TRW & Co · Company law and governance
Shareholder Agreements in the UK: What to Include
A shareholder agreement UK companies sign is a private contract that sets the rules between owners: who decides what, how shares are issued and sold, what happens when a founder leaves, and how deadlock and disputes are resolved. It works alongside the public articles of association and, unlike them, usually cannot be changed without every party's consent.
Key pointArticles can be amended by a 75% special resolution, but a shareholder agreement normally needs unanimous consent to change, which is why minority protections such as reserved matters and veto rights belong in the agreement, while transfer mechanics belong in the articles.
At a glance
Private and contractual
Unlike the articles, a shareholder agreement is not filed at Companies House, keeping valuations, leaver prices and investor rights confidential between the parties.
Harder to change
Articles change by special resolution of 75% under section 21; a shareholder agreement normally requires every party's consent, giving each signatory an effective veto.
Statutory pre-emption
Section 561 requires new equity securities to be offered pro rata to existing holders first, but private companies may exclude it in their articles.
Removal right remains
Shareholders can always remove a director by ordinary resolution under section 168, so board protections rely on voting undertakings and carefully drafted articles.
Deadlock needs a plan
Equal holdings need escalation, mediation and buy-sell mechanisms, otherwise disputes may end in an unfair prejudice or winding-up petition.
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The short answer: what a shareholder agreement UK companies need covers
A shareholder agreement UK companies use is a private contract between some or all of the shareholders, and often the company, that governs how the company is run and how shares can change hands. It sits alongside the articles of association. A good one deals with decision-making and reserved matters, board appointments, funding, share issues and transfers, drag and tag rights, leaver provisions, restrictive covenants, deadlock and dispute resolution.
No law requires a shareholder agreement. UK company law instead supplies default rules: without an agreement, shareholders fall back on the Companies Act 2006 and the articles, where a 50.1% holder controls most decisions and a minority has limited protection. The time to agree terms is at the start, while relationships are good.
Shareholder agreement vs articles of association
Every company must have articles. They are public, filed at Companies House, and under section 33 of the Companies Act 2006 they bind the company and its members as if they were a contract. Many private companies adopt the model articles with amendments; our guide to articles of association explains the options.
A shareholder agreement differs from the articles in three important ways. Understanding them is the starting point for any shareholder agreement UK lawyers draft:
- Confidentiality. It is not filed publicly, so commercial terms such as valuations, leaver prices and investor rights stay private.
- Amendment. Articles can be changed by special resolution, meaning 75% of votes under section 21. A shareholder agreement normally requires the consent of every party to change, giving minorities a veto.
- Remedies. Breach of a shareholder agreement gives a contractual claim, including injunctions and damages, between the parties.
The two documents must be consistent. Most agreements state that the agreement prevails over the articles between the parties and oblige shareholders to vote to amend the articles to remove any conflict. Transfer restrictions and pre-emption on transfer are usually placed in the articles too, so they bind future shareholders and the company's registration of transfers.
Making the company a party
Including the company as a party is common, but there are limits. In Russell v Northern Bank Development Corporation [1992] 1 WLR 588, the House of Lords held that a company cannot contract away its statutory power to alter its articles, although shareholders can validly agree among themselves how to vote. Careful drafting separates the company's obligations from shareholders' voting undertakings.
Key clauses in a shareholder agreement UK practice expects
Every shareholder agreement UK businesses sign should be tailored, but the table summarises the clauses found in most well-drafted agreements and who each primarily protects.
