| Amount | Holding |
|---|---|
| 12.27% | Helmerich & Payne, Inc |
| 9.03% | Southwestern Energy Company |
| 6.93% | Range Resources Corporation |
| 6.14% | Renewable Energy Group, Inc |
| 6.09% | Dril-Quip, Inc |
| 5.62% | PDC Energy, Inc |
| 5.04% | Core Laboratories N.V |
| 4.56% | Archrock, Inc |
| 3.57% | Oceaneering International, Inc |
| 2.67% | Helix Energy Solutions Group, Inc |