| Energy Transfer Partners LP | United States | $20,063 |
| Plains All American Pipeline, L.P. | United States | $16,943 |
| Buckeye Partners, L.P. | United States | $8,447 |
| APA Group | Australia | $8,068 |
| MOL Hungarian Oil and Gas PLC | Hungary | $8,067 |
| ENN Energy Holdings Limited | Cayman Islands | $5,867 |
| EQT Midstream Partners, LP | United States | $5,865 |
| Enbridge Energy Partners, L.P. | United States | $5,210 |
| Oil Transporting Joint Stock Company Transneft | Russia | $4,346 |
| NuStar Energy L.P. | United States | $3,947 |
| Tallgrass Energy Partners LP | United States | $3,349 |
| EnLink Midstream, LLC | United States | $2,853 |
| Holly Energy Partners, L.P. | United States | $1,951 |
| ShawCor Ltd | Canada | $1,430 |
| CONE Midstream Partners LP | United States | $1,141 |
| PennTex Midstream Partners, LP | United States | $813 |
| TransMontaigne Partners L.P. | United States | $654 |
| American Midstream Partners, LP | United States | $579 |
| China Tian Lun Gas Holdings Ltd | China | $516 |
| Sino Oil & Gas Holdings Ltd. | Hong Kong | $399 |
| Southcross Energy Partners, L.P. | United States | $207 |
| KSB Pumps Company Limited | Pakistan | $40 |
| Huffaz Seamless Pipe Industries Limited | Pakistan | $26 |
| BlackPoll Fleet International, Inc. | United States |
Public
|
| Mahalaxmi Seamless Limited | India |
Public
|
| Azure Midstream Partners, LP | United States |
Public
|
| Fermaca Enterprises S. de R.L. de C.V. | Mexico |
Public
|
| Forterra, Inc. | United States |
Public
|
| Furmanite Corporation | United States |
Public
|
| Newron Sport | Canada |
Public
|
| Suchuang Gas Corp Ltd | Hong Kong |
Public
|
| Underground Solutions, Inc. | United States |
Public
|
|
