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Access all documents on Initial public offering (IPO)

Initial public offering (IPO) meaning

What does Initial public offering (IPO) mean?
An initial public offering (ipo) is the first time a privately held company goes public by offering shares to investors and having them admitted to trading on a stock exchange or other public market. It is a market term (not defined in statute), with the underlying concepts (offers to the public and admission to trading) governed in the UK by FSMA 2000, the UK Prospectus Regulation and the FCA Listing Rules, and in Ireland by the EU Prospectus Regulation (Central Bank of Ireland as competent authority) and Euronext Dublin rules; usage is broadly consistent across the UK and Ireland. IPOs typically combine a primary issue (raising equity capital) with a secondary sell-down by existing shareholders, and can provide an exit or partial liquidity for founders and private equity sponsors. They may involve the Main Market of the London Stock Exchange or Euronext Dublin (regulated markets), or growth markets such as AIM or Euronext Growth (MTFs), where a prospectus may not be required but an admission document and exchange rules apply. Key legal features include due diligence and verification, an FCA/CBI-approved prospectus (unless exempt), underwriting/bookbuilding, eligibility and governance requirements, shareholder lock-ups, and ongoing disclosure and market abuse compliance.
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View the related Practice Notes about Initial public offering (IPO)

PRACTICE NOTES
UK Employee Share Schemes on Interposing a New Holding Company: EMI, CSOP, SAYE, SIP, Rollover and Tax Considerations

Why do companies have reorganisations? Groups of companies carry out reorganisations for numerous and varied reasons. These steps will frequently have implications for existing share plans and other employee equity arrangements. In some instances, the consequences are commercial in nature. Examples include: the reorganisation prompting early vesting, exercise and/or lapse of awards because the relevant provisions in the share plan rules on a change in control of the parent company, or on the participant’s employment ending, have been engaged; and a requirement for awards over shares in the current parent to be swapped for awards over shares in a newly formed parent company. In certain situations, if the right steps are not taken within a defined period, valuable tax advantages may ultimately be lost entirely. Common types of reorganisation The most frequent forms of reorganisation include the following: placing a new group holding or parent entity above an existing company or group, often to enable an initial...

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PRACTICE NOTES
Transferring businesses and subsidiaries within a group: share scheme implications for SIP, SAYE, CSOP, EMI, eligibility, corporation tax and redundancy

Introduction Groups of companies carry out reorganisations for numerous and varied reasons; however, whatever the motivation, such changes frequently influence existing share plans and other employee equity arrangements. At times the effect is commercial, yet it is important to take care that any valuable tax advantages are not forfeited. transferring the business of one group company to another group company, often arising from an acquisition or to enable the sale of a specific part of the business and its assets transferring the shares of one subsidiary to another subsidiary so the group achieves the most suitable structure, often following an acquisition or sale of a business, and inserting a new group holding or parent company above an existing parent company, typically to facilitate an initial public offering (IPO) or a new third-party investment, without any change to the group’s ultimate ownership This Practice Note concentrates on the first two forms of reorganisation mentioned above. For details on the impact of placing...

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PRACTICE NOTES
UK IPOs: Managing Employee Share Incentives—Existing Plans, New Schemes, Prospectus Disclosures, HMRC Valuations, Employee Offers, Lock-ups, Corporate Reorganisations and Communications

Introduction An initial public offering (IPO) is a company’s first sale of shares to the public. For more on what an IPO entails, see: IPO—Main market—overview. A business heading towards an IPO must assess the effect on any employee share arrangements it runs. This analysis should begin at the earliest planning stage, as the IPO structure may need to reflect share plan considerations. An IPO also creates a chance to launch new share schemes—often extending participation to all staff for the first time—and it is usually best for those arrangements to be established before the company’s shares are officially admitted to trading. Organisations may likewise wish to make awards or run an employee offer at the point of listing. Doing so demands advance preparation, with suitable disclosures built into the prospectus. This Practice Note outlines the key points that typically arise on employee incentives in an IPO and the steps that are commonly required. It covers both current and newly introduced schemes, points of timing ahead of admission, and...

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View the related Precedents about Initial public offering (IPO)

PRECEDENTS
UK Main Market (LSE) IPO timetable: Official List listing and admission to trading; includes COBS 11A research steps; reflects pre-2026 prospectus regime with notes on 2026 reforms

STOP PRESS : Significant reforms to the UK prospectus regime came into force on 19 January 2026. The updated rules for public offerings of securities and UK admissions to trading are principally contained in the Public Offers and Admissions to Trading Regulations 2024, SI 2024/105 (the POATRs), and the FCA sourcebook, The Prospectus Rules: Admission to Trading on a Regulated Market (PRM). The UK Prospectus Regulation and the FCA Prospectus Regulation Rules have been repealed in full. The package is intended to streamline capital-raising and markedly reduce the number of occasions when a company must issue an FCA-approved prospectus for any subsequent or further share offering. For full details of the changes, see Practice Note: UK prospectus regime reform. This Practice Note describes the prospectus regime that applied before 19 January 2026. This precedent provides an illustrative timetable for a company carrying out an IPO of equity shares in the UK, seeking admission to trading on the Main Market of the London Stock Exchange, and obtaining a listing of...

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