A securities class action lawsuit has been filed against Avantor Inc., a global supplier of scientific products and services, on behalf of investors who purchased the company's common stock between March 5, 2024, and October 28, 2025. The suit alleges that Avantor and its executives made false or misleading statements regarding the company's competitive positioning, failing to disclose that Avantor was experiencing negative impacts from increased competition. The market began to uncover these issues following disappointing financial results reported in April and August 2025, which included lower-than-expected sales and reduced revenue projections attributed to heightened competitive pressures. These disclosures led to significant declines in Avantor's share price. Investors seeking to serve as lead plaintiff in the case must file their motions by December 29, 2025.