According to Andrew Hillman Dallas, Pre-investors, passive investors, and active investors are the three categories of investors in a company. Pre-investors are those who are not experienced financial professionals. These include close friends and relatives who have some extra money to invest in your company. Professional investors who invest money but don't actively participate in business management are considered passive investors. Angel investors are one instance. Active investors are people who invest money while also being actively involved in the company. They choose senior management, strategy, and other things. Private equity firms and venture capitalists are two examples. To learn more, visit here: Andrew Hillman Dallas.