| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALTELIUM LTD | 11693136 | 01/07/2021 | Insolvent |
| Esrom Services | 02938178 | 13/06/1994 | Dissolved |
| POOL REINSURANCE (NUCLEAR) LIMITED | 03084992 | 13/02/2007 | Silver |
| River House Capital Ltd | 03118367 | 20/10/1995 | Dissolved |
| TRUST UNDERWRITING LIMITED | 02815158 | 17/09/2006 | Silver |
| TRUST UNDERWRITING LIMITED | 02815158 | 17/08/2017 | Silver |
| WESTCREEK HOLDINGS LTD | 15311821 | 02/01/2024 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADVENT UNDERWRITING LIMITED | 01227004 | 25/06/2010 | 28/02/2019 | Gold |
| Boncaster Administration Services Ltd | 02963523 | 05/10/1994 | 03/01/1995 | Dissolved |
| DUNCANSON & HOLT SYNDICATE MANAGEMENT LIMITED | 03116934 | 23/10/1995 | 06/11/1995 | Dissolved |
| EVERSHEDS PROPERTIES LIMITED | 02649325 | 01/05/1996 | 21/12/2001 | One Red Flag |
| EVERSHEDS SUTHERLAND (INTERNATIONAL) LLP | OC304065 | 30/04/2003 | 30/04/2006 | Bronze |
| EXCELLET INVESTMENTS LIMITED | 00688980 | 10/09/1996 | 18/07/2005 | Dissolved |
| Frost & Partners Ltd | 03082364 | 21/07/1995 | 01/08/1995 | Dissolved |
| GRACECHURCH UTG NO. 353 LIMITED | 03118370 | 20/10/1995 | 23/10/1995 | Dissolved |
| MALAYAN INSURANCE COMPANY (U.K.) LIMITED | 01420622 | 07/07/1991 | 28/04/2010 | Dissolved |
| MARKET INSURANCE BROKERS LIMITED | 02733989 | 14/04/2009 | 04/03/2016 | One Red Flag |
| PHILIP WILSON INVESTMENTS LTD. | 02855050 | 12/11/1993 | 20/12/1993 | Dissolved |
| QUICKNESS LIMITED | 01552582 | 10/09/1996 | 18/07/2005 | Dissolved |
| S.C.C. AT LLOYD'S LIMITED | 02956054 | 10/11/1994 | 11/11/1994 | Dissolved |
| SUN LIFE FINANCIAL OF CANADA UK LIMITED | 05289257 | 17/11/2004 | 17/11/2004 | Dissolved |
| Vantage Underwriting Ltd | 02710896 | 07/10/1992 | 08/12/1992 | Dissolved |