LAWYER PROFILE
Kathleen Harris

Kathleen Harris

UK 2026

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Ranked in 2 practice areas

About

Provided by Arnold & Porter

Practice Areas

Kathleen Harris is co-chair of the firm's anti-corruption practice where she represents companies and individuals in a wide range of industries. She is recognised internationally as a leader in her practice area. She represents an FTSE 100 Company in relation to a financial fraud case and another FTSE 100 Company in relation to a global investigation. Her representations include HP, GSK News UK and have included individuals in relation to investigations into Barclays, Rolls Royce, and Tesco. She is regularly instructed by companies and individuals in a range of other high-profile criminal matters.

Kathleen has broad experience advising government ministers on the development and implementation of policy and fraud strategy, and leading complex overseas enquiries and analyses.

Before joining the firm, Kathleen served as a Senior Civil Servant Heading the Fraud Business Group and Head of Policy at the Serious Fraud Office (SFO), Senior Strategic Policy Adviser in the Attorney General's Office, and held positions in HM Revenue & Customs (HMRC), The Revenue and Customs Prosecutions Office, and the Department of Works and Pensions in the United Kingdom.

Kathleen has led the prosecution of organisations involved in high-profile bribery investigations, complex financial crime, general crime and tax evasion.

Chambers Review

Provided by Chambers

Chambers Guide to the Legal Profession

Corporate Crime & Investigations - London (Firms)

Band 1
Band 1

Individual Editorial

Kathleen Harris offers particular expertise in both internal and external investigations into bribery, fraud and tax evasion. She also advises clients on compliance matters.

Financial Crime: Individuals - London (Firms)

Band 3
Band 3

Individual Editorial

Kathleen Harris is managing partner of Arnold & Porter's London office and practice head of the firm's anti-corruption team. She often represents senior executives and other high-profile individuals facing a range of criminal and regulatory investigations.

Strengths

Provided by Chambers

  • Kathleen Harris is a standout superstar. She built a phenomenal practice.

    Corporate Crime & InvestigationsChambers Guide to the Legal Profession
  • Kathleen is quite extraordinary and never seems to stop working. She is genuinely working all the time and works so hard for her client. She makes sure what needs to happen happens.

    Corporate Crime & InvestigationsChambers Guide to the Legal Profession
  • She is the best lawyer ever.

    Financial Crime: IndividualsChambers Guide to the Legal Profession
  • She is an outstanding corporate defence lawyer with a commanding level of expertise in a wide range of cases. Her ability to assess the merits and issues of any investigation is unsurpassed.

    Financial Crime: IndividualsChambers Guide to the Legal Profession
  • She has a fine instinct for the real issues in any case and has the ability to see exactly where any case is or should be going. Many clients have good reason to be grateful to her.

    Financial Crime: IndividualsChambers Guide to the Legal Profession

Ranked Individuals at Arnold & Porter (18)

London (Firms)

UK-wide

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