Marc O. Williams
  1. Partner

Mr. Williams is a partner in Davis Polk’s Corporate Department, concentrating in mergers and acquisitions, private equity transactions, corporate governance and related matters.

Work 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:
    • acquisition of E*TRADE
    • acquisition of Solium Capital
  • Tyson Foods’ acquisitions of AdvancePierre Foods, Keystone Foods and Hillshire Brands and sale of its poultry businesses in Mexico and Brazil
  • 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
  • First Data's formation of a new joint venture with FleetCor
  • AstraZeneca’s acquisition of ZS Pharma
  • Santander’s acquisition of GE Capital's Mexican mortgage business and ING's Mexican mortgage business
  • Freeport-McMoRan’s acquisition of Phelps Dodge, its dispositions of its TF Holdings and Candelaria/Ojos mining interests and an ownership interest in Morenci Mine and various other transactions
  • Comcast’s acquisition of NBCUniversal
  • Emerson’s:
    • Acquisition of Avocent
    • Dispositions of its Network Power, ClosetMaid, LANDesk and motors businesses
    • Acquisition of Pentair’s Valves & Control business
    • Acquisition of Paradigm
  • Roche’s unsolicited (and ultimately successful) acquisition of Ventana Medical Systems
  • Roche’s acquisitions of Anadys, InterMune, Memory Pharmaceuticals, Mirus Bio and Marcadia and its majority investment in Foundation Medicine
  • 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
  • Numerous transactions for Comcast, including an investment in a new public company formed by the combination of the high-speed wireless businesses of Sprint Nextel and Clearwire
  • 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


Mr. Williams is consistently recognized as a leader in the legal industry:
  • Law360 – “Rising Star" in M&A, 2013 
  • Chambers USA 2016 – Corporate/M&A: The Elite: New York 
  • The AmLaw Daily 2012 – “Dealmaker of the Week” 

He is also recognized as a leading lawyer in IFLR1000.

Professional History

  • Partner, 2006-present
  • Associate, 1998-2006

Bar Admissions

  • State of New York


  • B.A., Amherst College, 1995
    • magna cum laude
  • J.D., Harvard Law School, 1998
    • magna cum laude