“Hailed by peers and clients to be practical and smart with the savvy and experience and good judgment to handle the most complicated matters.”—Benchmark Litigation
“[F]antastic” lawyer who “gives good big picture advice but knows the details of the case really well, so can dive right in.”—Chambers
“[O]utstanding judgement; very strong with regulators and the government.”—Legal 500
“[His] unique blend of public and private sector experience provides clients with multi-dimensional counseling on the most complex legal issues.”—L.A. Times
Lauded in Chambers as an “outstanding” lawyer who is “handling very large cases and trials,” Michael Purpura is a nationally renowned lawyer who has been selected by United States Presidents, Fortune 500 companies, and prominent individuals to solve their most significant legal challenges. He has also been described as a “go-to trial lawyer” who is “very strong with regulators and the government” and “hailed by peers and clients to be practical and smart with savvy experience and good judgment to handle the most complicated matters.”
Mr. Purpura’s unique blend of public and private sector experience allows him to provide clients with multi-dimensional counseling on the most complex legal issues. He has served as an adviser to two United States Presidents, navigating the separation-of-powers issues involving the Executive and Legislative Branches in some of the most significant and high-profile legal and political battles in recent memory. As a Chief Legal Officer for an SEC-registered real estate private equity firm, he was responsible for all legal, compliance, risk, and ethics functions. And in prior work as a commercial litigator and as a prosecutor in both the Southern District of New York and the District of Hawaii, Mr. Purpura successfully tried numerous cases and argued precedent-setting appeals.
Mr. Purpura has had an active pro bono practice, including recently serving as counsel of record and filing an amicus curiae brief in the United States Supreme Court on behalf of 35 former high-ranking military officers in Students for Fair Admissions v. President and Fellows of Harvard College and Students for Fair Admissions v. University of North Carolina, et al., arguing that the Court should uphold the constitutionality of the consideration of race in college admissions. In 2016, he filed a similar amicus curiae brief in Fisher v. University of Texas at Austin.
Mr. Purpura has been repeatedly ranked Band 1 by Chambers and recognized as a Litigation Star by Benchmark Litigation. Named to the Best Lawyers lists in six different legal disciplines, he has also been selected as a “Lawyer of the Year” by Best Lawyers for both Securities Litigation and Appellate Practice.
Mr. Purpura has been an active member in multiple professional and community organizations, serving in key leadership roles. At the University of Hawaii William S. Richardson School of Law, he taught Constitutional Law and a seminar on White Collar Crime and was an Advisory Board member of the Hawaii Innocence Project. Mr. Purpura also served as President of the Federal Bar Association Hawaii Chapter, was a founding member of the Hawaii Federal Trial Academy, and twice served on the United States Magistrate Judge Selection Panel for the District of Hawaii. Finally, Mr. Purpura is a Trustee of The Linsly School in Wheeling, West Virginia, from which he graduated.
A graduate of the United States Military Academy, Mr. Purpura served in the United States Army as a field artillery officer before attending law school.
Experience
Won a “landmark” opioid trial for Endo Pharmaceuticals in a $50 billion action. Three of the most populous counties in California and the City of Oakland brought suit against opioid manufacturers alleging false advertising, unfair competition and public nuisance. The jurisdictions claimed that manufacturers’ alleged false and misleading marketing caused a $50 billion public nuisance. The win was hailed as “giv[ing] drug companies their first major victory in the litigation brought by cities and counties across the country over the opioid crisis,” American Lawyer. (See “How Hueston Hennigan Notched A Landmark Opioid Trial Win,” Law360; “Opioid Makers Win Major Victory in California Trial,” New York Times; “Drug Makers Handed First Win Out of Thousands of National Opioid Crisis Lawsuits,” Newsweek).
Represented the President of the United States and delivered multiple addresses to the United States Senate during the third impeachment trial of a United States President in history.
Represented the former Counsel to the President, former Deputy Counsel to the President, and former Director of National Intelligence before the Select Committee to Investigate the January 6th Attack on the United States Capitol and in the Department of Justice’s investigation of the events of January 6th and the retention of documents at Mar-a-Lago.
Representing former WWE Chairman and CEO Vince McMahon in investigations by the Southern District of New York and SEC involving alleged hush money payments to cover up claims of sexual misconduct.
Representing the State of Hawaii and advising the Governor and Attorney General, secured a historic global settlement exceeding $4 billion which—in less than one year—resolved all claims stemming from the catastrophic Aug. 8, 2023 Maui wildfires, one of the largest natural disasters in the state’s history. (See “Hawaii Inks $4B Maui Wildfires Deal Ahead of Anniversary,” Law360; “Battle with insurers follows $4.03B Maui fire settlement,” Daily Journal; “Who Were the Attorneys Behind the $4B Hawaii Wildfire Settlement?” Law.com).
Representing Southern California Edison and Edison International in litigation arising out of the 2017 Thomas Fire, 2018 Montecito Mudslides, and the 2018 Woolsey Fire.
Secured complete dismissal of all claims in a securities class action filed against PricewaterhouseCoopers by investors of a PwC audit client.
Represented a global accounting firm in an SEC investigation related to accounting irregularities, resulting in no action taken against their firm or any of its employees.
Successfully represented Endo Pharmaceuticals in litigation related to opioid abuse in the U.S. District Court in San Francisco. Following extensive fact and expert development that strengthened Endo’s position, the case favorably settled on the eve of trial. (See “Endo Reaches $10M Deal With SF Ahead Of Opioid Trial,” Law360).
Won a very favorable defense verdict following a five-week bellwether jury trial in a mass action brought against Fortune 100 client. This result led to a similarly favorable global settlement of all related cases for less than 5% of plaintiffs’ demands.
Obtained a complete arbitration victory for large corporate landowner in a dispute to determine value of land, and thus future rent owed. The arbitrators ruled the property was to be valued at more than the client’s 8-figure demand.
Secured a declination for the target of a federal grand jury investigation into alleged violations of the Clean Water Act and related crimes.
Secured a termination of a lengthy SEC investigation of a high-profile client with allegations of insider trading.
Obtained a no-action letter from the SEC on behalf of the Chief Compliance Officer of a hedge fund in an investigation of allegations of improper trading practices. The SEC brought action against the fund and its CEO.
Recognitions
- Litigation: General Commercial, Chambers USA
- Top White Collar Lawyers, Daily Journal
- Litigation Star, Benchmark Litigation
- “Lawyer of the Year” and a leading lawyer in six disciplines, Best Lawyers
- Key Lawyer for Corporate Investigations and White Collar Criminal Defense, Legal 500
- Key Lawyer for General Commercial Disputes, Legal 500
- The Best Lawyers in America (2014-2025)
- Legal Visionary, L.A. Times
Activities
Board of Governors, Association of Business Trial Lawyers, Orange County Chapter
Trustee, The Linsly School
Former Advisory Board Member, Hawaii Innocence Project
Former President, Federal Bar Association Hawaii Chapter
Founding Member, Hawaii Federal Trial Academy
Former Member, United States Magistrate Judge Selection Panel for the District of Hawaii
Former President, Access Tennis