Duolingo Sued for Allegedly Misleading Shareholders
A class action lawsuit claims Duolingo misled investors about ad revenue strategies and AI content quality, leading to significant stock declines.
San Diego, Calif. – October 12, 2026 – Shareholder rights law firm Robbins LLP has notified investors of an ongoing securities class action lawsuit against Duolingo, Inc. The complaint, filed on October 12, 2026, alleges that Duolingo misled investors regarding its business practices and financial condition between May 2, 2025, and February 26, 2026.
The lawsuit contends that Duolingo aggressively pushed monetization through increased advertising and user friction, while simultaneously relying on lower-quality, rapidly generated AI content. During this period, the company assured investors of sustainable growth, particularly in daily active users (DAU) and bookings.
Revelations began in the company's financial reports. In November 2025, Duolingo reported a significant slowdown in DAU growth, causing its stock to drop 25%. In January 2026, the resignation of its CFO and further decelerated DAU growth led to another stock decline. By February 2026, the company confirmed the growth slowdown and projected negative financial impacts for 2026, resulting in a third major stock drop.
Robbins LLP urges Duolingo shareholders who experienced substantial losses during the class period to contact the firm for details on the lawsuit and the December 7, 2026 deadline to seek lead plaintiff status. Representation is on a contingency fee basis, meaning no upfront costs for investors.