Avantor Securities Suits Intensify as Firms Press Dec. 29 Lead-Plaintiff Deadline

Investor firms urge affected shareholders to seek lead-plaintiff status before December 29 following earnings disclosures tied to rising competition.

Overview

Multiple notices from The Gross Law Firm, The Law Offices of Frank R. Cruz, Glancy Prongay & Murray, and Levi & Korsinsky highlight a putative class period of March 5, 2024 through October 28, 2025.
The complaints allege Avantor understated competitive pressures and their impact on its business, rendering prior statements about its positioning and prospects misleading.
On April 25, 2025, Avantor missed estimates, cut 2025 guidance citing increased competitive intensity, and announced its CEO would step down, prompting a 16.6% share decline.
On August 1, 2025, the company again missed expectations and reduced guidance, with shares falling 15.5% on the update.
On October 29, 2025, Avantor reported -5% organic revenue growth, a $712 million net loss driven by a $785 million goodwill impairment tied in part to competitive pressures and lost large accounts, sending shares down 23.2%.