• AmeriGas Partners, L.P.

• Blueknight Energy Partners, L.P.

• Brookfield Infrastructure Partners, L.P.

• Enterprise Products Partners L.P.

• Ferrellgas Partners, L.P.

• Genesis Energy, L.P.

• Kinder Morgan Energy Partners, L.P.

• Magellan Midstream Partners, L.P.

• NuStar Energy L.P.

• ONEOK Partners, L.P.

• Plains All American Partners, L.P.

• StoneMor Partners, L.P.

• TC PipeLines, LP

• Terra Nitrogen, L.P.*

* Headquartered in state