| Company | Symbol | % Assets |
|---|
| Schlumberger N.V. Common Stock | SLB | 19.21 |
| Halliburton Company Common Stoc | HAL | 8.16 |
| National Oilwell Varco, Inc. Co | NOV | 6.97 |
| Baker Hughes Incorporated Commo | BHI | 5.15 |
| Cameron International Corporati | CAM | 5.01 |
| Transocean Ltd (Switzerland) Co | RIG | 4.79 |
| FMC Technologies, Inc. Common S | FTI | 4.77 |
| Seadrill Limited Ordinary Share | SDRL | 4.47 |
| Noble Corporation New Common S | NE | 4.35 |
| Tenaris SA ADR | TS.MI | 4.24 |