Colombia, Medellín, 19/12/2013

RELEVANT INFORMATION Assembly of Bondholders Second Call Result

ISA informs that the Assembly of Bondholders was held today, with a quorum of fifty- nine point fifty percent (59.50%), with the assistance of Fiduciaria Corficolombiana
S.A as legal representative of the bondholders. At such meeting, ISA was authorized
to amend its corporate purpose. 59.37% voted in favor and 0.1305% voted in blank.

INTERCONEXIÓN ELÉCTRICA S.A. E.S.P NIT: 860.016.610-3 Dirección: Calle 12 Sur 18 - 168. Medellín, Colombia

Tel: + 57 4 3252270 Fax: + 57 4 3170848 A.A . 8915 www.isa.com.co

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