A Person with Significant Control (PSC) refers to an individual who has a significant influence or control over a company. This concept was introduced by the UK government to increase transparency and accountability in corporate governance. Anyone with more than 25% of shares in a limited company is automatically a PSC; however, people or corporate entities with less than 25% of shares in a company may still qualify as a PSC.

The PSC register is a legal requirement for all UK companies, and it aims to identify and record the individuals who ultimately own or control a company. The information on the PSC register includes details such as the individual's name, date of birth, nationality, and nature of control. This register is publicly accessible and provides valuable information for investors, creditors, and other stakeholders to understand the ownership and control structure of a company.