<div id="readability-page-1"><div><p><span>Lee Chan W Chief Operating Officer of Ambarella Inc [AMBA] filed a Form 4 on December 19, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:</span></p><div><table><tbody><tr><td><span>Date</span></td><td><span>12/17/25</span></td></tr><tr><td><span>Transaction</span></td><td><span>Surrender(1)</span></td></tr><tr><td><span>Shares</span></td><td><span>2,406</span></td></tr><tr><td><span>Price</span></td><td><span>$71.82</span></td></tr><tr><td><span>Value</span></td><td><span>$172,799</span></td></tr></tbody></table></div><p><span>Ending Holdings: 124,566 - Direct</span></p><ul><li><span>(1)</span></li><li><span>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</span></li></ul><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>

AMBA

<p>Lee Chan W, COO of Ambarella Inc, surrendered 2,406 shares at $71.82 each, valued at $172,799, to cover option exercise costs and/or tax liabilities. His remaining direct holdings are 124,566 shares.</p>

COO Lee Surrenders 2,406 Of Ambarella Inc [AMBA]