Peter L. Welsh




  • JD, cum laude, The University of Chicago Law School, 1999
  • MA, Boston College, 1996
  • AB, The University of Chicago, 1991


  • New York, 2015
  • Massachusetts, 1999

Court Admissions

  • U.S. Court of Appeals for the First Circuit
  • U.S. District Court for the District of Massachusetts
  • Chairman, Directors and Officers Liability Litigation Committee of the American Bar Association 
  • Member, ABA Business Law Section’s Task Force on Director and Officer Liability and Indemnification
  • Chairman, Directors and Officers Liability Litigation Committee of the American Bar Association
  • Member, ABA Business Law Section’s Task Force on Director and Officer Liability and Indemnification
  • Financial Times “U.S. Innovative Lawyer" (2012)
  • Massachusetts Super Lawyers (2014-2015)
  • Massachusetts Super Lawyers - Rising Stars (2005-2009)

Peter L. Welsh


Peter focuses his practice on the areas of transactional and securities litigation as well as government enforcement, corporate governance, and director and officer representations. Known for guiding directors and officers as well as buyout, hedge, and venture capital firms through difficult situations, Peter regularly represents such clients in litigation, pre-litigation, and regulatory investigations. 

An experienced litigator, Peter has litigated contested merger transactions, including strategic, financial, and going private transactions, complex securities and corporate litigation matters, including the representation of the directors and officers of several public companies in securities class actions and breach of fiduciary duty actions. Peter has also handled a range of regulatory investigations, including investigations by the Securities and Exchange Commission, Department of Justice, and a number of state governments. 

A trusted counselor, Peter advises boards of directors and board committees on mergers and acquisitions and other strategic alternatives, as well as related-party transactions, internal investigations, and litigation. Peter also regularly advises private equity, hedge fund, and mutual fund clients on indemnification and general partner liability insurance matters.


  • Special Committee of Cole Credit Property Trust II (“CCPT II”): Part of deal and litigation team which advised the special committee of CCPT II in $7.1 billion merger with Spirit Realty Capital, creating the second largest publically traded triple-net-lease REIT in the United States.
  • OTK Associates, LLC: Part of litigation team representing OTK Associates, LLC in shareholder litigation against Morgans Hotel Group before the Delaware Court of Chancery. Successfully secured an injunction for our client, a significant shareholder of Morgans, requiring the Company to reinstate a record date and annual meeting date and prohibiting the Company from moving forward with a strategic transaction until approved pursuant to a proper process.
  • Lehman Brothers: Represented several financial institutions in litigation, mediation and contested negotiations in the Lehman Brothers bankruptcy proceedings, including swap collateral disputes and other complex matters.
  • Special Committee of Affiliated Computer Services: Part of deal and trial team that successfully represented the Special Committee of Affiliated Computer Services in the $6 billion acquisition of ACS by Xerox Corporation. Successfully represented Special Committee in numerous shareholder actions in Delaware and Texas.
  • Major University Endowments: Lead litigation counsel in litigation in California and Delaware involving a real estate joint venture and a real estate project recapitalization. Orchestrated a litigation strategy across multiple jurisdictions that achieved a very favorable settlement for our client.
  • Large international investment company: Successfully represented a large international investment company in shareholder litigation arising out of the bankruptcy of one of its portfolio companies within weeks of making a $10 million investment. Recovered 87.5% of the investment in the portfolio company.
  • BioForm Medical: Successfully represented BioForm in shareholder litigation in California arising out of the acquisition of BioForm by Merz, GMBH. Successfully opposed a motion for preliminary injunction and merger closed.
  • Keurig Green Mountain: Successfully represented Keurig Green Mountain in shareholder litigation arising out of the acquisition of Diedrich Coffee. Succeeded in opposing plaintiffs’ motion for expedited discovery allowing transaction to close on schedule.
  • M&A Advice: Advise numerous private equity sponsors and public and private companies concerning fiduciary duties and transaction process in financial and strategic transactions.
  • Director and Officer and General Partnership Liability Insurance Advice: Part of nationally-recognized practice advising dozens of private equity sponsors, hedge fund and mutual fund complexes, and public and private companies on their professional liability and transactional risk insurance coverage and contractual indemnification protections.
  • Genzyme Corporation: Represented Genzyme before the First Circuit involving a coverage dispute with its directors and officers liability insurer, Federal Insurance Company. In the action, Genzyme sought to recover the amount of a shareholder class action settlement arising from the cancellation of the company’s tracking stock in a share exchange. The district court initially dismissed the action, but the First Circuit reversed the dismissal of Genzyme’s complaint against Federal and remanded the action to the district court for an award of damages in Genzyme’s favor.



  • Moderator, “Current CFTC Enforcement Issues – A Discussion with CFTC Director of Enforcement David Meister,” Washington D.C. Bar, Washington, D.C. (July 2011)
  • Panelist, “Corporate Developments Arising Out of the Financial Crisis,” Northwestern Law’s 48th Annual Corporate Counsel Institute, Chicago (October 2009)
  • Co-chair, “Shareholder Liability: Piercing the Corporate Veil and Beyond,” Massachusetts Continuing Legal Education, (May 2009)
  • Panelist, “Hedge Funds and the Credit Crisis: Pricing, Modeling and Valuation Impacts,” Joint Ropes & Gray and Deloitte Client Conference, New York (April 2008)