John B. Manning

John B. Manning Partner

P 617 670 8800 F 617 670 8801
125 High Street
Oliver Street Tower, 6th Floor
Boston, MA 02110
125 High Street, Oliver Street Tower, 6th Floor, Boston, MA 02110

John B. Manning is a partner with MG+M in Boston, MA. He chairs the firm’s Complex Litigation Group, which maintains an active national presence from its 14 nationwide offices. John represents dozens of corporations in litigation throughout the country and serves on several clients’ National Trial Teams. As National Coordinating Counsel for multiple products manufacturers, he directs all aspects of the defense of more than 200,000 asbestos lawsuits pending in all 50 states. 

Bar Admissions
  • Massachusetts, 1991
  • U.S. District Court - District of Massachusetts, 1992
  • U.S. Court of Appeals - 1st Circuit, 1993
  • Rhode Island, 2003
  • U.S. District Court - District of Rhode Island, 2006
  • Suffolk University Law School, J.D. cum laude, 1991
  • Harvard University, B.A. cum laude, 1988

John concentrates his practice in products liability, toxic torts, asbestos defense, mass torts, litigation management, food liability, professional liability, pharmaceutical and medical device litigation, environmental litigation, class actions, intellectual property litigation, and commercial and insurance disputes. He has tried dozens of cases and has extensive experience in appellate practice, alternative dispute resolution, and national litigation management. 

John has served as an expert witness regarding issues in asbestos litigation. A frequent speaker and commentator on products liability litigation, he has Co-Chaired Perrin Conferences’ National Asbestos Litigation Conference annually since 2009. In addition, he has coordinated clients’ lobbying efforts in the U.S. House of Representatives and Senate to create national asbestos legislation.



  • Best Lawyers In America, Mass Tort Litigation and Class Actions for Defendants, 2013-2019
  • Martindale-Hubbell AV Rated Attorney
  • AM Best Insurance Recommended Attorney
  • Senior Fellow, Litigation Counsel of America
  • Massachusetts Super Lawyers


  • Big Brother Association of Greater Boston
  • American Heart Association
  • St. Jude Children's Research Hospital
News & Insights

Speaking Engagements

  • Co-Chair, “Perrin Conferences National Asbestos Litigation Conference,” 2009-2019
  • Speaker, Certified In-House CLE Presentation, “Products Liability Trial Demonstration,” 2011
  • Speaker, Certified In-House CLE Presentation, “Asbestos Trial Demonstration,” 2012
  • Speaker, Certified In-House CLE Presentation, “Asbestos Bankruptcy Update,” 2011
  • Speaker, DRI Asbestos Medicine Conference, “National Verdict Update and Analysis,” 2010
  • Speaker, DRI Asbestos Medicine Conference, “Asbestos Bankruptcy Update and Analysis,” 2009


  • The Equal Protection Clause and District Reapportionment: Representational Equality Versus Voting Equality, Suffolk University Law Review, Vol. 25, 1991, No. 2., 1991
  • Follow-Up Care Within Physicians' General Duty Owed to Patients, Suffolk University Law Review, Vol. 25, R. I. Survey 1991, No. 2
  • Statute of Frauds and Omission of Compensation Terms from Written Memorandum, Suffolk University Law Review, Vol. 25, R. I. Survey 1991, No.2, 1991


MG+M and Kurowski Shultz LLC Have Merged to Form One National Firm
The national litigation and trial firm now has 14 coast-to-coast offices and 120 attorneys
MG+M and Kurowski Shultz LLC to Join Forces as One National Litigation and Trial Firm
Combined litigation law firm to have 14 coast-to-coast offices and 105 attorneys
MG+M Partner John B. Manning Returns as Co-Chair of Perrin Conferences' National Asbestos Litigation Conference
2018 marks Manning's tenth consecutive year co-chairing the conference.
Best Lawyers in America
Martindale Hubbell AV Rating
Litigation Counsel of America - Senior Fellow
Super Lawyers
AM Best Recommended Insurance Attorney