SHAREHOLDER ACTION REMINDER: Faruqi & Faruqi, LLP Announces that Avantor Investors Have Opportunity to Lead Class Action Lawsuit

Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Avantor To Contact Him Directly To Discuss Their Options

If you purchased or acquired securities in Avantor between March 5, 2024 and October 28, 2025 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).

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New York, New York--(Newsfile Corp. - December 13, 2025) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Avantor, Inc. ("Avantor" or the "Company") (NYSE: AVTR) and reminds investors of the December 29, 2025 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.

Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.

As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose that: (1) Avantor's competitive positioning was weaker than Defendants had publicly represented; (2) Avantor was experiencing negative effects from increased competition; and (3) as a result, Defendants' representations about the Company's business, operations, and prospects were materially false and misleading and/or lacked a reasonable basis.

During the Class Period, Defendants misled investors by falsely touting the Company's competitive positioning and downplaying the effects of increased competition. For example, during an earnings call on July 26, 2024, in response to an analyst's question about whether Avantor was losing share to a competitor, Defendant Michael Stubblefield, then the Company's President and Chief Executive Officer, assured investors that Avantor's "lab business stacks up well against every number that certainly that we've seen," that "we continue to enhance our position," and that "we're really confident in our value proposition and our competitive position." Likewise, Defendants repeatedly pointed to Avantor's purported competitive advantages, such as its digital capabilities, as evidence that the Company would continue to enjoy strong competitive positioning.