On May 3, 2013, ISA published in La República daily the Prepayment Notice of the Third Tranche of the Domestic Debt Securities Issue and Underwriting

Today in Lima Perú, Interconexión Eléctrica S.A. E.S.P. – ISA S.A. acquired 11,304,604 shares corresponding to 17.07% of Interconexión Eléctrica Perú S.A

This coming June 4 2013, ISA shareholders will receive the payment of dividends as approved by the Shareholders’ Meeting on March 22, 2013.

Upgrade of international rating from “BBB

ISA informs the market that it has exercised today the prepayment option for the Bonds Third Tranche of the Public Debt Bond Issue and Placement

174 km electric line

The name of the new company will be INTERCOLOMBIA.

Outlook remains stable.

ISA informs that Camilo Barco Muñoz, Corporate Finance Manager of the Company since 2008, submitted his resignation from July 15th, 2013.

César Augusto Ramírez Rojas, current president of Compañía de Transmisión de Energía Eléctrica Paulista –CTEEP–, has been invited to head ISA’s new Technical Center, one

The Colombian Financial Superintendency has issued Resolution No. 1534 of August 15, 2013 cancelling filing with RNVE (National Registry of Securities and Issuers) for the

Incorporation of INTERCOLOMBIA took place upon authorization granted by ISA’s Board of Directors in meeting of June 28, 2013; operations are expected to begin at

Interconexión Eléctrica S.A. E.S.P. announces date for Shareholders’ Meeting of 2014

At the Administration Council meeting held in October 21, in the city of São Paulo, ISA’s CEO, Luis Fernando Alarcón M, informed that César Augusto

The Agência Nacional de Energia Elétrica de Brasil (ANEEL), as provided in communication No. 3261 of September 27, 2013, authorized entering into a contract between