| Clause | What it does | Mainly protects |
|---|---|---|
| Reserved matters | Lists decisions that need shareholder or investor consent, such as new share issues, borrowing, acquisitions, changing the business or the articles | Minority and investors |
| Board composition | Gives shareholders rights to appoint and remove directors and observers | Significant holders |
| Pre-emption on issue | Requires new shares to be offered to existing holders pro rata first | All holders against dilution |
| Pre-emption on transfer | Gives existing holders first refusal on shares a holder wishes to sell | Existing holders |
| Drag-along | Lets a specified majority force others to sell on the same terms to a third-party buyer | Majority and exit |
| Tag-along | Lets minority holders join a sale of control on the same terms | Minority |
| Good and bad leaver | Requires a departing founder or employee to sell shares at a price that depends on the reason for leaving | Remaining holders |
| Restrictive covenants | Restrict competing, soliciting and poaching during and after involvement | The company's goodwill |
| Deadlock | Sets a route to break a stalemate between equal holders | All holders |
| Dispute resolution | Chooses escalation, mediation, arbitration or courts | All holders |
Control, reserved matters and board rights
The Companies Act 2006 gives the board day-to-day management and leaves most shareholder decisions to an ordinary resolution of more than 50%. Special resolutions, needing 75% under section 283, are required for matters such as changing the articles. A 25% plus one holder can therefore block special resolutions, but has no say over ordinary resolutions or board decisions.
Reserved matters change that balance. A typical list covers issuing shares, changing share rights, borrowing above a threshold, acquisitions and disposals, related-party transactions, the annual budget, senior hires and changing the nature of the business. Draft the list for the company's real risks: too long and it paralyses management; too short and the minority is exposed.
Board appointment rights are equally important. Note that section 168 lets shareholders remove any director by ordinary resolution despite anything in an agreement. That statutory right cannot be excluded, but its effect can be managed, for example by weighted voting rights in the articles or by an undertaking among shareholders on how they will vote.
Funding, dividends and information
Founders often assume the business will be funded as needed, then disagree when it is not. A shareholder agreement UK investors will accept should say whether shareholders must provide further funding, on what terms, and what happens if one cannot or will not contribute. Common answers are pro rata shareholder loans, a rights issue with dilution for non-participants, or third-party finance with consent.
A dividend policy is equally useful. A minority holder who is not employed by the company may depend on dividends for any return, while working founders prefer to reinvest. Agreeing a target distribution, subject to distributable profits and the directors' duties, avoids a common source of grievance. Information rights, such as monthly management accounts, the annual budget and access to the board pack, let non-board shareholders monitor their investment.
Reserved matters only work if someone checks them. Build a short consent log into board procedure, and record investor consents in writing before the company acts. A shareholder agreement UK courts are asked to enforce is far easier to rely on where the paper trail shows consent was sought each time.
Share issues, transfers and exits
Pre-emption on new shares
Under section 561, a company must generally offer new equity securities to existing ordinary shareholders pro rata before allotting them to anyone else. Private companies can exclude the statutory regime in their articles under section 567, and many replace it with bespoke rules that carve out employee share options or an agreed investment round.
Transfers, drag and tag
Most agreements prohibit transfers except to permitted transferees, such as family trusts or group companies, or after a pre-emption offer to the other holders. Drag and tag rights then govern a sale of the whole company. The drag threshold, minimum price, form of consideration and limits on warranties a dragged holder must give are the points most often negotiated. For investors, see our guide to venture capital term sheets.
Good and bad leavers
Leaver provisions require a departing founder or employee-shareholder to offer their shares for sale. A good leaver, such as one who leaves through death, ill-health or dismissal without cause, usually receives fair or market value. A bad leaver, such as one who resigns early or is dismissed for gross misconduct, may receive the lower of cost and market value. Vesting schedules often reduce the bad leaver portion over time. Definitions need careful drafting, as they are a frequent source of disputes and must operate fairly to remain enforceable.
Deadlock and dispute resolution
Deadlock is the main risk in a 50:50 company or joint venture, and the clause most often missing from a home-made shareholder agreement. UK courts cannot simply decide commercial questions for the parties. Mechanisms range from gentle to drastic:
- escalation to senior executives or chairs of the parent companies;
- mediation, often with a short timetable;
- a casting vote for the chair, which effectively hands control to one side;
- buy-sell provisions such as a "Russian roulette", where one party names a price and the other must buy or sell at it, or a "Texas shoot-out" sealed-bid process;
- a solvent winding up as a last resort.
