The extent of any exercise undertaken to investigate a limited company in the United Kingdom will partly depend on whether the company in question is private or public, and, if public, whether its securities are listed on an exchange or alternative trading platform. A listed company is generally required by the rules of the exchange to make available a wider range of information beyond that required by private or unlisted public companies. Information sources for all companies and individuals Companies House The most obvious place to start when investigating a company in the UK is Companies House. A search at Companies House will, free-of-charge, provide a substantial amount of information filed in relation to a company’s constitution, registered address and date of incorporation, current and previous officers, people with significant control (PSCs), mortgage charge data, previous company names, accounts and insolvency information. Key services at Companies House include Search the register, Advanced company search and Dissolved company search (for information on a company which was dissolved more than ten years ago). To order certificates and certified