| Plains All American Pipeline, L.P. | United States | $18,012 |
| ENN Energy Holdings Limited | China | $11,652 |
| APA Group | Australia | $8,187 |
| EnLink Midstream, LLC | United States | $5,820 |
| Buckeye Partners, L.P. | United States | $5,317 |
| TRANSNEFT, PJSC | Russia | $4,076 |
| Holly Energy Partners, L.P. | United States | $2,982 |
| NuStar Energy L.P. | United States | $2,915 |
| China Tian Lun Gas Holdings Ltd | China | $1,200 |
| ShawCor Ltd | Canada | $1,156 |
| Southcross Energy Partners, L.P. | United States | $18 |
| KSB Pumps Company Limited | Pakistan | $15 |
| Huffaz Seamless Pipe Industries Limited | Pakistan | $7 |
| Mahalaxmi Seamless Limited | India | $1 |
| BlackPoll Fleet International, Inc. | United States |
Public
|
| Azure Midstream Partners, LP | United States |
Public
|
| CNX Midstream Partners LP | United States |
Public
|
| Crestwood Midstream Partners LP | United States |
Public
|
| Enbridge Energy Partners, L.P. | United States |
Public
|
| Energy Transfer Operating LP | United States |
Public
|
| EQM 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
|
| Gazprom Gazoraspredeleniye Bryansk OAO | Russia |
Public
|
| Gazprom Gazoraspredeleniye Saratovskaya Oblast OAO | Russia |
Public
|
| Gazprom Gazoraspredeleniye Tula OAO | Russia |
Public
|
| MOL Hungarian Oil and Gas PLC | Hungary |
Public
|
| Newron Sport | Canada |
Public
|
| Orenburgoblgaz OAO | Russia |
Public
|
| PennTex Midstream Partners, LP | United States |
Public
|
| Sino Oil & Gas Holdings Ltd. | Hong Kong |
Public
|
| Suchuang Gas Corp Ltd | Hong Kong |
Public
|
| TransMontaigne Partners LLC | United States |
Public
|
| Underground Solutions, Inc. | United States |
Public
|
|
