Top 10: Renewable Energy Companies

Renewables are now the fastest-growing source of global power, supplying nearly 30% of electricity generated worldwide in 2025, according to the International Energy Agency (IEA). 

As the clean energy transition accelerates, market valuations reflect a decisive shift toward sustainability. 

This list ranks the Top 10 Renewable Energy Companies by market capitalisation, spotlighting the industry’s largest and most influential players. 

These ten listed companies are driving innovation in wind, solar, hydro, green hydrogen and more, while setting the pace for a low‑carbon global economy.

10. Adani Green Energy

HQ: Ahmedabad, Gujarat, India

CEO: Ashish Khanna

Market cap: US$18.81bn

Renewable focus: Solar and wind

Adani Green Energy has rapidly become India’s flagship renewables pure‑play, amassing one of the largest operating green power portfolios in the world. 

Its capacity has surged past 12 GW and continues to climb, driven by a mix of solar, wind and innovative hybrid projects spread across more than a dozen states. 

The company is targeting 50 GW of renewable capacity by 2030, closely aligned with India’s national decarbonisation goals and its push to cut fossil fuel imports. By focusing on grid‑connected, utility‑scale assets and leveraging the broader Adani Group’s infrastructure expertise, Adani Green is central to efforts to green one of the world’s fastest‑growing power systems while keeping electricity affordable for millions of consumers.

9. Brookfield Renewable Partners

HQ: Toronto, Canada

CEO: Connor Teskey

​Market cap: US$18.95bn

​Renewable focus: Hydroelectric, wind, solar, distributed energy and sustainable solutions

Brookfield Renewable Partners runs one of the world’s largest pure‑play listed renewable power platforms, combining scale with sophisticated capital allocation. Its portfolio spans more than 35–45 GW of operating capacity across hydro, wind, utility‑scale and distributed solar, plus storage assets in the Americas, Europe and Asia‑Pacific. 

The business also has an enormous development pipeline approaching 200 GW, enabling it to feed growing corporate demand for clean power, including from energy‑hungry data centres.

8. LONGi Green Energy Technology

HQ: Xi’an, Shaanxi Province, China

CEO: Li Zhenguo

Market cap: US$20.05

Renewable focus: Solar

LONGi has grown from a specialist in monocrystalline wafers into one of the most influential solar technology companies in the world. 

Its vertically integrated model spans wafers, high‑efficiency cells, modules and complete PV system solutions, supplying projects in more than 150 countries and regions. 

The company is also expanding into green hydrogen equipment, positioning itself at the intersection of renewable power generation and the next wave of clean fuel production. 

As the first Chinese PV player to sign up to initiatives such as RE100 and SBTi, LONGi couples scale with a visible climate agenda, using extensive R&D and global manufacturing to push down the cost of solar‑driven decarbonisation worldwide.

7. Bloom Energy

HQ: San Jose, California, US

CEO: KR Sridhar

Market cap: US$24.82bn

Renewable focus: Fuel cells

Bloom Energy is reimagining how clean power is generated and consumed, shifting away from centralised plants to resilient, on‑site systems. 

Its solid‑oxide fuel cell “Bloom Energy Servers” provide always‑on electricity that can already run on biogas and, increasingly, hydrogen, enabling customers to slash emissions while boosting reliability. 

With around 1.4 GW of capacity installed at more than 1,000 sites worldwide, Bloom has become a critical partner for data centres, hospitals and manufacturers seeking to decarbonise without sacrificing uptime. 

6. Vestas Wind Systems

HQ: Aarhus, Denmark

CEO: Henrik Andersen

Market cap: US$28.42bn

Renewable focus: Onshore and offshore wind turbines and services

Vestas is the world’s most prolific wind turbine manufacturer by installed base, with more than 189 GW erected across around 80–90 countries. 

Its machines define skylines from Texas and the North Sea to emerging markets in Latin America and Asia, supported by a vast service business that keeps over 130 GW under active management. 

