• America First Tax-Exempt Investors, L.P.

• AmeriGas 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, L.P.

• Terra Nitrogen, L.P.*

* Headquartered in state