Acquisition of EPCA

For Immediate Release

Pampa Energía announces the acquisition of EPCA

Buenos Aires, January 31, 2011. Pampa Energía S.A. (NYSE: PAM; Buenos Aires Stock Exchange: PAMP) (“Pampa” or the “Company”), announces that it has accepted an offer to aquire, subject to the fulfillment of certain conditions precedent and to obtaining the relevant regulatory approvals, all of the shares issued by Enron Pipeline Company Argentina S.A. (“EPCA”), a company which owns 10% of the share capital of Compañía de Inversiones de Energía S.A. (“CIESA”), which in turn owns 55.3% of the share capital of Transportadora de Gas del Sur S.A. (“TGS”). The total agreed price is US$ 29,000,000.

Pampa Energía is the largest integrated electricity company in Argentina that, through its subsidiaries, participates in the generation, transmission and distribution of electricity.

For further information, contact:

Ricardo Torres – Chief Executive Officer
Mariano Batistella – Strategic Planning and Investor Relations
3302 Ortiz de Ocampo, Building #4
(C1425DSR) Ciudad Autónoma de Buenos Aires, Argentina
Phone: 5411 4809 9500
http://www.pampaenergia.com/ir
investor@pampaenergia.com