What is the Duolingo securities class action lawsuit about?

The Duolingo securities class action lawsuit alleges that Duolingo, Inc. and certain defendants made false and/or misleading statements to investors during the Class Period. Specifically, the lawsuit alleges that defendants concealed how aggressive monetization tactics and lower-quality AI-generated content were negatively impacting user growth and the overall product experience.

What is the class period for the Duolingo securities lawsuit?

The Class Period for the Duolingo securities class action runs from May 2, 2025 through February 26, 2026. Investors who purchased Duolingo (NASDAQ: DUOL) shares during this window may potentially be eligible to participate in the lawsuit.

What did Duolingo allegedly hide from investors about its Daily Active Users?

The lawsuit alleges that Duolingo was deliberately introducing user friction — including increased ad volume and subscription upsells — that defendants understood would cause users to leave the app and hurt Daily Active User (DAU) growth rates. The complaint further alleges that Duolingo's own internal A/B testing demonstrated these friction increases were already having negative impacts on DAU growth, information that was allegedly not disclosed to investors.

How does AI-generated content factor into the Duolingo class action?

The lawsuit alleges that Duolingo's rapidly generated AI content was worsening the quality of its product offerings and negatively impacting user experience and user trends. This allegedly threatened the sustainability of Duolingo's financial performance, though the company reportedly did not disclose these risks to investors.

What is the lead plaintiff deadline for the Duolingo securities lawsuit?

The deadline to apply to serve as lead plaintiff in the Duolingo class action is December 7, 2026. Investors who believe they suffered losses on Duolingo shares during the Class Period should be aware of this deadline if they wish to seek a leadership role in the case.

Where was the Duolingo investor lawsuit filed?

The Duolingo securities class action was filed in the United States District Court for the Western District of Pennsylvania. This is the court that will oversee the litigation going forward.

Did Duolingo's own internal testing allegedly show problems with its growth strategy?

Yes — the lawsuit alleges that Duolingo conducted rigorous A/B testing that revealed its monetization push and rapidly generated AI content were degrading the user experience and eroding the value proposition of its subscription tiers. Despite this, defendants allegedly continued to represent to investors that product improvements were driving sustained growth and strong user momentum.

Who can join the Duolingo class action lawsuit?

Investors who purchased or otherwise acquired Duolingo, Inc. (NASDAQ: DUOL) securities between May 2, 2025 and February 26, 2026 may potentially be eligible to participate in the class action. Those who suffered losses on their Duolingo investment during this period should consult with a securities attorney to understand their rights and options before the December 7, 2026 lead plaintiff deadline.

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Case Details

Ticker DUOL

Class Period 05/02/2025 - 02/26/2026

Lead Plaintiff Deadline 12/07/2026

Days Left to Seek Lead Plaintiff

If you are a Duolingo, Inc. investor who suffered a loss and would like to learn more, you can provide your information below:

Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Duolingo To Contact Him Directly To Discuss Their Options

If you purchased or acquired securities in Duolingo between May 2, 2025 and February 26, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).

Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Duolingo, Inc. (“Duolingo” or the “Company”) (NASDAQ: DUOL) and reminds investors of the December 7, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.

As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose that: The Duolingo class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose, among other things, that: (i) 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; (ii) 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; (iii) 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 (iv) 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.

Lead Plaintiff Deadline: December 7, 2026

Call Partner Josh Wilson at 877-247-4292 or 212-983-9330 (Ext. 1310). Or submit your information below to learn about your rights.

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