Robert J. Wierenga
Bob Wierenga’s practice focuses on complex commercial litigation, with an emphasis on antitrust litigation and class action defense.

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He has a wide range of experience in counseling large and small clients on antitrust, intellectual property, and fair trade issues arising under federal, state, and foreign law. He has represented clients in antitrust cases, consumer class actions, and other complex disputes in courts around the country, and has assisted clients who have been contacted by the U.S. Department of Justice, the Canadian Competition Bureau, and the European Commission’s Directorate General for Competition. He also regularly counsels clients involved in litigation or arbitration arising out of complex commercial contracts or partnership agreements.
Bob is the coordinating partner of the firm’s Ann Arbor office.
Client Work
- Tichy v. Hyatt Hotels Corp., et al., (N.D. Ill. 2018) Defending client in antitrust case alleging agreement to restrict advertising.
- Deppe v. NCAA (7th Cir. 2018). Defended NCAA against putative class action challenging transfer rules.
- Encana Oil & Gas v. Zaremba Family Farms (6th Cir. 2018). Defended client against price-fixing and fraud claims. Accordion Toggle
Publications, Presentations & Recognitions
Publications
- “The BCS: Antitrust Goes Bowling?” (co-author) GCP Magazine (May 2009)
- “What Happens When Someone Calls a Foul on the Referee?” (co-author) The ABA Trade Association Committee Newsletter (Summer 2007)
Presentations
- “When Must Competitors Compete? Antitrust, Sports and the ‘Trade or Commerce’ Requirement,” ABA Antitrust Section Brown Bag Teleconference (Oct. 24, 2008)
Recognitions
- The Best Lawyers in America, Best Lawyers (2019-2024)
- Michigan Super Lawyers, Thomson Reuters (2012-2021)
- Michigan Leading Lawyer, Law Bulletin’s Leading Lawyers Network (2015-2021)
- Who’s Who Legal – Sports & Entertainment, Law Business Research (2016)
Boards, Memberships & Certifications
Memberships
- American Bar Association, Antitrust Law Section
- State Bar of Michigan, Antitrust, Franchise and Trade Regulation Section, Litigation Section
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Education
University of Michigan Law School, JD, magna cum laude, Order of the Coif, 1995University of Michigan, BA, 1991