Portnoy Law Firm Announces Class Action on Behalf of Avantor, Inc. Investors

Core Viewpoint - Avantor, Inc. is facing a class action lawsuit due to allegations of failing to disclose its weakened competitive position and the negative impact of increased competition during the class period from March 5, 2024, to October 8, 2025 [1][3]. Summary by Sections Class Action Details - The class action lawsuit is on behalf of investors who purchased Avantor securities during the specified class period [1]. - Investors have until December 29, 2025, to file a lead plaintiff motion [1][2]. Allegations Against Avantor - The lawsuit claims that Avantor did not disclose its weaker competitive positioning and the adverse effects of heightened competition [3]. - On April 25, 2025, Avantor reported weak first-quarter financial results, citing reduced volumes due to increased competitive intensity, leading to a share price drop of over 16% [4]. - On August 1, 2025, the company reported disappointing second-quarter results and lowered its full-year guidance, with a share price decline of more than 15% attributed to the same competitive pressures [5]. - On October 29, 2025, Avantor announced weak third-quarter results, including a 5% decrease in organic revenue growth, resulting in a share price drop of over 23% [6].