| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ASSETHALL LIMITED | 02326976 | 08/01/2013 | Dissolved |
| BLACKWATER A LIMITED | 05046672 | 08/01/2013 | Dissolved |
| BLACKWATER B LIMITED | 05046706 | 08/01/2013 | Dissolved |
| BLACKWATER C LIMITED | 05046720 | 08/01/2013 | Dissolved |
| BLACKWATER D LIMITED | 05046728 | 08/01/2013 | Dissolved |
| BLACKWATER E LIMITED | 05046763 | 08/01/2013 | Dissolved |
| BLACKWATER H LIMITED | 05167022 | 08/01/2013 | Dissolved |
| BLACKWATER J LIMITED | 05167051 | 08/01/2013 | Dissolved |
| BRITISH TRANSCO FINANCE (NO 3) LIMITED | 04292527 | 08/01/2013 | Dissolved |
| BRITISH TRANSCO FINANCE (NO 5) LIMITED | 04394586 | 08/01/2013 | Dissolved |
| FULCRUM CONNECTIONS (EMPLOYERS) LIMITED | 03749501 | 26/09/2008 | Dissolved |
| LATTICE ENERGY SERVICES LIMITED | 03294522 | 08/01/2013 | Dissolved |
| LATTICE OPSCO LIMITED | 03294386 | 08/01/2013 | Dissolved |
| Livia Pms Ltd | 04543745 | 24/09/2002 | Dissolved |
| MAINSTREAM FORTY-SEVEN LIMITED | 02460488 | 08/01/2013 | Dissolved |
| NATGRID INVESTMENTS LIMITED | 03737709 | 08/01/2013 | Dissolved |
| NATIONAL GRID (SOUTHALL) GENERAL PARTNER LIMITED | 05123227 | 08/01/2013 | Dissolved |
| NATIONAL GRID (SOUTHALL) LP LIMITED | 05123241 | 08/01/2013 | Dissolved |
| NATIONAL GRID (US) INVESTMENTS | 03784527 | 09/09/2013 | Dissolved |
| NATIONAL GRID (US) INVESTMENTS 3 | 03867114 | 08/01/2013 | Dissolved |
| NATIONAL GRID (US) PARTNER 2 LIMITED | 04314442 | 08/01/2013 | Dissolved |
| NATIONAL GRID BRAZIL FINANCE | 04023797 | 08/01/2013 | Dissolved |
| NATIONAL GRID ELEVEN | 04350916 | 09/09/2013 | Dissolved |
| NATIONAL GRID FIFTEEN LIMITED | 04492534 | 08/01/2013 | Dissolved |
| NATIONAL GRID GOLD LIMITED | 03894139 | 08/01/2013 | Dissolved |
| NATIONAL GRID LAND DEVELOPMENTS LIMITED | 02530995 | 08/01/2013 | Dissolved |
| NATIONAL GRID LAND INVESTMENTS LIMITED | 02394159 | 08/01/2013 | Dissolved |
| NATIONAL GRID NINETEEN LIMITED | 04547934 | 11/01/2013 | Dissolved |
| NATIONAL GRID OVERSEAS LIMITED | 02444202 | 09/09/2013 | Dissolved |
| NATIONAL GRID OVERSEAS TWO LIMITED | 03932792 | 08/01/2013 | Dissolved |
| NATIONAL GRID PROPERTY (NORTHAMPTON) LIMITED | 05195302 | 08/01/2013 | Dissolved |
| NATIONAL GRID PROPERTY (WARWICK) LIMITED | 05679150 | 08/01/2013 | Dissolved |
| NATIONAL GRID PROPERTY DEVELOPMENTS LIMITED | 02630507 | 08/01/2013 | Dissolved |
| NATIONAL GRID SIX LIMITED | 04056294 | 08/01/2013 | Dissolved |
| NATIONAL GRID SIXTEEN LIMITED | 04492574 | 08/01/2013 | Dissolved |
| NATIONAL GRID TWENTY LIMITED | 04547949 | 11/01/2013 | Dissolved |
| NG LEASING LIMITED | 02678223 | 08/01/2013 | Dissolved |
| NGC INDUS LIMITED | 02444274 | 08/01/2013 | Dissolved |
| NGC TWO LIMITED | 02537095 | 08/01/2013 | Dissolved |
| NGC ZAMBIA LIMITED | 02536499 | 08/01/2013 | Dissolved |
| NGG FINANCE (NO 1) LIMITED | 04540020 | 08/01/2013 | Dissolved |
| NGT ONE LIMITED | 04865504 | 09/09/2013 | Dissolved |
| NGT TELECOM NO. 2 LIMITED | 04134417 | 08/01/2013 | Dissolved |
| NGT THREE | 05234267 | 08/01/2013 | Dissolved |
| NMP LIMITED | 02823242 | 08/01/2013 | Dissolved |
| THE NATIONAL GRID INVESTMENTS COMPANY | 02579065 | 08/01/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CADENT FINANCE PLC | 05895068 | 08/01/2013 | 03/04/2013 | Silver |
| CARBON SENTINEL LIMITED | 08116471 | 08/01/2013 | 01/02/2013 | Not Trading |
| FULCRUM CONNECTIONS LIMITED | 06228720 | 26/09/2008 | 08/07/2010 | Dissolved |
| FULCRUM GAS SERVICES LIMITED | 06006369 | 26/09/2008 | 08/07/2010 | Dissolved |
| FULCRUM GROUP HOLDINGS LIMITED | 03705715 | 26/09/2008 | 08/07/2010 | One Red Flag |
| FULCRUM PIPELINES LIMITED | 06006362 | 26/09/2008 | 08/07/2010 | Bronze |
| Livia Pms Ltd | 04543745 | 16/02/2004 | 20/03/2009 | Dissolved |
| NATIONAL GRID FOURTEEN LIMITED | 04382950 | 11/01/2013 | 31/03/2015 | Dissolved |
| NATIONAL GRID IFA 2 LIMITED | 09129992 | 14/07/2014 | 17/07/2014 | Silver |
| NATIONAL GRID INTERCONNECTOR HOLDINGS LIMITED | 08169384 | 08/01/2013 | 29/05/2013 | Silver |
| NATIONAL GRID NORTH SEA LINK LIMITED | 08082344 | 08/01/2013 | 30/11/2013 | Silver |
| NATIONAL GRID PLUS LIMITED | 03741098 | 08/01/2013 | 30/11/2013 | Silver |
| NATIONAL GRID VENTURES LIMITED | 08116497 | 08/01/2013 | 30/11/2013 | Not Trading |
| NATIONAL GRID VIKING LINK LIMITED | 09075537 | 06/06/2014 | 24/06/2014 | Gold |
| NATIONAL GRID WILLIAM LIMITED | 07290232 | 08/01/2013 | 04/11/2014 | Not Trading |
| NEMO LINK LIMITED | 08169409 | 08/01/2013 | 30/11/2013 | Gold |
| NGT TWO LIMITED | 05234289 | 08/01/2013 | 30/11/2013 | Dissolved |
| SUPERGRID LIMITED | 02444213 | 03/10/2008 | 01/03/2016 | Dissolved |