Ask who sits on the other side of the trade and the liquidity question gets concrete fast. Four groups account for most purchases of existing shares in UK private companies: institutional investors admitted to permissioned venue auctions, dedicated secondaries funds, existing investors on the cap table, and late-stage or strategic funds entering by negotiated transfer. Until this month the first group was mostly theoretical. It now has a print.
On 22 July 2026 the London Stock Exchange announced the first transaction on its Private Securities Market: a £45m permissioned auction in which long-serving Moneybox employees sold existing shares to institutional investors, valuing the company at around £800m, with no new capital raised. Six days later Sifted reported that 9fin had completed its first employee secondary, with more than half of eligible staff selling part of their equity. Two completed employee sales in a week. This page maps the buyers behind them, and the gates between those buyers and an angel's own shares.
The Carry's read on where that leaves the market: real institutional demand is forming on the bid side, but it is one venue and a handful of prints old.
and the companies raised nothing. So far, that is the whole market.Who actually buys secondary shares in UK private companies?
Four kinds of buyer, in practice. Institutional investors on venue auctions are the newest: funds and other professional investors a company chooses to admit to a permissioned event, which is who bought in the Moneybox auction. Secondaries funds exist to buy existing stakes rather than subscribe for new shares, and tend to price against the last funding round rather than against hope. Existing investors are the quiet constant: transfer clauses commonly give them first refusal, so a stake that comes loose is usually offered to the people already on the cap table before anyone else sees it. And late-stage or strategic funds sometimes use a negotiated transfer to build a position in a company that is not raising, or to add to one they already hold.
Family offices turn up in several of those seats at once, as existing investors, as co-investors behind a lead and occasionally as direct buyers; their routes into UK startups have their own map. What unites all four groups is patience about the asset and impatience about information. A buyer of private shares cannot read a public filing, so access to the company's numbers is part of the price of every route.
How did the Moneybox sale on the Private Securities Market work?
Per the exchange's announcement, the 22 July 2026 transaction was the first on the London Stock Exchange's Private Securities Market: a £45m auction in which long-serving Moneybox employees sold existing shares to institutional investors, valuing the business at around £800m. Crowdcube acted as registered auction agent. No new capital was raised.
The mechanics matter more than the milestone. The market operates under the PISCES framework, in which trading happens in scheduled, permissioned events rather than continuously; our PISCES explainer covers the framework itself. For a buyer, permissioned means invited: the company decides which investors may take part, what information they receive and within what range orders can sit, and the auction settles at a single price. An institution gets in at a price a process discovered rather than one a negotiation produced, and the company stays private and raises nothing.
Two cautions. Moneybox and 9fin appear on this page as reported transactions, nothing more: neither company is raising, and nothing here reads on the merits of either. And one auction is one auction. It settles the question of whether the route works, not how often it will be used.
How do employees and early holders sell without a venue?
Two ways: a company-run window, in which the company lines up buyers and invites eligible holders to sell a slice, and a negotiated transfer, in which buyer and seller agree terms and the board approves the transfer. The table above sets the three routes side by side.
9fin's sale is the freshest window print. Per Sifted, the London fintech completed its first employee secondary on 28 July 2026, with more than half of eligible staff selling part of their equity, following a $170m Series C at a $1.3bn valuation. A window like that is company-controlled from end to end. The company picks the moment, the buyers and the eligible sellers, and the price is usually keyed to the last round rather than discovered by auction.
Negotiated transfers are older, quieter, the route most angels have actually used, and the most hedged by paperwork: pre-emption rights, board consent and the rest of the transfer machinery agreed at investment. The seller's timing, pricing and strategy questions are covered in our page on secondaries as liquidity before an exit; this one borrows a single point: the buyer's identity is usually settled by the documents before the market gets a say.
What decides whether a buyer ever reaches an angel's shares?
Three gates, all set long before any buyer appears: the transfer terms signed at entry, the eligibility rules of whatever window or auction the company runs, and the company's consent on the day.
- The documents. Pre-emption on transfer, board consent and permitted-transferee rules decide who may buy at all, and they were fixed the day the round closed. A buyer who cannot clear them does not exist, however keen.
- Eligibility. A permissioned auction or a tender window includes the holders the company says it includes. The 2026 prints have been employee sales; an angel's stake is in scope only if the company chooses to put it in scope.
- Ticket size and information. Institutional buyers want size and a data room. A small angel line can sit below the cheque a secondaries fund will write, which is one reason angel exits by transfer so often go to existing investors.
- Tax. A sale is a disposal wherever it happens: EIS relief goes if shares are sold within three years, and capital gains tax follows the usual rules. The tax treatment of selling angel shares has its own page.
How mature is the UK secondaries market, honestly?
Young enough to count the prints. One exchange-run venue has completed one transaction; the auctions across the wider PISCES sandbox number a handful; and the sellers have been employees, not investors. Company-run windows like 9fin's happen when a business is strong enough to attract buyers, which is precisely when holders least need the exit. Nothing yet promises an angel a route out, or a date for the next event.
The sensible way to hold all this is as evidence about plumbing, not as a plan. Institutional cheques have now demonstrably bought UK private shares through a formal process, and companies have demonstrably chosen to run one. Whether either fact ever touches a particular holding depends on documents, eligibility and consent, in that order.
And to be plain about what this page is not: it is general information, not financial advice, and not a suggestion that anyone buy or sell shares on any venue or by any route. The venture-scheme rules sit on GOV.UK, the current state of the PISCES regime sits with the FCA, and a decision about selling or buying belongs with an FCA-regulated adviser who can see your whole position.
Frequently asked questions
Who buys secondary shares in UK private companies?
Four groups account for most purchases: institutional investors admitted to permissioned venue auctions, such as the buyers in the £45m Moneybox transaction on the Private Securities Market announced by LSEG on 22 July 2026; dedicated secondaries funds that buy existing stakes; existing investors on the cap table, who often hold first refusal on transfers; and late-stage or strategic funds buying in through negotiated transfers.
What was the first transaction on the London Stock Exchange's Private Securities Market?
A £45m permissioned auction in Moneybox shares, announced by LSEG on 22 July 2026. Long-serving employees sold existing shares to institutional investors, valuing the company at around £800m, with Crowdcube acting as registered auction agent. No new capital was raised: the company stayed private and existing shares changed hands.
How do employees sell startup shares in the UK?
Through three routes: a venue auction the company arranges under the PISCES framework, as Moneybox employees did on the Private Securities Market; a company-run window, as at 9fin, where Sifted reported more than half of eligible staff sold part of their equity following a $170m Series C at a $1.3bn valuation; or a negotiated transfer approved by the board. In every case the company controls timing, eligibility and consent.
Can an angel investor sell shares through a Private Securities Market auction?
Only if the company whose shares they hold chooses to run an event and includes their holding among the shares eligible to sell. The auctions run so far have been employee sales. The company also controls which buyers are admitted and on what terms, and the transfer restrictions agreed at investment, such as pre-emption and board consent, still apply.
Is there a liquid secondary market for UK startup shares?
Not yet. One exchange-run venue has completed its first transaction, the auctions across the PISCES sandbox so far number a handful, and sellers have mostly been employees rather than investors. Treat the 2026 activity as evidence the plumbing works, not as dependable liquidity. This is general information, not financial advice: check the current rules on GOV.UK and take FCA-regulated advice before any sale or purchase.