Infinis produces electricity from captured landfill and mineral methane.

The parent company, Terra Firma Capital Partners, then sold WRG in July 2006 while retaining Infinis.

[3] After seven years of ownership by Terra Firma Capital Partners, the company was the subject of an IPO (initial public offering) in November 2013.

[4] Ian Marchant, formerly CEO of Scottish and Southern Energy, was appointed Independent Chairman of the Infinis Board, in September 2013 in the run up to the IPO.

[6] Following the acquisition of the landfill gas business by 3i on 8 December 2016, Shane Pickering was appointed Chief Executive of Infinis and Director to the boards of the two new governing companies.