Aaron R. Wegrzyn



Aaron R. Wegrzyn (pronounced “Way Grin”) is a litigator in the firm’s Consumer Law, Finance & Class Action Practice Group. He assists clients with a range of complex litigation matters, including cases before Wisconsin state courts and federal courts across the country.

Aaron regularly represents defendants in class action litigation against claims ranging from antitrust to ERISA to RICO. His experience includes successfully moving to dismiss class allegations, defeat class certification, and exclude expert witness testimony under the federal Daubert standard. Aaron also defends clients with respect to FCRA and FDCPA claims filed in federal court. His pro bono work has included representing low-income individuals before the U.S. Court of Appeals for the Seventh Circuit, the U.S. District Court for the Eastern District of Wisconsin, and the Wisconsin Court of Appeals


  • University of Chicago Law School (J.D., with honors, 2013) 
    • Book Review and Essay Editor, University of Chicago Law Review (Volume 80)
    • Ruth Wyatt Rosenson Scholar
  • Marquette University (B.A., magna cum laude, 2010)
    •  Economics Faculty Award for Best Research Paper (2010)

Clerkship/Government Service

Prior to joining the firm, Aaron served as a law clerk to the Honorable Michael B. Brennan of the U.S. Court of Appeals for the Seventh Circuit. While in law school, he interned with the Milwaukee County District Attorney's Office, assisting with prosecutions of homicides and sex offenses.


  • Wisconsin
  • 7th U.S. Circuit Court of Appeals    
  • U.S. District Courts for the Eastern and Western Districts of Wisconsin
  • U.S. District Court for the District of Colorado
  • U.S. District Court for the Eastern District of Michigan

Selected Publications

  • Author, “Parties: Joinder of Parties and Claims, Third-Party Practice, and Class Action Procedure,” Wisconsin Civil Procedure Before Trial (6th ed. 2018), State Bar of Wisconsin, forthcoming
  • Co-author, “Jurisdiction Issues Dog Multistate Class Actions,” Law360 Expert Analysis (March 2, 2018)
  • Co-author, “4 Tips For Applying Arbitration Agreements To TCPA Claims,” Law360 Expert Analysis (Feb. 15, 2018)
  • Co-author, “Wisconsin Supreme Court Aligns State Class Action Statute with Fed. R. Civ. P. 23,” National Law Review (Dec. 26, 2017)
  • Contributing Author, “2017 Annual Review of Antitrust Law Developments – Chapter IX: Private Antitrust Suits,” Antitrust Law Developments (7th ed.), American Bar Association Section of Antitrust Law
  • Author, “Third Circuit Eyes Up Consumers’ Standing, Splits with Seventh Circuit,” National Law Review (Nov. 21, 2017)
  • Author, “Waiting for Gorsuch: SCOTUS Kicks Important Class Action Waiver Case to Next Term,” National Law Review (Feb. 13, 2017)
  • Author, “Wisconsin Supreme Court Addresses Expert Testimony Under Daubert,” National Law Review (Feb. 9, 2017)
  • Co-author, “S.D.N.Y. Dismisses Plaintiffs’ “Shadow Insurance” Class Action Claims,” National Law Review (Sept. 10, 2015)