| Symbol | Name | Country | Exchange |
|---|---|---|---|
| SLB | Schlumberger N.V. | US | NYSE |
| PGEJF | Petroleum Geo Svcs | US | OTC |
| TGSGY | TGS-NOPEC Geophysical Company ASA | US | OTC |
| EMGS | Electromagnetic Geoservices ASA | NO | OL |
| SLB | Schlumberger NV | FR | PA |
| E2M | ElectroMagnetic GeoServices ASA | DE | F |
| SCL | Schlumberger Limited | DE | F |
| SLBN | Schlumberger Limited | MX | MX |