Advocating for Fair Competition

Simonsen Sussman LLP

We are an antitrust law firm founded by former federal enforcers who together have decades of experience litigating federal and state antitrust and unfair competition laws through government investigations and in private and public actions across the country.

We seek to fill significant gaps in enforcement by helping entrepreneurs, new entrants, small businesses, workers, and other victims of anticompetitive and unfair practices, as well as state and local governments, chart creative, strategic, and cost-effective paths to relief from violations of the competition laws.

Our Team

Partner & Co-Founder
Los Angeles, CA

Partner & Co-Founder
New York, NY

Kate Brubacher

Nicolas Stebinger

Shaoul Sussman

Catherine Simonsen

Partner & Co-Founder
Washington, DC

Partner & Co-Founder
Kansas City, KS

Get in Touch

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