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Wolf Greenfield Ranked Among Top Law Firms for Contested Matters and Patent Prosecution in Legal 500 United States 2026

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Wolf Greenfield has been recognized in the Legal 500 United States 2026 rankings, earning national recognition in the categories of “Patents: litigation (International Trade Commission)” and “Patents: prosecution (including reexamination and post-grant proceedings).” Five attorneys were also individually recognized for their work across ITC litigation, patent prosecution, and post-grant proceedings.

What Legal 500 Says

Legal 500 recognized Wolf Greenfield’s work across all levels of patent litigation, from state and federal forums to ITC investigations. The directory also singled out the firm’s “particular expertise in the life sciences sector,” advising major corporations, start-ups, and research institutions.

What Clients Are Saying

Client feedback highlighted:

  • “Their technical understanding of new material innovations is impressive and incredibly valuable as it shortens the ‘translation’ time from lab notebooks to patent language and stronger claims.”
  • “They are exceptionally bright, excited about innovative ideas, and highly organized.”
  • “We have consistently been impressed by the quality of their advice, responsiveness, and commercial awareness.”
  • “They are proactive in identifying risks and opportunities, including enforcement considerations and portfolio optimization, and they communicate these points in a way that is accessible even to non-US practitioners.”

Individually Ranked Attorneys

Five attorneys earned individual rankings:

  • Libbie DiMarco, Head, ITC Practice – Leading Partner
  • Heather DiPietrantonio, Shareholder, Biotechnology Practice – Next Generation Partner
  • Rich Giunta, Shareholder, Post-Grant Proceedings Practice – Leading Partner
  • Oona Johnstone, Chair, Prosecution & Counseling Department – Next Generation Partner
  • Patrick Waller, Chair, Biotechnology Practice – Leading Partner

About Legal 500

Legal 500 assesses the strengths of law firms in over 100 countries worldwide. The rankings highlight the practice area teams who are providing the most cutting-edge and innovative advice to corporate counsel. The research is based on feedback from over 300,000 clients, submissions from law firms, and interviews with leading private practice lawyers. Legal 500 is the only source of this depth of global research and data on law firms, lawyers, and their clients.
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