| 15 févr. 2008 | GRANT_AWARD | PRB Gas Transportation, Inc. | 150 000 | 0.45 USD | |
| 30 juil. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 500 | 2.33 USD | |
| 30 juil. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 7 200 | 2.35 USD | |
| 30 juil. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 400 | 2.28 USD | |
| 30 juil. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 900 | 2.29 USD | |
| 08 juin 2007 | PURCHASE | PRB Gas Transportation, Inc. | 10 000 | 2.48 USD | |
| 17 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 800 | 2.88 USD | |
| 17 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 2 300 | 2.87 USD | |
| 17 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 6 900 | 2.88 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 000 | 2.84 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 400 | 2.84 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 800 | 2.84 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 200 | 2.85 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 700 | 2.89 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 000 | 2.99 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 500 | 2.90 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 200 | 2.89 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 000 | 2.94 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 300 | 2.95 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 900 | 2.97 USD | |
| 04 avr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 000 | 2.88 USD | |
| 16 févr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 11 000 | 3.27 USD | |
| 20 févr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 4 000 | 3.20 USD | |
| 20 févr. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 1 000 | 3.19 USD | |
| 19 janv. 2007 | PURCHASE | PRB Gas Transportation, Inc. | 300 | 3.00 USD | |