<div id="readability-page-1"><div><p><span>Zhou Rong, Vice President of Amphastar Pharmaceuticals Inc [AMPH], filed a Form 144 on November 28, 2025 with the Securities and Exchange Commission proposing to sell restricted securities:</span></p><div><table><tbody><tr><td><span>Approximate Date Of Sale</span></td><td><span>11/28/25</span></td></tr><tr><td><span>Shares</span></td><td><span>20,000</span></td></tr><tr><td><span>Broker</span></td><td><span>UBS Financial Services Inc</span></td></tr></tbody></table></div><p><span>Prior to the sale of restricted stock, owners must file a Form 144 with the SEC.  Upon submission of the filing to the SEC the owner is permitted to sell the shares, or any fraction thereof, within 90 days.</span></p><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>

AMPH

<p>Zhou Rong, VP of Amphastar Pharmaceuticals, filed a Form 144 with the SEC to sell 20,000 shares of restricted stock on November 28, 2025. The sale will be conducted through UBS Financial Services Inc. Form 144 is required for selling restricted securities, allowing sales within 90 days of filing. The Washington Service offers insider trading analysis and data services.</p>

VP Zhou Files To Sell 20,000 Of Amphastar Pharmaceuticals Inc [AMPH]