<div id="readability-page-1"><div><p><span>Vattuone Steven Chief Financial 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><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>12/1/25-12/2/25</span></td><td><span>Planned Surrender(1)(2)</span></td><td><span>26,264</span></td><td><span>$5.68</span></td><td><span>$149,161</span></td></tr><tr><td><span>12/3/25</span></td><td><span>Planned Sale(2)</span></td><td><span>9,453</span></td><td><span>$5.83</span></td><td><span>$55,105</span></td></tr></tbody></table></div><p><span>Ending Holdings: 539,664 - 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>ON24 Inc's CFO, Steven Vattuone, sold 9,453 shares worth $55,105 as part of a prearranged trading plan. The transaction was disclosed in a Form 4 filed with the SEC on December 3, 2025. Vattuone's ending holdings are 539,664 shares. The sale was executed to cover option exercise costs and tax liabilities.</p>

CFO Vattuone Sells 9,453 ($55.1K) Of ON24 Inc [ONTF]