| Plains All American Pipeline, L.P. | United States | $15,016 |
| ENN Energy Holdings Limited | Cayman Islands | $8,004 |
| Buckeye Partners, L.P. | United States | $7,773 |
| APA Group | Australia | $7,286 |
| Enbridge Energy Partners, L.P. | United States | $6,338 |
| EQT Midstream Partners, LP | United States | $6,125 |
| Oil Transporting Joint Stock Company Transneft | Russia | $4,829 |
| Tallgrass Energy Partners LP | United States | $3,558 |
| NuStar Energy L.P. | United States | $3,474 |
| EnLink Midstream, LLC | United States | $3,034 |
| Holly Energy Partners, L.P. | United States | $2,177 |
| ShawCor Ltd | Canada | $1,561 |
| CONE Midstream Partners LP | United States | $1,047 |
| China Tian Lun Gas Holdings Ltd | China | $730 |
| American Midstream Partners, LP | United States | $717 |
| TransMontaigne Partners L.P. | United States | $698 |
| Sino Oil & Gas Holdings Ltd. | Hong Kong | $320 |
| Southcross Energy Partners, L.P. | United States | $169 |
| KSB Pumps Company Limited | Pakistan | $36 |
| Huffaz Seamless Pipe Industries Limited | Pakistan | $15 |
| BlackPoll Fleet International, Inc. | United States | $5 |
| Mahalaxmi Seamless Limited | India |
Public
|
| Azure Midstream Partners, LP | United States |
Public
|
| Energy Transfer 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
|
| MOL Hungarian Oil and Gas PLC | Hungary |
Public
|
| Newron Sport | Canada |
Public
|
| PennTex Midstream Partners, LP | United States |
Public
|
| Suchuang Gas Corp Ltd | Hong Kong |
Public
|
| Underground Solutions, Inc. | United States |
Public
|
|
