JOINT FILING AGREEMENT
Exhibit A
The undersigned hereby agree that the Statement on Schedule 13D with respect to the Common
Stock of Superior Offshore International, Inc., dated as of April 27, 2007, is, and any amendments
thereto (including amendments on Schedule 13G) signed by each of the undersigned shall be, filed on
behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the
Securities Exchange Act of 1934.
Date: April 27, 2007
| XXXXXXXX HOLDINGS, LP |
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| By: | Xxxxxxxx Holdings GP, LLC, | |||
| its general partner | ||||
| By: | /s/ R. Xxxxxx Xxxx, Xx. | |||
| R. Xxxxxx Xxxx, Xx. | ||||
| Manager | ||||
| XXXXXXXX HOLDINGS GP, LLC |
||||
| By: | /s/ R. Xxxxxx Xxxx, Xx. | |||
| R. Xxxxxx Xxxx, Xx. | ||||
| Manager | ||||
| /s/ Xxxxx X. Xxxxxxxx, Xx. | ||||
| Xxxxx X. Xxxxxxxx, Xx. | ||||
| /s/ R. Xxxxxx Xxxx, Xx. | ||||
| R. Xxxxxx Xxxx, Xx. | ||||
