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Mary C. Fleming

Washington, DC Office

Mary C. Fleming concentrates her practice on trial and appellate litigation. Mary has written briefs and dispositive motions in both state and federal courts, representing individual and corporate clients in complex civil and criminal litigation.

Mary's representations have covered a variety of matters, including securities and mortgage fraud, consumer financial laws, workplace cultural compliance, and export control violations. In addition to her litigation experience, Mary has represented large corporations in government enforcement actions and internal investigations. 

Prior to joining Katten, Mary served as a law clerk to the Honorable Robert E. Bacharach of the US Court of Appeals for the Tenth Circuit. During law school, she was an articles editor of the Vanderbilt Law Review, and received the legal writing Best Appellate Brief Award.

Shown below is a selection of Mary’s engagements.

  • While at a prior firm:
    • Principal drafter of briefs on behalf of an investment advisor representative in an appeal before the Maryland Court of Special Appeals, arising from alleged Maryland securities laws violations.
    • Co-author of briefs in direct criminal appeal before the US Court of Appeals for the Seventh Circuit challenging a federal prisoner’s convictions.
    • Representation of one of the nation’s largest banks in an internal investigation.
    • Drafter of dispositive motions in putative class actions against mortgage servicers and lender-placed insurance providers regarding lender-placed insurance practices.
    • Representation of an individual in a securities law investigation by the Securities and Exchange Commission.
    • Representation of a national bank in facilitating compliance with a large indirect auto settlement agreement.


  • JD, Vanderbilt University Law School, Order of the Coif
  • BA, Florida State University, summa cum laude

Bar Admissions

  • District of Columbia
  • Florida
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