On August 5, 2011, Massachusetts Financial Services Company ("MFS") notified EDP that, in accordance with article 20 of the Portuguese Securities Code, it came to hold 73,667,635 ordinary shares of EDP, which corresponds to 2.01% of EDP's share capital and 2.01% of the respective voting rights. The significant shareholding resulted from the acquisition through NYSE Euronext Lisbon of 710,779 shares by on August 2, 2011.

MFS also informed that the chain of entities relevant for the calculation of the significant shareholding in accordance with number 1 of article 20 of the Portuguese Securities Code are the following:

- Massachusetts Financial Services Company, which holds directly 62,605,419 ordinary shares of EDP, corresponding to 1.71% of EDP's share capital and 1.71% of the respective voting rights;

- MFS Institutional Advisors, Inc., which holds 1,766,099 ordinary shares of EDP, corresponding to 0.05% of EDP's share capital and 0.05% of the respective voting rights;

- MFS International Ltd., which holds 5,014,450 ordinary shares of EDP, corresponding to 0.14% of EDP's share capital and 0.14% of the respective voting rights;

- MFS International (U.K.) Limited, which holds 3,474,716 ordinary shares of EDP, corresponding to 0.10% of EDP's share capital and 0.10% of the respective voting rights;

- MFS Investment Management K.K., which holds 806,951 ordinary shares of EDP, corresponding to 0.02% of EDP's share capital and 0.02% of the respective voting rights;

EDP – Energias de Portugal, S.A