Jenner & Block

Gayle E. Littleton, a partner in Jenner & Block’s Investigations, Compliance Defense Practice and former assistant US attorney (AUSA), leads complex corporate internal investigations and represents companies engaged in civil litigation as well as companies and individuals in criminal proceedings. Ms. Littleton’s work focuses on anti-corruption (FCPA), fraud, whistleblower complaints, #MeToo allegations, and regulatory compliance matters.



Ms. Littleton is Chambers USA-ranked in white-collar investigations and was named on Global Investigations Review’s list of 100 “Women in Investigations” globally in 2018.  She serves on Jenner & Block’s Management Committee and co-chairs the firm’s Women’s Forum Steering Committee, comprised of women partners across offices.

Ms. Littleton brings a wealth of experience investigating and litigating criminal and civil matters. She is a seasoned courtroom lawyer and has tried 18 federal cases throughout the country. Ms. Littleton also has briefed and argued numerous appeals before the US Court of Appeals for the Seventh Circuit.



Ms. Littleton understands that investigations and litigation are disruptive and stressful.  She conducts every investigation with a keen focus on being efficient, on treating employees and others with respect, and on causing the least disruption possible.  She does not pre-judge or assume facts, and she ensures complex facts and complicated legal analysis are communicated clearly and simply to help guide her clients to a successful resolution.  Though objective in her approach to investigations, she is a zealous advocate for her clients, willing to push back where appropriate and unafraid of the courtroom.

Ms. Littleton served as a federal prosecutor for 12 years, working in both the Chicago office of the US Attorney's Office for the Northern District of Illinois and in the Northern District of Florida. In the US Attorney's Office in Chicago, Ms. Littleton served on the prosecution team that investigated and prosecuted former Illinois Governor George Ryan's chief of staff. As an AUSA in Florida, Ms. Littleton investigated and prosecuted high-level white-collar cases, including wire, mail, bank, and mortgage fraud, and served as senior litigation counsel to the US attorney, where she advised the US attorney on charging decisions.

While not an exhaustive list, Ms. Littleton’s recent representative matters include:

  • Led multinational FCPA internal investigation in Central Asia and Eastern Europe for international oil field services company, and represented client in parallel DOJ/SEC investigations.
  • Engaged by large publicly traded company to conduct cross-border #MeToo investigation, counseled company on employment and public relations issues, and resolved matter without litigation.
  • Conducted investigation for the board of a large insurer related to whistleblower allegations made by an employee, counseled company on employment issues and regulator contact, and resolved the matter without litigation.
  • Conducted corruption investigation into lobbying and hiring practices of regulated entity and represented clients in parallel DOJ/SEC investigations.
  • Led investigatory teams for the monitor of Credit Suisse AG following the bank’s $715 million settlement with the New York Department of Financial Services, part of a broader $2.6 billion settlement with DOJ and federal regulators.
  • Represented hedge fund to represent in SEC enforcement investigation related to alternate lending positions.
  • Led civil regulatory compliance investigation for a multinational healthcare company related to active pharmaceutical ingredients.
  • Represented real estate developers in a DOJ affirmative civil FCA and FIRREA investigation and resolved the matter pre-litigation.
  • Represented current and former individual employees in FCPA investigations in the oil and gas industry.
  • Represented current and former individual employees in bank-fraud/BSA investigation.
  • Represented former CEO of unicorn company in fraud investigation.