Atty. Sean Griffin
Sean Griffin is a partner in the litigation group in Langlois lawyers’ Montréal office and a member of the firm’s Board of Directors. His practice focuses on complex litigation involving constitutional, administrative and commercial law issues, as well as corporate and securities matters.
Profile Summary
About Sean Griffin at a glance
Sean Griffin is a business, class action, litigation, government, and appellate attorney, practicing at Langlois Lawyers LLP. They have 19+ years of legal experience, licensed to practice since 2007. Admitted to practice in Quebec, Barreau du Quebec (2007). Recognitions include Lawyer of the Year — Appellate Practice, Montréal (Canada) (2026), Best Lawyers in America — Administrative and Public Law (2026), and Best Lawyers in America — Appellate Practice (2026).
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About
- Sean Griffin is a partner in the litigation group in Langlois lawyers’ Montréal office and a member of the firm’s Board of Directors
- His practice focuses on complex litigation involving constitutional, administrative and commercial law issues, as well as corporate and securities matters
- With recognized expertise in defending public and private corporations, financial institutions and various entities active in the financial markets, including their directors and officers, Sean represents his clientele in a wide variety of civil and statutory proceedings, including class actions and regulatory investigations
- He also acts as strategic advisor to a number of clients on issues involving governance and regulatory compliance
- Sean appears before all levels of the courts, and also represents his clients in the context of regulatory investigations undertaken by authorities such as the Investment Industry Regulatory Organization of Canada (IIROC) and Quebec’s Autorité des marchés financiers (AMF)
- A sought-after conference speaker, Sean frequently gives presentations on current issues involving commercial litigation, managing complex litigation files and litigation risk, governance, class actions and regulatory and internal investigations
Practice Areas Explained
Sean Griffin's Areas of Practice
Each practice area below reflects the types of cases Sean Griffin 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.
Sean Griffin is one of 501,317 business attorneys indexed nationally. Browse business attorneys →
Sean Griffin is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys →
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Sean Griffin is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys →
Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.
Sean Griffin is one of 132,225 government attorneys indexed nationally. Browse government attorneys →
Appellate attorneys for civil and criminal appeals at state and federal court.
Sean Griffin is one of 86,319 appellate attorneys indexed nationally. Browse appellate attorneys →
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