Joint Filing Agreement
Exhibit 99.6
In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as
amended, each of the undersigned does hereby consent and agree to the joint filing on behalf of
each of them of a Statement on Schedule 13D and all amendments thereto with respect to the units
representing limited partner interests in Energy Transfer Equity, L.P. beneficially owned by each
of them, and to the inclusion of this Joint Filing Agreement as an exhibit thereto.
| Dated: May 17, 2007 | /s/ Xxx X. Xxxxxx | |||
| Xxx X. Xxxxxx | ||||
| Dated: May 17, 2007 | XXX XXXXXX LLC |
|||
| By: | /s/ Xxxxxxx X. Xxxxxxxx | |||
| Xxxxxxx X. Xxxxxxxx | ||||
| Executive Vice President | ||||
| Dated: May 17, 2007 | EPE HOLDINGS, LLC |
|||
| By: | /s/ Xxxxxxx X. Xxxxxxxx | |||
| Xxxxxxx X. Xxxxxxxx | ||||
| Executive Vice President | ||||
| Dated: May 17, 2007 | ENTERPRISE GP HOLDINGS L.P. By: EPE HOLDINGS, LLC |
|||
| By: | /s/ Xxxxxxx X. Xxxxxxxx | |||
| Xxxxxxx X. Xxxxxxxx | ||||
| Executive Vice President | ||||
