ENG_Comunicado ao Mercado_Maio 2016

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 revised CEMAR's National Long Term Rating to AA+(bra) from AA(bra), with stable outlook. Simultaneously, the agency also revised to AA+(bra) from AA(bra) the Senior Unsecured Debentures issued by the Company.

In its notice, Fitch that has recalibrated its Brazilian National Ratings scale following successive downgrades of the sovereign over the last six months. The recalibration has resulted in several national scale ratings revisions for issuers in various sectors.

To view the full report (in Portuguese), access Fitch's website, at: http://www.fitchratings.com.br/.

Rio de Janeiro, May 19, 2016

Eduardo Haiama Investor Relations Officer

Cia. Energética do Maranhão - CEMAR

Chief Financial and Investor Relations Officer Equatorial Energia S.A.

Equatorial Energia SA published this content on 19 May 2016 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 19 May 2016 23:17:13 UTC.

Original documenthttp://www.equatorialenergia.com.br/download_arquivos.asp?id_arquivo=E1373116-206A-4B27-AB6A-7DF73E88E76C

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