AllianceBernstein Holding, L.P.

AmeriGas Partners, L.P.

The Blackstone Group

Blueknight Energy Partners, L.P.

Calumet Specialty Products Partners, L.P.

Dorchester Minerals, L.P.

El Paso Pipeline Partners, L.P.

Enbridge Energy Partners, L.P.

Energy Transfer Partners, L.P.

Enterprise Products Partners, L.P.

Ferrellgas Partners, L.P.

Genesis Energy, L.P.

Inergy, L.P.

Kinder Morgan Energy Partners, L.P.

Magellan Midstream Partners, L.P.

Martin Midstream Partners, L.P.

Municipal Mortgage & Equity, LLC

NTS Realty Holdings, L.P.

NuStar Energy, L.P.

Rio Vista Energy Partners, L.P.

Spectra Energy Partners, L.P.

StoneMor Partners, L.P.

Suburban Propane Partners, L.P.

TransMontaigne Partners, L.P.

W.P. Carey & Co. LLC