Atty. Nadia Campion
Nadia is engaged in the most complex and demanding files across multiple disciplines including commercial disputes, shareholder oppression applications, director and officer liability, estates and trusts litigation, class actions, and professional liability. Nadia is adept at providing cogent and strategic advice that seamlessly aligns with her clients’ business goals.
Profile Summary
About Nadia Campion at a glance
Nadia Campion is a business, real estate, class action, securities, and litigation attorney based in Mississauga, Ontario, practicing at Lax O'Sullivan Lisus Gottlieb LLP. Recognitions include Best Lawyers in America — Class Action Litigation (2026), Best Lawyers in America — Corporate and Commercial Litigation (2026), and Best Lawyers in America — Director and Officer Liability Practice (2026). Serands clients in Mississauga, ON and the surrounding metropolitan area.
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About
- Nadia is engaged in the most complex and demanding files across multiple disciplines including commercial disputes, shareholder oppression applications, director and officer liability, estates and trusts litigation, class actions, and professional liability
- Nadia is adept at providing cogent and strategic advice that seamlessly aligns with her clients’ business goals
- Fluent in English and French, Nadia also represents clients from Quebec
- Nadia has deep industry knowledge and extensive experience in trials, arbitrations and administrative hearings before the Superior Court of Justice and the Ontario Court of Appeal, as well as the Ontario Securities Commission, and the Investment Industry Regulatory Organization of Canada
- She has particular expertise in Toronto Commercial List proceedings
- She has specific expertise in the fields of corporate and shareholder disputes, corporate fraud, and real estate litigation
- Nadia is a frequent speaker, writer, and commentator for the Law Society of Ontario, the Ontario Bar Association, the Advocates’ Society, and the Cambridge Forum on Class Actions
- She is also one of four members of the Class Proceedings Committee, which is part of the Law Foundation, appointed by the Attorney-General of Ontario
Practice Areas Explained
Nadia Campion's Areas of Practice
Each practice area below reflects the types of cases Nadia Campion handles, with a brief overview of what that area of law covers.
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Nadia Campion is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Ontario →
Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.
Nadia Campion is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in Ontario →
Nadia Campion is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in Ontario →
Nadia Campion is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in Ontario →
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Nadia Campion is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Ontario →
Jurisdictional Context
Why local counsel matters in Ontario
Practicing law in Ontario. Legal matters in Ontario are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Mississauga are typically filed in the local municipal court or the appropriate Ontario state district court, depending on subject matter and amount in controversy. An attorney licensed in Ontario brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Ontario courts without local counsel or pro hac vice admission.
Looking for additional Ontario attorneys? Browse all attorneys in Mississauga or all attorneys in Ontario.
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