Jeremy Calsyn

Ranked in 2 Practice Areas

Band 2

Antitrust: Cartel

USA - Nationwide

11 Years Ranked

Band 3

Antitrust

District of Columbia

14 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

USA

Antitrust: Cartel - USA - Nationwide

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.

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Antitrust - District of Columbia

Band 3

Individual Editorial

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

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Strengths

Provided by Chambers

"Jeremy Calsyn is an expert not only in antitrust but how to navigate matters with regulators and other parties."

Antitrust: Cartel respondent
USA

"Jeremy is a true subject matter expert. He is practical and business-oriented."

Antitrust: Cartel respondent
USA

"Jeremy Calsyn is an expert not only in antitrust but how to navigate matters with regulators and other parties."

Antitrust respondent
USA

"Jeremy is a true subject matter expert. He is practical and business-oriented."

Antitrust respondent
USA

"Jeremy Calsyn is an expert not only in antitrust but how to navigate matters with regulators and other parties."

Antitrust: Cartel respondent
USA

"Jeremy is a true subject matter expert. He is practical and business-oriented."

Antitrust: Cartel respondent
USA

"Jeremy Calsyn is an expert not only in antitrust but how to navigate matters with regulators and other parties."

Antitrust respondent
USA

"Jeremy is a true subject matter expert. He is practical and business-oriented."

Antitrust respondent
USA

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California

Antitrust

Heather Nyong'o

Band 1

Jeremy Calsyn

USA Guide 2024

Antitrust: Cartel + 1 more ranking

About

Practice Areas

Career

Professional Memberships

Chambers Review

USA

Antitrust: Cartel - USA - Nationwide

Individual Editorial

Antitrust - District of Columbia

Individual Editorial

Strengths

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California

California: San Francisco, Silicon Valley & Surro

District of Columbia

New York

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