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Marc O. Williams


Advises on mergers and acquisitions and private equity transactions across multiple industries. Also counsels clients on corporate governance and related matters.

Marc is a member of our Mergers & Acquisitions and Private Equity practices. He has a diverse and broad-based practice encompassing mergers and acquisitions, private equity transactions, joint ventures, collaborations and other corporate partnering transactions, restructurings and spinoffs. Multinational corporations turn to Marc with their most critical business initiatives and domestic and cross-border transactions. Marc also represents private equity firms and their portfolio companies.

He has handled matters across a variety of industries, with particular experience in healthcare, financial services, asset management, consumer products and retail, natural resources, and tech, media and telecom.

He also has an active practice in corporate governance and related matters.

Experience highlights

  • Roche’s acquisitions of Anadys, Flatiron Health, Foundation Medicine, InterMune, Marcadia, Memory Pharmaceuticals, Mirus Bio, Spark Therapeutics and Ventana Medical Systems
  • VF Corporation’s acquisitions of Timberland, Nautica, Icebreaker and Altra Footwear Brand; dispositions of its Nautica Brand business, Contemporary Brands Coalition and Licensed Sports Group; and spinoff of its Jeans and VF Outlet Businesses
  • Morgan Stanley’s acquisitions of E*TRADE, Eaton Vance and Solium Capital
  • Freeport-McMoRan’s acquisition of Phelps Dodge; its divestment and shareholder arrangements with Inalum relating to its Grasberg mine; and numerous other transactions
  • Comcast’s acquisition of NBCUniversal and numerous other transactions
  • Emerson’s acquisitions of Avocent and Pentair’s Valves & Control business; dispositions of its Network Power, ClosetMaid, LANDesk and motors businesses; and numerous other transactions
  • Tyson Foods’ acquisitions of AdvancePierre Foods, Keystone Foods and Hillshire Brands and sale of its poultry businesses in Mexico and Brazil
  • BDT Capital Partners' acquisition of Culligan
  • HSN’s acquisition by Liberty Interactive
  • CSX's settlement with Mantle Ridge and its simultaneous hiring of a new CEO
  • ConAgra's separation into two independent public companies, sale of its private label operations to Treehouse Foods, acquisition of Ralcorp and its cooperation agreement with JANA Partners
  • AstraZeneca’s acquisition of ZS Pharma
  • Santander’s acquisition of GE Capital's Mexican mortgage business and ING's Mexican mortgage business
  • Western Refining's acquisition by Tesoro Petroleum
  • Belmond in its successful defense against an unsolicited offer from Indian Hotels
  • Citi’s disposition of its commercial real estate loan portfolio through various transactions
  • Old Lane’s sale to Citigroup
  • Aetna’s acquisition of Schaller Anderson
  • FirstGroup’s acquisition of Laidlaw International
  • Texas Instruments’ sale of its Sensors & Controls business to Bain Capital
  • Argosy Gaming’s acquisition by Penn National
  • FedEx’s acquisition of Kinko’s
View all experience



IFLR1000 – M&A, United States, Highly regarded

Law360 – “Rising Star: M&A," 2013

J.D., Harvard Law School
  • magna cum laude
B.A., Amherst College
  • magna cum laude
Professional history
  • Partner, 2006-present
  • Associate, 1998-2006
Qualifications and admissions
  • State of New York
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