<div id="readability-page-1"><div><p><span>von Ahn Luis Chairman of the Board of Duolingo Inc filed a Form 4 on December 3, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:</span></p><div><table><tbody><tr><th><span>Date</span></th><th><span>Transaction</span></th><th><span>Shares</span></th><th><span>Price</span></th><th><span>Value</span></th></tr><tr><td><span>12/1/25</span></td><td><span>Exercise(1)</span></td><td><span>120,000</span></td><td><span>$0.00</span></td><td><span>N/A</span></td></tr><tr><td><span>12/1/25</span></td><td><span>Surrender(2)</span></td><td><span>51,768</span></td><td><span>$185.45</span></td><td><span>$9,600,376</span></td></tr></tbody></table></div><p><span>Ending Holdings: 3,286,635 - Direct</span></p><div><table><tbody><tr><td><span>(1)</span></td><td><span>Exercised 5.6 years before expiration date.</span></td></tr><tr><td><span>(2)</span></td><td><span>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</span></td></tr></tbody></table></div><p><span>For a free trial, or to learn more about our insider trading analysis and data services, please visit http://www.washingtonservice.com or contact us at (301) 913-5100 or send an email to info@washingtonservice.com.</span></p><p><span>Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data.</span></p><span> </span></div></div>

DUOL

<p>Luis von Ahn, Chairman of Duolingo Inc, filed a Form 4 with the SEC on December 3, 2025, disclosing changes in ownership. He exercised 120,000 shares and surrendered 51,768 shares at $185.45 each to cover option exercise costs and tax liabilities. His ending holdings are 3,286,635 shares directly. This event highlights insider trading activities within the company.</p>

Chmn von Ahn Acquires 68,232 Of Duolingo Inc