Avantor Faces Shareholder Class Action Over Competition Disclosures as Lead-Plaintiff Deadline Nears

Investors have until December 29 to seek appointment to lead the case alleging the company downplayed competitive pressures.

Overview

The lawsuit covers purchasers of Avantor stock from March 5, 2024 through October 28, 2025, according to multiple law firm notices.
Plaintiffs allege Avantor overstated its competitive position and failed to disclose mounting competition that was hurting results.
On October 29, 2025, Avantor reported -5% organic revenue growth, a $712 million net loss and a $785 million goodwill impairment, prompting a one-day share drop of more than 23%.
Earlier 2025 disclosures on April 25 and August 1 cut guidance, cited increased competitive intensity and triggered stock declines of about 16.5% and 15%, with the CEO’s departure announced in April.
Faruqi & Faruqi, Robbins LLP, Bernstein Liebhard, Levi & Korsinsky and the Law Offices of Howard G. Smith are soliciting investors, while Grabar Law is pursuing a separate fiduciary-duty probe for long-term shareholders seeking governance reforms.