Comunicado ao Mercado_15 05 15_ENG

Equatorial Energia S.A.

Public-held Company

CNPJ/MF nº 03.220.438/0001-73

Cia. Energética do Maranhão - CEMAR

Public-held Company

CNPJ/MF nº 06.272.793/0001-84

NOTICE TO THE MARKET

Equatorial Energia S.A. and Cia. Energética do Maranhão - CEMAR announce that, today, Fitch Ratings increased CEMAR's National Long Term Rating and its issued debentures to AA (bra), from AA- (bra), with stable outlook.
To view the full report, please access Fitch's website, at http://www.fitchratings.com.br/, in Portuguese.

Rio de Janeiro, May 15, 2015

Eduardo Haiama

Investor Relations Officer

Cia. Energética do Maranhão - CEMAR

Chief Financial and Investor Relations Officer

Equatorial Energia S.A.

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