A Share Purchase Agreement (SPA) is the primary legal document used to transfer ownership of shares in a privately held Canadian corporation from a vendor (seller) to a purchaser (buyer). When a purchaser acquires shares in a corporation rather than the corporation's underlying assets, the mechanism for that transfer is a share purchase agreement, which records the agreement between the parties for the sale and purchase of a specified number of shares at an agreed price.

The legal framework for share purchase transactions in Canada involves both federal and provincial corporate law, as well as provincial securities legislation. Under the Canada Business Corporations Act (CBCA), a fundamental characteristic of Canadian corporate law is that shares have no par value (CBCA s24). Unlike the United States, where shares may have a nominal par value (such as $0.001 per share), Canadian law abolished the par value concept. The full consideration received for the issuance of shares is added to the corporation's stated capital account for the applicable class or series (CBCA s26). This means that in a Canadian SPA, the purchase price per share is simply the agreed value between the parties, without reference to a nominal or par value.

Transfer of shares in a CBCA corporation is recorded in the corporation's securities register (CBCA s50), which every corporation must maintain at its registered office or at another designated place in Canada. For certificated shares, the transfer requires delivery of the share certificate with a duly executed transfer instrument or endorsement. The securities register is the definitive record of share ownership and takes precedence over the share certificate in the event of any discrepancy.

Canadian share purchase agreements are also governed by provincial Securities Acts and National Instrument 45-106 — Prospectus Exemptions. Unlike the United States, which has a single federal Securities and Exchange Commission (SEC), Canada operates a system of provincial securities regulators coordinated through the Canadian Securities Administrators (CSA). Shares in private corporations are typically sold under a prospectus exemption (such as the accredited investor exemption or the private issuer exemption) and are subject to hold periods and resale restrictions under the applicable provincial Securities Act.

A share purchase agreement is required whenever the ownership of shares in a Canadian private corporation changes hands by agreement between the parties.

The most common scenario is a business acquisition where the purchaser acquires control of the target corporation by purchasing the vendor's shares. In Canada, the choice between a share purchase and an asset purchase has significant tax implications. In a share purchase, the vendor sells their shares and realizes a capital gain (or loss) on the disposition. Under section 110.6 of the Income Tax Act (Canada), individual vendors may be eligible for the lifetime capital gains exemption (LCGE) on the sale of qualified small business corporation shares (currently up to $1,016,836 for 2024, indexed to inflation). This exemption is not available in an asset sale, making share purchases attractive for vendor-sellers of qualifying small businesses.

Management buyouts where the management team acquires the corporation from departing shareholders require share purchase agreements that address valuation, vendor financing, and transition obligations. Private equity investments involving the purchase of existing shares from founders or early investors (secondary transactions) need SPAs that coordinate with existing unanimous shareholders' agreements and any rights of first refusal.

Inter-family transfers of business ownership, particularly in the context of succession planning, frequently use share purchase agreements combined with estate freezes under section 86 or 85 of the Income Tax Act.

Investor exits where a venture capital firm or angel investor sells their shares to a new investor or back to the management team are documented through SPAs that address the terms of the exit and compliance with any pre-existing shareholders' agreement provisions.

A well-structured Canadian Share Purchase Agreement should contain several key provisions to protect both the purchaser and the vendor and to comply with applicable corporate and securities laws.

The parties and recitals section identifies the vendor, the purchaser, and the target corporation (including its jurisdiction of incorporation and registered office address), and describes the shares being sold — the number, class, and percentage of total issued and outstanding shares.

The purchase price and payment section specifies the total consideration in Canadian dollars, the price per share (noting that shares have no par value under the CBCA), the payment method, and any escrow or holdback arrangements.

The closing section details the obligations of each party at closing, including the vendor's delivery of share certificates (duly endorsed or accompanied by a transfer instrument), a directors' resolution approving registration of the transfer in the securities register, an updated securities register, and any required third-party consents.

The securities law representations section addresses provincial Securities Act compliance and National Instrument 45-106 prospectus exemptions relied upon for the transfer, the purchaser's investment intent, and any applicable hold periods and resale restrictions.

The vendor warranties are representations of fact about the corporation, qualified by disclosure schedules and subject to survival periods and indemnification caps. Canadian-specific references include the Bankruptcy and Insolvency Act (Canada), the Income Tax Act (Canada), the Canada Pension Plan, the Employment Insurance Act, and the Canadian Environmental Protection Act.

The non-competition section restricts the vendor from competing with the corporation's business, consistent with the principles established by the Supreme Court of Canada in Elsley v J.G. Collins Insurance Agencies Ltd, [1978] 2 SCR 916.

The governing law and jurisdiction section specifies the governing provincial law and the federal laws of Canada applicable therein.