Browse By Last Name
Mary K. Marks

Ms. Marks is counsel in Davis Polk’s Litigation Department. Her practice focuses on analyzing U.S. and multinational transactions and obtaining clearance under the Hart-Scott-Rodino Act and global merger control laws. She also counsels clients with respect to inadvertent failures to file under the HSR Act.

Of Note

  • Vice-Chair, Antitrust Section, M&A Committee, American Bar Association, 2013-present
  • Executive Committee Member, Section of Antitrust Law, New York State Bar Association, 2011-present
  • Appointed to serve on the Antitrust and Trade Regulation Committee, New York City Bar Association, 2016-2019
  • Moderator, "From Algeria to Zimbabwe: Competition in Africa," ABA Spring Meeting, April 8, 2016
  • Co-Author, U.S. Chapter, Getting the Deal Through – Merger Control, 2016, 2017 and 2018 editions
  • Panelist, “Integration Planning Today: In Bounds, Out of Bounds, and Close Calls,” ABA Seminar, February 23, 2015
  • Moderator, “Efficiencies, the Cheshire Cat of Merger Analysis,” NYSBA Annual Meeting, January 29, 2015
  • Moderator, “Navigating State and Federal Regulators During Your Merger,” NYSBA Annual Meeting, January 30, 2014
  • Panelist, “Antitrust Challenges in Hospital Mergers,” Strafford Webinar, October 2, 2012
  • Panelist, “HSR: 2011 Amendments to the Rules, Forms and Instructions,” Strafford Webinar, September 20, 2011
  • Author, “Premerger Reporting in Non-Merger Scenarios,” Law360, March 22, 2012

Professional History

  • Counsel, Davis Polk, 2015-present
  • Counsel, Greenberg Traurig, 2011-2015
  • Special Counsel, HSR and Merger Control, Schulte Roth & Zabel, 2004-2011
  • Associate, Schulte Roth & Zabel, 1995-2004
  • Associate, Pryor, Cashman, Sherman & Flynn, 1993-1995


  • 450 Lexington Avenue
    New York, NY
    P: +1 212 450 4016
    F: +1 212 450 5536

Bar Admissions

  • State of New York


  • B.B.A., Accounting and Philosophy, University of Notre Dame, 1990
    • magna cum laude
  • J.D., Georgetown University Law Center, 1993
    • Dean's List
    • Member, Georgetown Journal of Legal Ethics