Matthew Piehl advises clients on all antitrust aspects of transactions, from the earliest stages of deal planning through post-closing advice and compliance.

Matthew represents major international corporations, private equity funds, and other businesses spanning industries and geographies across the full transactional life cycle, including in:

  • Global merger control filings
  • Regulatory review by the US Department of Justice and the Federal Trade Commission
  • Transaction negotiations and deal diligence
  • Closing and post-closing antitrust matters
  • Government investigations and transaction-related civil litigation

He helps clients obtain regulatory approval of mergers and acquisitions as well as other transactions from competition authorities in the United States and around the world. For US-focused transactions with international dimensions, Matthew leads the global merger-control filing process, coordinating with colleagues in Brussels, London, and other jurisdictions to provide consistent and comprehensive representation across jurisdictions.

Matthew is an active member of the American Bar Association’s Antitrust Section, where he previously served as the Young Lawyer Representative to the Trade, Sports, and Professional Associations and the Mergers & Acquisitions Committees. He also serves as an adjunct lecturer at the University of Minnesota Law School. In addition, Matthew is the Chair Emeritus of the Minnesota State Bar Association’s Antitrust Section.

Matthew’s experience includes advising:

  • AMD on the antitrust aspects of its US$8.2 billion acquisition of World Labs
  • Antin Infrastructure Partners on the antitrust aspects of acquiring Vigor Marine Group
  • Arclight Capital and its portfolio company Gulf Oil on the antitrust considerations for its sale of five refined product terminals in the Northeast to Global Partners
  • Capitol Meridian Partners on the antitrust aspects of its investment in RH Aero Systems
  • Carlyle on the antitrust aspects of:
    • Selling Copia Power to EQT
    • Acquiring Camino Natural Resources with Diversified Energy
  • CoStar Group on global antitrust considerations for its acquisition of a 3D modeling and digital home tour company
  • The Farmer’s Dog on the antitrust aspects of acquiring Woof
  • Fubo on the antitrust aspects of its combination with Disney’s Hulu + Live TV
  • Global Infrastructure Partners on selling a controlling stake in EnLink Midstream to ONEOK; awarded Oil & Gas Deal of the Year, North America, at the IJGlobal Investor Americas Awards 2025
  • Hg on the antitrust aspects of its US$500 million investment in Rightsline
  • IAC on the antitrust aspects of selling Care.com, a global website for connecting households with caregivers, to Pacific Avenue Capital Partners
  • Informatica on the antitrust aspects of its US$8 billion acquisition by Salesforce
  • Just Energy, a retail energy provider in specializing electricity and natural gas commodities, on its sale to IGS Energy
  • The Knot Worldwide on its agreement to add Zola to its global brand portfolio
  • Morgan Stanley Capital Partners on the antitrust aspects of acquiring The Rapid Group
  • Permira on the antitrust aspects of its US$2.4 billion sale of BioCatch to Visa
  • TruckPro, a Platinum Equity subsidiary and distributor of heavy-duty truck and trailer products, on its merger with FleetPride
  • Viasat, a global satellite operator and service provider, on obtaining global antitrust and foreign investment approvals for its US$7.3 billion acquisition of Inmarsat
  • United States Sugar on the antitrust aspects of acquiring Imperial Sugar Company, a producer of refined sugar products and food ingredients
  • Vistra, a leading energy company, on the antitrust aspects of its US$6.7 billion acquisition of Energy Harbor, a deal which makes Vistra a leading nuclear plant operator in the US

Bar Qualification

  • District of Columbia
  • Minnesota

Education

  • JD, University of Virginia School of Law, 2011
  • BS in Biology, Duke University, 2008
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July 26, 2023 Recognition

Litigator of the Week Runners-Up and Shout Outs

Latham team recognized as appellate court affirms previous decisions against the US Department of Justice's challenge to U.S. Sugar's purchase of Imperial Sugar.