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Overview of the Class Action against Avantor, Inc.

On November 7, 2025, Robbins LLP announced a class action lawsuit against Avantor, Inc. (NYSE: AVTR) that concerns allegations of misrepresentation regarding the company's market performance. The lawsuit covers individuals who acquired Avantor’s common stock during the period from March 5, 2024, to October 28, 2025. This case highlights a significant financial downturn for Avantor, revealing that important information regarding the company's competitive position was not disclosed to investors.

Background Information

Avantor, Inc., a leading provider of scientific products and services, primarily operates in industries such as biotechnology, pharmaceuticals, and healthcare. Investors who purchased Avantor shares were led to believe that the company's financial health and competitive advantages were robust. However, the reality proved to be starkly different when the company reported unexpected losses, citing increased competition as a key factor behind its dwindling margins.

Allegations Highlighted in the Lawsuit

Robbins LLP has uncovered serious allegations against Avantor, which asserted that the company failed to adequately warn stakeholders of its vulnerable market condition. Among the allegations outlined in the lawsuit are:

• - Avantor’s competitive positioning was less favorable than portrayed.
• - The negative impacts of heightened competition were not publicly acknowledged.
• - The misleading statements concerning the company significantly influenced its stock prices.

The lawsuit also mentions that on October 29, 2025, Avantor reported disappointing third-quarter financial results, revealing a staggering net loss of $712 million, including a non-cash goodwill impairment charge of $785 million. The revelation of the impairment was attributed to "competitive pressures" that adversely affected Avantor’s profit margins. Following this announcement, Avantor's stock price dropped by over 23%, highlighting the drastic reaction from the investor community.

What This Means for Stockholders

Robbins LLP is urging stockholders who have suffered large financial losses to consider participating in this class action lawsuit. Any stockholder wishing to serve as a lead plaintiff must submit the appropriate documentation by December 29, 2025. Serving as a lead plaintiff entails acting on behalf of the other class members to direct litigation, but even those who do not take action can remain part of the class. This class action provides an opportunity for loss recovery without any upfront costs, as representation fees are contingent on the lawsuit's outcome.

Next Steps for Investors

Shareholders concerned about their investments in Avantor are encouraged to reach out for more information. To get in touch, stakeholders can fill out a contact form, email attorney Aaron Dumas, Jr., or call Robbins LLP directly at (800) 350-6003. For those interested in staying updated about any developments regarding the case, signing up for alerts is advisable.

About Robbins LLP

Robbins LLP has been a pioneer in shareholder rights litigation, helping investors recover losses and promoting corporate accountability since 2002. The firm is committed to ensuring that executives are held accountable for any wrongdoing. As part of their commitment, Robbins LLP provides free notifications when corporate executives engage in misconduct, empowering investors to take action when necessary.

This class action lawsuit against Avantor, Inc. not only stands as a reminder of the persisting issues within the corporate governance framework but also reinforces the necessity for transparency in financial reporting. Investors are encouraged to stay informed and engaged with both the legal process and their financial decisions.