Private equity (PE) is stock in a private company that does not offer stock to the general public. Instead, it is offered to specialized investment funds and limited partnerships that take an active role in managing and structuring the companies. In casual usage, "private equity" can refer to these investment firms rather than the companies in which they invest.
Private-equity capital is invested into a target company either by an investment management company (private equity firm), a venture capital fund, or an angel investor; each category of investor has specific financial goals, management preferences, and investment strategies for profiting from their investments. Private equity can provide working capital to finance a target company's expansion, including the development of new products and services, operational restructuring, management changes, and shifts in ownership and control.