| OPU | No. of Staff |
| ASEAN Bintulu Fertilizer Sdn Bhd | 10
|
| KLCC Projeks Services Sdn Bhd | 1
|
KLCC Property Holdings
| 1
|
| KLCC Urusharta Sdn Bhd | 1
|
| Malaysian Refining Company Sdn Bhd | 43
|
| Malaysia LNG Sdn Bhd | 57
|
| PETRONAS Chemicals Ammonia Sdn Bhd | 8
|
| PETRONAS Chemicals Derivatives Sdn Bhd | 12
|
| PETRONAS Chemicals Ethylene Sdn Bhd | 8
|
| PETRONAS Chemicals Fertiliser Kedah Sdn Bhd | 10
|
| PETRONAS Chemicals Marketing (Labuan) Ltd | 12
|
| PETRONAS Chemicals Methanol Sdn Bhd | 11
|
| Pengerang Chemicals MTBE Sdn Bhd | 17
|
| PETRONAS Chemicals Polyethylene Sdn Bhd | 2
|
| Pengerang Refining Company Sdn Bhd | 16
|
| PETRONAS Chemicals Group Berhad | 25
|
| PETRONAS Refinery and Petrochemical Corporation Sdn Bhd | 37
|
| PETRONAS Chemicals Fertiliser Sabah Sdn Bhd | 4
|
| PETRONAS Energy & Gas Trading Sdn Bhd | 3
|
| PETCO Trading Labuan Company Ltd | 10
|
| Petroliam Nasional Berhad | 504
|
| PETRONAS Carigali Sdn Bhd | 271
|
| PETRONAS Chemicals Group Bhd | 2
|
| PETRONAS Chemicals Isononanol Sdn Bhd | 3
|
| PETRONAS Chemicals LDPE Sdn Bhd | 2
|
| PETRONAS Chemicals Olefin | 2
|
PETRONAS Dagangan Berhad
| 53
|
| PETRONAS Digital Sdn Bhd | 56
|
| PETRONAS Floating LNG (Satu) Ltd | 10
|
| PETRONAS Gas Berhad | 35
|
| PETRONAS ICT Sdn Bhd | 2
|
| PETRONAS LNG Ltd | 6
|
| PETRONAS Management Training Sdn Bhd | 13
|
| PETRONAS Penapisan (Terengganu) Sdn Bhd | 35
|
| PETRONAS Research Sdn Bhd | 3
|
| PETRONAS Technical Services Sdn Bhd | 26
|
| PETRONAS Technical Training Sdn Bhd | 9
|
| Petrosains Sdn Bhd | 2
|
| PRPC Utilities and Facilities Sdn Bhd | 18
|
| Regas Terminal (Sg Udang) | 1
|
Universiti Teknologi PETRONAS
| 365
|
