• Share
  • Email
  • Print

John C. Blessington

Fax +1.617.261.3175
Mr. Blessington is an experienced trial lawyer who has successfully tried cases in state and federal courts, including many bet the company cases. He has had success at every phase of litigation. He has represented small businesses as well as Fortune 100 companies in complex business disputes. His clients include multinational banking and financial services companies, investment advisory firms, bio-pharma companies, software companies, sovereigns, municipalities and construction firms. His cases include business, securities and loan fraud, class action, intellectual property, construction and land use disputes. In addition to his extensive and varied trial experience, Mr. Blessington has arbitrated disputes before the American Arbitration Association, the Japan Commercial Arbitration Association, FINRA and the International Institute for Conflict Prevention & Resolution, among other organizations. He has also handled appeals, including before the First Circuit Court of Appeals, and has successfully mediated many cases.

Professional Background

Mr. Blessington has been a lawyer with K&L Gates since 1993 and a partner since 1998.


Mr. Blessington is currently listed in The Best Lawyers in America in the field of Commercial Litigation and has been listed as a Massachusetts Super Lawyer. In 2009, he was the recipient of the Volunteer Lawyers for the Arts, S. Jeanne Hall Pro Bono Award for outstanding contribution to the arts community.

Additional Information

Mr. Blessington is admitted in all state and federal courts of Massachusetts and by pro hac vice to various federal and state courts throughout the United States.
  • Defended company in a $30 million lawsuit brought in federal court by a competitor over claims of stealing trade secrets and trademark infringement. After a three week trial, the jury zeroed out plaintiff and awarded the company damages for plaintiff’s abuse of process.

  • Defended life sciences company against a $13.5 million claim over the improper conduct of a Phase II clinical trial and breach of related licensing agreement. Following a two week arbitration, the tribunal zeroed out plaintiff and awarded the company damages and a return of its intellectual property.

  • Represented plaintiff in a breach of fiduciary duty claim over the valuation of partnership interests in a reinsurance company. Won $6 million jury verdict.

  • Acted as coordinating counsel for the Republic of Ecuador and their Central Bank in a case before British Commonwealth Courts involving claims of fraud against a prominent Ecuadorian banking family. The 20 year case culminated with a 2015 ruling by the Judicial Committee of Her Majesty’s Privy Council in London that overturned concurrent verdicts against the Republic from a Bahamian trial and appeals court. The Privy Council entered judgment in favor of the Republic in the amount of $191 million that with interest now totals over $600 million. 

  • Defended international bio-pharma company and its officers in two separate federal securities fraud class actions alleging that the company had deceived investors about the commercial prospects of two of its leading drug candidates. Won dismissal of both actions.

  • Defended investment adviser in the multidistrict litigation captioned In re Mutual Funds Investment Litigation. Won dismissal of claims against adviser early in the case.

  • Represented software supplier in claim for breach of licensing agreement. Won summary judgment awarding full licensing fee.

  • Represented investment advisory firm in a multi-million dollar claim against its D&O carrier for failing to provide coverage. Won summary judgment on interpretation of key policy language that resulted in a settlement.

  • Defended indenture trustee against a $9 million breach of fiduciary duty claim brought by minority bondholders over the sale of an asset out of bankruptcy.  Successfully settled the case for the trustee on the eve of trial.

  • Represented paper manufacturing company in a multi-million dollar breach of contract case. Successfully settled case for plaintiff on the second day of trial.

  • Represented seller in a $1.4 billion busted deal litigation. Buyer attempted to rescind its merger agreement and seller counterclaimed seeking specific performance. After expedited discovery and the close of buyer’s case in Delaware Chancery Court, the parties settled for a slightly reduced merger price.

  • Defended lender in a lawsuit arising from a $14.6 million loan in connection with a commercial development. Won dismissal of all claims against lender in Delaware Chancery Court.

  • Represented manufacturing facility in an eminent domain case. Won a jury award doubling amount awarded by taking authority.

  • Represented the Massachusetts Turnpike Authority (“MTA”) against the construction manager, design consultants and contractors of the Big Dig project in Boston in a case arising out of the collapse of the I-90 Tunnel. Obtained a favorable settlement for the MTA.

  • Represented the MTA in criminal and NTSB investigations of fraud and other offenses resulting from the Big Dig ceiling collapse.

  • Represented State Farm Fire & Casualty Company and State Farm General Insurance Company in connection with collecting from the United States approximately $50 million in subrogation claims associated with the Cerro Grande fire that occurred on or about May 4, 2000 in northern New Mexico.

  • Represented property owners in five separate land damage cases arising out of the Worcester Redevelopment Authority’s takings to make way for the Medical City development in Worcester. Settled all five cases with favorable results for clients.

  • Represented Fortune 200 company in an arbitration arising from a licensing dispute before the American Arbitration Association and the Japan Commercial Arbitration Association. Successfully settled arbitration for claimant.