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August 27, 2026
What is the difference between Articles of Association and a shareholders’ agreement?
Articles of Association are the official rules governing how a UK company operates, while a shareholders’ agreement is a private contract that governs the relationship between the shareholders.
Every UK limited company must have Articles of Association. A shareholders’ agreement is optional, but it can provide valuable protection when a company has two or more shareholders.
Articles of Association form part of a company’s legal constitution. They contain rules explaining how the company, its directors and its shareholders must operate.
The Articles commonly cover:
Every UK limited company must have Articles. A company can use the standard model articles or adopt customised Articles that better reflect its ownership structure.
Under section 33 of the Companies Act 2006, the company’s constitution binds the company and its members.
A shareholders’ agreement is a private contract between some or all of a company’s shareholders. The company itself may also be included as a party.
It establishes how the shareholders will work together and what should happen in particular circumstances.
A shareholders’ agreement may cover:
Unlike the Articles, a shareholders’ agreement is not legally required.
Every UK limited company must have Articles of Association. If a company does not register customised Articles, the relevant model articles will generally apply by default.
A shareholders’ agreement is optional. A company can operate without one, although this may leave important matters insufficiently addressed.
The Articles are normally filed with Companies House and can be viewed by members of the public.
A shareholders’ agreement is usually confidential. It is not normally filed with Companies House, allowing shareholders to keep commercial arrangements and sensitive information private.
The Articles generally bind the company and its members in their capacity as members. A new shareholder will usually become subject to the Articles when entered in the company’s register of members.
A shareholders’ agreement binds only the people or organisations that are parties to it. A new shareholder should therefore sign a deed of adherence or another suitable document agreeing to be bound by the agreement.
The Articles provide the company’s formal constitutional rules. They focus on matters such as company powers, director decisions, voting, shares and distributions.
A shareholders’ agreement can provide more detailed commercial and personal arrangements between the shareholders. It may address matters that shareholders would prefer not to include in a public document.
The Articles are generally amended by passing a special resolution, usually requiring at least 75% shareholder approval. The resolution and updated Articles must then be filed with Companies House.
A shareholders’ agreement is changed according to its own terms. Many agreements require the consent of every party, although an agreement can specify a different procedure.
A breach of the Articles may involve company-law and constitutional remedies.
A breach of a shareholders’ agreement is usually treated as a breach of contract. Depending on the circumstances, a court may award compensation or order a party to comply with the agreement.
Neither document automatically takes priority in every situation.
The Articles govern the company’s constitutional procedures. A shareholders’ agreement cannot authorise the company to act unlawfully or override the Companies Act 2006.
If shareholders take an action that is valid under the Articles but prohibited by their shareholders’ agreement, the company action may still be valid. However, the shareholder responsible could be in breach of contract and face a legal claim.
For example, the Articles may allow a decision to be approved by a particular voting majority. A shareholders’ agreement may state that the same decision requires unanimous approval. If the required majority under the Articles approves the decision without unanimous consent, the decision might still be valid under company law, but the shareholders who supported it may have breached the agreement.
For this reason, the Articles and shareholders’ agreement should be drafted to work together.
Yes. Both documents may address:
Where both documents cover the same subject, their provisions should be consistent. Conflicting rules can create uncertainty, disputes and additional legal costs.
Every company needs Articles of Association, but not every company requires a shareholders’ agreement.
A simple company owned and managed by one person may not need a shareholders’ agreement. However, one may be advisable when the company has:
A shareholders’ agreement can establish expectations before a disagreement occurs.
The standard model Articles of Association provide basic rules for operating a company. However, they may not deal fully with matters such as:
These issues may be addressed through customised Articles, a shareholders’ agreement or both.
Suppose a company has three shareholders.
Its Articles may establish the formal rules for holding meetings, appointing directors and voting on resolutions.
Its shareholders’ agreement may provide additional rules stating that:
The Articles provide the company’s constitutional framework, while the shareholders’ agreement provides more detailed protections between the owners.
Yes. A properly prepared and executed shareholders’ agreement is generally a legally binding contract between its parties.
No. Every UK limited company must still have Articles of Association. A shareholders’ agreement supplements rather than replaces them.
No. It is normally a private document and is not filed with Companies House.
Only parties who agree to and execute the shareholders’ agreement are bound by it. It is generally advisable for all relevant shareholders—and sometimes the company—to become parties.
Yes. The new shareholder can usually sign a deed of adherence agreeing to be bound by the existing agreement.
Normally not. The agreement must be changed according to its amendment provisions, which may require the consent of all parties.
Articles of Association are compulsory constitutional rules governing how a UK company operates. They are normally publicly available and bind the company and its members.
A shareholders’ agreement is an optional, private contract that provides more detailed rules for the relationship between shareholders. It can address ownership changes, important decisions, disputes, confidentiality and shareholder exits.
Companies with multiple shareholders should ensure that their Articles and shareholders’ agreement are consistent and work together. Legal advice should be considered when preparing or changing either document.
This article provides general information and does not constitute legal advice.
