Extension of Exclusivity Period

Buenos Aires, April 8, 2016. Pampa Energía S.A. (‘Pampa’ or the ‘Company’; NYSE: PAM; Buenos Aires Stock Exchange: PAMP) informs that in connection with the relevant event filed on March 2, 2016, and in order to continue the advanced negotiations for the acquisition of Petrobras Argentina S.A., the exclusivity period was extended for an additional 30-day period.

We reiterate that, the consummation of this transaction is subject to the successful negotiation of the terms and conditions and relevant definitive documents relating to the transaction, and the approval of such terms, conditions and documents by the pertinent corporate bodies of Petróleos Brasileiros S.A. and the Company.

For further information, contact:

Ricardo Torres – Co-Chief Executive Officer
Gustavo Mariani – Co-Chief Executive Officer
Mariano Batistella – Special Projects Manager and Investor Relations Officer
Lida Wang – Chief of Investor Relations

3302 Ortiz de Ocampo, Building #4

(C1425DSR) Ciudad Autónoma de Buenos Aires, Argentina
Phone: +54 (11) 4809 9500
http://www.pampaenergia.com/ir
investor@pampaenergia.com