Largest Solar Energy Companies by Market Cap

First Solar, headquartered in Tempe, Arizona, is the leading manufacturer of thin-film solar panels worldwide, while China-based LONGi Green Energy — founded in 2000 — pioneered large-scale monocrystalline wafer production before expanding into cells and modules. Together with JinkoSolar (NYSE: JKS) and Canadian Solar (NASDAQ: CSIQ), these companies sit at the center of the global solar energy industry.

The solar sector spans several distinct sub-sectors:

• PV Module Manufacturing: LONGi Green Energy, JinkoSolar, First Solar, Canadian Solar — covering polysilicon, wafers, cells, and finished panels.
• Inverters & Power Electronics: Enphase Energy (NASDAQ: ENPH), which makes microinverters compatible with nearly every solar panel, and SolarEdge Technologies (NASDAQ: SEDG), an Israeli company established in 2006 that produces inverters, monitoring software, and battery storage products.
• Utility-Scale Solar Development: NextEra Energy Resources, North America’s top clean energy company, which develops and operates large-scale wind and solar projects.
• Residential Solar & Storage: Sunrun (NASDAQ: RUN), America’s largest provider of home battery storage and rooftop solar systems.

Geographically, China dominates module manufacturing through companies like JinkoSolar, Trina Solar, and LONGi. First Solar stands out as the only top-tier manufacturer based outside China, using proprietary cadmium telluride thin-film technology rather than silicon. In India, Adani Green Energy and Tata Power Solar are among the leading players, while Spanish companies like Iberdrola represent Western Europe’s presence in solar development.

The Invesco Solar ETF (TAN) is a widely followed fund that tracks publicly traded solar energy companies. For a broader view, see our list of green energy and renewable energy companies or explore the largest energy companies by market cap.

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The table below ranks the largest solar energy companies by market capitalization, covering module manufacturers, inverter makers, solar developers, and integrated renewable energy firms. All data — including share price and market cap — updates automatically to reflect current market conditions.