What Is a Share? Definition for UK Business Owners and Startups

If you’re building a UK business, sooner or later you’ll hear someone say: “We should issue shares”, “We need to sort the cap table”, or “Investors will want equity.”

And while it can sound technical (and a bit intimidating), the basics of what a share is are actually pretty straightforward once you break it down.

In this guide, we’ll explain what shares are in plain English, how they work in UK companies, what you’re really giving away when you issue shares, and the legal documents you should have in place so you’re protected from day one.

What Is A Share (In Plain English)?

A share is a unit of ownership in a company.

So if your company has issued 100 shares in total and you own 60 of them, you will usually own 60% of the company. That ownership can come with certain rights (like voting on key decisions and receiving dividends), depending on how the shares are set up.

In the UK, shares are most commonly discussed in the context of a private company limited by shares (a “Ltd” company). If you’re a startup planning to raise investment, or you want to bring in a co-founder, shares are typically how ownership is recorded and exchanged.

Why Shares Matter For Small Businesses

Shares aren’t just a formality for big corporates. They affect:

• Who owns the business (and by how much)
• Who controls decisions (voting power)
• Who benefits financially (dividends and sale proceeds)
• How you bring people in (co-founders, investors, key hires)
• How you protect what you’ve built (rules for exits and disputes)

This is why getting the share structure right early on can save you a lot of stress (and expensive fixes) later.

What Rights Does A Share Usually Give Someone?

When someone owns shares, they’re a shareholder (also called a “member”). But being a shareholder isn’t the same as being a director or an employee.

Shares typically give a person some combination of the following rights (depending on the share class and your company’s documents):

1) Voting Rights

Many shares carry voting rights, which allow shareholders to vote on matters such as:

• appointing or removing directors
• approving certain major changes to the company
• authorising new shares (or other funding arrangements)

Voting usually happens via shareholder resolutions. In practice, the bigger your shareholding, the more voting power you tend to have.

2) Dividend Rights

Shares can entitle shareholders to receive dividends (a distribution of company profits). Dividends are not automatic, and for many early-stage startups they don’t happen for a while (because profits are reinvested).

Also, dividends must be paid lawfully (for example, generally only out of distributable profits). This is a common area where founders want to move fast, but it’s worth getting proper advice.

3) Rights On A Sale Or Winding Up

If the company is sold, shareholders are usually entitled to receive a share of the sale proceeds (after debts and costs), based on what they own and what the share terms say.

Similarly, if the business closes and the company is wound up, shareholders may have rights to remaining assets (again, depending on the share class and the company’s financial position).

4) Information And Participation Rights

Shareholders may have rights to receive certain information, attend general meetings, and vote. But these rights can vary a lot depending on:

• your Company Constitution (Articles of Association)
• any shareholder deal you’ve agreed privately (more on this below)
• the class of shares issued

That’s why “shares” aren’t just a number - they’re a bundle of legal rights that need to be clearly defined.

How Do Shares Work In A UK Limited Company?

In a UK private limited company, shares are typically “issued” by the company to shareholders in accordance with the Companies Act 2006 and the company’s own documents. This is different from simply agreeing informally that “we’re 50/50” - legally, the company’s share register and Companies House filings matter.

Issued Shares Vs Authorised Shares

Most UK founders focus on issued shares (the shares that have actually been issued to shareholders).

Historically, companies also talked about “authorised share capital”. For most UK private companies today, what matters in practice is:

• what your Articles say about issuing shares (and who has authority to do it)
• whether any statutory or contractual pre-emption rights apply (so existing shareholders get first refusal)
• how many shares have been issued
• who owns them
• what rights they carry

Share Capital And Nominal Value

Many companies issue shares with a nominal value (for example, 100 shares at £0.01 each). This nominal value is not the same as the market value of your company.

For example, a company might issue 100 shares at £0.01 each (so share capital is £1), but the business might later be valued at £1,000,000. The nominal value is more of a legal/accounting concept than a reflection of what the business is “worth”.

Where Share Ownership Is Recorded

Share ownership is usually evidenced through:

• the company’s statutory registers (especially the register of members)
• Companies House filings (like confirmation statements)
• share certificates (helpful evidence, though not the only record)

If you’re planning to raise capital or sell the business later, clean and accurate records are essential. Due diligence almost always involves checking share history and whether shares were issued/transferred properly.

Do All Shares Have To Be Equal? (Share Classes Explained)

No - shares don’t all have to be the same.

Many startups begin with one class of “ordinary” shares. But as your business grows (especially if you take on investment), you might create different share classes with different rights.

Common Share Types In UK Startups

• Ordinary shares – typically the standard founder shares, often carrying voting and dividend rights.
• Non-voting shares – may receive dividends but don’t vote on company decisions.
• Preference shares – commonly used for investors; may have priority for dividends or on a sale.

There’s no one-size-fits-all setup. The “best” structure depends on what you’re trying to do: retain control, raise funds, incentivise a team member, or protect the business if someone leaves.

Where The Rules About Share Classes Live

The rights attached to shares are usually set out in:

• the company’s Articles of Association (and any amendments)
• the terms of any investment documentation
• your shareholder arrangements

If you’re changing share rights, issuing a new class, or making promises to investors, it’s worth getting advice early. Fixing a messy share structure later can be time-consuming and expensive.

When Do Business Owners Issue Or Transfer Shares?

