| Company | Symbol | % Assets |
|---|
| Schlumberger N.V. Common Stock | SLB | 16.83 |
| Halliburton Company Common Stoc | HAL | 8.71 |
| National Oilwell Varco, Inc. Co | NOV | 7.49 |
| Baker Hughes Incorporated Commo | BHI | 5.59 |
| Transocean Ltd (Switzerland) Co | RIG | 5.14 |
| Cameron International Corporati | CAM | 4.64 |
| Ensco PLC Class A | ESV.L | 4.18 |
| FMC Technologies, Inc. Common S | FTI | 3.96 |
| Noble Corporation New Common S | NE | 3.19 |
| Weatherford International, Ltd | WFT | 3.07 |