Shareholders' Agreements: What They Cover and Why Your Company Needs One

Reviewed 30 October 2026 · United Kingdom · General information, not legal advice

A shareholders' agreement is a private contract between a company's owners covering how decisions are made, how shares can be issued or sold, and what happens if someone leaves or they fall out. Without one, the Companies Act and the articles decide.

A shareholders' agreement is a private contract between the owners of a company, and usually the company itself, that sets out how the business will be run, how decisions are taken, how shares can be issued and transferred, and what happens when a shareholder wants to leave, dies or falls out with the others. Your company needs one because the default rules in the Companies Act 2006 and the model articles of association let a simple majority decide almost everything, give a minority shareholder very little say, and provide no way to break a 50/50 deadlock or make a departing shareholder sell. This guide explains how the agreement differs from the articles, the clauses it typically contains, when to put one in place, what happens if you do not, what it costs, and how to keep it consistent with your company's constitution and filings. Company law is largely UK-wide, so the position is the same across the United Kingdom, although Scottish disputes go to the Court of Session.

How a shareholders' agreement differs from the articles

Every company must have articles of association. They are the company's public constitution, filed at Companies House, binding on the company and on every shareholder present and future, and changeable by special resolution, which needs 75% of the votes. Most small companies adopt the model articles under the Companies (Model Articles) Regulations 2008 without amendment.

A shareholders' agreement differs in four ways. It is private: nothing in it has to be filed, so valuation formulas, non-compete periods and funding commitments stay confidential. It is a contract, so it binds only those who sign it, which is why new shareholders are asked to sign a deed of adherence. It can only be changed with the agreement of every party, so a majority cannot amend it the way they can amend the articles. And it can deal with matters the articles cannot sensibly cover, such as obligations to fund the company, business plans and personal restrictive covenants.

The two documents must work together. Rights that need to bind third parties or operate through the company's own procedures, such as share transfer restrictions and the mechanics of drag-along, are usually written into bespoke articles as well, and the agreement includes a supremacy clause saying that, as between the shareholders, the agreement prevails if the documents conflict. One caution: under sections 29 and 30 of the 2006 Act, an agreement by all members that would otherwise have needed a special resolution must be filed at Companies House within 15 days, so solicitors draft to stop the agreement amending the articles by the back door.

What a shareholders' agreement covers

The clauses vary with the company, but most agreements include the following.

Reserved matters and vetoes

A list of decisions that need the consent of all shareholders, or a defined majority such as 75%, rather than the board or a simple majority: issuing shares, changing the articles, borrowing above a threshold, buying or selling a business, related-party transactions, changing the nature of the business, appointing or removing directors, taking on premises and approving the budget. This is the main protection for a minority.

Pre-emption rights

On a new issue of shares, existing holders get the right to subscribe in proportion to their holdings before shares go to outsiders, so nobody is diluted without the chance to keep pace. Section 561 of the 2006 Act provides a statutory version for cash issues, but it is often disapplied in the articles and does not cover transfers. On a transfer, pre-emption rights require a seller to offer the shares to the other shareholders first, at an agreed price or a fair value fixed by the auditors or an independent accountant.

Drag-along and tag-along

A drag-along clause lets shareholders holding a set percentage, often 75%, who accept an offer for the whole company compel the minority to sell on the same terms, so one holdout cannot block a sale. A tag-along clause protects the minority the other way round: if the majority sell, the buyer must offer to buy the minority's shares on the same terms.

Good and bad leaver

Where shareholders are also directors or employees, the agreement obliges a leaver to offer their shares for sale. A good leaver (retirement, ill health, redundancy, death) is paid fair value; a bad leaver (resignation within a set period, dismissal for misconduct, breach of the agreement) receives the lower of what they paid and fair value. Founder vesting schedules work the same way. These clauses are frequently litigated, so the definitions must be precise.

Deadlock

In a 50/50 company nothing in the Act breaks a tie. Options include a chair's casting vote (the model articles provide one, which equal owners usually remove), escalation to mediation, a clause letting either side serve a notice offering to buy or sell at a stated price which the other must accept one way or the other, or an agreed route to a sale or winding up as a last resort.

Dividends, information and funding

A dividend policy stating how much profit is distributed and how much retained, rights to management accounts and board papers for shareholders who are not directors, and whether shareholders must lend or subscribe further capital.

Restrictive covenants and confidentiality

Non-compete, non-solicitation and confidentiality obligations during ownership and for a period afterwards. Courts enforce covenants in shareholders' agreements more readily than those in employment contracts, provided they are reasonable, because the parties are treated as commercial equals.

Exit and valuation

How a shareholder can sell, how shares are valued (a formula, an independent valuer or the price of a recent funding round), whether a minority discount applies, and what happens on death, often through cross-option agreements funded by life insurance so the survivors can buy the shares and the family receives cash rather than a stake in a business they cannot run.

When to put one in place

The best time is at incorporation, when relationships are good and the cost of agreeing terms is low. The next triggers are a second shareholder joining a sole-owner company, an investor subscribing for shares (investors insist on an agreement, usually on their terms), employees receiving shares or options, and a shift in the balance of power such as a founder stepping back. Doing it after a dispute has begun is rarely possible, because the party with the upper hand under the default rules has no reason to give it up. If a prospective co-founder or investor is reluctant to sign, treat that as information about the relationship.

