Manuel J. (“John”) Dominguez is a partner at Cohen Milstein and a member of the Antitrust practice. He focuses on complex, multi-district antitrust litigation, representing individuals and businesses harmed by anticompetitive business practices. Mr. Dominguez also plays a significant role in identifying and investigating potential antitrust violations for the practice.

Mr. Dominguez has been litigating complex antitrust, securities, and consumer cases for more than 20 years, and has served as lead counsel and handled numerous high-profile, high-stakes cases during that time. His efforts have enabled aggrieved businesses and consumers to recover hundreds of millions of dollars.  

A hands-on litigator, Mr. Dominguez currently represents plaintiffs in litigation alleging price-fixing and monopolistic practices in the medical products, finance and other industries. These cases include: 

  • Automotive Parts Antitrust Litigation: Cohen Milstein represents direct purchasers of Bearings, Mini-Bearings, IG coils, Power Window Motors, Valve Timing Control Devices and other automotive parts in a series of antitrust class action lawsuits accusing manufacturers and suppliers of price-fixing and bid-rigging conspiracies. These cases, being litigated in the Eastern District of Michigan in Detroit, stem from the largest antitrust investigation in the history of the U.S. Department of Justice, with over $1 billion in fines and multiple criminal indictments. Bearings is the first matter currently being considered for certification by the court. Mr. Dominguez has significant responsibilities in these cases, including leading discovery efforts against defendants, briefing and assisting experts.  Settlements in several of these cases have recovered more than $500 million for direct purchaser plaintiffs.  
  • Liquid Aluminum Sulfate Antitrust Litigation:  In this action it was alleged that the manufacturers of Aluminum Sulfate, a product used by municipalities for water treatment, conspired to allocate customers, rig bids and fix prices. Mr. Dominguez was appointed by the court to serve on the Plaintiffs’ Steering Committee.  As part of his responsibilities, he has been responsible for selecting class representatives and working on the consolidated amended complaint. Thus far, this case has resulted in the preliminary approval of settlements for direct purchaser plaintiffs of more than $10.7 million in cash and up to $13.5 million from the sale of defendant’s assets resulting from the company’s dissolution or acquisition. 

In addition to antitrust class action litigation, Mr. Dominguez continues to be involved in significant non-class and non-antitrust class actions, including winning a significant motion to dismiss in a non-class action antitrust action brought on behalf of doctors and practice groups against a major insurance company and hospital in Florida in Omni Healthcare, Inc. v. Health First, Inc. The case presented and argued issues of first impression for the middle district of Florida.  Mr. Dominguez was also involved in cutting-edge data privacy breach litigation against AOL for allegedly unlawfully collecting internet search data of millions of users and making their private information available for public downloading. In addition, Mr. Dominguez litigated a highly significant securities matter that settled for hundreds of millions of dollars involving Symbol Technologies Inc., a barcode technology maker that intentionally overstated its revenues through premature revenue recognition, improper consignments arrangements and channel stuffing.

Mr. Dominguez began his career as an Assistant Attorney General in the Attorney General of the State of Florida’s Department of Economic Crimes. In that role, he represented the State of Florida in prosecuting corporations and business entities for alleged violations of Florida’s RICO, antitrust and Unfair and Deceptive Trade Practices Act statutes. Following his service as an Assistant Attorney General, Mr. Dominguez entered private practice, litigating and trying numerous cases involving unfair trade practices and other alleged violations of state and federal consumer protection statutes. In 2000, he joined a premier class action firm focused on antitrust and securities litigation; there, he rose to be one the heads of the firm’s antitrust practice group.

Mr. Dominguez also has been at the forefront of exploring ways to develop and apply e-discovery to the law—authoring white papers and presenting on e-discovery amendments to the Federal Rules of Civil Procedure. He also participated in The Sedona Conference® Working Group 1, the legal industry’s vanguard e-discovery standards organization.

Mr. Dominguez formerly served as the Chair of the Antitrust, Franchise & Trade Regulation Committee of the Florida Bar’s Business Law Section. He previously served as the Vice Chair of that committee and was a member of the Executive Council of Florida Bar’s Business Law Section. He is also co-author of an article that appeared in the Florida Bar Journal, “The Plausibility Standard as a Double Edge Sword:  The application of Twombly and Iqbal to Affirmative Defenses” (Vol. 84, No. 6).

Mr. Dominguez is recognized by the Global Competition Review Who’s Who Legal: Competition (since 2021), Lawdragon 500 Leading Plaintiff Financial Lawyers List (2021), "Super Lawyers" as a top-rated lawyer In Florida (since 2021), “Legal Elite” by Florida Trend (2017-2018), and he has been named a Palm Beach Illustrated “Top Lawyers” (2018).

Mr. Dominguez received a B.A. from Florida International University, and earned his J.D. from the Florida State University Law School, graduating with honors. In law school, he was a member of the Transnational Journal of Law and Policy

  • Assistant Attorney General, Department of Economic Crimes, Florida
  • Chair, Antitrust, Franchise & Trade Regulation Committee, Business Law Section, Florida Bar