Shareholders’ Agreements in Singapore: The Key Clauses the Model Constitution Leaves Out

Short answer: A shareholders’ agreement is a private contract between the shareholders that fills the gaps the model constitution leaves. It sets out who decides what, how shares can be sold or issued, what happens on deadlock and when a founder leaves. Without one, disputes fall back on the Companies Act 1967 and, often, costly oppression claims under section 216.

Raffles Corporate Services works with a panel of experienced Singapore law firms who offer cost-effective and efficient legal service and advice. This article is general information only and is not legal advice.

Why is the model constitution not enough?

The model constitution is designed to make a company function, not to protect any particular shareholder. It deals with meetings, directors and share transfers in general terms, but it is silent on the commercial deal between co-founders and investors.

Most Singapore companies are incorporated on the model constitution because it is quick and free to adopt through Bizfile, as ACRA’s guidance on constitutions explains. Under it, ordinary resolutions pass by simple majority and the board runs the business. A 51% shareholder can usually control the board, and a 49% partner has little say over budgets, hiring, borrowing or a sale of the business.

A shareholders’ agreement adds the rules the parties actually negotiated. It is also private: the constitution is lodged with ACRA, while a shareholders’ agreement does not need to be filed. Our article on the shareholders’ agreement versus the constitution explains what usually goes where.

What are reserved matters, and why do they matter most?

Reserved matters are decisions that cannot be taken without the consent of a specified majority of shareholders, or of a named investor or founder. They are the main tool a minority shareholder has to protect its position.

A typical list includes:

• Issuing new shares, options or convertible instruments.
• Changing the constitution, share rights or the company’s business.
• Borrowing, giving guarantees or creating security above a set amount.
• Approving the annual budget and business plan.
• Appointing or removing key executives, or setting directors’ pay.
• Selling the business or a major asset, or starting a winding up.
• Paying dividends, or entering into transactions with a shareholder or director.

Keep the list practical. Too long a list gives a minority a veto over day-to-day decisions and creates deadlock; too short a list leaves it with no protection. Thresholds (for example, borrowing above S$100,000) work better than blanket bans.

How do pre-emption, drag-along and tag-along rights work?

These three clauses control who can come into, and go out of, the shareholder register. Pre-emption protects existing holders from dilution and unwanted newcomers, while drag-along and tag-along manage a sale of the company.

Pre-emption on issue and transfer

Section 161 of the Companies Act 1967 already requires shareholder approval in general meeting before directors issue shares. A shareholders’ agreement goes further: new shares must first be offered to existing shareholders pro rata, and a shareholder who wants to sell must first offer to the others, usually at the same price as a genuine third-party offer. See our guide to pre-emptive rights.

Drag-along and tag-along

A drag-along lets holders of a set majority (often 75%) force the minority to sell on the same terms when a buyer wants 100% of the company. A tag-along does the reverse: if a majority holder sells, the minority can insist on selling on the same terms. Drafting points include the trigger threshold, minimum price, the warranties the dragged shareholders must give and a power of attorney so the transfer can be completed if someone refuses to sign. More detail is in our article on drag-along and tag-along rights.

How should a shareholders’ agreement handle deadlock?

A deadlock clause tells the parties what to do when the board or shareholders cannot reach a decision, so that a dispute does not end up in court. It matters most in 50:50 companies and joint ventures.

Without a mechanism, the fallback may be an application to wind up the company on the just and equitable ground under the Insolvency, Restructuring and Dissolution Act 2018, which destroys value for everyone. Common mechanisms, often used in sequence, are:

1. A cooling-off period followed by escalation to senior representatives or chairpersons.
2. Mediation, for example at the Singapore Mediation Centre, within a fixed period.
3. A casting vote for the chair on specified matters only.
4. A buy-sell mechanism, such as a “Russian roulette” or “Texas shoot-out”, where one party names a price and the other must buy or sell at it.
5. As a last resort, an agreed sale of the company or a voluntary winding up.

