• AllianceBernstein Holding, L.P.*

• AmeriGas Partners, L.P.

• Atlas Pipeline Partners, L.P.

• The Blackstone Group, L.P.*

• Buckeye Partners, L.P.

• Calumet Specialty Products Partners, L.P.

• Centerline Holding Company*

• DCP Midstream Partners, L.P.

• Dorchester Minerals, L.P.

• Enbridge Energy Partners, L.P.

• Energy Transfer Partners, L.P.

• Enterprise Products Partners, L.P.

• Exterran Partners, L.P.

• Ferrellgas Partners, L.P.

• Fortress Investment Group LLC*

• Genesis Energy, L.P.

• Global Partners LP

• Icahn Enterprises, L.P.*

• Inergy, L.P.

• K-Sea Transportation Partners, L.P.

• Kinder Morgan Energy Partners, L.P.

• Municipal Mortgage & Equity, LLC

• NuStar Energy,L.P.

• Och-Ziff Capital Management Group LLC*

• Star Gas Partners, L.P.

• Suburban Propane Partners, L.P.

• Sunoco Logistics Partners, L.P.

• W.P. Carey & Company, LLC*

* Headquartered in state