| February 2007: Third Capital Increase |
| Pampa increases its capital stock in 600 million shares at AR$2.23 per share. |
| May 2007: Pampa Acquires Central Térmica Loma de la Lata |
| August 2007: Pampa Acquires Central Térmica Piedra Buena |
| September 2007: Fourth Capital Increase and Acquisition of Edenor‘s Controlling Stake |
| Pampa acquires controlling stake of Edenor through a share swap. Pampa increases its capital stock in 480 million shares at AR$2.61 per share to carry out the exchange. |