Share Sale Agreement
This page explains what a share sale agreement is, when it is used, and how it differs from other agreements involved in selling shares in a company.
Written by: Mark Lazarus, Commercial Lawyer, Director of Lazarus Legal
Published: 06 February 2026
Legal Disclaimer: The information on this page is general in nature and is not intended to constitute legal advice. It does not take into account your personal circumstances. Laws and legal processes can change, and their application varies between cases. You should seek independent legal advice before acting on any information on this page.
What Is A Share Sale Agreement?
A share sale agreement is a contract that transfers ownership of shares in a company from a seller to a buyer. The buyer acquires the shares themselves, not the company’s underlying assets.
When shares are sold, the buyer steps into the seller’s ownership position. The company’s assets, liabilities, contracts, and obligations remain with the company. This differs from an asset sale, where specific business assets are transferred instead.
The agreement records the terms of the share transfer, including price, conditions, and any promises made about the company’s financial or legal position.
When Is a Share Sale Agreement Typically Used?
In Australia, share sale agreements are commonly used in the following situations:
- Private company transactions: Selling shares in a proprietary limited company to another individual or entity
- Internal restructures: Transferring shares between existing shareholders or related parties
- Family businesses: Passing ownership to family members or trusted successors
- Minority share sales: Selling a portion of shares while retaining partial ownership
- Majority or controlling interest sales: Transferring enough shares to change control of the company
Share Sale Agreement VS Related Agreements
Share sale agreements are often confused with other transaction documents that sound similar or serve related purposes. The confusion typically arises because all involve transfers, ownership, or business transactions, but the legal and commercial outcomes differ significantly. Understanding these distinctions helps clarify what is actually being bought, sold, or created in each type of transaction.
Share Purchase Agreement
A share purchase agreement refers to the same transaction as a share sale agreement. The terms are used interchangeably, though "share purchase agreement" is typically drafted from the buyer's perspective while "share sale agreement" reflects the seller's view.
Business Sale Agreement
A business sale agreement transfers the business's assets and operations rather than ownership shares in the company. The buyer acquires specific assets like equipment, intellectual property, and goodwill, but does not become a shareholder. The company itself remains with the original owner.
Share Subscription Agreement
A share subscription agreement involves the creation and issue of new shares by the company to a buyer. Unlike a share sale agreement, no existing shareholder sells their shares. Instead, the company expands its share capital and the buyer becomes a new or additional shareholder.
Types Of Share Sale Agreements
Share sale agreements may vary depending on the structure and scale of the transaction.
- Full vs partial share sales. A full share sale transfers 100% of the company's shares to the buyer. A partial share sale transfers only some shares, leaving the seller or other shareholders with ongoing ownership.
- Single vs multiple sellers. Some agreements involve one seller transferring their shares. Others involve multiple sellers acting together, particularly in family businesses or partnerships.
- Simple vs complex transactions. Straightforward sales between two parties with few conditions differ from transactions involving warranties, earn-outs, deferred payments, or regulatory approvals.
What Does A Share Sale Agreement Usually Cover?
Share sale agreements typically include a range of provisions that set out the terms of the transaction and allocate risk. These provisions clarify what is being sold, how the purchase price is determined and paid, and what responsibilities each party has before and after completion.
Parties and shares
- Names of the seller and buyer
- Details of the shares being sold (class, number, percentage)
- Identification of the company
Price and payment
- Purchase price for the shares
- Payment method (lump sum, instalments, earn-out structure)
- Adjustment mechanisms if applicable
Warranties and representations
- Statements by the seller about the company's financial position
- Assurances about legal compliance and absence of undisclosed liabilities
Conditions precedent
- Requirements that must be satisfied before completion (e.g., board approval, third-party consents)
- Timeframes for meeting these conditions
Completion mechanics
- Date and location of settlement
- Documents to be exchanged at completion
- Transfer of share certificates or CHESS-sponsored holdings
Post-sale obligations
- Restraint of trade provisions if applicable
- Transition support arrangements
- Confidentiality requirements
What A Share Sale Agreement Does Not Cover
A share sale agreement has specific boundaries and does not govern certain matters, including the following:
Business assets and operations. The agreement transfers ownership shares only. It does not separately transfer property titles, intellectual property registrations, or equipment ownership, as these remain with the company.
