| Cargo | HGS METERING LIMITED | 🇬🇧United Kingdom | Activa | 29/4/2026 – 31/3/2016 |
| Cargo | NATIONAL GRID PARTNERS LIMITED | — | Activa | 1/5/2026 – 1/3/2016 |
| Cargo | NATIONAL GRID PARTNERS LIMITED | — | Activa | 1/5/2026 – 1/3/2016 |
| Cargo | NATIONAL GRID ENERGY METERING LIMITED | — | Activa | 5/5/2026 – 24/3/2016 |
| Cargo | NATIONAL GRID WILLIAM LIMITED | — | Activa | 26/5/2026 – 18/2/2016 |
| Cargo | NATIONAL GRID IFA 2 LIMITED | — | Activa | 9/5/2026 – 31/3/2016 |
| Cargo | NATIONAL GRID IFA 2 LIMITED | — | Activa | 9/5/2026 – 17/7/2014 |
| Cargo | NATIONAL GRID VIKING LINK LIMITED | — | Activa | 10/5/2026 – 24/6/2014 |
| Cargo | NATIONAL GRID VIKING LINK LIMITED | — | Activa | 10/5/2026 – 31/3/2016 |
| Cargo | THE NATIONAL GRID GROUP QUEST TRUSTEE COMPANY LIMITED | 🇬🇧United Kingdom | Liquidación | 1/1/2026 – 9/3/2016 |
| Cargo | NG NOMINEES LIMITED | 🇬🇧United Kingdom | Liquidación | 1/1/2026 – 1/3/2016 |
| Cargo | NATIONAL GRID ELECTRICITY GROUP TRUSTEE LIMITED | — | Activa | 19/5/2026 – 1/3/2016 |
| Cargo | NGC EMPLOYEE SHARES TRUSTEE LIMITED | 🇬🇧United Kingdom | Liquidación | 17/12/2025 – 17/3/2016 |
| Cargo | NATIONAL GRID NORTH SEA LINK LIMITED | — | Activa | 19/5/2026 – 30/11/2013 |
| Cargo | NEMO LINK LIMITED | — | Activa | 18/5/2026 – 30/11/2013 |
| Cargo | NATIONAL GRID INTERCONNECTOR HOLDINGS LIMITED | — | Activa | 18/5/2026 – 29/5/2013 |
| Cargo | NATIONAL GRID VENTURES LIMITED | — | Activa | 19/5/2026 – 30/11/2013 |
| Cargo | NATIONAL GRID WILLIAM LIMITED | — | Activa | 26/5/2026 – 4/11/2014 |
| Cargo | CARBON SENTINEL LIMITED | — | Activa | 19/5/2026 – 1/2/2013 |
| Cargo | NGP(IM7S)SUB LIMITED | 🇬🇧United Kingdom | Disuelta | 25/5/2026 – presente |
| Cargo | NATIONAL GRID INTERCONNECTOR HOLDINGS LIMITED | — | Activa | 18/5/2026 – 31/3/2016 |
| Cargo | NEMO LINK LIMITED | — | Activa | 18/5/2026 – 1/3/2016 |
| Cargo | CARBON SENTINEL LIMITED | — | Activa | 19/5/2026 – 31/3/2016 |
| Cargo | NATIONAL GRID VENTURES LIMITED | — | Activa | 19/5/2026 – 31/3/2016 |
| Cargo | NATIONAL GRID NORTH SEA LINK LIMITED | — | Activa | 19/5/2026 – 31/3/2016 |
| Cargo | NATIONAL GRID TWENTY SEVEN LIMITED | — | Activa | 20/5/2026 – 18/2/2016 |
| Cargo | NATIONAL GRID TWENTY EIGHT LIMITED | — | Activa | 20/5/2026 – 18/2/2016 |
| Cargo | NATIONAL GRID TWENTY-FIVE LIMITED | — | Disuelta | 26/5/2026 – 8/3/2016 |
| Cargo | NATGRIDTW1 LIMITED | — | Activa | 24/5/2026 – 8/3/2016 |
| Cargo | STARGAS NOMINEES LIMITED | 🇬🇧United Kingdom | Activa | 8/1/2026 – 8/3/2016 |
| Cargo | NG NOMINEES LIMITED | 🇬🇧United Kingdom | Liquidación | 1/1/2026 – 1/3/2016 |
| Cargo | GRAIN LNG LIMITED | 🇬🇧United Kingdom | Activa | 10/12/2025 – 1/3/2016 |
