Main companies on the IBEX 35 by their relative weight in Spain 2021
As of 2021, in Spain, just three companies made up for approximately 35 percent of the IBEX 35's stock value. Iberdrola ranked as the IBEX 35 company with the highest market share. The stocks of the Spanish energy company based in Bilbao accounted for about 13 percent of the stock market index. Santander and Inditex ranked second and third, respectively.
