When Shareholder Agreements Override the OBCA — And When They Don't
Shareholder agreements can customize how your corporation works, but they can't override everything in the OBCA. Here's what you can change, what you can't, and why it matters.

Shareholder agreements are powerful tools that can customize how an Ontario corporation operates. However, they cannot override everything in the Ontario Business Corporations Act (OBCA). This article explains when shareholder agreements can override the OBCA and when they cannot.
The General Principle
Shareholder agreements are contracts between shareholders that can modify certain default rules in the OBCA. However, the OBCA contains both:
- Default rules that can be overridden by agreement
- Mandatory provisions that cannot be overridden
Understanding the difference is crucial for both drafting and interpreting shareholder agreements.
What Shareholder Agreements Can Override
Default Shareholder Rights
Many shareholder rights in the OBCA are defaults that can be modified by agreement, including:
- Voting rights (subject to certain limitations)
- Rights to receive dividends
- Rights to receive information
- Rights to transfer shares
- Procedures for shareholder meetings
Default Director Powers
Shareholder agreements can restrict or modify director powers, including:
- Decision-making authority
- Powers to issue shares
- Powers to declare dividends
- Powers to enter into contracts
Corporate Governance Procedures
Shareholder agreements can establish procedures for:
- Calling meetings
- Quorum requirements
- Voting procedures
- Dispute resolution
What Shareholder Agreements Cannot Override
Mandatory Statutory Rights
The OBCA contains certain rights that are mandatory and cannot be overridden, including:
The Right to Oppression Remedy
Shareholders always have the right to seek an oppression remedy under the OBCA, regardless of what a shareholder agreement says. This is a fundamental protection that cannot be waived.
Basic Corporate Existence
Shareholder agreements cannot override fundamental requirements for corporate existence, such as:
- The requirement to have at least one director
- The requirement to have at least one shareholder
- Basic corporate formalities
Fiduciary Duties
Directors’ fiduciary duties to the corporation cannot be eliminated by shareholder agreement, though the agreement may affect how those duties are exercised.
Public Policy Limitations
Some provisions cannot be overridden because they would violate public policy, such as:
- Provisions that would allow illegal activities
- Provisions that would harm creditors
- Provisions that would circumvent regulatory requirements
Unanimous Shareholder Agreements (USAs)
A unanimous shareholder agreement (USA) is a special type of shareholder agreement that can transfer powers from directors to shareholders. However, even USAs have limits:
What USAs Can Do
USAs can:
- Restrict the powers of directors
- Transfer decision-making authority to shareholders
- Modify corporate governance structures
What USAs Cannot Do
USAs cannot:
- Eliminate all director duties
- Override mandatory statutory rights (like the oppression remedy)
- Violate public policy
- Eliminate fundamental corporate requirements
Common Scenarios
Scenario 1: Share Transfer Restrictions
Can a shareholder agreement restrict share transfers? Yes. Shareholder agreements commonly restrict share transfers, requiring consent or offering rights of first refusal. These restrictions are generally enforceable.
Scenario 2: Removing Director Powers
Can a shareholder agreement remove all director powers? Partially. A USA can restrict director powers and transfer them to shareholders, but some basic requirements remain.
Scenario 3: Waiving the Oppression Remedy
Can a shareholder agreement waive the right to seek an oppression remedy? No. This is a mandatory statutory right that cannot be waived.
Scenario 4: Modifying Voting Rights
Can a shareholder agreement modify voting rights? Generally yes, but there are limits. For example, certain fundamental decisions may require specific voting procedures that cannot be completely eliminated.
Drafting Considerations
Be Specific
Vague shareholder agreements can lead to disputes. Be specific about:
- What is being modified
- How it’s being modified
- What happens if the agreement conflicts with the OBCA
Consider Unanimous Shareholder Agreements
If you want to significantly modify corporate governance, consider whether a USA is appropriate. USAs have special legal status and can transfer powers from directors to shareholders.
Include Conflict Clauses
Include clauses that address what happens if the agreement conflicts with the OBCA or corporate articles. Generally, the agreement should specify that it prevails to the extent permitted by law.
Plan for Disputes
Include dispute resolution mechanisms, but remember that parties always retain the right to seek an oppression remedy, regardless of what the agreement says.
Common Pitfalls
Assuming Everything Can Be Overridden
Many people assume shareholder agreements can override everything in the OBCA, but this is not true. Mandatory provisions always apply.
Not Understanding USA Requirements
USAs have specific requirements (they must be unanimous, must be in writing, etc.). Failing to meet these requirements can invalidate the agreement.
Conflicting with Articles of Incorporation
Shareholder agreements should be consistent with the articles of incorporation. Conflicts can create uncertainty and legal problems.
Not Updating the Agreement
As the corporation grows and changes, the shareholder agreement may need to be updated. Outdated agreements can cause problems.
Key Takeaways
- Shareholder agreements can override many default OBCA provisions but not mandatory ones
- The oppression remedy is a mandatory right that cannot be waived
- Unanimous shareholder agreements have special status and can transfer powers from directors to shareholders
- Public policy limits what can be overridden
- Specific, well-drafted agreements are more likely to be enforceable
Related Content
- Corporate & Business Law in Ontario
- Case Study: Alex — Shareholder Dispute Despite an Agreement
- ISC Register: What Ontario Corporations Need to Know About Shareholder Information Requirements
This article is for informational purposes only and does not constitute legal advice. Every situation is unique, and the information here may not apply to your specific circumstances. For advice tailored to your situation, consult with a qualified legal professional licensed to practice law in Ontario.
Disclaimer: This article is for informational purposes only and does not constitute legal advice. For advice specific to your situation, please contact us for a consultation.