SAN DIEGO, CA — Robbins Geller Rudman & Dowd LLP has announced a new securities class action against Avantor, Inc. (NYSE: AVTR), alleging the company and several current and former executives misled investors about the strength of its competitive position and the impact of rising competition on its core businesses.
The lawsuit, filed in the Eastern District of Pennsylvania and led by the Building Trades Pension Fund of Western Pennsylvania, seeks to represent investors who purchased Avantor common stock during the class period and later suffered losses. Lead plaintiff motions must be filed by December 29, 2025.
According to the complaint, Avantor — a major supplier of mission-critical products and services to the biopharma, healthcare, education, government, and advanced materials sectors — repeatedly downplayed or failed to disclose weakening demand and intensifying competition across key business lines.
The allegations center on three major financial disclosures in 2025:
• April 25, 2025 — Avantor reported weak first-quarter organic sales in its Laboratory Solutions division and cut its full-year guidance. During the announcement, CFO R. Brent Jones acknowledged the “impact of increased competitive intensity” and declining volumes from several customers. The company also revealed that CEO Michael Stubblefield would step down upon appointment of a successor. Shares fell more than 16% following the news.
• August 1, 2025 — The company posted disappointing second-quarter results and further reduced its full-year outlook, again citing competitive pressures in Laboratory Solutions. Jones warned that the environment was not expected to “chang[e] materially” through year-end. Shares dropped another 15%.
• October 29, 2025 — Avantor reported third-quarter results showing a 5% decline in organic revenue growth both company-wide and within Laboratory Solutions — worse than the “careful” projections of −4% to −2% previously communicated. Shares fell more than 23%.
The lawsuit argues these disclosures revealed that earlier statements about growth expectations and competitive positioning lacked a reasonable basis, thereby misleading investors.
Under the Private Securities Litigation Reform Act, any investor who acquired Avantor shares during the class period may seek appointment as lead plaintiff. The selected lead plaintiff directs the litigation on behalf of the class but does not need to serve in that role to participate in any future recovery.
Robbins Geller — one of the world’s largest and best-known plaintiffs’ securities firms — is encouraging affected shareholders to contact the firm or submit information online. Robbins Geller has secured more monetary relief for investors than any other firm in recent years, including $2.5 billion recovered in securities-related cases in 2024 alone.
The firm notes that past results do not guarantee future outcomes but emphasizes its track record in high-stakes shareholder litigation, including the landmark $7.2 billion recovery in the Enron securities case.
Investors who believe they may have been impacted can seek additional information and submit lead plaintiff motions ahead of the December deadline.
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