Unanimous Shareholder Agreements in Ontario: Shifting Director Powers Under the OBCA

Most business owners have heard of a shareholder agreement — the private contract that governs relationships among co-owners of a corporation. Fewer have heard of a unanimous shareholder agreement (USA), which is a specific legal category with unique powers and consequences under the Ontario Business Corporations Act (OBCA).

The key difference is profound: a USA can transfer powers that the OBCA otherwise reserves exclusively for the board of directors directly to the shareholders. For the right business structure, this is a powerful tool. Used incorrectly, it creates unexpected personal liability for shareholders who thought they were passive investors.

The OBCA's Default Power Structure

Under the OBCA, a corporation's business and affairs are managed — or supervised — by its board of directors. Directors owe fiduciary duties to the corporation. They make major strategic decisions, oversee the officers who run the business, and are accountable to the shareholders through the annual meeting process.

Shareholders, by contrast, generally do not manage the business. They elect directors, vote on fundamental changes (like amalgamations or the sale of all assets), and may remove directors — but they do not typically have the power to direct day-to-day or even strategic decision-making.

This default structure works well for publicly traded corporations with diffuse ownership and professional management. For a small, owner-operated business where all of the shareholders are also deeply involved in the operation, it may be artificial and limiting.

What a Unanimous Shareholder Agreement Does

The OBCA expressly provides that all shareholders can, by written agreement, restrict or remove the powers of the directors and assume those powers themselves. When such an agreement is signed by every shareholder at the time, it qualifies as a unanimous shareholder agreement and has special legal standing.

A USA can be used to:

• Require all shareholders to approve decisions that would otherwise be made by the board alone (capital allocation, hiring senior executives, signing major contracts)
• Directly restrict the board's ability to make certain decisions without shareholder consent
• Transfer specific director powers entirely to the shareholders, eliminating the need for formal board approval in those areas
• Set governance rules that go further than a standard shareholder agreement could achieve

Importantly, the shareholders who assume director powers under a USA also take on the duties and liabilities of directors with respect to those assumed powers. This is the quid pro quo: more control means more responsibility.

USA vs. Standard Shareholder Agreement: Key Differences

The last two points deserve emphasis. A USA must be noted on every share certificate (or on the register if uncertificated shares are used), and a transferee of shares takes those shares subject to the USA, whether or not they read it. This makes the USA "run with the shares" in a way that a standard shareholder agreement does not.

When Would You Want a USA?

Investors or Passive Shareholders Who Want Real Control

A passive investor who wants meaningful control over the use of their funds — beyond just voting on fundamental changes — may want a USA that requires their consent for specific director-level decisions (taking on debt above a threshold, entering into a new line of business, issuing new shares). Without a USA, the shareholders' ability to restrict the directors on these matters is limited.

Sole Shareholder Corporations

In many small holding corporations or professional corporations, there is only one shareholder, who is also the sole director. In this context, a USA signed by the single shareholder is often used to confirm that all powers are exercised by that person in their capacity as a shareholder, simplifying the corporate record-keeping. There is no meaningful governance tension to resolve, but the USA provides structural clarity.

Franchise or Joint-Venture Structures

Joint ventures involving multiple parties with different interests sometimes use a USA to establish very specific rules about who can commit the joint-venture corporation to certain actions, protecting each party's investment by ensuring they retain a voice on matters within their domain.

Lender Requirements

Some institutional lenders require a USA as a condition of financing, ensuring that the shareholder level has formally restricted the directors from taking certain actions — like granting additional security or paying unauthorized dividends — without lender approval.

When a USA May Be Unnecessary (or Counterproductive)

If your only goal is to give shareholders a veto on major decisions, you may be able to achieve this through a well-drafted standard shareholder agreement combined with careful drafting of the corporation's by-laws. The USA is a more powerful — and more consequential — tool.

The shareholder liability issue is real. If a USA gives shareholders control over a decision that turns out to harm a third party — an employment decision, a safety-related decision, an environmental matter — those shareholders may face personal liability that they would not have faced as ordinary passive shareholders. Do not take on director powers casually.

Practical Drafting and Maintenance Considerations

A USA should:

• Specifically identify which director powers are being restricted or assumed
• Be referenced (not reproduced in full) on all share certificates
• Be updated whenever a new shareholder joins — the new shareholder must sign an accession agreement, or the USA must be re-executed
• Be reviewed alongside any shareholder agreement to ensure they are consistent

A USA that partially overlaps with a standard shareholder agreement creates confusion. Many lawyers draft a single comprehensive document that satisfies the requirements of a USA, rather than maintaining both a USA and a separate SHA.

Frequently asked questions