Steven J. Pacini handles complex commercial disputes and litigation for clients ranging from emerging company founders to global market leading companies.

Mr. Pacini handles transaction-related litigation for emerging companies and private equity firms, with a focus on the life sciences and technology sectors. He also represents founders and individual investors. He represents clients in disputes related to a range of issues, including:

  • M&A agreements, commercial partnerships, preferred stock financings, and related equity arrangements
  • Rights and responsibilities under operating and partnership agreements (under both Massachusetts and Delaware law)
  • Post-closing purchase price adjustments
  • Milestone and earnout payments
  • Stock option agreements, executive departures, and other employment matters
  • Business torts, including unfair competition and defamation claims
  • Insurance recovery matters
  • Trade secrets and trademarks
  • Class actions

With a focus on actionable advice to avoid and efficiently resolve litigation, Mr. Pacini draws on insights gained from regularly handling litigation diligence for complex corporate transactions for Latham’s Boston office, and representing public companies in large-scale class actions and government investigations.

Mr. Pacini serves on the board of the Youth Advocacy Foundation and handles juvenile cases pro bono for The Public Defender Agency of Massachusetts.

Mr. Pacini’s experience includes representing:

Investors/Private Equity Firms

  • ABRY Partners
  • Boathouse Capital
  • Flagship Pioneering
  • Fortis Advisors
  • Great Hill Partners
  • Harvest Partners Structured Capital
  • H.I.G. Capital
  • Mintz Group
  • Old Ironsides Energy
  • Perella Weinberg Growth Equity
  • Westview Capital Partners

Emerging and Global Companies

  • Boston Scientific    
  • CCC Intelligent Solutions
  • Charles River Systems
  • Deutsche Bank Securities
  • Drizly
  • Hydrow
  • LogMeIn
  • Navistar
  • Philip Morris International
  • ReliaQuest
  • Seres Therapeutics
  • TB12

Bar Qualification

  • Massachusetts


  • JD, Boston University School of Law
    cum laude
  • BS, University of Connecticut
    summa cum laude