SHAREHOLDER ALERT Bernstein Liebhard LLP Announces A Securities Fraud Class Action Lawsuit Has Been Filed Against Avantor, Inc. (NYSE: AVTR)

Core Points - A shareholder has filed a securities class action lawsuit on behalf of investors who purchased or acquired common stock of Avantor, Inc. between March 5, 2024 and October 28, 2025 [1] - The lawsuit alleges that the defendants made misrepresentations regarding the Company's competitive positioning [2] Legal Proceedings - Investors wishing to serve as lead plaintiff must file papers by December 29, 2025, and participation as a lead plaintiff is not required to share in any recovery [3] - All representation in the lawsuit is on a contingency fee basis, meaning shareholders will not incur fees or expenses [3] Firm Background - Bernstein Liebhard LLP has recovered over $3.5 billion for clients since 1993 and has represented large public and private pension funds [4] - The firm has been recognized multiple times for its success in litigating class actions, being named to The National Law Journal's "Plaintiffs' Hot List" thirteen times and listed in The Legal 500 for sixteen consecutive years [4]