Mark Lanpher is a partner in the Litigation practice and Head of the Washington, D.C. Office.

He focuses on white collar, securities, anti-corruption, tax, and other regulatory enforcement investigations and complex litigation matters. He has represented clients in various industries, and regularly works on matters before the Securities and Exchange Commission, Department of Justice, CFTC, FINRA, FTC, IRS, and other Government agencies. 

Mr. Lanpher previously served as an Assistant United States Attorney in the United States Attorney’s Office for the Southern District of New York and as Assistant Chief Litigation Counsel in the SEC’s Division of Enforcement in Washington. As a federal prosecutor, Mr. Lanpher served as lead prosecutor and trial counsel on a number of high-profile cases, and also argued appeals before the United States Court of Appeals for the Second Circuit. Mr. Lanpher served in the Office’s Organized Crime Unit, where he prosecuted cases under the Racketeer Influenced and Corrupt Organizations Act (“RICO”), and various fraud statutes; he also served as part of the Office’s Mortgage Fraud Task Force created in the wake of the financial crisis in 2008. For his work as a prosecutor, the United States Attorney General awarded Mr. Lanpher with the John Marshall Award for Trial of Litigation in 2011, and in 2010, Mr. Lanpher was awarded the Federal Law Enforcement Foundation’s Prosecutor of the Year Award. While at the SEC, Mr. Lanpher played a leadership role in numerous significant SEC enforcement investigations, cases, and settlements, including enforcement actions targeting accounting fraud, offering fraud, CDOs, pump-and-dump schemes, and insider trading. In addition, Mr. Lanpher was a member of the SEC’s Cross-Border Working Group and played a key role in investigations and litigations targeting accounting fraud at China-based issuers, addressing the cross-border issues presented by such government investigations.

Prior to his Government service with the Department of Justice and the Securities and Exchange Commission, following law school, Mr. Lanpher served as a law clerk to Chief Judge Edward R. Korman on the United States District Court for the Eastern District of New York, and as a law clerk to Judge Reena Raggi on the United States Court of Appeals for the Second Circuit.

In 2017, Global Investigations Review selected Mr. Lanpher for its “40 Under 40” list of the world’s leading young investigations specialists. Benchmark Litigation selected Mr. Lanpher for its “Under 40 Hot List” in 2016 and 2017 and also recognized him as a “Future Star” in its 2015-2022 editions.