| Business | Phone |
| Absolute Energy Ltd 304 8 Ave Sw #1000, Calgary T2P 1C2 | (403) 266-5027 |
| Sheer Energy Inc 138 18 Ave Se #106, Calgary T2G 5P9 | (403) 802-6983 |
| Husky Energy Inc 707 8 Ave Sw #1900, Calgary T2P 1H5 | (403) 298-6111 |
| Mike Red Energy 441 5 Ave Sw #710, Calgary T2P 2V1 | (403) 263-0103 |
| Onyx Energy Inc 540 5 Ave Sw #700, Calgary T2P 0M2 | (403) 206-2201 |
| Penn West Petroleum Ltd 425 1 St Sw #2000, Calgary T2P 3L8 | (403) 777-2500 |
| Snow Leopard Resources Inc 330 5 Ave Sw #600, Calgary T2P 0L4 | (403) 265-4377 |
| Talisman Energy Inc 888 3 St Sw #3400, Calgary T2P 5C5 | (403) 237-1234 |
| Trafina Energy Ltd 505 3 St Sw #888, Calgary T2P 3E6 | (403) 263-0800 |
| Western Oil Sands Inc 440 2 Ave Sw #2400, Calgary T2P 5E9 | (403) 296-1624 |
| Winter Petroleum Ltd 700 6 Ave Sw #1700, Calgary T2P 0T8 | (403) 233-8212 |
| Canadian Natural Resources Ltd 855 2 St Sw #2500, Calgary T2P 4J8 | (403) 264-8780 |
| Cequel Energy Inc 500 4 Ave Sw #3200, Calgary T2P 2V6 | (403) 262-9609 |
| Durness Resources Inc 317 7 Ave Sw #1850, Calgary T2P 2Y9 | (403) 265-2525 |
| Enhanced Resources Inc 507 Patterson View Sw, Calgary T3H 3J9 | (403) 265-7170 |