3i Infrastructure plc is an investment trust headquartered in Jersey.

It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.

[2] The company was launched by way of an initial public offering in 2007.

[3][4] Its early investments included Anglian Water Group and Oiltanking GmbH's terminal facilities in the Netherlands, Malta, and Singapore.

[6] Since 2021, the company’s new investments have included SRL Traffic Systems, a UK manufacturer and supplier of temporary traffic equipment, and Global Cloud Xchange.