Form 4 Filing for Luis von Ahn

Luis von Ahn, President & CEO, Co-Founder of Duolingo, Inc. (DUOL), reported several transactions on September 21-22, 2026. These include the acquisition of 27,960 shares of Class A Common Stock for $14.42 each and 9,406 shares for $38.08 each. Concurrently, von Ahn disposed of 33,257 shares at a weighted average price of $150.4641 and 4,109 shares at $151.0699. On September 22, 2026, he acquired an additional 3,614 shares for $38.08 each and disposed of 200 shares at $150.00 and 3,414 shares at $152.02 each. The filing also details the exercise of stock options and the subsequent conversion and disposal of Class B Common Stock into Class A Common Stock. These transactions were conducted under a Rule 10b5-1 trading plan.