<div id="readability-page-1"><div><p><span>Blackie James Officer of ON24 Inc [ONTF] 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><td><span>Date</span></td><td><span>12/1/25-12/2/25</span></td></tr><tr><td><span>Transaction</span></td><td><span>Planned Surrender(1)(2)</span></td></tr><tr><td><span>Shares</span></td><td><span>22,550</span></td></tr><tr><td><span>Price</span></td><td><span>$5.68</span></td></tr><tr><td><span>Value</span></td><td><span>$128,068</span></td></tr></tbody></table></div><p><span>Ending Holdings: 478,861 - Direct</span></p><div><table><tbody><tr><td><span>(1)</span></td><td><span>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</span></td></tr><tr><td><span>(2)</span></td><td><span>Executed pursuant to a prearranged trading plan (10b5-1).</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>

ONTF

<p>Blackie James, an officer of ON24 Inc, surrendered 22,550 shares back to the company to cover option exercise costs and tax liabilities. The transaction was executed under a prearranged trading plan (10b5-1) at a price of $5.68 per share, totaling $128,068. His ending holdings are 478,861 shares directly.</p>

Officer Blackie Surrenders 22,550 Of ON24 Inc [ONTF]