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Kathleen (Kate) Reilly is a partner in the firm’s Securities Enforcement & Litigation practice. Kate represents financial services companies, audit and accounting firms, special committees, and public issuer and private companies in securities enforcement, commercial litigation, whistleblower, white collar, and government investigation matters. Kate has significant experience handling actions in state and federal courts, administrative proceedings, and arbitrations. She also routinely conducts internal investigations and defends clients in enforcement matters by the SEC, DOJ, PCAOB, State Attorneys General, and CFTC.

A staunch advocate of pro bono work, Kate is a member of the firm’s Pro Bono Committee and routinely takes on matters involving criminal defendants and educational rights. She also serves on the firm’s Management Committee as well as its Sustainability Committee.

Kate obtained her J.D. at the Villanova University School of Law, from which she graduated magna cum laude and was elected to the Order of the Coif. During law school, she served as an Associate Editor of the Villanova Law Review. Kate earned her B.A. in history and political science from Boston College, graduating cum laude.

Experience

  • Prominent retail company in a complex covert internal investigation into allegations of impropriety within the company's information technology group.
  • Financial services and commercial entities in assisting and conducting internal investigations into alleged impropriety.
  • Fortune 100 company in an investigation and prosecution arising out of a theft of the company's trade secrets, as well as assisting in working with the U.S. Attorney's Office and FBI in connection with their investigation of the individual responsible for the theft.
  • Special litigation committee of a large public issuer in conducting an internal investigation into money transfer practices involving significant criminal and civil litigation exposure.

Perspectives

Singing the Same Tune: SEC and CFTC Announce Oversight Harmony
Enforcement Edge: Shining Light on Government Enforcement
Private Capital: Opportunities, Risks & Regulatory Realities
Panelist, The Future of Banking — An In-Person Financial Services Summit
FinCEN Launches New Whistleblower Webpage
Enforcement Edge: Shining Light on Government Enforcement
Securities Docket Names Four Arnold & Porter Partners to the 2025 ‘Enforcement Elite’
The Legal 500 United States 2025 Recognizes Arnold & Porter Lawyers, Practices
More

Recognition

The Legal 500 US
"Next Generation Partner" Dispute Resolution: Financial Services: Litigation (2021-2025)
"Recommended Lawyer" Dispute Resolution: Securities Litigation: Defense (2023-2025)
"Rising Star" Dispute Resolution: Financial Services: Litigation (2020)
Securities Docket
Enforcement Elite (2025)
Chambers USA
Accountant and Auditor Liability (Nationwide) (2025)

Credentials

Education

  • J.D., Villanova University School of Law, 2009, magna cum laude, Order of the Coif
  • B.A., Boston College, 2006, cum laude

Admissions

  • New York
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, Southern District of New York
Overview