Nathan D. Prosser

Nathan D. Prosser is a litigation partner with Hellmuth & Johnson PLLC. Nate focuses his practice on complex civil litigation and consumer class actions. His experience includes disputes involving consumer protection, antitrust and unfair competition, products liability, securities/financial fraud, and general business litigation.

Nate has spent his entire legal career seeking justice, starting with his first position as an assistant county prosecutor enforcing criminal matters in state court. Since then, he has spent the majority of his career representing clients in complex commercial and class action litigation. Nate understands how important it is to keep businesses accountable for maintaining fair and ethical practices, and values each and every client who is willing to pursue justice in these matters.

Clients rely on Nate’s ability to calmly and confidently lead them through the unpredictable waters of litigation. He leverages his extensive litigation background and proven trial experience to assist his clients in managing risk and maximizing litigation strategies. Nate enters each dispute strategically and efficiently to build a compelling narrative to achieve a successful outcome.

Nate has represented groups of consumers, shareholders, institutional investors, and individual investors in financial fraud matters involving false or misleading material statements against publically traded corporations, as well as misappropriation of funds by financial advisors.

In Nate’s antitrust and consumer legal work, he represents large classes of individuals and corporations that are seeking to recover financial retribution caused by unfair market collusion and pricing activity. He has prosecuted national and global cartels on behalf of individuals and businesses injured by anticompetitive conduct in the marketplace, and he has successfully assisted plaintiffs and classes in recovering millions of dollars in damages for consumers.

Nate also has unique experience in legal administration services as an ediscovery consultant and in class action administration making him extremely knowledgeable in understanding litigation technology capabilities and the associated costs. He has been retained by law firms and corporations to consult on numerous ediscovery processes including information governance, legal hold processes, data collection, and the processing, review, and production of electronically stored information.

Nate is admitted to practice in the Minnesota State Bar and the U.S. District Court for the District of Minnesota.



  • Co-lead counsel representing a class of consumers who have brought consumer protection claims against international health and fitness manufacturers for performance misrepresentations of exercise equipment.
  • Co-lead counsel representing a class of consumers against an American multinational manufacturer and marketer of home appliances for fraudulent misrepresentation and warranty claims concerning the specific performance capabilities of high-end blenders.
  • Co-lead counsel representing a class of consumers seeking justice against a major United States auto insurance company for unlawful business practices which have caused financial harm to a class of consumers.
  • Represents a group of indirect purchaser plumbing companies in a class action against an international manufacturer of plumbing and HVAC solutions for price fixing of copper press fittings.
  • Represents a group of indirect purchaser consumers in an antitrust class action against a major U.S. construction material manufacturer and distributor for price fixing of interior doors.
  • Served on a litigation team that represented an institutional investor who recovered a historical settlement of multiple billions of dollars related to a media conglomerate merger.
  • Represented a class of shareholders that recovered hundreds of millions of dollars for investors against one of the largest mortgage crisis offenders.

In The News

Thought Leadership


  • Member, Chaska Rotary Club


  • Volunteer, Minnesota Volunteer Lawyers Network
  • Volunteer Judge, Minnesota State Bar Association Mock Trial

Honors & Awards

  • Named multiple times to the Minnesota Rising Stars, only 2.5% of young attorneys in the state are chosen each year

Past Seminars