| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| EISER FINANCE LIMITED | 07081466 | 19/11/2009 | Silver |
| EISER INFRASTRUCTURE LIMITED | 05375885 | 14/03/2005 | Bronze |
| EISER INFRASTRUCTURE PARTNERS LLP | OC349990 | 12/11/2009 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ANKA ACQUISITION LIMITED | 06690143 | 05/09/2008 | 01/06/2017 | Amber |
| ANKA BORROWER LIMITED | 06690145 | 05/09/2008 | 01/06/2017 | One Red Flag |
| ANKA FINANCE LIMITED | 06690165 | 05/09/2008 | 01/06/2017 | Bronze |
| ANKA HOLDINGS LIMITED | 06690348 | 05/09/2008 | 01/06/2017 | Amber |
| BELFAST CITY AIRPORT LIMITED | NI016363 | 24/09/2008 | 01/06/2017 | Amber |
| ESP UTILITIES GROUP LIMITED | 02612105 | 01/01/2007 | 15/10/2010 | Silver |
| GLOBAL INFRASTRUCTURE INVESTOR ASSOCIATION LIMITED | 09668904 | 03/07/2015 | 31/12/2016 | Gold |
| VIKING CONSORTIUM ACQUISITION LIMITED | 06067505 | 25/04/2007 | 20/08/2015 | Gold |
| VIKING CONSORTIUM BORROWER LIMITED | 06067188 | 25/04/2007 | 31/05/2016 | Dissolved |
| VIKING CONSORTIUM FINANCE LIMITED | 06067517 | 25/04/2007 | 31/05/2016 | Dissolved |
| VIKING CONSORTIUM HOLDINGS LIMITED | 06067492 | 25/04/2007 | 31/05/2016 | Dissolved |
| YORKER HOLDINGS PKR LIMITED | 06003338 | 06/12/2006 | 03/09/2010 | Bronze |
| ZEALBURG HOLDINGS LIMITED | 06003327 | 06/12/2006 | 03/09/2010 | One Red Flag |
| ZOOM GAS PIPELINES LIMITED | 05777713 | 03/11/2016 | 01/06/2017 | Bronze |
| ZOOM HOLDING LIMITED | 05777758 | 03/11/2016 | 01/06/2017 | Silver |
| ZOOM INFRASTRUCTURE LIMITED | 05777905 | 03/11/2016 | 01/06/2017 | Silver |