Norway’s Aker Horizons acquires 75% stake in Mainstream Renewable Power

Facebook
Twitter
LinkedIn
Reddit
Email
Mainstream’s 145MW Rio Escondido solar park under construction in Chile. Image: Mainstream Renewable Power.

Norwegian investment company Aker Horizons has acquired a 75% interest in Mainstream Renewable Power, valuing the solar and wind project developer at €1 billion.

Mainstream said the agreement paves the way for a “rapid acceleration” of its global expansion plans to bring 5.5GW of solar and wind assets to financial close by 2023. The company has a development pipeline of around 10GW, including large-scale solar projects in Chile – where it recently closed a US$280 million finance facility – and South Africa.

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Under terms of the agreement, the company will continue to operate as Mainstream, led by CEO Mary Quaney. Eddie O'Connor, an Irish businessman who founded Mainstream in 2008, will remain chairman and retain a minority interest in the business.

It was also announced that an initial public offering of Mainstream is planned to take place within the next two to three years.

“This partnership is the crucial next step in the vision we set out for Mainstream in 2008 to lead the global transition to renewable energy and rid the world of CO2 emissions,” O'Connor said. “It means we can widen our scope for entry into new markets and further deepen and expand our leadership position in existing ones.”

Aker Horizons, which is owned by industrial investment company Aker ASA, said the acquisition will enable the firm to accelerate the development of a global position within green energy.

“Mainstream's role as a pioneer in renewables and its strong entrepreneurial culture is a good fit as we carve out our path forward in the energy transition. Through the acquisition of Mainstream, Aker Horizons will gain a platform to drive forward its plans in renewable energy and position itself in a growing market for hybrid projects,” said Kristian Røkke, CEO of Aker Horizons.

As part of the transaction, Aker Horizons will also acquire a 50% holding in SuperNode, a company founded by Eddie O’Connor in 2018 that designs and develops superconductor cables to address the future need for higher capacity cables with lower power loss.

The Mainstream acquisition is expected to close in the second quarter of 2021.

25 November 2025
Warsaw, Poland
Large Scale Solar Central and Eastern Europe continues to be the place to leverage a network that has been made over more than 10 years, to build critical partnerships to develop solar projects throughout the region.

Read Next

June 30, 2025
Voting on the US tax reconciliation bill is expected to begin in the Senate today, following a draft published on Friday that hit clean energy tax credits hard.
June 27, 2025
Renewables investment platform Nexwell Power has signed a round of power purchase agreements (PPAs) with “one of the largest” US tech companies for solar PV capacity to be built in Spain.
Premium
June 27, 2025
PV Talk: '2024 was a transformational year in terms of energy policy,' says Monika Paplaczyk ahead of this year's Clean Power 2030 Summits.
June 26, 2025
A group of minority shareholders in Norwegian silicon firm REC Silicon has triggered an investigation into the circumstances surrounding the closure of the company’s US polysilicon production site.
June 25, 2025
US EPC contractor SOLV Energy has acquired high-voltage (HV) transmission contractor Arizona-based Spartan Infrastructure.
June 25, 2025
Australia’s National Electricity Market (NEM) achieved a new record high for solar PV and wind generation at 12,463MW.

Subscribe to Newsletter

Upcoming Events

Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 1, 2025
London, UK
Media Partners, Solar Media Events
July 2, 2025
Bangkok, Thailand
Media Partners, Solar Media Events
September 2, 2025
Mexico City, Mexico
Solar Media Events
September 16, 2025
Athens, Greece