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J. Caleigh Macdonald


Caleigh’s work focuses on complex antitrust litigation and competition law. His prior work experience involved various commercial and civil matters, including defamation & media defense, privacy, unfair competition, false claims cases, transportation law, land use and real property litigation. In his spare time, he volunteers as a pro bono attorney representing low-income tenants in unlawful detainer actions at the California Superior Court in San Mateo County.

While in law school, Caleigh was a French-speaking member of the UBC Law team at the bilingual Laskin Constitutional Law Moot competition, and routinely represented indigent clients in criminal and civil matters with the Law Students’ Legal Advice Program.


Caleigh represents direct purchasers and end payers in complex antitrust litigation and competition matters.

Practice Areas


University of British Columbia School of Law, J.D., 2012

King’s College London, M.P.P., with distinction, 2008

Simon Fraser University, B.G.S., Dean’s Honour Roll, 2006

Bar Admissions


British Columbia

US District Court for the Southern District of California

Affiliations & Memberships

American Bar Association (Antitrust, Privacy and Data Security)

California Lawyers Association (Antitrust, Unfair Competition and Privacy)