Current Role
  • Associate, Hagens Berman Sobol Shapiro LLP
  • Mr. Polonsky’s practice focuses on pharmaceutical antitrust litigation.
Recent Success
  • In In re Amitiza Antitrust Litigation, 21-cv-11057, D. Mass., (Joun, J.) Mr. Polonsky served as a member of the trial team that secured a $474.89 million antitrust jury verdict (automatically trebled to $1.4 billion) for the direct purchaser class, against Takeda Pharmaceuticals for unlawfully extending its monopoly on Amitiza by blocking lower-cost generic competitors from entering the market. This is the first plaintiffs’ verdict in a “reverse payment” or “pay-for-delay” case.
Experience
  • Prior to joining Hagens Berman, Mr. Polonsky served as a law clerk for Justice Dalila Argaez Wendlandt of the Massachusetts Supreme Judicial Court and Judge Patti B. Saris of the U.S. District Court for the District of Massachusetts.
  • While completing his legal studies, Mr. Polonsky represented clients at various stages of disability benefits appeals as a clinical student in the Safety Net Project of the Legal Services Center of Harvard Law School. One of his clients received a fully favorable decision on the record.
  • Mr. Polonsky worked as a summer law intern for the American Civil Liberties Union of Massachusetts, conducting legal research for ongoing litigation regarding mass incarceration and immigration.
  • As a clinical intern for the Civil Rights Division of the Office of the Attorney General for the Commonwealth of Massachusetts, Mr. Polonsky worked on housing discrimination litigation and researched case law on administrative exhaustion.
  • At the Constitutional Accountability Center, Mr. Polonsky worked as a summer law intern, researching and writing on litigation topics including statutory interpretation and legislative intent in civil rights suits, along with standing and jurisdiction issues.
  • Prior to law school, Mr. Polonsky worked at a non-profit college-prep program, helping high school students from underserved communities using a law-based curriculum.
Recognition
  • Member of the In re Amitiza Antitrust Litigation trial team honored with the Outstanding Antitrust Litigation Achievement in Private Law Practice award, American Antitrust Institute, Antitrust Enforcement Awards, 2026
Clerkships
  • Justice Dalila Argaez Wendlandt, Massachusetts Supreme Judicial Court, 2022-2023
  • Judge Patti B. Saris, U.S. District Court for the District of Massachusetts, 2021-2022
Publications
  • “Equal Protection Through State Constitutional Amendment,” 56 Harvard Civil Rights-Civil Liberties Law Review 413, 2021
Personal Insight

Daniel grew up in New York State, and has found his home in Massachusetts. Outside of work, he goes to the theater whenever he can, and spends the rest of his time cooking new gluten-free recipes with his wife, reading his daughter books about dinosaurs, and rewarding their cats’ requests for playtime.