5 Biggest Renewable Energy Companies in Europe

4. Iberdrola, S.A. (OTC:IBDRY)

Market Cap as of November 4, 2023: $70.46 Billion

Iberdrola, S.A. (OTC:IBDRY) is one of the leading renewable energy companies based in Spain. The company has been operating for more than 170 years and is one of the largest wind power producers. Iberdrola, S.A. (OTC:IBDRY) has a market cap of $70.46 billion as of November 4, 2023.