How UK startup exits actually work: trade sale, acquisition and IPO explained

An exit is simply the point at which a startup’s founders and investors convert their shareholding into cash, or into shares in another, usually larger, company. In the UK, the overwhelming majority of exits happen through a trade sale or acquisition rather than a public listing, and the mechanics of who gets paid what, and in which order, are usually decided by terms agreed years earlier, not at the point of sale itself. Understanding the main routes, and how the payout waterfall actually works, makes it much easier to judge whether a given outcome is genuinely a good one.

What are the main exit routes for a UK startup?

The three main routes are a trade sale, where another operating company buys the business, a financial acquisition, where a private equity firm or similar investor buys it, and an initial public offering (IPO), where the company lists its shares on a public stock exchange. Trade sales and acquisitions are by far the most common route by volume, while an IPO remains comparatively rare and is generally only realistic for companies that have reached significant scale and revenue predictability. Research from market intelligence platform Tracxn found that annual UK tech acquisitions fell from a post-pandemic high ofundefinedinundefinedtoundefinedin 2025, with more than 2,900 UK startups and scale-ups acquired in total since 2021, and it noted that with the IPO window volatile throughout 2025, acquisitions became the dominant exit route for maturing UK startups.

How does a trade sale or acquisition actually work?

In a trade sale, a buyer, typically a larger company in the same or an adjacent industry, agrees to buy some or all of the target company’s shares (a share sale) or, less commonly, its underlying business and assets (an asset sale), usually after a period of due diligence covering the target’s finances, contracts, intellectual property and legal position. Once the deal completes, the target company legally becomes owned, wholly or partly, by the buyer, and the company must notify Companies House of the resulting changes to its shareholders and share structure, generally through its next confirmation statement or, where new shares are issued as part of the deal, a return of allotment on form SH01 within one month of the allotment, according to GOV.UK’s guidance on company filings. A trade sale can be paid entirely in cash, entirely in the buyer’s own shares, or a mix of both, and it is common for a portion of the price to be held back or made conditional on the founders staying on for a defined period afterwards, an arrangement usually called an earn-out.

What is a liquidation preference, and why does it matter at exit?

A liquidation preference is a right, typically held by preferred shareholders such as venture capital investors, to be paid a set amount from the exit proceeds before ordinary shareholders, including founders and most employees, receive anything. Under a standard 1x non-participating structure, the most common form in the UK, an investor simply chooses whichever is higher: getting their original investment amount back, or converting to ordinary shares and taking their proportional share of the total proceeds instead, according to HSBC Innovation Banking’s analysis of UK term sheet data. That analysis found 90% of UK preference shares were non-participating as of 2025, up slightly from 87% in 2024, and that 96% of non-participating preference shares carried a straightforward 1x multiple, both considered relatively founder-friendly market norms; a “participating” preference, by contrast, lets the investor take their preference amount and then still share in what is left over, which reduces what is available for founders and other ordinary shareholders in a smaller or lower-value exit.

Because these preferences stack up across multiple funding rounds, with each round’s investors typically sitting somewhere in the payout order relative to the others, founders in a company that has raised several rounds should expect the proceeds waterfall to be genuinely complex, and it is worth having a lawyer or adviser model out likely outcomes at different exit values well before a sale process starts, not after an offer arrives.

How does the IPO route work in the UK, and what does it actually require?

An IPO involves listing the company’s shares for trading on a public stock exchange, with London’s main options being the Main Market of the London Stock Exchange, generally reserved for larger, more established businesses, and AIM (the Alternative Investment Market), a market designed specifically for smaller and growth companies. AIM has notably fewer formal size or profitability requirements than the Main Market: there is no minimum market capitalisation or public float requirement for most companies, but an applicant must be able to show it has sufficient working capital for at least theundefinedmonths following admission, must generally provide audited accounts for its last three financial years (or fewer if it has traded for less), and must appoint and retain a nominated adviser, a firm regulated by the London Stock Exchange that vouches for the company’s suitability to be listed, according to a summary of the AIM rules published by law firm Baker McKenzie. Because of the ongoing cost and regulatory burden of being a public company, an IPO is generally a route only well-capitalised, mature scaleups pursue, and it is far less common than a trade sale as an exit for the typical UK venture-backed startup.

What do founders and investors actually get?

What any individual founder or investor actually receives at exit depends on their percentage ownership at that point, adjusted for any liquidation preferences ahead of them in the payout order, minus any deal costs and, where relevant, any amount held back in an earn-out. This is why the cumulative effect of dilution across every funding round, and the specific liquidation preference terms agreed at each of them, matters so much more at exit than it might have seemed to at the time the round was signed. A founder who has raised several rounds at reasonable, founder-friendly terms can still end up with a meaningful stake at exit, but the only way to know what a given offer is actually worth to you personally is to model the full waterfall against your own cap table, not just look at the total headline deal value.

The practical takeaway

Because so much of what happens at exit is decided by terms agreed at funding stage, the most useful time to think seriously about exit mechanics is well before a deal is on the table, when negotiating liquidation preferences, option pool terms and board composition at each funding round. When an actual exit process does begin, independent legal and financial advice on the specific waterfall for your company’s cap table is essential, since generic explanations like this one cannot substitute for a calculation based on your company’s real numbers.