Securities Class Action Filings


Cornerstone Research, in cooperation with the Stanford Law School Securities Class Action Clearinghouse, publishes a series of reports on securities class actions filed after the passage of the Private Securities Litigation Reform Act of 1995 (PSLRA or Reform Act).

Our reports are widely cited, providing comprehensive statistics on historical and recent filings activity, characteristics, and trends.

Securities Class Action Clearinghouse (SCAC)

SCAC is cosponsored by Cornerstone Research and Stanford Law School. It includes regularly updated information on post–PSLRA federal securities class actions. This data provides the research sample for our semiannual report.

  • 25+

    Years of data

  • 6K+

    Filing records

  • 2

    Filings reports released each year


Securities Class Action Filings

Plaintiffs filed 110 new securities class action lawsuits in federal and state courts in the first half of 2022.

2021 Year in Review

Securities Class Action Filings

The report found plaintiffs filed far fewer securities class action complaints in 2021 than in the previous year.

2021 Midyear Assessment

Securities Class Action Filings

This report shows that overall filing activity dropped considerably in the first half of 2021, falling to 112 filings from 150 filings in the second half of 2020.

2020 Year in Review

Securities Class Action Filings

This report found that declines in state court filings and filings related to M&A contributed to a 22% decrease in the number of securities class actions filed in 2020.



  • Silicon Valley

Alexander “Sasha” Aganin

Senior Vice President

Contact Us

If you have any questions about this research or are looking for a previous version of this report, contact us for assistance.

"*" indicates required fields

This field is for validation purposes and should be left unchanged.