3i Infrastructure plc is an investment firm focused on infrastructure investments. It targets core infrastructure companies and assets in utilities, transportation, energy, social infrastructure and adjacent sectors, including primary PPP greenfield projects in education, transport and healthcare, public sector accommodation, and low-risk energy projects such as wind, solar and offshore transmission in developed markets. The firm invests mainly in unquoted companies, though it may also invest in listed companies, and seeks opportunities worldwide with an initial focus on Europe, North America, Asia and the United Kingdom. Individual investments generally exceed £50 million, with typical ranges of £5 million to £50 million in the primary PPP sector and £50 million to £250 million in low-risk energy projects within mid-market economic infrastructure. It seeks board representation and may take controlling interests, and typically exits investments after 20 to 30 years. Founded on January 16, 2007, 3i Infrastructure plc is based in St. Helier, Channel Islands, with an additional office in London, United Kingdom.