Question

What is the difference between articles of association and a shareholders' agreement?

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Answer

The articles are the company's public constitution; a shareholders' agreement is a private contract between the shareholders. They do different jobs and most companies with more than one owner need both.

Articles of association.

Public — filed at Companies House and readable by anyone.

Bind the company and all members, including anyone who acquires shares later, automatically.

Amended by special resolution — a 75% majority. So a shareholder with less than 25% cannot prevent changes.

Cover constitutional matters: share classes and rights, directors' powers and appointment, meeting and voting procedures, share transfer restrictions, and dividend mechanics.

Most companies adopt the Model Articles unchanged at incorporation, which are generic and frequently unsuitable for a company with several owners.

Shareholders' agreement.

Private — not filed, and its terms are not public. This matters commercially.

Binds only the parties who sign it. A new shareholder is not bound unless they execute a deed of adherence — which is why articles usually require them to.

Amended only by unanimous consent of the parties, unless it says otherwise. This is the crucial difference: it can give a minority shareholder genuine protection that the articles cannot, because it cannot be changed over their objection.

Covers commercial matters between owners: what decisions need unanimous or specified consent, dividend policy, funding obligations, what happens if a shareholder wants to exit, dispute resolution and deadlock provisions, restrictive covenants, and who may appoint directors.

Why both are needed. The articles do the things that must bind the world and be public; the agreement does the things you want private and unchangeable without consent.

Where they conflict, the position is complex — the articles generally prevail as the constitutional document, but the parties to the agreement may be in breach of contract for voting contrary to it. Well-drafted documents are written to be consistent, and inconsistency between them is a common and expensive drafting failure.

What a small company most often lacks, and later regrets: any provision for a founder leaving, deadlock between two equal shareholders, or a forced sale.

General information, not legal advice.

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