| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2012-10-11 | CITY OF LONDON INVESTMENT GROUP PLC | Pampa Energy Inc. | 5,350,581 | 10.2% | EDGAR |
| SC 13G/A | 2012-02-14 | Eton Park Capital Management, L.P. | Pampa Energy Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2012-01-26 | Autonomy Capital (Jersey) L.P. | Pampa Energy Inc. | 3,791,326 | 7.2% | EDGAR |
| SC 13G/A | 2012-01-26 | Autonomy Capital (Jersey) L.P. | Pampa Energy Inc. | 3,691,326 | 7.0% | EDGAR |
| SC 13G/A | 2012-01-26 | Autonomy Capital (Jersey) L.P. | Pampa Energy Inc. | 3,399,726 | 6.5% | EDGAR |
| SC 13D/A | 2012-01-04 | Pampa Holdings LLC | Pampa Energy Inc. | 251,537,514 | 19.1% | EDGAR |
| SC 13G/A | 2012-01-03 | Barnston Inc. | Pampa Energy Inc. | 838,591 | 1.6% | EDGAR |
| SC 13G | 2011-06-01 | Barnston Inc. | Pampa Energy Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2011-02-14 | Eton Park Capital Management, L.P. | Pampa Energy Inc. | 12,531,125 | 1.0% | EDGAR |
| SC 13G/A | 2011-02-11 | Autonomy Capital (Jersey) L.P. | Pampa Energy Inc. | 3,691,326 | 7.0% | EDGAR |
| SC 13D | 2010-12-21 | Pampa Holdings LLC | Pampa Energy Inc. | 171,788,457 | 13.1% | EDGAR |
| SC 13D/A | 2010-12-10 | Pampa Energy Inc. | EDENOR | 33,248,435 | 7.5% | EDGAR |
| SC 13D | 2010-11-22 | Pampa Energy Inc. | EDENOR | 49,719,123 | 11.2% | EDGAR |
| SC 13D/A | 2010-11-05 | Pampa Energy Inc. | EDENOR | 39,041,835 | 8.8% | EDGAR |
| SC 13G | 2010-03-12 | Eton Park Capital Management, L.P. | Pampa Energy Inc. | 501,245 | 0.8% | EDGAR |
| SC 13G | 2010-03-02 | Pampa Holdings LLC | Pampa Energy Inc. | 206,808,121 | 13.6% | EDGAR |
| SC 13G | 2010-02-16 | Autonomy Capital (Jersey) L.P. | Pampa Energy Inc. | 4,021,926 | 6.6% | EDGAR |