| | | | | | | | |
| Subsidiary Name | | Location of Incorporation or Organization |
| Angelina Gathering Company, LLC | | Texas |
| A.W. Realty Company, LLC | | Texas |
| SW Gathering, LLC | | Delaware |
| SWN Drilling Company, LLC | | Texas |
| SWN E & P Services, LLC | | Texas |
| SWN Energy Services Company, LLC | | Texas |
| SWN International, LLC | | Delaware |
| SWN Midstream Services Company, LLC | | Texas |
| SWN Producer Services, LLC | | Texas |
| SWN Production Company, LLC | | Texas |
| SWN Production (Louisiana), LLC | | Texas |
| SWN Production (Ohio), LLC | | Texas |
| SWN Resources Canada, Inc. | | British Columbia, Canada |
| SWN Water Resources Company, LLC | | Texas |
| SWN Well Services, LLC | | Texas |