Atlantica Sustainable Infrastructure
A London-based sustainable infrastructure company developing and operating contracted renewable-energy and environmental infrastructure assets.
Last updated August 31, 2026
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Overview
Atlantica Sustainable Infrastructure is a sustainable infrastructure company headquartered in London, United Kingdom. The business was established in 2013 to own and manage long-term contracted infrastructure assets, initially concentrating on solar generation, electricity transmission and water-related infrastructure. It later broadened its portfolio across renewable power and associated infrastructure, including solar, wind and geothermal generation, as well as electric transmission and efficient natural-gas assets. Atlantica became a publicly traded company on the Nasdaq in 2014. Its business model emphasized infrastructure assets supported by long-term contracts, power-purchase agreements, regulated arrangements or other contractual revenue frameworks. This approach was intended to provide relatively visible cash flows over the operating lives of the assets while allowing the company to invest across multiple energy markets. The company operated internationally, with assets and interests in North America, Europe and South America. Its North American portfolio included the Solana and Mojave solar power plants and a minority interest in the Vento II wind portfolio. In Europe, the company maintained a significant renewable-energy presence, particularly in Spain, and in 2024 added two wind assets in Scotland. In South America, its portfolio included wind farms in Uruguay. The company also acquired the Coso geothermal plant in California in 2021, adding a baseload renewable-energy asset to a portfolio that had historically been more heavily associated with solar power and transmission infrastructure. Atlantica rebranded as Atlantica Sustainable Infrastructure in 2020. The change reflected the company's increasing emphasis on renewable energy, sustainability and the broader energy-transition infrastructure market. By the end of 2023, its renewable-energy portfolio had 2,171 megawatts of operating capacity. In 2024, total renewable installed capacity was described as approximately 2.2 gigawatts, covering solar, wind and geothermal assets. The company was acquired in 2024 by Energy Capital Partners, a United States-based energy-transition infrastructure investor, together with co-investors. The parties announced a transaction valuing the equity purchase at approximately $2.555 billion, based on a stated price of $22 per share. Atlantica shareholders approved the transaction in August 2024, with 97 percent voting in favor. Completion took place in the fourth quarter of 2024 through a scheme of arrangement involving California Buyer Limited, a subsidiary of Energy Capital Partners and its co-investors. Following completion, Atlantica's ordinary shares were delisted from the Nasdaq Global Select Market. Atlantica is therefore best understood as an infrastructure operating and investment platform rather than a consumer-food brand. Its brand positioning is built around renewable generation, contracted infrastructure cash flows, geographic diversification and participation in the transition toward lower-carbon energy systems.
History
Atlantica was founded in 2013 as an infrastructure company intended to manage long-term contracted energy and environmental assets. Its initial portfolio and investment focus included solar power plants, electric transmission lines and water infrastructure. The use of contracted or otherwise predictable revenue arrangements was central to its business model, allowing the company to combine infrastructure ownership with long-duration operating cash flows. The company entered the public markets in 2014 through a Nasdaq listing. During its early development, solar generation was a particularly important part of the portfolio, while transmission and water assets provided additional diversification. Santiago Seage served as chief executive from the company's founding, apart from a brief departure in 2015. In 2020, Atlantica adopted the name Atlantica Sustainable Infrastructure. The rebranding signaled a broader strategic identity centered on renewable energy, sustainability and infrastructure supporting the energy transition. The company subsequently expanded beyond its earlier solar-heavy profile. In 2021 it acquired the Coso Geothermal Plant in California, a renewable facility capable of providing baseload generation. It also acquired a 49 percent interest in the Vento II wind portfolio for $196.5 million. Vento II consisted of four wind assets in Illinois, Texas, Oregon and Minnesota and had total capacity of 596 MW. Atlantica continued to operate across several regions. Its North American assets included the Solana and Mojave solar plants and its Vento II interest. In Europe, Spain remained an important market for renewable infrastructure. In South America, the company owned or held interests in wind farms in Uruguay. By the end of 2023, the renewable portfolio had 2,171 MW of operating capacity. In 2024, the company added two Scottish wind assets with combined capacity of 32 MW, and its renewable installed capacity was described as approximately 2.2 GW. The next major turning point was a change in ownership. On May 27, 2024, Atlantica entered into an agreement under which all of its shares would be acquired by Energy Capital Partners and co-investors. The proposed transaction was valued at approximately $2.555 billion using a stated purchase price of $22 per share. Shareholders approved the transaction in August 2024, with 97 percent voting in favor. The acquisition was completed in the fourth quarter of 2024 through a scheme of arrangement under English law involving California Buyer Limited, a vehicle associated with Energy Capital Partners and its co-investors. After completion, Atlantica's ordinary shares were delisted from the Nasdaq Global Select Market. The transaction ended the company's period as a publicly traded infrastructure company while preserving its identity as an owner and operator of sustainable energy and infrastructure assets.
