Investors Advised to Act as Avantor Faces Class Action Deadline
New York, Tuesday, 11 November 2025.
Rosen Law Firm urges Avantor investors to seek legal counsel by December 29, 2025, due to a class action lawsuit alleging misrepresentation of competitive positioning, impacting stock performance.
Overview of the Legal Challenge
On November 11, 2025, Rosen Law Firm, a prominent global investor rights law firm, announced that investors in Avantor, Inc. (NYSE: AVTR) should urgently seek legal counsel before the approaching December 29, 2025 deadline. This is in relation to a securities class action lawsuit that accuses Avantor of misrepresenting its competitive position, which has allegedly led to significant investor losses [1].
Allegations Against Avantor
The lawsuit, filed on behalf of investors who acquired Avantor stock between March 5, 2024, and October 28, 2025, claims that the company provided false and misleading information about its business operations and prospects. Specifically, the allegations suggest that Avantor overstated its competitive strength and failed to disclose the negative impacts of increased competition [2][3].
Impact on Stock Performance
Avantor’s financial disclosures throughout 2025 have reflected the challenges posed by the competitive landscape. For instance, on April 25, 2025, the company reported weaker-than-expected sales, leading to a stock price drop of over 16% -16.581. Further disappointing results were reported on August 1, 2025, and October 29, 2025, with stock price declines of more than 15% and 23%, respectively -15.097, -23.056 [3][4].
Next Steps for Investors
Investors are encouraged to consider joining the class action to seek compensation for their losses. The deadline to request the court to appoint a lead plaintiff is December 29, 2025. Participation in the lawsuit does not require serving as a lead plaintiff, and investors can join without incurring out-of-pocket costs [1][2].