Practice Areas:
Competition/antitrust
Appellate
Commercial
Jurisdictions:
Biography
Gregory Dubinsky is a Partner at Holwell Shuster & Goldberg LLP and a former law clerk to the U.S. Supreme Court, the U.S. District Court for the District of Columbia, and the U.S. District Court for the Northern District of Illinois. He has a broad litigation practice focused on high-profile, complex disputes requiring sophisticated appellate, trial and strategic litigation experience.
Greg is currently involved in several nationally significant matters. He serves as lead counsel to plaintiffs in an antitrust class action against Advocate Aurora, alleging the hospital network used its market power to overcharge for medical services. He is also a senior member of the HSG team serving as national lead trial counsel for Visa in multidistrict antitrust class actions and opt-out litigation involving challenges to card network rules. The related class action received preliminary approval for a landmark USD 200 billion settlement on June 9, 2026.
Greg also represents xAI in litigation concerning alleged nonconsensual AI-generated imagery and in related proceedings involving enforcement of forum-selection provisions and issues surrounding platform liability and AI-generated content.
In the U.S. Supreme Court, Greg serves as lead counsel for a former Georgia Tech women’s basketball coach and a university professor in a Title IX matter concerning the scope of the statute’s private right of action. He is scheduled to argue the case during the Court’s October 2026 Term.
He also represents Hands Off NY Care and individual plaintiffs challenging New York City’s transition from a fully insured healthcare plan to a self-funded healthcare plan for city workers and retirees.
In privacy and free speech matters, Greg has secured dismissal of multiple Video Privacy Protection Act class actions for Rumble and IBM and currently represents Rumble in litigation involving the California Invasion of Privacy Act.
Additional notable representations include successful antitrust litigation for the National Basketball Association and participation in a USD 700 million antitrust action against News Corp, where he oversaw the damages component of the case.
Greg maintains an active pro bono practice, including asylum representation, appellate advocacy for transgender prisoners and immigration detention matters. He has been recognized by Lawdragon, Benchmark Litigation, the New York Law Journal and Super Lawyers.
Greg is currently involved in several nationally significant matters. He serves as lead counsel to plaintiffs in an antitrust class action against Advocate Aurora, alleging the hospital network used its market power to overcharge for medical services. He is also a senior member of the HSG team serving as national lead trial counsel for Visa in multidistrict antitrust class actions and opt-out litigation involving challenges to card network rules. The related class action received preliminary approval for a landmark USD 200 billion settlement on June 9, 2026.
Greg also represents xAI in litigation concerning alleged nonconsensual AI-generated imagery and in related proceedings involving enforcement of forum-selection provisions and issues surrounding platform liability and AI-generated content.
In the U.S. Supreme Court, Greg serves as lead counsel for a former Georgia Tech women’s basketball coach and a university professor in a Title IX matter concerning the scope of the statute’s private right of action. He is scheduled to argue the case during the Court’s October 2026 Term.
He also represents Hands Off NY Care and individual plaintiffs challenging New York City’s transition from a fully insured healthcare plan to a self-funded healthcare plan for city workers and retirees.
In privacy and free speech matters, Greg has secured dismissal of multiple Video Privacy Protection Act class actions for Rumble and IBM and currently represents Rumble in litigation involving the California Invasion of Privacy Act.
Additional notable representations include successful antitrust litigation for the National Basketball Association and participation in a USD 700 million antitrust action against News Corp, where he oversaw the damages component of the case.
Greg maintains an active pro bono practice, including asylum representation, appellate advocacy for transgender prisoners and immigration detention matters. He has been recognized by Lawdragon, Benchmark Litigation, the New York Law Journal and Super Lawyers.
Key practice areas
- Appellate
- Class action
- Commercial disputes
- Competition/antitrust
Website:nneuman@baretzbrunelle.com