Securities Litigation Against Life Sciences 2025 YIR

Goodwin’s in-depth analysis of trends in securities class action filings in the life sciences industry, including highlights from important court decisions.

Welcome to our 10th annual report on US securities class actions filed against publicly traded life sciences companies, which include pharmaceutical, biotechnology, medical device, and healthcare companies.

In the following sections, we analyze data and trends in securities class actions across all industries and in the life sciences industry in particular. We then highlight important decisions issued in 2025 by federal courts in securities cases brought against life sciences companies and their officers.

Please reach out to the contacts listed below if you have questions or feedback or want to discuss how trends in the industry may affect your business.

Executive Summary

In the context of securities class action litigation, 2025 saw increasing scrutiny and litigation against life sciences companies. Securities class action filings against publicly traded life sciences companies continued an upward trend, jumping to the highest number of filings since 2019 and reaching nearly 50% above the average since 1997. Life sciences companies remain the biggest industry target for federal stockholder class actions. While the number of newly filed cases grew, court rulings continued to trend favorably for defendants throughout 2025, with courts dismissing or substantially narrowing the majority of observed cases.

Context: Securities Class Actions Against Life Sciences Companies

Securities cases against publicly traded life sciences companies are typically filed by stockholders acting on behalf of a proposed class. Usually, the plaintiffs’ objective is to recoup alleged investment losses following a company’s stock price decline. In the context of life sciences companies, those swings in stock price often occur after the announcement of setbacks or issues related to a company’s drugs or products. Issues may include negative feedback or actions from the Food and Drug Administration (FDA); delays, suspensions, or terminations of clinical trials; unfavorable clinical data results; adverse events affecting patients; product recalls; or manufacturing or supply challenges. Plaintiffs typically assert claims under sections 10(b) and 20(a) of the Securities Exchange Act of 1934 (the 1934 Act) and SEC Rule 10b-5, alleging that the company and its officers made false or misleading statements or failed to disclose material information. If the alleged misstatements or omissions are related to a registered securities offering, plaintiffs may bring their claims under sections 11, 12(a)(2), and 15 of the Securities Act of 1933 (the 1933 Act) — often in addition to claims made under the 1934 Act.

Securities Class Action Filings in All Industries in 2025

In 2025, the number of new securities class action filings in federal and state courts decreased to 207, down 8% from 226 in 2024, dropping just below the number of filings in 2022.1 Total “core” filings also decreased in 2025, to 199 from 220 in 2024. This was the first drop in filings since 2022.2

Notably, this decline in the total number of filings was driven by a drop in the number of securities class action cases bringing only Section 10(b) claims under the 1934 Act. In 2025, 176 core securities class action cases filed brought only Section 10(b) and related claims, a significant drop from the 198 such filings in 2024.3 By contrast, state and federal cases brought under the 1933 Act were up slightly year over year, rising to 23 filings in 2025 from 22 filings in 2024.4 The overall drop in filings was due in large part to the drop in class actions related to COVID-19, which fell from their peak of 20 cases in 2022 to just three new cases in 2025.5 As has been the case since their dramatic decline in 2021, M&A class action filings continued to be relatively few in number in 2025, with only eight such federal class action cases filed.6

Life Sciences Analysis: Securities Class Action Filings in 2025

Life sciences companies make up much of the consumer non-cyclical sector. Despite the decrease in core filings overall, the number of cases brought in the consumer non-cyclical sector rose in 2025 to 76 from 66 in 2024. That increase in filings came almost entirely from life sciences industries, with 60 filed securities class actions in 2025, up from 52 in 2024 and nearly 50% higher than the long-run average from 1997 through 2024. As in years past, the consumer non-cyclical sector continues to represent the largest single sector for federal securities class action filings.7 The high volume of filings against life sciences companies in particular is likely due to the inherently volatile nature of their stock prices and the many event-driven disclosures made by companies in the industry. That volatility likely drives the continued focus of the plaintiffs’ bar on life sciences companies. As shown in the chart below, 2025 filings against companies in the life sciences industry were well above the longer-term historical average and rose significantly when compared with the filings in 2024.

