Introduction to the Avantor Class Action Lawsuit
- Avantor Class Action Lawsuit: The Avantor class action lawsuit – captioned Building Trades Pension Fund of Western Pennsylvania v. Avantor, Inc., No. 25-cv-06187 (E.D. Pa.) – seeks to represent purchasers or acquirers of Avantor, Inc. (NYSE: AVTR) common stock between March 5, 2024 and October 28, 2025, inclusive (the Class Period) and charges Avantor and certain of Avantor’s top current and former executives with violations of the Securities Exchange Act of 1934.
- Call Timothy L. Miles: If you suffered substantial losses and wish to serve as lead plaintiff of the Avantor class action lawsuit, or just have general questions about you rights as a shareholder, please contact attorney Timothy L. Miles of the Law Offices of Timothy L. Miles, at no cost, by calling 855/846-6529 or via e-mail at [email protected].
- Deadline to Lead: The deadline to apply to be Lead Plaintiff is December 29, 2025.
- Lead Plaintiff Process: Read on to learn everything you need to know about the lead plaintiff process in Avantor class action lawsuit.
The Allegations in the Avantor Class Action Lawsuit
Overview
- Avantor engages in the provision of mission-critical products and services to customers in the biopharma, healthcare, education and government, advanced technologies, and applied materials industries.
False and Misleading Statements
- The Avantor class action lawsuit further alleges that on April 25, 2025, Avantor announced its first quarter 2025 financial results, reporting weak organic sales in Laboratory Solutions and cut its guidance for 2025.
- Specifically, the company’s CFO, defendant R. Brent Jones, admitted that Avantor had “felt the impact of increased competitive intensity,” resulting in “reduced volumes at a handful of customers,” the complaint alleges.
- Avantor further announced, allegedly, that defendant Michael Stubblefield would be stepping down from his roles as President and Chief Executive Officer upon the appointment of a successor.
- On this news, the price of Avantor shares fell by more than 16%, the complaint alleges.
- The Avantor class action lawsuit further alleges that August 1, 2025, Avantor reported disappointing second quarter 2025 financial results and reduced the company’s full-year guidance, including its guidance for growth in Laboratory Solutions.
- CFO Jones attributed the weakening outlook for Avantor’s Laboratory Solutions business to “increased competitive intensity,” admitted that Avantor did not expect the competitive environment to “chang[e] materially” in the remainder of 2025, and projected that the weak Laboratory Solutions performance would persist, the complaint alleges.
- On this news, the price of Avantor shares fell by more than 15%, the complaint alleges.
Corrective Disclosure
- Finally, the Avantor class action lawsuit alleges that on October 29, 2025, Avantor reported weak financial results for the third quarter of 2025, including 5% decreases in organic revenue growth both overall and in Avantor’s Laboratory Solutions business – revealing that defendants’ recent assurances of “careful” third quarter projections of -4% to -2% growth were false.
- On this news, the price of Avantor shares fell by more than 23%, the complaint alleges.

The Private Securities Reform Act of 1995?
- Private Securities Litigation Reform Act (PSLRA) of 1995: Is a significant piece of legislation in the United States that was designed to curb frivolous or unwarranted securities lawsuits. This reform act was enacted to address the rampant abuse in securities class action litigation, which was seen as detrimental to businesses and the economy.
- Higher Pleading Standards: By establishing more stringent requirements for plaintiffs, the PSLRA aims to discourage baseless lawsuits while preserving investors’ rights to seek redress for legitimate grievances. One of the key provisions of the PSLRA includes the imposition of a higher standard for pleading securities fraud, requiring plaintiffs to specify each statement alleged to be misleading and the reasons why it is misleading. Additionally, it introduced the “safe harbor” provision for forward-looking statements, protecting companies from liability if they have made clear cautionary statements.

- Lead Plaintiff Selection: The PSLRA also changes how lead plaintiffs are selected in class action lawsuits. It favors institutional investors or individuals with significant financial interests in the securities at issue, under the assumption that these plaintiffs will have the resources and incentives to represent the class effectively. This act has had a profound impact on how securities litigation is conducted in the United States, aiming to balance the scales between protecting investors and preventing abuse of the legal system.
- Complexity: In light of recent events, where companies face numerous legal challenges, such as the Avantor class action lawsuit, understanding and navigating the complexities of the PSLRA becomes crucial. The reforms brought by this act are particularly relevant in today’s financial landscape, ensuring that while businesses are shielded from unfounded claims, investors still have avenues to seek justice against genuine instances of fraud or misconduct. The PSLRA continues to play a pivotal role in shaping securities litigation and maintaining fairness in financial markets.

The Lead Plaintiff Deadline in the Avantor Class Action Lawsuit
Lead plaintiff motions for the Avantor class action lawsuit must be filed with the court no later than December 29, 2025. When a securities class action is filed such as the Avantor class action lawsuit :
- The person who files the first complaint is required to publish a notice announcing the filing.
- Anyone who wants to be lead plaintiff on behalf of the class must thereafter file a motion to be appointed as lead plaintiff(s) no later than 60 days after the notice was published.
The Lead Plaintiff Process in the Avantor Class Action Lawsuit
The Private Securities Litigation Reform Act of 1995 (PSLRA) permits any investor who purchased and suffered losses in Avantor stock to seek appointment as lead plaintiff in the Avantor class action lawsuit.
- A lead plaintiff is generally the movant with the greatest financial interest in the relief sought by the putative class who is also typical and adequate of the putative class.
- A lead plaintiff acts on behalf of all other class members in directing the class action lawsuit.
- The lead plaintiff can select a law firm of its choice to litigate the securities class action lawsuit.
- An investor’s ability to share in any potential future recovery of the class action lawsuit is not dependent upon serving as lead plaintiff.
The Benefits of Serving as a Lead Plaintiff in the Avantor Class Action Lawsuit
- Negotiating more competitive attorney fees and reducing litigation costs.
- Managing the litigation by overseeing the progress of the case and reviewing important filings.
- Participating in mediation and settlement discussions.
- Having a voice in decision-making processes regarding the settlement.
- No financial risk, as lead counsel covers all costs and expenses and are paid only if they secure a settlement or judgment recovery for the class
- Potentially enjoying long-term benefits from governance reform resulting from the litigation.
The Responsibilities the Lead Plaintiff Will Have in the Avantor Class Action Lawsuit
- Negotiating more competitive attorney fees and reducing litigation costs.
- Managing the litigation by overseeing the progress of the case and reviewing important filings.
- Participating in mediation and settlement discussions.
- Having a voice in decision-making processes regarding the settlement.
- No financial risk, as lead counsel covers all costs and expenses and are paid only if they secure a settlement or judgment recovery for the class
- Potentially enjoying long-term benefits from governance reform resulting from the litigation.


