| Officer | HGS METERING LIMITED | 🇬🇧Regno Unito | Active | 29/04/2026 – 31/03/2016 |
| Officer | NATIONAL GRID PARTNERS LIMITED | — | Active | 01/05/2026 – 01/03/2016 |
| Officer | NATIONAL GRID PARTNERS LIMITED | — | Active | 01/05/2026 – 01/03/2016 |
| Officer | NATIONAL GRID ENERGY METERING LIMITED | — | Active | 05/05/2026 – 24/03/2016 |
| Officer | NATIONAL GRID WILLIAM LIMITED | — | Active | 26/05/2026 – 18/02/2016 |
| Officer | NATIONAL GRID IFA 2 LIMITED | — | Active | 09/05/2026 – 31/03/2016 |
| Officer | NATIONAL GRID IFA 2 LIMITED | — | Active | 09/05/2026 – 17/07/2014 |
| Officer | NATIONAL GRID VIKING LINK LIMITED | — | Active | 10/05/2026 – 24/06/2014 |
| Officer | NATIONAL GRID VIKING LINK LIMITED | — | Active | 10/05/2026 – 31/03/2016 |
| Officer | THE NATIONAL GRID GROUP QUEST TRUSTEE COMPANY LIMITED | 🇬🇧Regno Unito | Liquidation | 01/01/2026 – 09/03/2016 |
| Officer | NG NOMINEES LIMITED | 🇬🇧Regno Unito | Liquidation | 01/01/2026 – 01/03/2016 |
| Officer | NATIONAL GRID ELECTRICITY GROUP TRUSTEE LIMITED | — | Active | 19/05/2026 – 01/03/2016 |
| Officer | NGC EMPLOYEE SHARES TRUSTEE LIMITED | 🇬🇧Regno Unito | Liquidation | 17/12/2025 – 17/03/2016 |
| Officer | NATIONAL GRID NORTH SEA LINK LIMITED | — | Active | 19/05/2026 – 30/11/2013 |
| Officer | NEMO LINK LIMITED | — | Active | 18/05/2026 – 30/11/2013 |
| Officer | NATIONAL GRID INTERCONNECTOR HOLDINGS LIMITED | — | Active | 18/05/2026 – 29/05/2013 |
| Officer | NATIONAL GRID VENTURES LIMITED | — | Active | 19/05/2026 – 30/11/2013 |
| Officer | NATIONAL GRID WILLIAM LIMITED | — | Active | 26/05/2026 – 04/11/2014 |
| Officer | CARBON SENTINEL LIMITED | — | Active | 19/05/2026 – 01/02/2013 |
| Officer | NGP(IM7S)SUB LIMITED | 🇬🇧Regno Unito | Dissolved | 25/05/2026 – present |
| Officer | NATIONAL GRID INTERCONNECTOR HOLDINGS LIMITED | — | Active | 18/05/2026 – 31/03/2016 |
| Officer | NEMO LINK LIMITED | — | Active | 18/05/2026 – 01/03/2016 |
| Officer | CARBON SENTINEL LIMITED | — | Active | 19/05/2026 – 31/03/2016 |
| Officer | NATIONAL GRID VENTURES LIMITED | — | Active | 19/05/2026 – 31/03/2016 |
| Officer | NATIONAL GRID NORTH SEA LINK LIMITED | — | Active | 19/05/2026 – 31/03/2016 |
| Officer | NATIONAL GRID TWENTY SEVEN LIMITED | — | Active | 20/05/2026 – 18/02/2016 |
| Officer | NATIONAL GRID TWENTY EIGHT LIMITED | — | Active | 20/05/2026 – 18/02/2016 |
| Officer | NATIONAL GRID TWENTY-FIVE LIMITED | — | Dissolved | 26/05/2026 – 08/03/2016 |
| Officer | NATGRIDTW1 LIMITED | — | Active | 24/05/2026 – 08/03/2016 |
| Officer | STARGAS NOMINEES LIMITED | 🇬🇧Regno Unito | Active | 08/01/2026 – 08/03/2016 |
| Officer | NG NOMINEES LIMITED | 🇬🇧Regno Unito | Liquidation | 01/01/2026 – 01/03/2016 |
| Officer | GRAIN LNG LIMITED | 🇬🇧Regno Unito | Active | 10/12/2025 – 01/03/2016 |