Operational control. While share ownership may confer voting rights, day-to-day management authority often requires separate appointment as a director. The agreement itself does not grant operational powers.
Employment arrangements. Existing employment contracts continue with the company. New employment terms for key personnel require separate documentation.
Matters covered by other documents. Company constitutions, shareholder agreements, and director service agreements govern issues like dividend rights, board composition, and dispute resolution. The share sale agreement does not override these unless explicitly stated.
Supporting Documents Often Used With a Share Sale Agreement
Several documents typically accompany a share sale agreement to complete the transaction legally.
- Share transfer forms. These record the transfer with the company and update the share register. ASIC Form 484 may be required depending on the company structure.
- Company constitution and shareholder agreement. These documents may contain pre-emptive rights or transfer restrictions that must be satisfied before shares can be sold.
- Board and shareholder resolutions. Directors and shareholders may need to approve the share transfer, particularly if the constitution requires consent.
- ASIC notifications. Changes in shareholding may require lodgement with the Australian Securities and Investments Commission within prescribed timeframes.
Risks Of Using A Share Sale Agreement Template
Using a generic share sale agreement template can create risk because it assumes a one-size-fits-all transaction. Templates are typically drafted for broad use and may not reflect the specific legal, financial, or structural features of the company whose shares are being sold. As a result, important issues can be overlooked or incorrectly addressed.
Company-Specific Issues
Templates may not address unique features of the company's structure, such as multiple share classes, employee share schemes, or complex ownership arrangements.
Inadequate Warranties
Standard warranties may not cover specific risks relevant to the company's industry, financial position, or compliance history.
Liability Assumptions
Templates may incorrectly allocate responsibility for existing debts, tax obligations, or undisclosed liabilities that remain with the company after the sale.
Australian law Compliance
Documents sourced from overseas jurisdictions may not align with Australian corporate law, tax obligations, or ASIC requirements.
Do You Need A Lawyer To Sell Shares?
Legal advice is often recommended when selling shares because the transaction can involve significant legal and financial risk. This is particularly the case where the company has existing liabilities, employs staff, holds valuable contracts, or may face future claims.
As the share sale agreement is the key document that records the terms of the transaction and allocates risk between the parties, having it drafted or reviewed by a lawyer can help ensure warranties, disclosures, and liability provisions reflect the circumstances of the sale. This reduces the risk of disputes or unexpected obligations after completion.
If you are selling shares in a company, consider consulting a contract lawyer to ensure the share sale agreement appropriately addresses the transaction’s legal and commercial risks.
Summary
- A share sale agreement transfers ownership of company shares from a seller to a buyer without selling the company’s assets.
- It differs from business sale agreements, which transfer assets, and share subscription agreements, which issue new shares.
- The agreement typically covers purchase price, warranties, conditions, and completion mechanics.
- Supporting documents like share transfer forms and resolutions are usually required.
- Using generic templates carries risks, particularly regarding company-specific liabilities and Australian legal compliance.
About Mark Lazarus – Director, Lazarus Legal
Admitted in both Australia and the UK, Mark brings more than two decades of global legal experience to Lazarus Legal. Having worked as a barrister, in private practice, and as in-house counsel for a major international consumer brand he combines courtroom-honed advocacy with commercial insight. Specialising in commercial law, intellectual property and dispute resolution, Mark advises startups, creative businesses, and established enterprises on transactions, trademarks, contract drafting, and litigation strategy. His cross-jurisdictional background and history as a former in-house legal director give clients confidence that their legal issues will be managed with both strategic foresight and commercial realism.