The Company Constitution

What is a company constitution? A practical guide to the documents and resolutions that make up a UK company’s constitution, including articles of association, special resolutions, shareholder rights and amendment procedures.

The company constitution is the set of documents and resolutions that govern how a UK company is run. It defines the relationship between the company, its directors and its shareholders, and sets out the rules for decision-making, share rights and internal management.

What Makes Up the Constitution

Under the Companies Act 2006 (s.17), a company’s constitution includes:

Component Description
Articles of association The primary governance document setting out the rules for running the company
Resolutions and agreements Special resolutions and other constitutional resolutions that affect the articles
Memorandum of association The formation document (for companies formed under the 2006 Act, this is a simple statement of intent)
Certificate of incorporation Confirms the company’s legal existence and type

For companies incorporated before 1 October 2009 (under the Companies Act 1985), the memorandum may contain additional provisions (such as the objects clause) that are treated as part of the articles.

Articles of Association

The articles of association are the most important part of the constitution. They cover:

Model Articles

Companies can adopt the model articles prescribed by the Companies (Model Articles) Regulations 2008. There are separate model articles for:

If a company does not file its own articles on incorporation, the relevant model articles apply by default. Most companies adopt the model articles with modifications tailored to their needs.

Companies with more complex requirements may draft bespoke articles with additions such as pre-emption provisions on share transfers, good leaver/bad leaver clauses, reserved matters requiring shareholder consent and deadlock resolution mechanisms.

Resolutions Affecting the Constitution

Certain decisions require a special resolution (at least 75% majority) because they alter the company’s constitution.

Resolution Type Majority Required Purpose
Special resolution 75% Amend articles, change company name, reduce share capital, wind up voluntarily
Ordinary resolution Simple majority (over 50%) Appoint directors, approve dividends, appoint auditors
Written resolution Same thresholds as above Any resolution passed without a meeting (private companies only)

A copy of every special resolution must be filed with Companies House within 15 days of being passed.

Shareholder Rights

The constitution defines the rights of shareholders, which broadly fall into three categories:

Voting Rights

Economic Rights

Information Rights

Shareholders’ Agreement vs Articles

A shareholders’ agreement is a private contract between shareholders that sits alongside the articles. The key differences are:

Feature Articles of Association Shareholders’ Agreement
Public document Yes (filed at Companies House) No (confidential)
Binds all members Yes (including future shareholders) Only those who sign it
Amendment Special resolution (75%) Unanimous consent (usually)
Enforcement As a statutory contract under s.33 CA 2006 As a private contract
Registration Must be filed with Companies House Not filed

In practice, many companies use both documents. The articles deal with governance and procedural matters that should be public, while the shareholders’ agreement covers commercial arrangements, exit provisions and matters the parties want to keep confidential.

Entrenched Provisions

The Companies Act 2006 allows companies to include entrenched provisions in their articles that can only be amended by meeting conditions more restrictive than a special resolution (e.g. unanimous consent or consent of a specific shareholder class). Entrenchment cannot make a provision completely unamendable. A notice of entrenchment must be filed with Companies House using form CC03.

Amending the Constitution

Amending the Articles

The articles can be amended by passing a special resolution (75% majority). The amended articles must be filed with Companies House within 15 days along with a copy of the resolution. The amendment takes effect from the date the resolution is passed (not from the date of filing).

Restrictions on Amendments

An amendment to the articles:

Practical Steps

  1. Draft the proposed amendment clearly identifying the article(s) to be changed
  2. Give proper notice of the general meeting or circulate a written resolution
  3. Pass the special resolution with at least 75% of votes cast
  4. File the resolution and amended articles with Companies House within 15 days
  5. Update the company’s records to reflect the new articles

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