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Jeffrey J. Ansley

Jeff Ansley is the head of Bell Nunnally’s White Collar Criminal and Regulatory Defense practice. Jeff served as both an Assistant United States Attorney for the Northern District of Texas and Enforcement Attorney for the United States Securities and Exchange Commission.

Jeff focuses his practice on white collar criminal and regulatory matters and has represented numerous corporate and individual clients in high stakes litigation before federal courts, the SEC, and other regulators. As a former federal criminal prosecutor and enforcement attorney, he has an insider’s knowledge of the tactics and resources used by prosecutors and investigators. Jeff frequently defends clients in criminal matters involving allegations of health care fraud, securities fraud, violations under the Federal Corrupt Practices Act, and other alleged business crimes.

Jeff represents targets of government health care investigations and prosecutions. His clients include physicians, hospitals, compounding pharmacies and their personnel, and medical organizations and suppliers. Jeff handles matters investigated and prosecuted by the Department of Justice, the Medicare Fraud Strike Force, the Department of Defense, and the Health and Human Services - Office of Inspector, among others.

He also handles federal and state administrative actions instituted by securities and health care regulators, including acting as counsel for corporations and their officers and directors, physicians and physician groups, broker-dealers, investment advisers, and other professionals and organizations.

Jeff further counsels clients in securities litigation matters arising from both public and private securities offerings and acquisitions as well as secondary trading activity. He represents officers, directors, independent committees, investment bankers, accounting firms, and law firms in connection with these high-stakes securities cases. 

Jeff also conducts internal investigations on behalf of corporate clients involving allegations of securities, health care, and tax fraud, possible violations under the Federal Corrupt Practices Act, and trade secret theft violations, among other suspected misconduct. In addition, he develops compliance and ethics programs for corporations and other business entities. Texas Monthly and D Magazine have consistently recognized him for his white collar and regulatory defense practice.

Before entering private practice, Jeff served as an Assistant U.S. Attorney in the Major Fraud and Public Corruption Section of the United States Attorney’s Office for the Northern District of Texas. As a federal prosecutor, Jeff successfully tried and prosecuted multiple complex cases of securities fraud, health care fraud, and other complex crimes. He also led the Securities Fraud Task Force for the Northern District, coordinating the actions of a multi-agency criminal and regulatory task force. Jeff was appointed as a Special Assistant U.S. Attorney for the Northern District of Oklahoma. While with the SEC, Jeff prosecuted a wide variety of suspected federal securities laws violations, including possible financial and accounting fraud, insider trading, offering frauds, registration violations and regulatory compliance matters.


  • J.D., Southern Methodist University Dedman School of Law, 1994
  • B.A., cum laude, Texas A&M University, 1991
  • Named one of the "Best Lawyers in Dallas" by D Magazine, 2014, 2015, 2017.
  • Selected by attorney peers for inclusion in Texas Super Lawyers®, 2010-2016
Activities & Memberships
  • State Bar of Texas
  • Federal Bar Association
  • American Bar Association, White Collar Section
  • Dallas Bar Association, Criminal Law and Securities Law Sections
  • Co-Author, "Compound Pharmacy Crackdown - New Trends In Government Enforcement," December 2016.
  • Co-Author, "The Anatomy of an SEC Investigation," eb5 Investors, Vol. 2, Issue No. 3., August 2015
  • Author, “The Ends Do Not Justify the Means: Pre-Trial Asset Freezes Increasingly Paralyze the Defense,” The Texas Lawbook, March 2014
  • Co-Author, “Facebook, You and the Government: The SEC is Following Your Tweets,” The Texas Lawbook, May 2013
  • Co-author, “Where Did My Privilege Go? Congress and Its Discretion to Ignore the Attorney-Client Privilege,” Criminal Law Bulletin, (West Services, Inc.), Vol. 47, Issue No. 2, December 2011
  • Author, “Risks and Mistakes Come with the Territory: The Difficult Task of the SEC,” The Texas Lawbook, October 2011
  • Author, “Action Items in the Wake of Dodd-Frank,” Texas Lawyer, White-Collar Crime and Forensic Accounting Practice Focus Issue, November 2010
  • Co-author, “Bribery in Foreign Commerce,” California Law Magazine, July 2010
  • Co-author, “Conflicts Between U.S. and U.K. Corporate Privilege Laws,” American Bar Association, Criminal Litigation Newsletter, Vol. 10, No. 1, Fall 2009
  • Co-author, “Commercial Bribery and the New International Norms,” Bloomberg Law Reports, White Collar Crime, October 2009
  • Author, “Investigations Give Rise to Indictments,” Executive Counsel, November, 2008
  • 2016: Speaker, "Essential Information for a Rapidly Changing World," Bell Nunnally CLE Seminar, June
  • 2015: "What You Should Know About Federal Antitrust Enforcement," presented to Trinity Industries, June 30, 2015
  • 2014: Speaker, “Inside the Insider Trading Trial of Mark Cuban,” The Texas Lawbook CLE Presentation
  • 2010: Speaker, “What In-House Counsel Needs to Know about White Collar Issues,” State Bar of Texas 9th Annual Advanced In-House Counsel Course
  • 2009: Speaker, “Preventing White Collar Prosecutions,” International Association of Defense Counsel Annual Meeting
  • 2009: Speaker, “White Collar Prosecutions: What to Do When the Government Comes Calling,” Human Resources Roundtable
  • 2009: Speaker, “Corporate Compliance in the Government Age: When Compliance Leads to Law Enforcement,” Texas General Counsel Forum, September
  • 2008: Speaker, “Saving the Attorney-Client Privilege: Cooperating Without Caving In,” South Texas Law School Forum on White Collar Crime
  • 2008: Speaker, “Your Company’s Exposure Abroad: The Foreign Corrupt Trade Practices Act,” Organization for Women in International Trade, June