| POSCO Australia | 100.0 | | - | |
| 浦亞實業有限公司 | 100.0 | | - | |
| POSCO Australia | - | - | - | |
| Posco (Zhangjiagang) Stainless Steel | 58.60 | - | - | |
| POSCO INDIA PROCESSING CENTER PRIVATE LIMITED | 93.0 | | - | |
| POSCO- INDIA PUNE PROCESSING CENTER PRIVATE LIMITED | - | | - | |
| POSCO INTERNATIONAL INDIA PRIVATE LIMITED | - | | - | |
| 포스코에너지(주) | 74.7 | | - | |
| POSCO MEXICO SA DE CV | - | | - | |
| POSCO-INDIA PRIVATE LIMITED | - | | | |
| POSCO Yamato Vina Steel | 51.00 | - | - | |
| POSCO FLOW CANADA INC. | 100.000 | | - | |
| PT POSCO INDONESIA JAKARTA PROCESSING CENTER | 70.5 | | - | |
| 9404-5515 Québec Inc | - | - | - | |
| PT Krakatau Posco | 50.00 | - | - | |
| POSCO China Holding | 100.00 | - | - | |
| POSCO International | 70.7 | | - | |
| (주)포스코이앤씨 | 52.8 | | - | |
| POSCO International | 70.71 | - | - | |
| 포스코기술투자 주식회사 | 100 | | - | |
| POSCO TMC INDIA PRIVATE LIMITED | - | | - | |
| Posco Vietnam | 100.00 | - | - | |
| S-Power | - | - | - | |
| POSCO Canada Limited | 100.0 | | - | |
| Allegheny Metallurgical | 22.00 | - | - | |
| POSCO MAHARASHTRA STEEL PRIVATE LIMITED | - | | - | |
| Samcheok Blue Power | 34.00 | - | - | |