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ARTICLE · 23 OCTOBER 2026

Merger Review In Canada: What Businesses Should Know

Canadian merger review requirements can trigger early in a transaction and may apply even when deals fall below pre-closing notification thresholds. This overview examines critical considerations including financial thresholds, substantive competition concerns, clearance processes, timing requirements, filing fees, and how Competition Act risk is typically addressed in transaction documentation.

CanadaAntitrust/Competition Law
Issue Considerations
What is a merger? A merger is broadly defined. The Competition Act defines a merger to mean the acquisition, direct or indirect, whether by purchase or lease of shares or assets, by amalgamation or any other combination, of control over or significant interest in the whole or a part of a business of a competitor, supplier, customer or other person.
When do you need to have a merger approved? Early in the transaction process: a proposed merger involving an operating business in Canada is subject to a pre-closing notification requirement to the Commissioner of Competition under the Competition Act where specified financial thresholds are exceeded.
What are the main financial thresholds?

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