3i Group Plc engages in investment management, focused on mid-market Private Equity, Infrastructure, and Debt Management. It operates through three business lines segments: Private Equity, Infrastructure, and Debt Management. The Private Equity business segment focuses on investing in northern Europe, North America and Brazil. The Infrastructure business segment focuses on investing in utilities, transportation and social infrastructure in Europe. The Debt Management business segment specializes in the management of third-party capital, invested in non-investment grade debt in Europe and the United States. The company was founded in 1945 and is headquartered in London, the United Kingdom.