Andrew Lacy

Simpson Thacher & Bartlett LLP

Andrew M. Lacy is a Partner in the Washington, D.C. office whose practice focuses on antitrust-related litigation, transactional and counseling issues. Andrew represents clients in Department of Justice and Federal Trade Commission merger investigations and in criminal and civil government antitrust investigations.

He has litigated numerous antitrust matters involving monopolization, price fixing and other restraint of trade allegations and has appeared in trials and hearings before federal and state courts and international arbitration tribunals.

Andrew is recognized by The Legal 500 U.S. and as a “Future Star” by Euromoney’s Benchmark Litigation. He has been a core member of the group recognized as the Antitrust Department of the Year by Chambers USA in 2016 and the Antitrust Litigation Department of the Year by The American Lawyer in 2014.  Recent key matters on which Andrew has worked include:

  • BMW and Daimler in their proposed mobility services joint venture
  • MassMutual in its proposed sale of Oppenheimer Funds to Invesco
  • Taiyo Nippon Sanso and Matheson in their proposed acquisitions of divested Linde/Praxair assets
  • Maple Leaf Foods in its acquisition of Field Roast Grain Meat Company
  • Rolls-Royce Holdings plc in its acquisition of the Industria de Turbo Propulsores SA, a leading aerospace component manufacturer
  • Siliconware Precision Industries Co., Ltd., in the FTC approval of its merger with Taiwanese competitor Advanced Semiconductor Engineering, Inc.
  • Office Depot in obtaining FTC clearance of its merger with Office Max
  • and in obtaining dismissal of antitrust class action claims involving the online travel industry
  • CSL in direct and indirect purchaser class actions alleging collusion in the plasma-derived therapies industry
  • Mitsubishi Tanabe Pharma Co., achieving a significant victory in an international arbitration involving three separate arbitration hearings

Andrew joined the Firm in 2003 and became Partner in 2014.  He was one of the founding members of the Firm’s Washington, D.C. office. He received his J.D. from Georgetown University Law Center in 2002, where he was Managing Editor of the Journal on Law and Policy in International Business, and received his B.A. in Economics and International Studies from American University in 1997.


  • Georgetown University Law Center, 2002 J.D.
    • Law and Policy in International Business, Managing Editor
  • American University, 1997 B.A.


  • District of Columbia 2006
  • New York 2003
  • U.S. Supreme Court 2007
  • U.S. Court of Appeals for the District of Columbia Circuit 2006
  • U.S. Court of Appeals 2nd Circuit 2007
  • U.S. District Court Southern District of New York 2003
  • U.S. District Court Eastern District of New York 2003
  • U.S. District Court for the District of Columbia  2006


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Simpson Thacher & Bartlett LLP can handle cases related to laws concerning Litigation, Antitrust & Trade. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
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Simpson Thacher & Bartlett LLP
900 G St NW, Washington, DC 20001, USA
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