Department profile
Clifford Chance LLP

Antitrust

USA Guide 2026 : District of Columbia

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Clifford Chance LLP

Rankings

Chambers Review

Provided by Chambers

Antitrust - District of Columbia

Band 4

What the Team is Known For
Clifford Chance LLP has a noteworthy group, offering clients antitrust expertise across both contentious and noncontentious matters. Adeptly handles class action litigation and investigations, and has particular expertise in merger control matters. Clients benefit from attorneys' former experience at the DOJ and FTC.
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Work Highlights

Provided by Chambers

  • Clifford Chance US LLP advised Charter Communications on the antitrust aspects of its $34.5 billion acquisition of Cox Communications.

Strengths

Provided by Chambers

  • The team provides sophisticated, practical guidance on complex competition issues. The lawyers are exceptional antitrust advisors who are deeply knowledgeable, commercially minded and highly reliable.

    Antitrust respondentUSA

  • Clifford has an extraordinary and deep team of antitrust experts with strong relationships and excellent client management skills.

    Antitrust respondentUSA

  • Clifford Chance can advise and have significant experience in almost every jurisdiction with competition laws. They are able to quickly synthesize sophisticated issues in a timely manner.

    Antitrust respondentUSA

  • Clifford Chance mobilize large teams of attorneys to tackle the most complicated transactions. They have extensive experience in all major jurisdictions and will bend over backwards to ensure our needs are met.

    Antitrust respondentUSA

  • They can handle anything antitrust-related from compliance, training, to some of the most complex litigation in the country.

    Antitrust respondentUSA

Notable Practitioners

Provided by Chambers

  • Sharis Pozen
    Sharis Pozen

    Sharis Pozen

    Sharis Pozen brings a wealth of governmental experience to her antitrust practice, having held positions in both the FTC and DOJ. She provides antitrust compliance advice and manages the merger clearance process, including counseling on multijurisdictional merger investigations.

    • Sharis explained the overall process well, took the time to understand the relevant facts and developed very useful relationships.

      Antitrust respondentUSA

    • Sharis consistently delivered high-value sophisticated advice with common sense and political awareness.

      Antitrust respondentUSA
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  • Joseph A Ostoyich
    Joseph A Ostoyich

    Joseph A Ostoyich

    Joseph Ostoyich is well known for his work acting for clients in significant antitrust disputes often involving monopolization and price-fixing allegations.

    • Joe is our go-to antitrust expert.

      Antitrust respondentUSA
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  • Leigh Oliver
    Leigh Oliver

    Leigh Oliver

    Leigh Oliver is particularly commended for her work in healthcare-related antitrust matters. She regularly appears before the FTC in merger investigations and challenges.

    • Leigh breaks the mold. She has brilliant, amazing client service and gets right to the heart of the matter.

      Antitrust respondentUSA

    • Leigh is a strong strategist and a clear thinker. She has very good judgment and thorough preparation.

      Antitrust respondentUSA

    • In addition to being super smart and responsive, Leigh is a really terrific manager of complex matters.

      Antitrust respondentUSA

    • Leigh has a deep healthcare interest in antitrust that is incredibly useful.

      Antitrust respondentUSA
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  • Peter Mucchetti
    Peter Mucchetti

    Peter Mucchetti

    Peter Mucchetti is commended for his work securing transactional clearance before US and EU competition agencies. He also turns his hand to antitrust litigation for clients, particularly in the technology sector.

    • Peter provided sophisticated advice with a strong practical bent.

      Antitrust respondentUSA

    • Peter is the calmest and most considered person in most rooms. We deeply value his thoughtful and incisive advice and his ability to cut through to the things that are most important to our business.

      Antitrust respondentUSA

    • Peter is knowledgeable, eager to assist and pragmatic when problem-solving.

      Antitrust respondentUSA
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Ranked Individuals at Clifford Chance LLP (4)

District of Columbia

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