For dispute resolution, many agreements choose arbitration, particularly with foreign shareholders, because awards are widely enforceable abroad. English-seated arbitration is governed by the Arbitration Act 1996, as amended by the Arbitration Act 2025. Institutions such as the LCIA are commonly chosen. Shareholders can still bring an unfair prejudice petition under section 994 where the company's affairs are conducted in an unfairly prejudicial way, unless a valid arbitration agreement covers the dispute.
Putting a shareholder agreement in place
The best time to negotiate is at incorporation or on the first external investment, when every party has a reason to agree. Retrofitting one later is harder, because each existing shareholder can refuse to sign. The steps below reflect common practice in England and Wales.
- Agree the commercial deal. Settle ownership percentages, funding obligations, roles, vesting and exit expectations in a short heads of terms.
- Review the articles. Decide what belongs in the articles (share rights, transfer restrictions) and what stays private in the agreement.
- Draft the agreement. Tailor reserved matters, leaver terms and deadlock provisions to the business; avoid unadapted templates.
- Take separate advice. Each shareholder group should be advised independently, particularly minority founders and investors.
- Pass the resolutions. Adopt new articles by special resolution, disapply or replace pre-emption, and allot shares as needed.
- Sign and file. Sign the agreement, file the new articles and any allotment returns at Companies House and update the registers, including the PSC register.
- Bind newcomers. Require every new shareholder to sign a deed of adherence before shares are issued or transferred to them.
Illustrative scenario: three founders and an investor
This scenario is illustrative only and uses generic parties.
Three founders hold equal shares in a software company. An angel investor agrees to subscribe for a minority stake. Before completion, the parties sign a shareholder agreement and adopt new articles. The investor obtains a board seat, information rights and a short list of reserved matters, including new share issues and borrowing above an agreed limit. Founders' shares vest over four years, with good and bad leaver pricing.
Eighteen months later, one founder resigns to join a competitor. Because he is a bad leaver for his unvested shares, he must offer them at the lower of cost and market value, and his non-compete and non-solicitation covenants apply for a limited period. The remaining founders buy his shares through the company's pre-emption mechanism. When a trade buyer later offers to acquire the company, the drag-along clause allows the agreed majority to deliver 100% of the shares. Without a carefully drafted shareholder agreement UK company law alone would have left each of those outcomes open to dispute.
Common mistakes to avoid
Using a template that conflicts with the articles
A downloaded template rarely fits the company's articles. Inconsistent pre-emption or transfer provisions cause confusion over which rule applies and may leave the company registering a transfer the agreement prohibits. Agreements should state that they prevail between the parties and oblige shareholders to amend the articles to remove conflicts. Better still, draft both documents together and keep transfer mechanics primarily in the articles, which bind every member and the company automatically.
Leaving deadlock unaddressed in a 50:50 company
Equal shareholdings feel fair at the start but can leave the company unable to act once the founders disagree. Without a deadlock mechanism, the realistic routes are negotiation, an unfair prejudice petition or a winding-up petition on just and equitable grounds, all of which are slow, costly and damaging to the business. A tiered process of escalation, mediation and then a buy-sell mechanism gives both sides a predictable exit and a strong incentive to compromise early.
Overreaching restrictive covenants
Restrictions on competing or soliciting after exit are only enforceable if they protect a legitimate interest and are reasonable in scope, area and duration. Covenants given by sellers or substantial shareholders are judged more generously than those in employment contracts, but a blanket worldwide restriction for many years is unlikely to survive. Tailor the covenants to each shareholder's role and holding, and coordinate them with any employment contract. See our restrictive covenants page.
Forgetting to bind new shareholders
Any shareholder agreement UK law recognises binds only its parties. New investors, employees exercising options and transferees are not bound unless they sign a deed of adherence. Make adherence a condition of any issue or transfer in both the agreement and the articles, and keep a record of every deed signed. Otherwise drag rights, leaver terms and covenants may not be enforceable against the very people they were meant to cover.
