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Clifford Chance

Clifford Chance
Joseph Ostoyich

Joseph Ostoyich


Joseph Ostoyich

Joe Ostoyich is the head of Clifford Chance’s US Antitrust Litigation practice. He has been lead counsel in dozens of bet-the-company class action and individual price fixing, monopolization, merger challenges and other antitrust matters, and his trial prowess has earned him recognition for “excellence among American litigation and trial counsel.”

  • Representing Caterpillar Inc. in a lawsuit alleging the company conspired with a competitor and its own dealers to boycott the distributor of a foreign supplier seeking to enter the United States.
  • Representing Energy Transfer L.P. in a case alleging major oil producers, refiners, pipelines, and an industry-wide trade association conspired to raise the price of oil and gasoline.
  • Representing JSW Steel’s U.S. subsidiaries in a group boycott action against its leading competitors.
  • Representing a client in a non-public government investigation in the food and beverage industry into pricing conduct.
  • Lead trial counsel for Patterson Companies, Inc.* in a Part 3 administrative trial brought by the FTC and four related “follow-on” federal court cases accusing the company of conspiring with its primary rivals to fix prices and boycott ‘buying groups’. His team won dismissal of two putative class actions, favorable settlements in two separate competitor boycott cases, and resolved the FTC lawsuit following an 8-week trial, with no monetary penalty or independent monitor.
  • Represented AT&T and its top executives* in obtaining dismissal of private challenge to its merger with Time Warner, Inc. that was affirmed on appeal to the Ninth Circuit.
  • Defended a Fortune 50 client* in a complex DOJ investigation into conspiracy to boycott emerging technologies which the DOJ closed with no enforcement action.
  • Defended a Fortune 150 company* in a DOJ investigation into an alleged ‘no poach’ cartel which resulted in the DOJ closing its investigation with no enforcement action.
  • Represented leading spirits provider* in obtaining voluntary dismissal on the eve of non-public administrative trial brought by Alcohol & Tobacco Tax and Trade Bureau alleging it excluded rivals.
  • Lead trial counsel for Respondent McWane, Inc.* in two-month “Part 3” trial against the Federal Trade Commission alleging price fixing and monopolization. The Commission dismissed six of its seven counts and subsequently closed multiple related investigations with no enforcement action.
  • Obtained summary judgment for ExxonMobil Corporation* in district court in Washington, D.C. in a case accusing the company and its primary competitors of conspiring to fix the price of natural gas. The D.C. Circuit affirmed.
  • Represented Eaton Corporation* and received a final judgment of zero-dollar damages and an order excluding the opposing damages expert as “insufficient and unreliable” in a monopolization case claiming several billion dollars in damages. In follow-on customer litigation, the court denied certification of putative classes of direct and indirect purchasers based, in part, on Mr. Ostoyich deposition of plaintiffs’ class certification expert.

*Prior to joining Clifford Chance

News and client work

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Contact details

Career and qualifications

  • Cornell University (B.A) 1988
  • University of Chicago Law School (J.D) 1991
  • Admitted as an Attorney-at-Law in New York 1992
  • Admitted as an Attorney-at-Law in Washington D.C 1993
  • Joined Clifford Chance as a partner 2023

Awards and citations

  • "He really knows his way around an antitrust case."
    Chambers USA 2023: Antitrust: Litigation Specialists (10 years ranked)
  • Joe Ostoyich has to be the best-qualified competition law attorney we have ever worked with. He has spent countless hours over the years learning our business and it shows in the quality of the advice he provides.” “The consummate consigliere in terms of client service" and "an outstanding trial lawyer," with "excellent recall, in-depth knowledge and exceptionally good judgment," he is "one of the best antitrust counsellors, a “very effective and strong strategist,” who can “distill matters clearly and is an incredible advocate.Chambers USA and The Legal 500 (2017-2022)
  • Fellow, Litigation Counsel of America (inducted 2022)
  • One of ten lawyers nominated as Litigator of the Year
    Global Competition Review (2020)
  • BTI Client All-Star (2019)
  • Awarded Behavioural Matter of the Year: Americas
    Global Competition Review (2015)
  • Named a “Legal Lion” along with his trial team – Law360’s Weekly Verdict
    Legal Lions & Lambs (2014)
  • Highly ranked in Martindale-Hubbard (4.9/5.0 ranking)
  • Selected to Super Lawyers (Washington, D.C.) for 2013 – 2023