Securities cases against life sciences companies continue to be dismissed at about the same rate as other cases. As shown in the table below, 36.5% of federal core securities cases filed against pharmaceutical, biotechnology, and healthcare companies in 2024 were dismissed by the end of 2025 (with 59.6% of such cases still pending), and 50.0% of those cases filed in 2023 had been dismissed. The dismissal rate for cases pending for only one to two years is consistent with the long-term trend of about half of life sciences securities class actions being dismissed by the courts. The comparable number for all core federal filings was 36% of 2024 cases and 46% of 2023 cases.8 Consistent with previous years, the most significant federal circuits for life sciences securities class actions in 2025 were the First, Second, Third, and Ninth circuits.

Rulings in Securities Class Actions in 2025

As in previous years, we continue to focus on jurisdictions that have been the most active in securities class actions filed against life sciences companies: the First Circuit and District of Massachusetts; the Second Circuit, the Southern District of New York, and the Eastern District of New York; the Third Circuit, the District of New Jersey, and the Eastern District of Pennsylvania (added to this report in 2023); and the Ninth Circuit and the California District Courts. The Second and Ninth circuits still have the largest share of all cases, together accounting for 56% of all core federal class action filings (across all industries) in 2025, consistent with the long-term average from 1997 to 2024.9 Core federal filings in the Third Circuit jumped to 26 filings in 2025 from 19 filings in 2024, driven primarily by new filings against life sciences and healthcare companies.10

In 2025, federal courts in these key jurisdictions have continued to issue significant decisions in securities class actions concerning life sciences and healthcare companies in various growth stages, as well as their directors and officers. As in prior years, these cases involve challenges common to life sciences and healthcare companies, including negative clinical trial results, clinical trial delays, outcomes and discussions with FDA, supply and manufacturing issues, drug side effects, adverse events and other safety issues, product rollout, antitrust and regulatory compliance, M&A activity, and revenue projections. We highlight key decisions in each of these jurisdictions below.

While these decisions were largely favorable to defendants, some ruled in favor of stockholder plaintiffs. Of the decisions resolving motions to dismiss, about two-thirds were favorable to defendants, but about one-third of the decisions denied the motion in whole or in part, allowing the case to proceed into the discovery phase and further litigation. Even in the favorable dismissal decisions, courts often gave plaintiffs an opportunity to replead their dismissed claims, continuing a trend in these jurisdictions — particularly within the Ninth Circuit — of giving plaintiffs leeway to amend their deficient pleadings multiple times. Overall, courts were skeptical of plaintiff claims challenging scientific opinions, forward-looking statements forecasting the potential future results of scientific research or regulatory approval efforts, or generic optimistic statements about companies’ business or future prospects. However, courts were more willing to deny motions to dismiss and allow claims to proceed into discovery when plaintiffs could plead that statements concerning concrete facts (e.g., revenue trends in the current quarter or whether clinical trial enrollment had started) were false or misleading.


  1. [1] Securities Class Action Filings — 2025 Year in Review,” Cornerstone Research (2026), at 1, 4.

  2. [2] The number of “core” filings excludes cases filed in connection with an M&A transaction. Id. at 1. Removing M&A filings teased out the historic growth (and then decline) in that category of filings from 2014 through 2022. Id. at 4.

  3. [3] Id. at 4.

  4. [4] Id. at 4.

  5. [5] Id. at 5.

  6. [6] Id. at 4.

  7. [7] Id. at 21.

  8. [8] Id. at 16.

  9. [9] Id. at 22.

  10. [10]Id. at 22.

Securities 2025 Case Summaries

This informational piece, which may be considered advertising under the ethical rules of certain jurisdictions, is provided on the understanding that it does not constitute the rendering of legal advice or other professional advice by Goodwin or its lawyers. Prior results do not guarantee similar outcomes.

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