Gregory Dubinsky

A former clerk for the U.S. Supreme Court, D.C. District, and Northern District of Illinois, Greg Dubinsky has a wide-ranging practice in which prominent clients call upon him to handle high-profile, complex matters across the country requiring the highest level of legal acumen and trial know-how.

Greg is currently involved in two of the nation’s most closely watched antitrust disputes. In one, Greg is lead counsel to the plaintiffs in an antitrust class action against Advocate Aurora, a Wisconsin-based hospital network, alleging that it has used its market power to overcharge for medical services. In the other, he is a senior member of the HSG team acting as national lead trial counsel for Visa in the defense of multidistrict antitrust class actions and opt-out litigation asserted by the world’s largest retailers, challenging network rules that benefit all domestic cardholders. On June 9, 2026, the Court granted preliminary approval of a landmark $200 billion settlement in the class action, and the opt-out cases are set for trial in September 2026.

He also represents xAI in a lawsuit in the Southern District of New York brought by influencer Ashley St. Clair over allegedly nonconsensual AI-generated imagery. His team is also representing xAI in a federal lawsuit filed in the Northern District of Texas seeking to enforce a forum-selection clause in xAI’s terms of service. The case raises issues concerning platform liability and AI-generated content.

Greg serves as lead counsel in the United States Supreme Court for the former Georgia Tech women's basketball coach and a university professor concerning the interpretation of Title IX’s private right of action. Greg will argue the case during the Court's upcoming October 2026 Term.

Greg is currently lead counsel for Hands Off NY Care and individual plaintiffs challenging New York City’s transition from a fully insured healthcare plan for city workers and retirees to a self-funded healthcare plan.

In matters involving free speech and privacy law, Greg served as lead counsel for Rumble, obtaining dismissal of two putative class actions alleging violations of the Video Privacy Protection Act. He later secured dismissal of a similar VPPA class action for IBM and currently represents Rumble in litigation under the California Invasion of Privacy Act.

Among other successful representations, Greg secured victories for the National Basketball Association at both the district court level and the U.S. Court of Appeals for the Sixth Circuit in litigation alleging antitrust violations. He also played a major role in an HSG team that tried a $700 million antitrust case against News Corp, overseeing the damages component of the matter.

Greg maintains a significant pro bono practice. He assisted an Afghan national who had trained with U.S. forces in asylum proceedings, secured reversal of claims brought by a transgender victim of prison sexual assault before the Ninth Circuit, and obtained the first successful bail motion for an immigrant detainee in the Second Circuit.

Greg has been named to the Lawdragon 500 X – The Next Generation list since 2023 and to Benchmark Litigation’s 40 & Under List since 2022. He has also been recognized as a Rising Star by the New York Law Journal and Super Lawyers.