The company’s technology portfolio spans cutting‑edge platforms such as the V236‑15.0 MW offshore turbine, backed by a multigigawatt order book that underpins long‑term growth. 

Vestas marries engineering scale with sophisticated digital tools, using data from thousands of turbines to optimise performance, extend asset lifetimes and lower the cost of wind‑generated electricity around the globe.

5. First Solar

HQ: Tempe, Arizona, US

CEO: Mark Widmar

Market cap: US$28.74bn

Renewable focus: Solar

First Solar has carved out a distinctive position in the PV market by betting on cadmium telluride thin‑film technology rather than conventional crystalline silicon. Its Series 6 and Series 7 modules offer strong performance in hot, humid and low‑light conditions, delivering higher real‑world yields for large solar farms operating on harsh grids from the US Southwest to India and the Middle East. 

The company also stands out for its emphasis on traceable, largely regional supply chains and detailed life‑cycle assessments, resulting in significantly lower embedded carbon and water footprints than many rivals.

4. ACWA Power Company

HQ: Riyadh, Saudi Arabia

CEO: Marco Arcelli

Market cap: US$34.7bn

Renewable focus: Utility‑scale solar, wind and green hydrogen mega‑projects

ACWA Power has positioned itself as the project developer of choice for governments seeking to leapfrog into large‑scale renewables and green hydrogen. 

From landmark concentrated solar power schemes to gigawatt‑scale PV and wind plants, its portfolio now spans more than 100 projects and tens of gigawatts of low‑carbon capacity across the Middle East, Africa, Central Asia and beyond. 

Crucially, ACWA is at the heart of Saudi Arabia’s green industrial strategy, co‑developing some of the world’s most ambitious green hydrogen and ammonia facilities designed to decarbonise heavy industry and export clean fuels.

3. Sungrow Power Supply

HQ: Hefei, Anhui Province, China

CEO: Cao Renxian

Market cap: US$50.97bn

Renewable focus: PV inverters, energy storage and green hydrogen systems

Sungrow has become a key force behind the solar boom, supplying the power electronics that keep vast PV fleets online and optimised. The company is the world’s No.1 PV inverter provider by shipments, with hundreds of gigawatts of converters deployed across more than 170 countries, from utility‑scale solar parks to commercial rooftops and homes. 

Its portfolio now stretches well beyond inverters to encompass advanced energy storage systems, floating solar, EV charging and renewable‑hydrogen solutions, reflecting a strategy built around “clean power for all”. 

​2. NextEra Energy

HQ: Juno Beach, Florida, US

CEO: John Ketchum

​Market cap: US$165.6bn

​Renewable focus: Utility‑scale wind, solar and storage

NextEra Energy has built arguably the most powerful renewables growth engine in North America, coupling scale with relentless capital deployment. 

Through NextEra Energy Resources, the group is the world’s largest generator of renewable energy from the wind and sun and a recognised leader in grid‑scale battery storage. 

It continues to roll out gigawatts of new capacity each year, backed by a vast development pipeline that spans multiple US regions and Canada. 

Alongside this, NextEra’s nuclear fleet and transmission investments give it unusual system‑level influence over how clean power flows to customers. This integrated model – from generation through to networks – makes the company a bellwether for how big utilities can decarbonise at speed while keeping prices competitive.

1. GE Vernova

HQ: Cambridge, Massachusetts, US

CEO: Scott Strazik

Market cap: US$184.7bn

Renewable focus: Wind, grid and emerging low‑carbon technologies

Spun out of General Electric in 2024, GE Vernova integrates onshore and offshore wind, grid modernisation and flexible generation technologies into one of the sector’s most comprehensive transition platforms. 

With an installed base running to tens of thousands of turbines and software such as GridOS already embedded in many leading utilities, GE Vernova is shaping how renewable power is produced, dispatched and balanced on increasingly complex networks. 

Its multi‑billion‑dollar annual R&D push into areas like advanced wind, carbon capture and next‑generation grid controls underlines the company’s ambition to remain at the sharp end of the global net zero race.