LSE PISCES

The London Stock Exchange (LSE) Private Securities Market (PSM) is a secondary trading platform that operates under the UK's Private Intermittent Securities and Capital Exchange System (PISCES) framework. The initiative was developed by HM Treasury, the Financial Conduct Authority (FCA) and the London Stock Exchange [14,18]. London Stock Exchange plc (RIE) was approved by the FCA on August 26, 2025 to operate a PISCES platform as a regulatory sandbox entrant (FRN 207386) — this approval covers sandbox operations only and is not a Part 4A FSMA authorisation or permanent market authorisation [2,3,5]. The PISCES sandbox regime is intended as a temporary testing environment; current arrangements run to mid-2030 while the permanent regime is worked up [7]. The PSM launched its first auction cycle in early 2026, with the platform's initial live events reported in February–March 2026 [24,23].

PSM provides intermittent, auction-style secondary trading windows for existing shares in eligible private companies, rather than continuous public-market trading [14]. Companies choose (subject to operator rules) how often to open auctions (for example monthly, quarterly or ad-hoc), and auctions may be 'Open' or 'Permissioned' depending on investor eligibility [14,20]. Investors participate via Registered Auction Agents (RAAs) who verify investor eligibility and submit orders on their behalf [14]. Companies must publish 'Core Disclosure' documents and may provide additional voluntary disclosures via a disclosure portal; this disclosure model is designed to balance privacy for private companies with investor information needs [14]. Transfers on the PISCES platform are reported as exempt from UK stamp duty and Stamp Duty Reserve Tax (SDRT) under the specific PISCES rules and associated legislation [9,14].

The PSM enables secondary market liquidity for shares in UK and overseas private companies by allowing existing shareholders (founders, employees, early investors) to sell into defined auction windows — this matters because it provides a regulated route to realise equity value without a full public listing [14]. The platform does not itself manage assets (AUM) — it facilitates matching of buyer and seller orders during auctions [14] [unverified for formal AUM statement]. Fees and incentives: standard company annual listing fees are set at £25,000 (waived for companies joining by 31 December 2026), and additional-auction fees (typically £15,000) are also waived through that date; Registered Auction Agent membership fees are waived until 31 December 2027, and trading transaction fees for RAAs are being phased in (buyer fees 0.75% from 1 July 2027; seller fees 1.00% from 1 July 2026) — these are payable to the LSE and may be passed on by RAAs to clients [12]. The phased fee schedule and waiver windows matter to early participants because they reduce upfront costs and influence take-up and liquidity in the platform's early years.

PSM is designed for institutional investors, high-net-worth individuals, certain self-certified sophisticated investors, and employees of participating companies; general retail investors are not permitted to invest directly [14,15,20]. Eligible companies are typically established private firms meeting at least two of several financial thresholds (eg, recent fundraising of £10m+, total assets of £20m+, or turnover of £10m+) though the operator retains discretion to accept other companies on a case-by-case basis — these eligibility criteria matter because they restrict listing to larger, better‑documented private companies and therefore aim to reduce information and credit risk for participating investors [14].

No FCA enforcement actions or formal public regulatory warnings specific to LSE PISCES were identified in the provided material [2,5]. Watch points for investors: early-phase platforms commonly have low initial volumes (which can limit execution and price discovery) and rules or fees may change as the sandbox evolves; bidders should confirm tax and holding‑account treatment (eg, whether PSM-traded shares can be held in SIPPs or IFISAs) directly with their RAA or a professional adviser because published guidance is incomplete on these points [unverified]. Note also there are distinct entities with similar names (for example a US-based company called LSE Pisces LLC involved in a New York interconnection dispute) that are unrelated to LSE PISCES — do not conflate these when researching or performing due diligence [Red Team].