Abbye Klamann Ognibene

Abbye Klamann Ognibene


Hagens Berman Sobol Shapiro LLP

Recognized since 2024

Boston, Massachusetts

Practice Areas

Antitrust Law

Litigation - Antitrust

Mass Tort Litigation / Class Actions - Plaintiffs

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Ms. Ognibene believes in taking on corporations in the fight for plaintiffs' rights, including the right to online privacy and to fair pricing in medical care and consumer goods.

CURRENT ROLE

  • Partner, Hagens Berman Sobol Shapiro LLP
  • Practice focuses on fair pricing for pharmaceuticals, catastrophic personal injury and product recalls, healthcare fraud, and antitrust enforcement
  • Court appointed interim lead class counsel in CareFirst of Maryland, Inc. et al. v. Johnson & Johnson et al., a class-action lawsuit representing health benefit providers, accusing Johnson & Johnson of unlawfully delaying the release of biosimilar medications that could compete with its autoimmune medication, Stelara
  • Second chair in six-week federal antitrust trial, In re HIV Antitrust Litigation, concerning anticompetitive pricing for HIV medication
  • Helped launch Boston office Pro Bono Program
  • Member of HBSS team representing purchasers in In re Actos Antitrust Litigation, In re Vascepa Antitrust Litigation, and In re Intuniv Antitrust Litigation
  • Represents parents in personal injury and wrongful death cases concerning Fisher-Price’s recalled Rock ‘n Play sleepers
  • Secured a successful Second Circuit order upholding the trial court’s denial of defendants’ motion to dismiss in In re Actos

EXPERIENCE

  • Prior to joining Hagens Berman, Ms. Ognibene was an associate at a start-up litigation boutique, where she helped launch a plaintiffs' class-action practice group.
  • She also worked on cutting-edge class-action litigation at Lieff Cabraser Heimann & Bernstein, focusing on digital privacy and antitrust cases.
  • While in law school, Abbye worked for more than two years as a law clerk to the legal team of DeBoer v. Snyder, consolidated sub nom. Obergefell v. Hodges, which guaranteed the nationwide right to marry for same-sex couples.

Contact & Links
Location
  • 1 Faneuil Hall Square, 5th Floor
    Boston, MA 02109
Education
  • The University of Michigan Law School, J.D., graduated 2016

Recognized in Best Lawyers: Ones to Watch® in America 2026 for work in:
  • Antitrust Law
  • Litigation - Antitrust
  • Mass Tort Litigation / Class Actions - Plaintiffs
Awards:
  • Massachusetts Chapter Member, National Lawyers Guild

  • Panelist, "Working with Experts and Expert Witness Testimony - Do's & Don'ts," ABA Spring Litigation Meeting (2024)

Publications

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