Caledonia Investments Plc is a self-managed investment trust company, which engages in managing quoted, unquoted, funds, and income and growth investment pools. It operates through the Investment Portfolio and Other Investments segments. The Investment Portfolio segment consists of quoted, income, unquoted, and funds pools. The Other Investments segment includes subsidiaries not managed as part of the investment portfolio. The company was founded in December 1928 and is headquartered in London, the United Kingdom.