Department profile
Cleary Gottlieb Steen & Hamilton LLP

Competition/Antitrust

Global Guide 2026 : USA


Cleary Gottlieb Steen & Hamilton LLP

Rankings

Chambers Review

Provided by Chambers

Competition/Antitrust - USA

Band 1

Band 1


What the Team is Known For

Long-term, concerted international expansion from its US base has enabled Cleary Gottlieb to become one of the most globally recognised brands in numerous areas of international law. The law firm's broad office network incorporates established teams stationed across key financial and political centres in the USA, Europe, South-East Asia, the Middle East and Latin America.

Cleary Gottlieb is recognised as a distinguished antitrust firm which provides a robust global platform, combining deep roots in the Washington DC market with renowned competition teams across Europe, and is particularly noted for its strength in Brussels. The US antitrust team demonstrates international coordination and project management capabilities within its own network as well as with parties from multiple jurisdictions. The team is regularly sought out for its corporate expertise on merger control issues as well as defending clients against cartel allegations. Cleary Gottlieb is a top choice for major US clients from the technology, financial services and automotive industries requiring transatlantic expertise.

Strengths

Provided by Chambers

  • The team are very practical in how they take the law and apply it to the matter at hand.

    Competition/Antitrust respondentGlobal
  • The team have very deep knowledge of the merger process.

    Competition/Antitrust respondentGlobal

Notable Practitioners

Provided by Chambers

  • Band 1Heather Nyong'o
    Band 1Heather Nyong'o

    Heather Nyong'o

    Heather Nyong'o acts for a wide array of clients in the oil and gas, technology and pharmaceutical spheres in both civil and criminal investigations.
    • Heather is a really good cartel lawyer.

      Competition/Antitrust respondentGlobal
  • Band 2Jeremy Calsyn
    Band 2Jeremy Calsyn

    Jeremy Calsyn

    Jeremy Calsyn is accomplished in criminal antitrust litigation, particularly cases concerning price-fixing investigations. He is well known for his work on behalf of automotive parts suppliers.
  • USA, expertise based abroad in BelgiumChristopher Cook
    USA, expertise based abroad in BelgiumChristopher Cook

    Christopher Cook

    Brussels-based Christopher Cook remains a popular choice for international and US antitrust advice. He is also admitted to the Washington, DC Bar.
  • Foreign expert for ChinaCunzhen Huang
    Foreign expert for ChinaCunzhen Huang

    Cunzhen Huang

    Cunzhen Huang is well-versed in handling an array of antitrust matters on behalf of a variety of clients in the China region.

  • Foreign expert for BelgiumMark Leddy
    Foreign expert for BelgiumMark Leddy

    Mark Leddy

    Mark Leddy is commended for his representation of a broad array of prominent clients in competition disputes. His previous DOJ experience bolsters his ability to handle cartel investigations.Mark Leddy is commended for his representation of a broad array of prominent clients in competition disputes. His previous DOJ experience bolsters his ability to handle cartel investigations.
  • USA, expertise based abroad in BelgiumPatrick Bock
    USA, expertise based abroad in BelgiumPatrick Bock

    Patrick Bock

    Admitted to both the DC and Illinois Bars, Patrick Bock is a stellar choice for US antitrust disputes. He advises clients from the firm's Brussels office.

Ranked Individuals at Cleary Gottlieb Steen & Hamilton LLP (6)

USA

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