Cross-border shareholders and next steps
Where shareholders are based in Bangladesh, the Gulf or Asia, the agreement should address governing law, the arbitral seat and institution, service of documents, currency of payments and how leaver or deadlock prices will be determined if valuers disagree. English law and London arbitration are a common choice; see our guide to English law in Bangladesh contracts. Enforcement of any award or judgment in the shareholders' home jurisdictions should be checked at the drafting stage.
Before signing any shareholder agreement UK founders and investors should confirm the deal terms, the reserved matters list, deadlock and exit routes, leaver definitions and dispute forum. TRW & Co's London office, authorised and regulated by the Solicitors Regulation Authority, drafts and negotiates shareholder agreements and joint venture arrangements through our corporate and joint ventures teams, and acts in shareholder disputes when relationships break down. Contact us at info@trw.co.
Frequently asked questions
01Is a shareholder agreement legally required in the UK?
No. Every company must have articles of association, but a shareholder agreement is optional. Without one, shareholders rely on the Companies Act 2006 and the articles, under which a majority holder controls ordinary resolutions and board composition, and a minority has limited protection beyond statutory rights and an unfair prejudice petition. Any company with more than one owner, and especially one with investors or equal shareholders, benefits from agreeing clear rules at the outset.
02What is the difference between a shareholder agreement and articles of association?
Articles are the company's public constitution, filed at Companies House and binding on the company and all members under section 33 of the Companies Act 2006. They can be amended by a 75% special resolution. A shareholder agreement is a private contract between its parties. It is confidential, usually needs unanimous consent to change, and is enforced as a contract. Most companies use both, keeping share rights and transfer mechanics in the articles and commercial protections in the agreement.
03What are drag-along and tag-along rights?
A drag-along right allows holders of a specified majority to compel the remaining shareholders to sell their shares to a third-party buyer on the same terms, so a buyer can acquire 100% of the company. A tag-along right protects minority shareholders by allowing them to join a sale of a controlling stake on the same terms. Key negotiation points are the drag threshold, minimum price, form of consideration and the warranties dragged shareholders must give.
04What is a good leaver and a bad leaver?
These terms describe a shareholder, often a founder or employee, who stops working for the company. A good leaver, for example someone who leaves because of death, ill-health or dismissal without fault, typically sells their shares at market or fair value. A bad leaver, such as someone who resigns early or is dismissed for misconduct, may have to sell at the lower of cost and market value. Definitions and vesting schedules must be drafted precisely to avoid disputes.
05Can a shareholder agreement stop a director being removed?
Not completely. Section 168 of the Companies Act 2006 allows shareholders to remove a director by ordinary resolution notwithstanding any agreement. However, shareholders can agree among themselves how they will vote, articles can give weighted voting rights on a removal resolution, and the agreement can provide consequences, such as a buy-out right, if an appointed director is removed. These tools protect board representation without contravening the statute.
06How much does a shareholder agreement cost in the UK?
Cost depends on the number of parties, the complexity of the share structure, whether new articles are needed and how much negotiation is involved. A simple agreement between founders costs much less than an investor-led agreement with preference shares, vesting and detailed reserved matters. TRW & Co does not publish fixed fees; we agree a scope and estimate at the outset so clients understand the likely cost before work begins.
Sources and official materials
- Companies Act 2006, section 561 — Existing shareholders' right of pre-emption
- Companies Act 2006, section 168 — Removal of directors by ordinary resolution
- Companies Act 2006, section 994 — Unfair prejudice petitions
- The Companies (Model Articles) Regulations 2008 — Default model articles for private companies
- Memorandum and articles of association — GOV.UK guidance on company articles
- Arbitration Act 2025 — Amendments to the Arbitration Act 1996
General information only, current as at 21 October 2026. It is not legal advice and does not create a solicitor–client relationship. It reflects the law of England and Wales unless stated otherwise; Scotland and Northern Ireland have separate legal systems, and the law changes frequently. Check current official sources and take advice on the facts of your matter.