Jenner & Block

Dan Fenske is a litigator, with an emphasis in antitrust, commercial, appellate, and criminal defense cases.

Among other litigation matters, Mr. Fenske has represented:

  • Major international companies or their employees in antitrust investigations and civil litigation;
  • A consumer lender and loan servicers in nationwide litigation brought by state regulatory agencies and plaintiff classes relating to state consumer lending statutes.  Mr. Fenske has represented these clients before state administrative agencies, and in state and federal trial and appellate courts throughout the country; and
  • A start-up trading firm in bet-the-company litigation with a competitor that focused on trade secrets and restrictive covenant claims. In that capacity, he participated in proceedings in the Illinois state and appellate courts, as well as before an arbitration panel.

As to his appellate practice in particular, Mr. Fenske has represented clients in the state and federal courts throughout the country, often serving as the primary drafter of appellate briefs.  In addition, he has argued before the Seventh Circuit Court of Appeals.

Mr. Fenske also maintains an active pro bono practice.  He has represented two men wrongfully accused of murder—including as a member of the trial team in one of those cases.  In both cases, the clients were exonerated and freed from prison after lengthy incarceration.  In addition, Mr. Fenske served as a lead attorney in both the federal district and appellate courts for detained individuals in a Section 1983 suit challenging their conditions of confinement. 

Prior to joining Jenner & Block, Mr. Fenske interned in the United States Attorney’s Office for the Northern District of Illinois. While at the U.S. Attorney’s Office, he assisted with federal criminal prosecutions for mail fraud, public corruption, and tax evasion. Mr. Fenske served as executive articles editor of the Northwestern University Law Review.  He is the past chair of the Antitrust Committee of the Chicago Bar Association.