly showed that such friction was negatively affecting daily active user, or DAU, growth; 3) rapidly generated AI content was allegedly degrading the quality of Duolingo's product offerings and user experience; and 4) the Company's monetization strategy and lower-quality AI-generated content were allegedly undermining the sustainability of Duolingo's growth and financial performance.

The complaint further alleges that, in April 2025, Duolingo introduced a new feature known as Energy, which replaced its prior Hearts system. According to the complaint, the Energy system was designed in part to create additional friction for free users and encourage them to convert to paid subscriptions, while Duolingo publicly characterized the feature as rewarding and beneficial to user engagement.

The complaint also alleges that Duolingo increasingly relied upon AI-generated content while representing to investors that its use of AI was improving the product and accelerating content creation. According to the complaint, users instead began reporting translation and pronunciation errors, repetitive lessons and other quality concerns associated with certain AI-powered features.

What Can Long-Term Duolingo Shareholders Do Now? If you currently own Duolingo, Inc. (NASDAQ: DUOL) shares and have held those shares since prior to May 2, 2025, you can seek corporate reforms, the return of funds spent defending litigation back to the company, and a court approved incentive award, at no cost to you whatsoever. If you would like to learn more about this matter, you are encouraged to visit https://grabarlaw.com/the-latest/duolingo-shareholder-investigation/, contact us at jgrabar@grabarlaw.com, or call 267-507-6085.

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Source: Grabar Law Office