What happens without one

If there is no agreement, the articles and the Act govern. A shareholder with more than 50% of the votes controls the board and ordinary business, decides whether dividends are paid, can remove a director under section 168 of the Act with special notice, and sets salaries. A minority shareholder cannot force a dividend or a buy-out, cannot stop share issues unless statutory pre-emption applies, and has no automatic right to information beyond the annual accounts. A 50/50 company with no deadlock mechanism can be paralysed by one disagreement.

The fallback is litigation. A shareholder treated unfairly can petition under section 994 of the Companies Act 2006 for relief from unfair prejudice; the usual remedy is an order that the majority buy out the shareholder who brought the petition at a price the court sets. In a company run as a quasi-partnership the court may instead wind it up on the just and equitable ground under section 122(1)(g) of the Insolvency Act 1986. These are High Court proceedings that routinely take a year or more, cost each side far more than any agreement would have, and end unpredictably; dispute resolution and litigation explains how such claims proceed. A written agreement with a valuation mechanism avoids most of them.

Cost and process

Solicitors generally charge a fixed fee. For a straightforward agreement between two or three individuals in a small company, 2026 quotes commonly range from a few hundred pounds to around £2,000 plus VAT, often packaged with amended articles; bespoke agreements for several shareholders, an incoming investor or a company with employee shares run to several thousand pounds, and investment rounds with a subscription and shareholders' agreement cost more again. Online templates are cheaper, but a template cannot resolve the questions that matter, which are what the parties want to happen when things go wrong.

The process usually takes two to six weeks: a meeting to work through a checklist (ownership percentages, roles, funding, reserved matters, exits, death and incapacity), a first draft, comments from each shareholder, who should take independent advice where their interests differ, a final version executed as a deed, and new articles adopted by special resolution and filed at Companies House. If the company is being formed at the same time, digital incorporation has cost £100 since 1 February 2026 and the annual confirmation statement £50. Sole trader vs limited company explains the wider decision to incorporate, and what corporate law covers sets out the other company work solicitors handle.

Keeping it consistent with the articles and Companies House

Three habits keep an agreement effective. First, make sure the articles do not contradict it: if the agreement requires 75% consent for a share issue but the model articles let the directors allot shares, adopt new articles. Second, keep Companies House up to date: changes of director, allotments on form SH01, the annual confirmation statement with its statement of capital, and the register of people with significant control (PSC). An agreement that gives a minority shareholder vetoes over key decisions can make them a PSC through significant influence or control even below 25%, and that must be recorded. Since 18 November 2025 every director and PSC must also verify their identity with Companies House, with existing officers brought in over the following year. Third, review the agreement whenever shareholdings change, an investor arrives or the business changes direction, and make every new shareholder sign a deed of adherence.

For help drafting or reviewing an agreement, see business law solicitors in Newcastle, browse business law firms in Leicester or read the business law solicitors sector guide. What business law covers gives an overview, and if the company is about to take premises, commercial leases explained sets out the commitments the shareholders will be approving.

Frequently asked questions

Is a shareholders' agreement legally binding?

Yes. It is a contract, normally executed as a deed, and each party can enforce it against the others through the courts, by injunction to stop a breach or by a claim for damages. It binds only the people who sign it, so a new shareholder must sign a deed of adherence, and it cannot require the company to act unlawfully or override the mandatory provisions of the Companies Act 2006.

Do I need a shareholders' agreement if I own 100% of the company?

Not yet. With a single shareholder there is nobody to agree with, and the articles plus the Act are enough. The moment you plan to bring in a co-owner, an investor or an employee shareholder, put an agreement in place before the shares are issued, because your leverage is greatest while you still hold every share and the other party wants in.

Can a shareholders' agreement override the articles?

Between the shareholders who signed it, yes: a supremacy clause makes the agreement prevail if the two documents conflict, and the parties agree to vote their shares to give it effect. Against the company and outsiders the articles govern, which is why important restrictions are written into bespoke articles as well. An agreement that effectively amends the articles may need to be filed at Companies House within 15 days.

What is the difference between drag-along and tag-along?

Drag-along protects the majority: if holders of a set percentage, typically 75%, agree to sell the whole company, they can require the remaining shareholders to sell on the same terms, so a buyer can be certain of acquiring every share. Tag-along protects the minority: if the majority sell their shares, the minority have the right to join the sale on identical terms rather than being left behind with a new controlling owner.

How do good leaver and bad leaver clauses work?

They apply when a shareholder who also works in the business leaves. The agreement defines each category and the price. A good leaver, such as someone retiring or leaving through ill health, is paid fair value for their shares. A bad leaver, such as someone dismissed for misconduct or resigning within a restricted period, receives a lower price, often the amount originally paid. Because the financial gap is large, the definitions are the most contested part of many agreements.

What can I do if there is no agreement and I am being frozen out?

Take advice quickly and gather evidence of the conduct, such as exclusion from management, unpaid dividends alongside high salaries for the majority, or share issues designed to dilute you. The main remedy is a petition under section 994 of the Companies Act 2006 for unfair prejudice, which usually ends with an order that your shares be bought at a fair price. Many cases settle after a solicitor's letter, and mediation is cheaper than a trial.

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• Sole Trader vs Limited Company: The Legal Differences and Which to Choose
• Commercial Leases Explained: Key Terms Every Business Tenant Should Check
• What Is Corporate Law?
• What is Business Law?
• What Is Dispute Resolution & Litigation?

This guide describes the law in United Kingdom as at 30 October 2026. It is general information, not legal advice about your situation; the law and the figures it quotes change, so check the position with a solicitor before acting. LawFirms.co.uk is a directory and does not provide legal services.