| TGS ASA CVR 976695372 | OwnerLegal Owner | Since 2024 | 0.0% | Active |
| TGS OPERATIONS AS CVR 911689324 | BoardBoard of Directors | Since 2025 | — | Active |
| TGS AS CVR 914548624 | BoardBoard of Directors | Since 2022 | — | Active |
| TGS NES AS CVR 938199833 | BoardBoard of Directors | Since 2025 | — | Active |
| MAGSEIS FAIRFIELD AS CVR 994547852 | BoardBoard of Directors | Since 2025 | — | Active |
| IMAGEDESK AS CVR 997499689 | BoardBoard of Directors | Since 2016 | — | Active |
| PETROLEUM GEO-SERVICES AS CVR 921675801 | BoardBoard of Directors | Since 2024 | — | Active |
| PGS SHIPOWNER AS CVR 923821368 | BoardBoard of Directors | Since 2024 | — | Active |
| PGS HOLDING II LTD NUF CVR 926188984 | BoardBoard of Directors | Since 2024 | — | Active |
| PGS HOLDING I LTD NUF CVR 926189042 | BoardBoard of Directors | Since 2024 | — | Active |
| PGS GEOPHYSICAL AS CVR 960563085 | BoardBoard of Directors | Since 2024 | — | Active |
| MULTIKLIENT INVEST AS CVR 971171537 | BoardBoard of Directors | Since 2024 | — | Active |
| PGS FALCON AS CVR 993442836 | BoardBoard of Directors | Since 2024 | — | Active |
| PGS TITANS AS CVR 998167000 | BoardBoard of Directors | Since 2024 | — | Active |
| TGS PREDIKTOR AS CVR 998474574 | BoardBoard of Directors | Since 2025 | — | Active |
| LØNNÅSEN HUSEIERFORENING CVR 911893665 | BoardBoard of Directors | Since 2026 | — | Active |