In September 2007 ACCIONA was selected for the Dow Jones Sustainability World Index (DJSI) and the Dow Jones STOXX Sustainability Index (DJSI STOXX) - both international indices of reference for sustainability and socially responsible investment. ACCIONA achieved the maximum weighting in its area reaching the position of sector leader (Heavy Construction).

In September 2008 ACCIONA reasserted its leadership gaining the highest weighting in its sector once again, and improving its weighting over the previous year when the company had already reached the position of sector leader.

The DJSI World index lists those companies deemed most advanced in terms of  economic, social, and environmental sustainability. Of the 2,500 international companies that make up the Dow Jones World Index, only 320 companies are selected for the DJSI World, of which 20 are Spanish in the annual revision for 2008.

The DJSI STOXX Index lists those European companies committed to sustainability. Of the 162 European companies listed in the DJ STOXX, 15 are Spanish.

The information required is exhaustive, the analysis carried out rigorous, and the weighting system, which evaluates all candidates against the company that produced the best results ("best in class"),  means that this family of indices is the world reference for corporate responsibility and sustainable development policy. Currently, investment bodies manage around 6 billion dollars in more than 16 countries referenced to the Dow Jones sustainability indices.