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William Primps is Of Counsel in the firm’s Commercial Litigation practice focused on antitrust, energy, construction and insurance. Bill is fully certified as a New York state mediator pursuant to Rule 146, and is a member of the American Arbitration Association’s Roster of Commercial Arbitrators.

Bill is a highly-experienced litigator with a practice focused on antitrust, energy and insurance. The first decade of his practice included large federal court cases relating to the impact of Nuclear Regulatory Commission rules on the construction of nuclear plants in New York. More recently, he has represented Canada’s largest state-owned utility company in an international arbitration determining whether design and construction defects allowed rescission of a multi-year, multi-billion dollar contract. He represented a Tokyo-based insurer in post 9/11 litigation in various courts and ADR tribunals around the U.S., winning seven and eight-figure recoveries on behalf of his clients. Since 2010, he has served as counsel to the North American CRO Council, a trade association with a membership including virtually all the largest P/C and life insurer in North America; during that time he also has represented major financial institutions and Fortune 500 companies. From 2013-2015, he represented an architect-engineer in an international construction arbitration concerning a clean coal generating facility in Pennsylvania. This arbitration included a mediation in which a $41 million settlement was arranged among the parties’ various insurers. More recently, he has served as a mediator in various matters pending in New York courts.

Practice Areas



  • New York
  • U.S. Supreme Court
  • U.S. Court of Appeals for the Second Circuit and Various Other Federal Courts


  • J.D., Harvard Law School, 1974
  • B.A., Yale University, cum laude, High Honors in Major, 1971

Professional and Community Activities

  • Member, The Association of the Bar of the City of New York
  • Member, New York State Bar Association
  • Member, American Bar Association
  • Board of Directors, Atlantic Legal Foundation Advisory Council
  • Chairman, Bronxville Zoning Board of Appeals, 1989-1991
  • Trustee, Village of Bronxville, 1991-1998, Deputy Mayor 1996-1998
  • Counsel, Bronxville Board of Ethics, 2004-2018
  • Vice President, Bronxville School Foundation, 2002-2005
  • President, Ivy Football Association
  • Villiage Justice, Justice Court of Bronxville, 2018-Present
  • Special Master, Appellate Division First Department’s Pre-argument Conference Program, 2022-Present

Speaking Engagements

  • Moderator, Tokyo Panel on Return of Ill-Gotten Gains, NYS Bar Association, November 8, 2019
  • Speaker, Meeting of National Conference of Insurance Commissioners, “CTE Legal and Insurance Issues,” July 11, 2019
  • Speaker, Annual Meeting of Casualty Actuarial Society, Las Vegas, “CTE Insurance Issues,” November, 2018
  • Speaker, Association of the Bar of the City of New York, “Problem Deals”
  • Speaker, Harvard Law School Panel, International Arbitration
  • Speaker, Harvard Law School Panel on Energy Investments in Russia

Honors and Awards

  • Super Lawyers, Top Rated Antitrust Litigation Attorney in New York, NY, 2013-Present

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