We defend federal and state securities claims against entities and individuals, and derivative and other claims against corporations and their officers and directors. These claims address areas such as prospectus and other disclosure obligations, restatements, mutual fund trading and marketing, broker-dealer duties to clients and counter-parties, fiduciary duties and insider trading. Many of the over 300 securities class actions that we have defended have been for technology companies (including high-tech, biotech and pharmaceutical companies). We also have substantial experience in representing investment banks, broker-dealers and other securities industry participants, investment advisory and mutual fund companies, life insurance and other financial services firms, REITs, and retailers. In recent matters, our lawyers have:

  • Defended mutual fund advisers in the consolidated Market Timing multidistrict litigation (MDL) proceedings, class and institutional investor claims regarding investment advisor fees, and class actions concerning mutual fund marketing practices
  • Taken a leadership role in the defense of over 300 consolidated securities class actions—the IPO Laddering Litigation—and separately obtained the dismissal of class actions against an underwriter challenging IPO allocations and alleged IPO flipping
  • Represented an investment bank in its successful appeal to the Second Circuit of a $164.5 million jury verdict for losses sustained in a nondiscretionary currency trading account

For more on our securities practice, please see our Securities Department pages.


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Weiss, Harry J.

Harry J. Weiss

Chair, Securities Litigation and Enforcement Practice Group

+1 202 663 6993 (t)

Publications & News


November 24, 2015

Four Things Companies Should Know About the SEC’s 2015 Whistleblower Report

The SEC recently published data showing significant increases in tips received under its Dodd-Frank Whistleblower Program. Released on November 16, the 2015 annual report also provided important guidance to companies on the SEC’s whistleblower-related priorities through fiscal year 2016.

November 23, 2015

WilmerHale Among Top 10 Largest Global Securities and White Collar Law Practices

Law360 has ranked WilmerHale number six in its 2015 Securities/White Collar Practice Group Partner Rankings, which recognize the 100 largest and most powerful securities and white collar practices in the nation.

November 19, 2015

Karen Green Honored Among Mass Lawyers Weekly 2015 Top Women of Law and Inducted Into Circle of Excellence

Massachusetts Lawyers Weekly has named longtime WilmerHale Partner Karen Green to its Top Women of Law list for 2015—a recognition that honors “women who have made tremendous professional strides and demonstrated great accomplishments in the legal field.”

November 2, 2015

WilmerHale Receives Top Rankings, Named “Law Firm of the Year” in Mutual Funds Law in 2016 U.S. News - Best Lawyers® “Best Law Firms” List

U.S. News - Best Lawyers® has named WilmerHale "Law Firm of the Year" in Mutual Funds Law and recognizes the firm as a first-tier law firm in 21 national and 58 metro-area rankings. In addition, the firm boasts more than 30 second- and third-tier rankings.

October 27, 2015

John Pierce Discusses Restatement of the US Law of International Commercial Arbitration During Bench-Bar Dialogue Session

Partner John Pierce led a Bench-Bar Dialogue at the United States Courthouse in Manhattan with Professor George A. Bermann of Columbia Law School, the chief reporter of the first-ever Restatement of the US Law of International Commercial Arbitration.

October 27, 2015

Partner Sharon Levin Receives Prestigious Attorney General’s Award for Distinguished Service

Sharon Cohen Levin and a multi-agency team received the 2015 Attorney General’s Award for Distinguished Service—one of the highest accolades a legal team or individual can receive by the Department of Justice. Attorney General Loretta E. Lynch presented the award to Levin and the team at the 63rd Annual Attorney General’s Awards Ceremony.

October 26, 2015

Military Lending Act Poses Challenges and Risks for Lenders

An article by Daniel T. Chaudoin, Bradford Hardin Jr. and Gideon Hart, published in the October 2015 edition of Banking & Financial Services Policy Report, Vol. 34, No. 10.

September 25, 2015

WilmerHale's Investigations Practice Ranks Second in GIR's "Top 30" Inaugural Listing

WilmerHale's investigations practice is named at the top of Global Investigations Review's inaugural listing of the 30 leading global investigations and compliance practices.

September 17, 2015

Diversity Journal Recognizes Two Partners Among Women Worth Watching

Partners Elizabeth Mitchell and Heather Zachary have been named to Diversity Journal's annual list of Women Worth Watching, which recognizes professional women for their passion, potential and positive influence both inside and outside the workplace.

September 15, 2015

Second Circuit Allows Whistleblower Retaliation Protection Without Reporting to SEC

In a 2-1 decision in Berman v. Neo@Ogilvy LLC, the US Court of Appeals for the Second Circuit ruled that whistleblowers who report securities law violations internally but not to the US Securities and Exchange Commission are protected under the Dodd-Frank Act from employer retaliation.