Gregory A.Markel

Partner

With his many years of experience and record of success for clients, Greg delivers the highest level of excellence in complex commercial, derivative, and securities litigation.


More About Greg

Greg is a nationally known trial lawyer who has served as a trial lawyer, expert witness, and arbitrator in securities, derivatives, corporate governance, mergers and acquisition, directors and officers liability, and antitrust litigation, as well as other complex commercial litigation, particularly in bet-your-company cases. He is chair of the New York Litigation group, co-chair of the Securities and Fiduciary Duty Litigation group, and a member of the National Litigation Leadership Team.

Greg is a recognized leader in the profession. For years, he has been highly ranked by Chambers for securities litigation (2007-2023). He has been named by Best Lawyers in America regularly over the years as a leading litigator for securities (2011-2024), antitrust (2011-2024), and M&A litigation (2011-2024) (Woodward/White Inc.). He also has been named by Best Lawyers as New York M&A Litigation "Lawyer of the Year" (Woodward/White Inc.) (2013, 2017-2018, and 2024). LawDragon magazine inducted Greg into its Hall of Fame and recognized him as a "legend" and one of only 50 lawyers and judges in the United States who have who have been recognized by LawDragon 500 for 10 consecutive years (2014-2023), and he is again named one of the top 500 leading litigators in the United states for 2024. He has been recognized by many other publications, including by Benchmark Litigation as a national Litigation Star (2007-2023); and for outstanding performance and several times by the Legal 500 as a Leading Commercial Litigator in 2023 (Legalese Ltd.). He has been listed many times in Super Lawyers (Thomson Reuters) (2006-2019), "Best in Class" in the legal profession by BestofUS.com; and The International Who’s Who of Commercial Litigators by Who’s Who Legal Data (Law Business Research Ltd.). Greg frequently speaks on panels and writes on a range of topics, such as director’s and officer’s liability, securities litigation, commercial litigation, accountants’ defense, law firm management, as well as internet litigation, ESG, and diversity and inclusion. (Click News & Insights tab above.)

He is a member of the Business Law, Litigation, and Antitrust sections of the American Bar Association; the Federal Bar Council; the New York City Bar; the Securities Industry Association – Compliance & Legal Division; the New York State Bar Association – Commercial Litigation Section and the New York County Lawyers Association (NYCLA). He is the founder and chair of the Center for Corporate Governance at NYCLA.

Greg works with Seyfarth partners and associates in a recently much-enlarged securities group in New York, and has helped grow the securities practice Seyfarth offices in Boston, San Francisco, Washington, DC, Houston, Atlanta, and Chicago. The distinctive feature the Litigation department offers is straightforward—the highest level of excellence in complex and securities litigation, coupled with lower costs than its strongest competitors. The practice group provides lower-than-market rates for such work, along with efficiency and lean staffing, which means significantly lower costs for clients. This value proposition of excellence at lower costs sets the Seyfarth team apart.

Greg is proud of Seyfarth’s team approach and commitment to serving clients. He makes it a priority to mentor up-and-coming attorneys, ensuring clients a broad-based commitment to excellence throughout the litigation teams.

  • JD, Yale Law School
  • MBA, University of Michigan
    with distinction
  • BA, Columbia University
  • New York
  • US District Court, Northern District of Illinois (Trial Bar)