As a founder, you’ll usually come across shares when you do one of the following:

1) Starting The Company With A Co-Founder

You might agree to split ownership 50/50, 60/40, or another arrangement. What matters is documenting it properly and thinking ahead about “what if” scenarios.

For example: what happens if a co-founder stops contributing, wants to exit early, or there’s a disagreement about direction? This is where a Shareholders Agreement can make a huge difference, because it can set ground rules around decision-making, share transfers, and exits.

2) Bringing In An Investor

Investment often involves issuing new shares (which dilutes existing shareholders). Investors may also negotiate special rights (like preference shares, veto rights, or anti-dilution provisions).

If you’re issuing shares to investors, you may use a formal Share Subscription Agreement to document the deal, including the price paid and any conditions that must be met before shares are issued.

3) Giving Shares To Employees Or Advisors (Equity Incentives)

Some startups give equity to attract talent when cash is tight. This can be done in different ways (for example, direct shares, options, or a more structured incentive scheme).

Be careful here. Giving away shares is a permanent ownership change (unless you have a proper buy-back mechanism and the legal right to use it). It’s one of those areas where “we’ll figure it out later” can quickly turn into a real dispute. Also, employee equity can have tax and regulatory implications, so it’s sensible to take both legal and tax advice before you implement anything.

4) Transferring Shares Between Owners

Share transfers happen for all sorts of reasons - a founder leaves, a shareholder sells, or you’re restructuring ownership.

To transfer shares, you’ll typically need proper paperwork and internal approvals (depending on your Articles and any shareholder deal, and in some cases pre-emption rights). This is often done using stock transfer documentation and recorded correctly in company registers; in practice, many businesses also use a Share Transfer process to make sure the legal steps are followed.

5) Buying Back Shares

Some companies buy back shares from a departing shareholder (for example, to avoid having an inactive shareholder on the cap table). This can be useful - but share buybacks have strict rules and aren’t something to DIY.

If a buyback is on the cards, it’s worth getting advice on the right structure and paperwork, including a proper Share Buyback Agreement where appropriate.

What Legal Documents Should You Have When Dealing With Shares?

Shares can be a great tool for growth, investment, and motivation - but only if the legal foundations are solid.

Here are the key documents and considerations we regularly see UK founders needing.

Articles Of Association (Your Company Rules)

Your Articles are essentially the rulebook for how your company operates, including:

• how shares can be issued (and any pre-emption rights or approval requirements)
• whether directors can refuse share transfers
• what shareholder decisions need approval and how voting works
• how different share classes are treated

If you haven’t reviewed your Articles since incorporating, you might be relying on standard template rules that don’t match your business reality.

A Shareholders Agreement (The “Real World” Deal Between Owners)

Articles are public (filed at Companies House). A Shareholders Agreement is usually private and can be tailored to the commercial deal you actually want.

It often covers:

• how decisions are made (and which decisions require unanimous consent)
• what happens if someone wants to leave
• restrictions on selling shares to outsiders
• deadlock resolution (what happens if you can’t agree)
• protection for minority shareholders (or protection for founders retaining control)

If you’re splitting equity between multiple people, this document is one of the best investments you can make early.

Board And Shareholder Resolutions

Issuing shares, approving transfers, and other equity actions often need formal approvals. If you skip these steps, you can end up with shares that were never properly issued or transferred - which is exactly the kind of thing that causes problems during fundraising or a sale.

Many companies use a Directors Resolution (and, where needed, shareholder resolutions) to document decisions properly.

Share Transfer And Stock Transfer Paperwork

If you’re moving shares from one person to another, you’ll usually need:

• a written transfer document
• to update the company’s register of members
• to issue a new share certificate (where relevant)
• to make any Companies House updates that apply

There can also be tax considerations (for example, stamp duty may be payable on some share transfers depending on the price and circumstances), so it’s worth checking before you sign anything.

Clear Contracts Around Equity-Linked Arrangements

Founders sometimes promise equity informally - over email, on a call, or in a short message - and then get surprised when it later becomes a dispute.

As a general rule, if you’re making promises about ownership, put it in a proper agreement and make sure it meets the requirements of a legally binding contract so it’s enforceable and clear.

Special Situations: Gifting Shares

Sometimes shares are transferred as a gift (for example, to a family member as part of estate or succession planning, or between co-founders as part of a restructure).

This can still involve legal steps and tax consequences, so it’s not something to do casually. If this is your scenario, it’s worth carefully planning the gifting of shares so you don’t accidentally create liabilities or lose control of the company.

Key Takeaways

• A share is a unit of ownership in a UK company, and it usually comes with rights like voting, dividends, and a share of proceeds on a sale.
• Shares aren’t always equal - different share classes can carry different rights, and the detail matters (especially when you raise investment).
• Issuing shares to co-founders, investors, employees, or advisors can help your business grow, but it also changes ownership and control.
• Your Articles of Association and Shareholders Agreement are the core documents that control what shareholders can (and can’t) do.
• Share issues, transfers, and buybacks should be documented properly with resolutions and correct paperwork, otherwise you can run into serious problems later (often during fundraising or a sale).
• If you’re unsure how to structure equity or document it, getting tailored legal advice early is usually far cheaper than fixing it later.

Note: This article is general information only and isn’t tax, accounting, or financial advice. If you’re dealing with dividends, employee equity, share transfers, or gifting shares, it’s a good idea to take tax advice as well as legal advice.

If you’d like help structuring your shares, bringing in a co-founder or investor, or putting the right documents in place, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.