| Symbol | Name | Country | Exchange |
|---|---|---|---|
| SDRL | Seadrill Ltd | NO | OL |
| SHLF | Shelf Drilling Ltd | NO | OL |
| SPM | Saipem SpA | IT | MI |
| 578 | KS Energy Limited | SG | SG |
| DU4 | Mermaid Maritime Public Company Limited | SG | SG |
| 600968 | CNOOC Energy Technology & Services Ltd | CN | SHG |
| 601808 | China Oilfield Services Ltd Class A | CN | SHG |