EXHIBIT 21
SUBSIDIARIES OF THE REGISTRANT
The following is a list of all subsidiary corporations of the registrant. All subsidiaries are wholly-owned by the Company, except that Buckley Mining Corporation and Plastics Universal Corporation are wholly-owned subsidiaries of Ada Mining Corporation. The Company's consolidated financial statements include the accounts of all subsidiaries.
| Subsidiary | Place of Incorporation |
| | |
| Adams Resources Exploration Corporation | Delaware |
| Kirbyville Marketing Co., Inc. | Texas |
| Service Transport Company | Texas |
| Bayou City Pipelines, Inc. | Texas |
| Ada Crude Oil Company | Texas |
| Ada Mining Corporation | Texas |
| Classic Coal Corporation | Delaware |
| Plastics Universal Corporation | Kentucky |
| CJC Leasing, Inc. | Kentucky |
| Buckley Mining Corporation | Kentucky |
| Gulfmark Energy, Inc. | Texas |
| Ada Resources, Inc. | Texas |
| Adams Resources Marketing, Ltd. | Texas |
| Adams Resources Marketing GP, Inc. | Texas |
| Adams Resources Marketing II, Inc. | Nevada |
| Gulfmark Energy Marketing, Inc. | Nevada |
| Adams Exploration UK Limited | United Kingdom |
| Adams Resources UK Limited | United Kingdom |
