Sean McGrane is a litigation partner who focuses his practice on defending corporations and their officers and directors against civil securities-fraud claims, shareholder derivative actions, and mergers and acquisition lawsuits. His practice includes representing clients in investigations or proceedings brought by governmental or other regulatory agencies, including the US Securities and Exchange Commission (SEC) and the Financial Industry Regulatory Authority. Before joining the firm, Sean practiced securities litigation in the New York offices of Skadden, Arps, Slate, Meagher & Flom LLP. Sean has written on the federal securities laws and has given guest lectures on securities and shareholder litigation at the Cleveland-Marshall College of Law.

In addition to his securities practice, Sean maintains an active sports law practice, which includes representing professional sports franchises, collegiate bodies and professional athletes. In October 2019, Sean served as a moderator at the firm’s initial Sports Integrity Roundtable in Washington DC, which explored legal issues around the emergence of legalized sports gambling in many parts of the US.

Prior to attending law school, Sean worked as a political journalist in Washington DC and New York for four years.

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  • Successfully arguing for and obtaining a unanimous affirmance from the US Court of Appeals for the Eighth Circuit on a grant of summary judgment in a case involving the issuance of trust-preferred securities.
  • Defending corporations and their officers and directors against claims brought by private investors under the federal securities laws, including claims for violations of Sections 10(b), 14(a) and 20 of the Securities Exchange Act of 1934, and Sections 11 and 12 of the Securities Act of 1933.
  • Representing corporations (buyers and sellers) in actions brought by investors claiming breaches of fiduciary duties and seeking to enjoin pending mergers and acquisitions.
  • Defending a foreign investment bank against claims asserted by the Federal Housing Finance Agency for violations of the Securities Act of 1933 in what is believed to be the largest coordinated mortgage-backed securities case in history.
  • Representing clients in connection with insider trading investigations commenced by the SEC and FINRA.
  • Representing a Big Four accounting firm against claims for professional malpractice and securities fraud.
  • Representing the National Collegiate Athletic Association in numerous concussion-related lawsuits.


  • University of Michigan, J.D., 2010
  • Georgetown University, B.A., 2003


  • New York, 2011
  • Ohio, 2013


  • U.S. Dist. Ct., S. Dist. of New York
  • U.S. Dist. Ct., N. Dist. of Ohio
  • U.S. Ct. of App., Second Circuit
  • U.S. Ct. of App., Eighth Circuit
  • Listed in Best Lawyers: Ones to Watch in America 2024 for Securities Litigation
  • Recognized in Ohio Super Lawyers – Rising Stars

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  • Co-author, “ESG Enforcement Risks: From ‘Greenwashing’ to ‘Wokewashing’,” ACC Docket, July 19, 2022.
  • Co-author, “US Supreme Court Refuses to Overturn Fraud-on-the-Market Presumption,” June 23, 2014.
  • Note, “Katrina, Federalism, and Military Law Enforcement: A New Exception to the Posse Comitatus Act,” Michigan Law Review, 2010.

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