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.
In addition to his pathbreaking current matters—including serving as lead counsel in a major antitrust class action against a hospital network in Wisconsin—Greg has scored several key victories recently that have changed the legal landscape. For example, on behalf of former New York Governor Andrew Cuomo, Greg successfully argued a constitutional separation-of-powers challenge to the New York Commission on Ethics and Lobbying in Government (COELIG), which had charged the former governor with ethics violations related to a deal for a book about his efforts in the Covid-19 pandemic. He prevailed in September 2023 in New York Supreme Court, which declared that the Act creating COELIG was unconstitutional, and obtained a unanimous decision from the Appellate Division, Third Department on May 9, 2024, affirming the trial court.
As the lead lawyer for the online video platform Rumble, Greg scored dismissals of two putative class actions alleging Rumble violated the Video Privacy Protection Act by disclosing to Facebook its subscribers’ personal information.
In another high-profile matter that attracted media attention, Greg scored total victories for the National Basketball Association at the district court and the U.S. Court of Appeals for the Sixth Circuit in a lawsuit by an aspiring agent accusing the league of antitrust violations. The court agreed with Greg’s position that the NBA’s only relevant activity in the case—collectively bargaining with its union—is exempt from antitrust law. Greg followed up with another win for the NBA in the U.S. District Court for the Western District of Tennessee in a case raising RICO and trademark infringement issues.
Greg also played a major role on an HSG team that tried a $700 million antitrust case against Rupert Murdoch’s News Corp. He oversaw the damages component of the case, in which HSG represented a company controlled by the legendary investor Ron Perelman that competed in the valuable market for “in-store promotions.” HSG’s client, Valassis Communications, claimed that News Corp. had unlawfully maintained a monopoly. Greg played a pivotal role in defeating News Corp.’s motion for summary judgment. As part of overseeing the damages component, Greg deposed News Corp.’s damages expert. After a three-week jury trial, the case settled for nine figures during jury deliberations.
Greg co-authored an amicus brief on behalf of a bipartisan group of state legislators that Supreme Court Justice Elena Kagan quoted in her concurring opinion in Gill v. Whitford, the challenge to partisan gerrymandering in Wisconsin. He also submitted an amicus brief to the Supreme Court on behalf of a bipartisan group of 10 U.S. senators in support of American victims of terrorist attacks concerning the proper interpretation of the Antiterrorism Act. SCOTUSblog invoked Greg and his team’s amicus brief on behalf of the Brennan Center for Justice in Benisek v. Lamone as an example of a “top” amicus brief. And in a major partisan gerrymandering case in New York, a justice of the Appellate Division invoked an amicus brief Greg co-authored for the League of Women Voters of New York State; the New York Court of Appeals agreed with that analysis in ruling that the legislature’s process for enacting redistricting maps violated the state constitution.
Greg has argued cases in the First, Second, Ninth, and D.C. Circuits, the Connecticut Supreme Court, the New York Supreme Court and Appellate Division, the U.S. District Court for the Southern District of New York, the U.S. District Court for the Northern District of Ohio, and in arbitration. He has also been appointed by the U.S. Courts of Appeals for both the First Circuit and the D.C. Circuit to argue and brief cases raising constitutional questions. Greg has an active pro bono practice, in which recent victories include securing asylum for an Afghan national who served with U.S. forces and was threatened by the Taliban and winning the first-ever successful bail motion for a civil immigration detainee in the Second Circuit.
He was named to the 2023 and 2024 Lawdragon 500 X – The Next Generation lists and Benchmark Litigation’s 40 & Under List since 2022, and has been recognized as a Rising Star by the New York Law Journal (2021) and by Super Lawyers since 2020.
Key Practice Areas:
- Antitrust
- Appellate
- Business & Commercial
- Civil Litigation
- Class Action
Year Joined Firm: 2017
Education: Yale Law School (J.D.); Wesleyan University (B.A.)
Updated July 2024
