Does every corporation need a shareholders agreement?

Not strictly. Many one-founder corporations don't have one. But any corporation with multiple shareholders should have one — without it, default statutory rules apply, which often don't fit. Investors will require one as a condition of investment.

What's the difference between a CBCA USA and a regular shareholders agreement?

A CBCA USA, signed by all shareholders, can statutorily restrict the directors' powers (CBCA s. 146). A regular shareholders agreement is purely contractual and can't override the directors' statutory duties. The USA is unique to Canadian corporate law.

Can a shareholders agreement be amended?

Yes, but the amendment process is itself governed by the agreement. Often requires unanimous consent (for USAs) or supermajority for less restrictive agreements. Read the amendment provision carefully.

Governance & rights

Shareholders agreement

Contract among shareholders (and often the company) governing rights, restrictions, and exit mechanics.

Definition

A shareholders agreement is a contract among the shareholders of a corporation (and typically the corporation itself) that governs the relationship: voting rights, share transfer restrictions, drag-along and tag-along rights, board composition, ROFR, deadlock resolution, and exit mechanics. In Canada, the 'unanimous shareholders agreement' (USA) can also restrict the powers of directors.

Same concept, different names

Canada (CBCA)	Unanimous shareholders agreement (s. 146)
Quebec (LSA-Qc)	Convention unanime des actionnaires (art. 213-215)
Delaware (DGCL)	Stockholders agreement (no specific statute, contract-based)
UK	Shareholders' agreement (contract-based)

USA as a CBCA innovation

The Canadian 'unanimous shareholders agreement' is a hybrid contract-statutory instrument: when signed by all shareholders, it can restrict or transfer powers that would normally belong to the board of directors. This is unusual and powerful — it lets shareholders contractually carve out areas where they (not the directors) make decisions.

Typical USA provisions: who serves on the board, what decisions require unanimous shareholder approval, share transfer mechanics, valuation methods, exit/buyout triggers
USA must be signed by ALL shareholders (the 'unanimous' part) to have its powers-shifting effect. A near-unanimous agreement is just a contract, not a USA
USA travels with the shares — any new shareholder must sign on. Without unanimous consent, the USA dissolves into a regular shareholders agreement

Common provisions across jurisdictions

Whether structured as a USA, a stockholders agreement, or an investor rights agreement, the typical provisions are:

Board composition and voting on board appointments
Share transfer restrictions (ROFR, ROFO, tag-along, drag-along)
Pre-emptive rights and pro-rata rights
Information and inspection rights
Valuation mechanism for departures/repurchases
Deadlock resolution (mediation, arbitration, buy-sell)
Non-compete, non-solicit, and confidentiality covenants

In Octelligence

Shareholders agreement linked to the register.

Octelligence attaches the unanimous shareholders agreement (or stockholders agreement) at the corporation level, with each shareholder flagged as a signatory or bound party. Restrictions flow through to transfer workflows automatically.

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Cap table, registers, certificates

Track every investor right at the share level.

Pro-rata, ROFR, drag-along, MFN, registration rights. Recorded against the share, surfaced when relevant.

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Shareholders agreement

USA as a CBCA innovation

Common provisions across jurisdictions

Related terms