What are good leaver, bad leaver and vesting provisions?

Leaver and vesting clauses deal with the most common founder dispute: a co-founder who stops working in the business but keeps their shares. They decide whether the departing founder must sell, and at what price.

Leaver clauses work only if the transfer can actually be completed. Include a mechanism for the company secretary to process the transfer and update the register, and a power of attorney in case the leaver will not sign.

Are non-compete clauses in a shareholders’ agreement enforceable?

They can be, but only if reasonable. Singapore courts apply the restraint of trade doctrine: a restriction is void unless it protects a legitimate interest, such as goodwill or confidential information, and is reasonable in its activity, geography and duration.

Courts tend to be more willing to uphold a restraint given by a shareholder who has received value for their shares than one imposed on an ordinary employee, but an unlimited worldwide ban will still fail. Practical drafting tips: tie the restraint to the company’s actual business and markets, keep the period proportionate (often measured from when the person ceases to be a shareholder), and add separate non-solicitation and confidentiality clauses that can stand on their own. Where a founder is also an employee, check the employment-side rules as well; see our article on enforcing a non-compete.

How does the shareholders’ agreement interact with the constitution and section 216?

The two documents must be read together. The constitution binds the company and every member under section 39, while the shareholders’ agreement binds only its signatories. If they conflict, the company acts on its constitution, and the shareholder’s remedy is usually a claim in contract against the others.

Good practice is to:

• Include a clause that the shareholders’ agreement prevails between the parties and that they will vote to amend the constitution to remove any conflict.
• Mirror the key transfer restrictions, pre-emption and drag-along rights in a customised constitution, so they bind future shareholders and the board when registering transfers. Changing the constitution needs a special resolution and an ACRA filing.
• Require every new shareholder to sign a deed of adherence before shares are issued or transferred to them.

Section 216 oppression risk

Section 216 of the Companies Act 1967 allows a member to apply to court where the company’s affairs are conducted, or directors’ powers exercised, oppressively or in disregard of the member’s interests. Excluding a co-founder from management, diverting business, diluting a minority without proper process or ignoring agreed understandings can all found a claim. The court has wide powers, including ordering one party to buy the other’s shares.

A well-drafted agreement reduces this risk in two ways: it makes the parties’ expectations explicit, and it provides an agreed exit route and valuation method so that a dispute can be resolved commercially. See our explainer on the section 216 oppression remedy.

How can Raffles Corporate Services help?

We keep the company’s registers, resolutions and ACRA filings aligned with what the shareholders have agreed. Allotments and transfers of shares, including the subscription agreement, shareholders’ resolutions and filings, cost S$350 for existing clients and S$500 for others. Our Annual Corporate Package Add On at S$750 a year includes custom preparation of up to three shareholders’ agreements, plus resolutions and share transfer instruments, for companies with frequent changes. Where you need bespoke drafting, negotiation or advice on a dispute, we work with our panel of Singapore law firms.

Frequently asked questions

Is a shareholders’ agreement compulsory in Singapore?

No. It is optional, but any company with more than one shareholder benefits from one, especially where ownership is close to 50:50 or one party is investing money and another is contributing work.

Does a shareholders’ agreement need to be filed with ACRA?

No. It is a private contract. Only the constitution and any changes to it are lodged with ACRA.

What happens if the shareholders’ agreement conflicts with the constitution?

The company is bound by its constitution. Between the signatories, the agreement usually says it prevails and obliges them to amend the constitution, so the remedy is enforcement of that contractual promise.

Does a new shareholder automatically become bound by the agreement?

No. They must sign it or a deed of adherence. Make signing a condition of any share issue or transfer.

Can a shareholders’ agreement stop a section 216 claim?

It cannot remove the statutory right, but clear terms and a fair exit mechanism make oppression claims less likely and can influence how the court views the dispute.

Last reviewed: 4 October 2026. The Editorial Team, Raffles Corporate Services.