- ENI Pakistan Ltd.
- United Energy Pakistan Limited
- MARI Petroleum Limited
- MOL Pakistan
- OMV Pakistan GmbH
- Ocean Pakistan Limited
- Pakistan Refinery Limited
- Pakistan Petroleum Limited
- Shell Pakistan Limited
- Sui Southern Gas Company Limited
- Sui Northern Gas Pipeline Limited
- OGDCL
- Lotte Pakistan Limited.
- Bristish Petroleum
- United Energy Pakistan Limited.
- Pakistan Petroleum Limited.
- Mari Gas Company Limited.
- MOL Pakistan.
- OMV Pakistan GmbH.