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Jeremy Calsyn
Lawyers profile
USA 2025
Lawyers profile | USA 2025: Antitrust: Cartel, Antitrust
Jeremy Calsyn
Ranked in 2 Practice Areas
2

Band 2

Antitrust: Cartel

USA - Nationwide

12 Years Ranked

3

Band 3

Antitrust

District of Columbia

15 Years Ranked

Ranked in Guides
Global 2025

About

Provided by Jeremy Calsyn

USA

Practice Areas

Jeremy Calsyn’s practice focuses on the full range of antitrust matters. Jeremy has represented clients in their most high-profile and sophisticated matters, including mergers and acquisitions requiring regulatory approval in dozens of jurisdictions, numerous global and U.S.-focused cartel investigations, and in litigation in federal, state and administrative courts. He was co-lead trial counsel to Juul Labs in defeating the FTC’s challenge of Altria’s investment in Juul Labs. He is counsel to Pinnacle in the RealPage class action litigation, is handling numerous merger investigations, and is representing clients in several confidential cartel investigations.

Career

Joined Cleary in 1999; became partner in 2008; J.D., magna cum laude, Georgetown University Law Center (1999); B.S., summa cum laude, Southwest Missouri State University (1995); Law clerk, Judge Louis F. Oberdorfer of the U.S. District Court for the District of Columbia (2000-2001).

Professional Memberships

Member, California and District of Columbia Bars.

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Antitrust: Cartel - USA - Nationwide

2
Band 2
Individual Editorial
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.
Learn more about this team❖View ranking table

Antitrust - District of Columbia

3
Band 3
Individual Editorial

Jeremy Calsyn is well known in the market for his representation of multinational companies in antitrust litigation and merger proceedings. He is particularly expert in defense of price-fixing allegations.

Learn more about this team❖View ranking table

Strengths

Provided by Chambers

Jeremy is smart, responsive and collaborative.

Antitrust respondent
Chambers Guide to the USA

Jeremy is knowledgeable about the business and industry which is invaluable when providing advice.

Antitrust respondent
Chambers Guide to the USA

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