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How Corporate Amalgamation Works in Ontario Under the OBCA

Amalgamation lets two Ontario corporations combine into one under the OBCA. Here’s how the process generally works and how it differs from a sale.

Corporate5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • Amalgamation is a statutory process: two or more existing corporations combine to form one amalgamated corporation, which then holds all the assets, rights, obligations, and liabilities…
  • Common reasons owners and their lawyers reach for amalgamation include: - Simplifying a group of affiliated corporations into one entity to reduce ongoing administration (fewer minute…
  • The directors of each amalgamating corporation approve an amalgamation agreement setting out how shares will be exchanged and what the amalgamated corporation’s articles will look like.

When people talk about two companies "merging," they often mean something different than what Ontario corporate law actually calls a merger. Amalgamation is the specific legal process under the Business Corporations Act (OBCA) for combining two or more corporations into a single amalgamated corporation. It’s not a sale, and it’s not the same as a corporation simply moving to a new jurisdiction. Understanding the difference matters, because amalgamation carries every predecessor corporation’s liabilities forward automatically — there’s no cherry-picking.

This article explains what amalgamation actually does, the general steps involved, and how it compares to the other ways businesses combine.

What Amalgamation Actually Means

Amalgamation is a statutory process: two or more existing corporations combine to form one amalgamated corporation, which then holds all the assets, rights, obligations, and liabilities that each predecessor corporation had immediately before combining. Legally, it’s treated as a continuation of each predecessor, not a purchase of one corporation by another and not a liquidation. This matters practically — unlike a share purchase, there’s no negotiating which liabilities transfer and which stay behind; everything comes along by operation of law.

Why Businesses Amalgamate

Common reasons owners and their lawyers reach for amalgamation include:

The General OBCA Process

  1. The corporations agree on terms. The directors of each amalgamating corporation approve an amalgamation agreement setting out how shares will be exchanged and what the amalgamated corporation’s articles will look like.
  2. Shareholders approve it. Each corporation’s shareholders must approve the amalgamation by the higher voting threshold the OBCA requires for a fundamental change like this — not simply a majority vote at a regular meeting.
  3. Articles of Amalgamation are filed with Ontario’s corporate registry.
  4. A certificate of amalgamation is issued, and the amalgamated corporation legally comes into existence at that point, combining the predecessors into one.
  5. Everything carries forward automatically — assets, contracts, ongoing legal proceedings, and liabilities of each predecessor become those of the amalgamated corporation without needing to be individually reassigned, the way they would in an asset sale.

The OBCA also allows a simplified process for amalgamating a parent corporation with one or more of its own wholly owned subsidiaries, which is generally more straightforward than amalgamating two unrelated corporations — a useful option for owners simply trying to collapse a group structure rather than combine separate businesses.

Amalgamation vs. Your Other Options

OptionWhat HappensTypically Used For
AmalgamationTwo or more corporations become one; all liabilities carry forwardCombining affiliated corporations or merging related businesses
ContinuanceOne corporation changes its jurisdiction of incorporation (e.g., from federal to Ontario)Moving where a corporation is incorporated, not combining entities
Share or asset purchaseOne business acquires another’s shares or assetsAcquiring an unrelated business — a separate topic from Corporate structuring, covered under Mergers & Acquisitions
DissolutionA corporation formally winds up and ceases to existEnding a corporation with no successor entity

What to Check Before You Amalgamate

Because liabilities carry over completely and unconditionally, amalgamation doesn’t offer the kind of "clean start" a carefully negotiated share purchase agreement might, with its representations, warranties, and indemnities. Before amalgamating, it’s worth reviewing:

Frequently asked questions

Does every amalgamating corporation’s shareholders need to approve it?

Yes — each corporation involved generally needs its own shareholders to approve the amalgamation by the special voting threshold the OBCA sets for fundamental changes, not just an ordinary majority vote.

Is amalgamation the same thing as one company buying another?

No. In an amalgamation, the corporations combine into a single new legal entity by operation of law. In a purchase, one corporation continues to exist and simply acquires another’s shares or assets — a different transaction with different consequences.

Do employment contracts need to be redone after an amalgamation?

Not automatically. Because the amalgamated corporation is treated as a continuation of each predecessor, existing contracts — including employment contracts — generally continue rather than terminating, though it’s worth confirming this for your specific situation.

Can a small, dormant corporation just be amalgamated into an active one instead of dissolved?

Yes, this is a common use of amalgamation for smaller corporate groups, and it can be simpler than a formal dissolution in some cases. Both routes are available, and which one fits depends on your specific structure and goals.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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