Mary Quaney, CEO of Mainstream Renewable Power
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
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
18 November 2025
Vicki Hollub, president and CEO of Occidental, has been selected as the 2026 recipient of the Dewhurst Award, the highest honour bestowed by WPC Energy. The Dewhurst Award celebrates exceptional leadership, groundbreaking innovation and a lifetime of significant achievements in sup-port of the development and advancement of the energy industry.
11 November 2025
Transition policies must recognise that significant industrial demand for carbon will continue even as economies hit net zero
6 November 2025
After years of pursuing ideologically driven climate leadership, Western powers are now stepping back under mounting political pressure and rising populist opposition—prompting concern essential climate action could be sidelined
