<div id="readability-page-1"><div><p><span>Henderson John Tannahill Director of Cytokinetics Inc [CYTK] filed a Form 4 on December 2, 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>12/2/25</span></td><td><span>Exercise(1)</span></td><td><span>8,750</span></td><td><span>$10.00</span></td><td><span>$87,500</span></td></tr><tr><td><span>12/2/25</span></td><td><span>Planned Sale(2)</span></td><td><span>8,750</span></td><td><span>$63.90</span></td><td><span>$559,125</span></td></tr></tbody></table></div><p><span>Ending Holdings: 74,661 (74,578 - Direct, 83 - Indirect)</span></p><div><table><tbody><tr><td><span>(1)</span></td><td><span>Exercised 9.8 years after vest date and 1.1 months before expiration date.</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>

CYTK

<p>Director John Tannahill Henderson of Cytokinetics Inc sold 8,750 shares for $559,125, as disclosed in a Form 4 filed with the SEC. The sale was part of a prearranged trading plan (10b5-1). Henderson's ending holdings are 74,661 shares. The Washington Service offers insider trading analysis and data services.</p>

Dir Henderson Sells 8,750 ($559.1K) Of Cytokinetics Inc [CYTK]