Shareholders agreement vs articles of association

Articles of association are the company's public rulebook filed at Companies House. A shareholders agreement is a private contract between the shareholders covering what happens when founders disagree or leave. Most UK companies with more than one shareholder benefit from both; the two documents do different work and complement each other.

What the articles do

Articles of association are the company's constitutional document under the Companies Act 2006. Every UK company has them. They are filed at Companies House and public: anyone can read them.

The articles cover the mechanical, structural rules that bind the company itself:

• The types of shares the company can issue.
• The procedure for board and shareholder meetings.
• How directors are appointed and removed, and what powers they have.
• Share transfer mechanics (standard restrictions, pre-emption rights where included).
• Dividend declarations.
• Capital reductions, allotments and buy-backs.

Most small UK companies adopt the model articles (set out in the Companies (Model Articles) Regulations 2008), sometimes with light amendments. For a trading company with more than one shareholder, bespoke articles usually appear at the first external investment round.

What a shareholders agreement does

A shareholders agreement is a private contract between some or all of the shareholders, and often the company itself. It is not filed anywhere; it is confidential between the signatories. The agreement covers the human and situational issues the articles do not touch:

• Equity vesting and reverse-vesting mechanics for founders.
• "Good leaver" and "bad leaver" treatment on departure.
• Drag-along rights (majority can compel minority to join a sale).
• Tag-along rights (minority can insist on joining a majority sale).
• Pre-emption on new issues and transfers.
• Reserved matters (decisions needing shareholder, not just board, consent).
• Dividend and reinvestment policy.
• Information rights (board packs, management accounts).
• Deadlock resolution between shareholders.
• Exit and liquidation preferences.
• Non-compete and non-solicit obligations on founders.

The agreement is the place where founders agree, in advance and in writing, how specific scenarios will play out.

Side-by-side comparison

Why most companies need both

Three practical reasons.

Confidentiality. You want certain commercial terms (vesting, drag-along threshold, specific reserved matters) agreed, but you do not want them public at Companies House. The shareholders agreement is private; the articles are not.

Enforceability against the right people. A clause binds the people who have agreed to it. The articles bind the company and its members; a shareholders agreement binds its signatories. If an incoming investor is not a party to the shareholders agreement, they are not bound by its leaver provisions.

Flexibility. Changing the articles needs a 75% special resolution and a Companies House filing. Changing a shareholders agreement needs the agreement of its signatories (which can be anything from unanimity down to 51%, depending on how it is drafted). Different mechanics for different changes.

What happens if the two documents conflict

Both documents are legally binding, but they operate on different parties:

• Between the company and its members, the articles win on structural matters, because the company's capacity to act is defined by its constitution.
• Between shareholders as individuals, the shareholders agreement wins on matters it specifically addresses, as a private contract.

Good drafting avoids conflicts by making the shareholders agreement require shareholders to vote at a general meeting to amend the articles if a change is needed to give effect to something in the agreement.

Common conflict traps: dividend policies in both documents that do not match; pre-emption rights with different percentages; drag-along thresholds that do not line up. A review should flag these before signing.

When each is enough on its own

Articles only can be sufficient when:

• There is one shareholder, or two shareholders with equal shares and no complex expectations.
• There is no outside investment.
• The founders are family or long-term partners with no near-term fundraising plans.

Shareholders agreement is almost always worth adding when:

• There are more than two shareholders.
• Shares are not all held equally.
• Any founder is also an employee or director (vesting and leaver provisions matter).
• Outside investment is coming in, now or within 12 months.
• The company has reserved matters that are not already in the articles.

Drafting pointers

Three choices make the biggest difference to how the shareholders agreement operates in practice.

Reserved matters list. Keep it tight. Everything on the list requires shareholder consent, which can slow the company down. Common items: issuing new shares, taking on material debt, selling the business or any substantial asset, materially changing the business, paying dividends, hiring or firing the CEO, approving the annual budget.

Leaver mechanics. Define "good leaver" and "bad leaver" carefully and keep the trigger events specific. Good leavers typically keep more or all of their vested shares; bad leavers typically have shares bought back at nominal value (or fair value, depending on the stance taken).

Drag-along threshold. The threshold at which the majority can compel the minority to sell matters a lot on exit. 75% is common; 50% is aggressive; 90% is overly protective of the minority and can cause real problems in a sale.

Frequently asked questions

Do I need a shareholders agreement if I have articles?

If there is more than one shareholder and you want certainty on vesting, leavers, deadlock or exit, yes. The articles rarely cover those scenarios adequately on their own.

Does the shareholders agreement get filed anywhere?

No. It is a private contract between its signatories.

Which document wins in a conflict?

Articles win on structural matters that affect the company. The shareholders agreement wins between the signatories on matters it addresses. Good drafting prevents conflicts.

How much does a shareholders agreement cost?

MrBondLegal drafts shareholders agreements from £890, with sign-off by an SRA-regulated solicitor.