- 2024
Scottish wind expansion
[1]Two Scottish wind assets added a combined 32 MW to the portfolio.
- 2024
Acquisition by Energy Capital Partners
[1]Energy Capital Partners and co-investors completed the acquisition of Atlantica, followed by its Nasdaq delisting.
- 2023
Renewable portfolio reaches 2,171 MW in operation
[1]By year-end, Atlantica's operating renewable-energy portfolio totaled 2,171 MW.
- 2021
Coso geothermal acquisition
[1]Atlantica acquired the Coso Geothermal Plant in California.
- 2021
Vento II investment
[1]Atlantica acquired a 49 percent interest in the 596 MW Vento II wind portfolio for $196.5 million.
- 2020
Sustainable Infrastructure rebrand
[1]Atlantica adopted the Atlantica Sustainable Infrastructure name to emphasize renewable energy and sustainability.
- 2014
Nasdaq listing
[1]The company became publicly traded on the Nasdaq, initially focusing on solar, transmission and water infrastructure.
- 2013
Company founded
[1]Atlantica was established to manage long-term contracted energy and environmental infrastructure assets.
Products and positioning
A diversified owner and operator of long-term contracted sustainable infrastructure, with an emphasis on renewable power, energy-transition assets and geographically diversified infrastructure operations.
Renewable electricity generation
Solar power infrastructure
Atlantica's solar portfolio has included the Solana and Mojave solar power plants in North America, together with additional solar assets in its international infrastructure portfolio. These facilities generate electricity as part of the company's long-term contracted renewable-energy business.
Renewable electricity generation
Wind power infrastructure
The company owns or holds interests in wind assets across North America, South America and Europe. Its portfolio has included the Vento II portfolio in the United States, wind farms in Uruguay and two Scottish wind assets acquired in 2024.
Geothermal electricity generation · 2021
Coso Geothermal Plant
Located in California, the Coso Geothermal Plant provides renewable baseload electricity. Atlantica acquired the facility in 2021, broadening its generation mix beyond solar and wind.
Energy transmission
Electric transmission infrastructure
Electric transmission lines formed part of Atlantica's original infrastructure focus. These assets complement the company's generation portfolio and support the delivery of electricity within the markets where its projects operate.
Environmental infrastructure
Water and environmental infrastructure
Water assets and other environmental infrastructure were included in Atlantica's original portfolio mandate. The company positioned these assets alongside energy infrastructure as long-term contracted projects with essential-service characteristics.
Brand decisions
2024
Sale to Energy Capital Partners and co-investorsM&ABackground
Atlantica entered an agreement to be acquired in a transaction taking the company private.
Action taken
Energy Capital Partners and co-investors agreed to acquire all shares at a stated price of $22 per share. Shareholders approved the transaction with 97 percent voting in favor, and completion followed in the fourth quarter.
Aftermath
Atlantica was acquired through a scheme of arrangement and its ordinary shares were delisted from Nasdaq.
Equity purchase value. $2.555 billion (2024 announced transaction)
2021
Acquisition of Coso geothermal plantM&ABackground
Atlantica sought to diversify its renewable generation portfolio with a baseload resource.
Action taken
The company acquired the Coso Geothermal Plant in California.
Aftermath
Geothermal generation became part of Atlantica's renewable-energy portfolio.
2021
Investment in Vento IIM&ABackground
Atlantica was broadening its exposure to wind generation in the United States.
Action taken
It bought a 49 percent stake in a 596 MW portfolio of four wind assets.
Aftermath
The investment increased the company's wind presence across Illinois, Texas, Oregon and Minnesota.
Purchase price. $196.5 million (2021 transaction)
2020
Rebrand around sustainable infrastructureStrategyBackground
Atlantica was expanding its renewable-energy and sustainability activities beyond its earlier concentration on solar, transmission and water assets.
Action taken
The company changed its name to Atlantica Sustainable Infrastructure.
Aftermath
The new name more clearly associated the company with renewable power and energy-transition infrastructure.
Recent events
Atlantica agrees to acquire Coso geothermal plants[2]
Reported:
Atlantica Sustainable Infrastructure announced that it had reached an agreement to acquire Coso Geothermal Power Holdings, which owns a portfolio of three geothermal plants in California. The transaction was expected to close in the first half of 2021, subject to customary conditions and regulatory approvals.
Sources2 sources
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