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Allison Reimann

Allison W. Reimann

  • Biography
  • Representative Experience
  • Admissions, Activities & Honors
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  • Education
Allison Reimann

Allison is a litigation shareholder and co-chair of Godfrey & Kahn’s firm-wide antitrust practice.

A substantial portion of Allison’s practice is in the area of antitrust, including litigation, corporate counseling, and mergers and acquisitions. Allison’s antitrust litigation experience includes individual and class actions brought under federal and state antitrust laws regarding issues such as territorial allocation, most favored nations clauses, exclusive dealing, other exclusionary conduct in contracting, and alleged “sham” government petitioning.

Allison also regularly counsels clients on a variety of antitrust issues including minimum advertised price policies, resale price maintenance, product distribution, covenants not to compete, information sharing, and joint ventures and other competitor collaborations. She also advises clients on antitrust issues in mergers and acquisitions including information sharing, antitrust risk evaluation, and pre-merger antitrust investigations, including second requests under the Hart-Scott-Rodino Act.

Allison has considerable experience in civil litigation and government investigations in the health care industry, for clients including health systems, health insurers, providers, and pharmaceutical and medical device manufacturers and wholesalers. These matters include antitrust litigation, government investigations and civil litigation under the False Claims Act and state equivalents, grand jury subpoenas involving alleged health care fraud, and complex commercial disputes.

Allison also represents clients in litigation matters involving deceptive trade practices, business torts, trademarks and contract disputes. She also has represented executives and other employees in internal investigations and served as separate counsel for individual witnesses and defendants in civil and criminal investigations and civil lawsuits. In addition, Allison frequently assists other law firms as co-counsel and local counsel in Wisconsin courts.

Allison recently was named a Best Lawyers One to Watch for antitrust as well as a “Leader in the Law” by the Wisconsin Law Journal. 

Prior to joining Godfrey & Kahn, Allison practiced antitrust litigation and health care litigation at Sidley Austin LLP in Chicago for six years. She also was a law clerk for the Honorable William C. Canby, Jr. of the Ninth Circuit Court of Appeals.

Representative Experience


Counsel for health insurer in a monopolization action against a dominant competitor based on the use of most favored nations clauses in payer agreements 

Defense of dental insurer in antitrust class action challenging territorial restrictions in trademark licensing agreements

Defense of clinical laboratory in several antitrust cases based on alleged exclusionary practices, resulting in several successful motions to dismiss that were upheld on appeal

Defense of clothing retailer in monopolization action in which the federal district court struck the plaintiff’s economic expert testimony, followed by an order entering summary judgment in client’s favor

White Collar and Government Investigations 

Counsel for a clinical laboratory in False Claims Act matter challenging client’s Medicaid billing practices, resulting in summary judgment in client’s favor

Defense of health care providers and systems in federal investigations involving alleged violations of the False Claims Act and fraud against Medicare, Medicaid, and Tricare programs

Separate counsel for former employees of OEM automotive manufacturer in civil lawsuits and criminal investigation 

Other Litigation 

Defense of pharmaceutical wholesaler in multi-million dollar contractual dispute involving payment of drug rebates

Defense of hospital and health system in employment action by former nurse alleging retaliatory discharge

Defense of residential property company in deceptive trade practices action brought by the Wisconsin Department of Justice and individual consumers

Admitted To Practice



Court Admissions

United States Court of Appeals, Ninth Circuit
United States Court of Appeals, Second Circuit
United States District Court, Northern District of Illinois
United States District Court, Central District of Illinois
United States District Court, Eastern District of Michigan
United States District Court, Eastern District of Wisconsin
United States District Court, Western District of Wisconsin

Professional Associations

American Bar Association Antitrust Law Section
American Health Lawyers Association
Seventh Circuit Bar Association
Western District of Wisconsin Bar Association


Foundation for Madison’s Public Schools – Board Member

Seventh Circuit Bar Association Diversity & Inclusion Committee


Honored as a 2020 "Leader in the Law" by the Wisconsin Law Journal

Recognized by Best Lawyers “Ones to Watch” (Antitrust Law, 2021)



Juris Doctor, University of Pennsylvania Law School, magna cum laude, Order of the Coif, 2009

Bachelor of Arts, Kalamazoo College, magna cum laude, 2000

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Jessica Helmers


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