Skip to main content

Mark Kingsley represents clients in a variety of business transactions, with a particular emphasis on mergers and acquisitions, joint ventures and other public and private equity and debt investments on behalf of public and private companies, private equity funds, and other investors. As part of his M&A practice, Mr. Kingsley represents buyers and sellers of both healthy and financially-distressed businesses. His clients invest in a broad range of industries, including aerospace and defense, government contractors, and life sciences.

Mr. Kingsley has significant experience in capital restructurings, including debt-to-equity conversions, both in and outside of bankruptcy proceedings. He has also represented clients in capital-raising transactions, including public and private debt and equity offerings.

He also advises public and private companies of various sizes on day-to-day general corporate and governance matters.


  • Strategic Materials, Inc., one of North America’s largest glass recyclers, in its sale to Sibelco, the European leader in glass recycling.
  • American Securities, a private equity firm with more than US$27 billion in assets under management, in its sale of Milk Specialties Global, a leader in human and animal nutrition, to Butterfly, a California-based private equity firm.
  • GardaWorld Federal Services, a provider of security, medical, logistics, and mission support to U.S. Federal, State, and Local Government and commercial customers, in its acquisition of Ellipse Global, a leading provider of rapid response, full‐service, turn‐key mobile base camps and mobile catering services throughout the United States and Canada.
  • Borden Dairy Company, the iconic dairy processor, in connection with the sale of substantially all of its assets through a 363 sale in Chapter 11, in a transaction valued at approximately $340 million.
  • Onex Corporation, a private equity firm with approximately US$50 billion in assets under management, in several transactions, including:
    • the sale of Carestream Health Inc.’s digital dental imaging business to funds managed by Clayton Dubilier & Rice and CareCapital Advisors; and
    • its acquisition of Boeing’s commercial aerostructures production facilities in Kansas and Oklahoma for $1.2 billion, forming Spirit AeroSystems.
  • The Beekman Group, a private equity firm and one of the largest franchisee networks in the Dunkin’ Brands system, in several acquisitions and dispositions of Dunkin’ franchises.
  • American Securities in its acquisition and subsequent sale of specialty paper coating and finishing company FiberMark Inc. to Neenah Paper Inc., a leading global specialty materials company.
  • Charles B. Wang in his three-stage sale of the New York Islanders Hockey Club to an investor group led by Scott Malkin and Jon Ledecky.
  • Spirit AeroSystems, Inc. in the sale of its Gulfstream wing work packages and related assets at Spirit's Tulsa, Oklahoma facility, to Triumph Group, Inc.
  • BioTime, Inc., a developer of new products in the field of regenerative medicine utilizing stem cells, in its acquisition of stem cell assets from Geron Corporation, a biotechnology company, forming Asterias BioTherapeutics.
  • Bank of America in the two-part sale, along with a co-investor, of a combined 53% stake in Archstone, an apartment REIT, to Lehman Brothers Holdings Inc., totaling $2.9 billion.



  • J.D., University of Pennsylvania Carey Law School, 1991
  • B.S., The Wharton School, The University of Pennsylvania, 1988, cum laude


  • New York