Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
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When you’re starting (or growing) a business in the UK, one of your first and most important decisions is what type of company structure to set up. Two of the most common choices are the public limited company (PLC) and the private limited company (Ltd). But what exactly do these terms mean, and how do you decide which one makes the most sense for your business goals?
Both company types offer limited liability-meaning your personal assets are protected from business debts-but there are some major differences in regulation, reporting, and how shares are managed. Get these choices wrong, and you could face more compliance headaches than you bargained for. That’s why laying the right legal foundations early is so crucial for any UK business owner or founder.
In this guide, we’ll take you through the key differences between public and private limited companies in the UK. Whether you’re planning a modest local business or aiming for the FTSE, understanding the legal and practical distinctions is vital-keep reading to find out what you need to know.
What Is a Public Limited Company (PLC)?
Let’s start with the basics: what is a public limited company? In UK business law, a public limited company (PLC) is a business entity that can offer its shares to the public, meaning anyone can potentially buy a stake in the business, often via a stock exchange. Here’s how that looks in practice:- The company’s name always ends with “PLC” (for example, “Sprintlaw Solutions PLC”).
- Shares can be traded openly by members of the public-that’s what makes them “publicly held companies”.
- They’re often larger businesses or those with significant plans to raise capital from a wide pool of investors.
- There’s a minimum share capital requirement (at least £50,000, and a quarter must be paid up before starting business).
What Is a Private Limited Company (Ltd)?
If you’re a small business, startup or family-owned enterprise, there’s a good chance you’ll be looking at a private limited company structure instead. So, what is a private limited company and how does it work?- The company’s name ends with “Limited” or “Ltd” (example: “Sprintlaw UK Ltd”).
- Shares cannot be sold to the general public-they’re typically held by founders, families, or private investors.
- There’s no minimum share capital required to set up a private limited company.
- Moving shares between parties is tightly controlled and usually requires director or shareholder approval.
What Are the Main Differences Between Public and Private Limited Companies?
Both company structures are “limited companies”, meaning shareholders have limited liability. However, several legal, administrative, and financial differences could have a major impact on how your business operates and grows. Let’s look at the most important differences side by side.1. Share Capital and Ownership Rules
- Public Limited Companies (PLCs): Must have at least £50,000 in share capital-and at least 25% (£12,500) must be paid up before starting business. Shares can be offered or traded to the public. New shares must often be paid for in cash (or assets independently valued before issue).
- Private Limited Companies (Ltds): No legal minimum share capital. Shares can only be transferred privately, usually with board or shareholder approval. You control who becomes a shareholder.
2. Access to Investment and Fundraising
- PLCs: Can “go public” by listing shares on the London Stock Exchange or similar, raising capital from anyone in the public. This route is typically for ambitious companies looking for rapid expansion, major growth, or exposure to large investors.
- Ltds: Raise money privately-common sources include founders, friends and family, venture capital, or private equity. No access to public capital markets. This also means less public scrutiny and reporting requirements.
3. Financial Disclosure and Reporting Requirements
- PLCs: Face strict reporting obligations under the Companies Act 2006 and rules set by the Financial Conduct Authority. Annual accounts must be audited, published, and presented to shareholders within six months. Public companies are also required to announce key information that could affect share price (“continuous disclosure”).
- Ltds: Required to file annual accounts with Companies House, but the rules are less strict and many small companies do not need formal audits. Reports don’t need to be published as widely, and the process is more private.
4. Company Officers and Secretarial Requirements
- PLCs: Must have a minimum of two directors and a qualified company secretary. The company secretary is responsible for overseeing compliance, organising meetings, and making sure directors fulfil their legal duties.
- Ltds: Only one director is required and there’s no legal requirement for a company secretary (although many still appoint one for support).
5. Regulation of Directors’ Powers and Loans
- PLCs: Stricter controls apply to directors. For example, any loan from a public company to a director must be pre-approved by shareholders. Directors are subject to detailed disclosure rules and more oversight, both for internal governance and by external regulators.
- Ltds: There’s greater flexibility with internal decisions like director loans, though these are still regulated. Private companies can make certain decisions faster and more informally.
6. Takeovers and Mergers
- PLCs: Subject to the City Code on Takeovers and Mergers, which ensures any bid to acquire the company follows strict rules, giving all shareholders fair treatment and access to information. Overseen by the City Takeover Panel.
- Ltds: Generally not covered by the City Code (except in rare cases) and can negotiate and agree to acquisitions more privately.
7. Examples of Public and Private Limited Companies
- Public Limited Companies: Shell PLC, Rolls-Royce Holdings PLC, HSBC Holdings PLC.
- Private Limited Companies: Dyson Ltd, JCB Ltd, Specsavers Optical Group Ltd.
Why Choose a Public Limited Company?
Setting up a PLC comes with greater regulation and cost, but there are some compelling advantages if your business is aiming big:- Huge fundraising potential – tap into public capital markets for expansion
- Increased profile and credibility – being listed can reassure customers, partners, and suppliers
- Shares are more liquid – easier to buy/sell (sometimes even attracting top talent with share schemes)
- Acquisition currency – you can use shares for taking over other firms
- Succession and continuity – ongoing share trading means the business can outlast individual founders
- Much higher regulatory and reporting burden
- Public scrutiny-your financials, leadership and decisions are on show
- Risk of hostile takeovers
- More expensive to maintain (audits, advisors, compliance, insurance, etc.)
Why Choose a Private Limited Company?
If you’re starting out-or want to keep things nimble and under closer control-a private limited company brings strong advantages:- Simplicity – lower costs, fewer reporting headaches, and less red tape
- Privacy – your finances and ownership aren’t on display to the world
- Control – management and shareholders can run the business on their terms, not subject to the market
- Attractive to early-stage investors (angel, family, or venture capital)
- Flexible in how you manage shares – transfers can have tight restrictions
- Limited opportunities to raise large amounts of capital compared to PLCs
- Shares are harder to trade-so not ideal if you need to incentivise a large workforce
- May appear less prestigious or established in some sectors
What Legal Documents and Compliance Steps Are Required?
No matter which structure you choose, you’ll need to register with Companies House and have a set of core legal documents. Some of the essentials for both company types include:- Articles of Association – These set out the company's internal rules. Public companies require more complex Articles than private ones.
- Shareholders’ Agreement – Greatly recommended for private companies to manage relationship between shareholders. For PLCs, public rules and market regulations mostly apply.
- Registering a Company – The process and requirements differ slightly between PLCs and Ltds.
- Ongoing Compliance – From company filings to employment law and GDPR, your responsibilities grow as your company grows.
Should I Convert from Private to Public, or Vice Versa?
As your business evolves, you might want to shift from private to public (to raise capital or expand) or from public to private (for more control and less compliance). Each transition brings challenges:- Going public – Requires re-structuring, meeting capital and governance requirements, and regulatory approval. It’s usually best for businesses with proven track records and big ambitions.
- Going private – Can offer relief from reporting obligations and market pressures but often involves complex buyouts or restructuring.
Key Takeaways
- Public limited companies (PLCs) can raise funds from the public, have stricter reporting, and must appoint a company secretary and meet minimum share capital requirements.
- Private limited companies (Ltds) offer flexibility, privacy, and lower compliance costs but can only raise money from private sources.
- PLCs suit larger businesses seeking public investment, while Ltds are ideal for smaller businesses or startups looking for control and simplicity.
- Consider the ongoing legal, reporting and governance requirements before deciding between public and private structures.
- Whichever path you choose, make sure your company documents and compliance are handled by a professional to protect your business from day one.
