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Miriam Vishio
Washington, DC
1775 Pennsylvania Avenue, NW
Suite 375
Washington DC 20006
TEL: (202) 899-4109
FAX: (612) 336-9100
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Practice Areas
Bar and Court Admissions

Miriam R. Vishio

Mimi has extensive litigation and trial experience, representing plaintiffs and defendants in complex antitrust and commercial litigation -- including merger enforcement actions, price-fixing and monopolization cases, and licensing and contractual disputes -- before federal and state courts and in international arbitrations. 

Mimi’s practice centers on antitrust litigation, antitrust compliance counseling, and premerger notification advice and assistance with Hart-Scott-Rodino Act filings. She has experience navigating federal civil and criminal investigations and litigations, complex merger matters, and multi-district antitrust class actions in a diverse array of industries, including financial services, sports, entertainment, advertising, telecommunications, network technology, major appliances, and health insurance. 

Prior to joining Zelle, Mimi was a Trial Attorney with the U.S. Department of Justice’s Antitrust Division, where she led conduct and merger investigations and served as a key member of several litigation and trial teams. For her outstanding contributions to the Division’s antitrust enforcement efforts, Mimi received the Attorney General’s Distinguished Service Award (the DOJ’s second highest performance award) and twice received the Assistant Attorney General’s Award of Distinction.  Before joining the DOJ, Mimi was an antitrust litigator at a large national law firm.

Representative Matters


Represents Freddie Mac and the Federal Deposit Insurance Corporation as Receiver for 38 Closed Banks in the LIBOR antitrust litigation. 

Represented the United States in blocking the $37 billion merger of two large health insurers (United States, et al. v. Aetna, Inc., et al.). 

Represented the United States in an enforcement action to enjoin the $3 billion merger of two major home appliance manufacturers (United States v. AB Electrolux, et al.). 

Represented the United States in challenging the merger of the nation’s two largest cinema advertising networks (United States v. National CineMedia, Inc., et al.). 

Represented plaintiff heavy-duty transmissions manufacturer alleging exclusive dealing claims; the case settled on the eve of trial for $500 million (ZF Meritor LLC, et al. v. Eaton Corporation). 

Represented plaintiff computer software and technology company in a case alleging unlawful monopolization of the PC operating systems market (Novell, Inc. v. Microsoft Corp.). 

Business Litigation 

Represented plaintiff pharmaceutical manufacturer alleging breach of contract claims in International Chamber of Commerce arbitration.  

Represented defendant CEO of a major broker-dealer in a FINRA enforcement proceeding, obtaining dismissal of all claims. 

Represented defendant digital music service as lead trial counsel in a breach of contract case in state court, obtaining dismissal of all claims.

Articles & Presentations

Miriam Vishio Cross-Examination Excerpts Featured in Litigation Magazine, November 20, 2018

"Why Antitrust?" ABA's Section of Antitrust Law, American University's Washington College of Law, October 23, 2018, panelist

"The Latest Trends in Drug Monopolies," Competition Law360, November 29, 2017, co-author

General Overview of U.S. Antitrust Law, Lawline Webcast - Managing Your Risk of Exposure Under U.S. Antitrust Law: A Five-Part Series Presented by Dickstein Shapiro LLP, May 2, 2014 

Do Not Pass Go, Do Not Collect $200 - Navigating Sherman Act § 2, Lawline Webcast - Managing Your Risk of Exposure Under U.S. Antitrust Law: A Five-Part Series Presented by Dickstein Shapiro LLP, May 2, 2014 

High Stakes in Sports-Licensing Antitrust Cases in 2014, Competition, Media & Entertainment, IP and Class Action Law360, December 2013

Professional Affiliations

Pro Bono Activities

Community Service

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