Mainstream targets energy major status by 2030
New ownership positions renewables project developer for transition to long-term asset owner and operator
Ireland-based Mainstream Renewable Power plans to scale up its portfolio of assets “very quickly” as it aims to transition from project developer to global renewable energy major by the end of the decade, group CEO Mary Quaney tells Transition Economist. The growth strategy comes after Mainstream, which was formed in 2008, completed a change of ownership last year that gave Norway’s Aker Horizons a 75pc share, with Japan’s Mitsui also coming in as a strategic investor alongside Aker earlier this year. “The ambition to grow the portfolio of assets that we have today is very significant,” Quaney says. “But we have the track record to do it. And now with our shareholders, Aker Horizons and Mit
Also in this section
2 January 2026
This year may be a defining one for carbon capture, utilisation and storage in the US, despite the institutional uncertainty
23 December 2025
Legislative reform in Germany sets the stage for commercial carbon capture and transport at a national level, while the UK has already seen financial close on major CCS clusters
15 December 2025
Net zero is not the problem for the UK’s power system. The real issue is with an outdated market design in desperate need of modernisation
28 November 2025
The launch of the bloc’s emissions trading system in 2005 was a pioneering step, but as the scheme hits 21 its impact as a driver of decarbonisation is still open to debate






