Colleen NoonanRyan


New York + 1.212.326.3444

Colleen Noonan Ryan represents clients facing challenging civil and criminal enforcement actions, regulatory issues, and complex civil litigation in the United States and abroad. She represents companies, boards of directors, and individuals in a wide range of industries. Colleen has defended clients against civil and criminal investigations by the Department of Justice (DOJ), Securities and Exchange Commission (SEC), Commodity Futures Trading Commission (CFTC), and other federal, state, and municipal agencies. Colleen also frequently represents clients with respect to claims brought under federal whistleblower statutes, including the anti-retaliation provisions of the Sarbanes-Oxley Act (SOX). Colleen has significant experience conducting and managing internal investigations for clients on highly sensitive issues.

Colleen has an extensive civil litigation practice. As a securities law and commercial litigation lawyer, she focuses primarily on securities litigation and complex financial products litigation, but she has represented clients in many different contexts. Colleen has worked with clients preparing for all stages of the litigation process.

Colleen also frequently works with clients on compliance-related issues, including assisting with designing, assessing, and strengthening corporate compliance programs.

Colleen maintains an active pro bono practice. She recently served as a Criminal Justice Act (CJA) appointed counsel for several clients facing federal criminal charges and presented oral arguments on behalf of these clients in federal court. Colleen also has represented domestic violence victims and individuals seeking asylum.


  • Deutsche Bank defeats class certification in interest rate swaps antitrust litigationJones Day client Deutsche Bank prevailed in its efforts to defeat class certification in the In re Interest Rate Swaps Antitrust Litigation matter in the Southern District of New York.
  • Citizens Financial Group secures dismissals of putative class action claimsJones Day client Citizens Financial Group Inc. (“Citizens”) secured dismissals of putative class action complaints brought by two shareholders who claim that Citizens violated the Securities Exchange Act of 1934 by making alleged misstatements regarding the extent to which customer appointments were made or kept.
  • Private equity firm pursues fraud claims related to sale of portfolio companyJones Day is serving as lead counsel to a private equity firm and its portfolio company in significant litigation asserting fraud and breaches of contractual representations and warranties in connection with the acquisition of the portfolio company.
  • IBM resolves claims related to alleged exposure to toxic emissionsJones Day client International Business Machines Corporation (IBM) resolved numerous claims brought by hundreds of current and former residents of Endicott, NY alleging personal injuries, diminution in property values, and other damages related to alleged vapor intrusion and historic air emissions in the area from IBM's former manufacturing facility.
  • Major financial institution defends conduct in government investigation of alleged manipulation of derivatives benchmarkJones Day represents a major financial institution in connection with an ongoing U.S. Commodity Futures Trading Commission investigation into the alleged manipulation of a common derivatives benchmark.
  • Reynolds American acquires Lorillard for $27.4 billionJones Day advised Reynolds American Inc. (NYSE: RAI) in its acquisition of Lorillard, Inc. for $27.4 billion and in the related $7.1 billion divestiture to an affiliate of Imperial Tobacco Group and $4.7 billion investment by British American Tobacco, RAI's largest shareholder.
  • Reynolds American defends against eleven shareholder lawsuits in Delaware Chancery CourtJones Day is representing Reynolds American Inc. ("RAI") in eleven shareholder lawsuits in Delaware Chancery Court arising out of RAI's acquisition of Lorillard Inc.
  • Reynolds American defends against shareholder lawsuit in North Carolina state courtJones Day is representing Reynolds American Inc. ("RAI") and its board of directors in a shareholder lawsuit in North Carolina state court arising out of RAI's acquisition of Lorillard.
  • Jones Day team helps clients successfully petition the U.S. Government to become lawful permanent residentsOver the course of three years, associates from Jones Day’s New York Office represented Ms. F and her minor son in their petitions to become lawful permanent residents after they fled the Dominican Republic from her abusive husband.
  • European bank consortium resolves litigation with project sponsor in connection with Spanish solar power plant financingJones Day successfully represented a consortium of thirteen European banks in litigation concerning the construction of two thermosolar power plants in Spain in a billion dollar dispute with the project's sponsor concerning the project financing.
  • Emergency order of protectionOn March 1, 2013, Jones Day obtained a permanent order of protection for Ms. X to protect her against violence from her live-in boyfriend.