An offering memorandum is a legal document that discloses the terms, conditions, risks, and other information about a private placement. It is not the same thing as a prospectus (those are for issuances of publicly-traded securities). The prospectus must be approved by the competent authority in the United Kingdom, which is currently the Financial Conduct Authority (FCA) in its capacity as the United Kingdom Listing Authority. If the purpose of the prospectus is to induce people to engage in an investment activity, it will also need to be issued or approved by an 'authorised person' or it will constitute an unlawful financial promotion under section 21 of the Financial Services and Markets Act 2000. Publication of information in relation to the issue of securities in the United Kingdom is governed by the Prospectus Rules, which implement the European law Prospectus Directive. A prospectus must be published where certain types of securities either are offered to the public or are requested for admission on a regulated market. The company begins by working with an investment bank or banker to draft an offering memorandum. This memorandum complies with securities laws outlined by the Securities and Exchange Commission (SEC). Being a former banker and a recent PE joinee, this hits bang on the spot. Brings back my memories of the CIM prep (we generally refer to it as IM in India) with other fellow associates, sitting late into the night, chatting, fighting (even on points like font sizes) and positioning the company, taking pride in our work till the next day the VP turns and asks to completely re-draft the whole thing.. If a company has been filing Form 10-K with the SEC for a certain period of time, has a market capitalization above a certain threshold, and takes certain procedural steps, it is permitted to offer securities using a simplified prospectus that incorporates information by reference to its SEC filings. In certain situations, such as when the offering is not required to be registered with the SEC, a prospectus is instead referred to as an "offering memorandum" or "offering circular." In the case of municipal securities offerings, which are generally exempt from most of the federal securities laws, municipal issuers typically prepare an analogous form of disclosure document known as an "official statement." Prospectuses are generally prepared with the assistance of the underwriter acting as issue manager (also called a bookrunning manager or "bookrunner").