| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Bioincubator York Ltd | 03500762 | 18/03/1998 | Dissolved |
| CROSSCO (1126) LIMITED | 06720460 | 22/10/2008 | Dissolved |
| Elucidos Ltd | 04527249 | 11/02/2004 | Dissolved |
| Floratech (York) Limited | 02190592 | 01/05/1991 | Dissolved |
| YORK SCIENCE AND INNOVATION GRAND TOUR | 07575030 | 23/03/2011 | Dissolved |
| York Equimed Ltd | 02622732 | 13/08/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AVACTA GROUP PLC | 04748597 | 07/08/2006 | 24/01/2014 | Amber |
| AVACTA GROUP TRUSTEE LIMITED | 07855251 | 21/11/2011 | 11/01/2016 | Not Trading |
| AVACTA LIMITED | 05024950 | 01/12/2005 | 21/01/2011 | One Red Flag |
| CONNECT YORKSHIRE | 04238885 | 08/12/2003 | 26/04/2010 | Amber |
| CROSSCO (1128) LIMITED | 04243402 | 05/07/2001 | 31/03/2009 | Dissolved |
| Captain Cook Enterprises (Whitby) Ltd | 04919923 | 19/07/2006 | 19/11/2007 | Dissolved |
| Chamber Management Services (Leeds Bradford York & North Yor | 02773152 | 22/01/1996 | 04/08/1997 | Dissolved |
| EBORACUM ROMAN CENTRE LIMITED | 02205858 | 19/05/2017 | 27/09/2024 | Not Trading |
| Foss Electric (U K) Holdings Ltd | 02567146 | 28/04/1995 | 04/03/1998 | Dissolved |
| Foss Electric Development (Uk) Ltd | 01454022 | 04/03/1998 | 10/03/2000 | Dissolved |
| H412 LIMITED | 04552772 | 25/02/2003 | 14/07/2008 | Dissolved |
| JVC RETAIL LIMITED | 03477326 | 19/05/2017 | 27/09/2024 | Bronze |
| KNOWLEDGE BASE (UK) LIMITED | 03537916 | 23/03/1999 | 24/09/2002 | Dissolved |
| LG01 LIMITED | 04119660 | 01/12/2004 | 29/06/2006 | Dissolved |
| PCT SHAREHOLDERS LIMITED | 04216368 | 27/03/2003 | 02/11/2012 | Dissolved |
| The Captain James Cook R.N. (Charity Trust) Whitby Ltd. | 03542344 | 19/07/2006 | 31/12/2007 | Dissolved |
| VIOPOINT LIMITED | 02571002 | 23/09/1999 | 09/10/2008 | Dissolved |
| White Rose Research Ltd | 03477307 | 26/08/1998 | 31/07/2004 | Dissolved |
| Y.C.R. PROMOTIONS LIMITED | 02618142 | 09/09/2010 | 22/09/2016 | Gold |
| Y.C.R. SCIENTIFIC DEVELOPMENTS LIMITED | 04194001 | 09/09/2010 | 22/09/2016 | Gold |
| YHMAN LIMITED | 03411383 | 10/11/1997 | 09/11/2001 | Dissolved |
| YNY LTD. | 02978412 | 12/03/1996 | 31/03/2004 | Dissolved |
| YORK & NORTH YORKSHIRE INWARD INVESTMENT BOARD LIMITED | 03416897 | 08/08/1997 | 18/05/2011 | Dissolved |
| YORK AND NORTH YORKSHIRE CHAMBER OF COMMERCE | 02209567 | 18/04/1994 | 15/07/2003 | Not Trading |
| YORK ARCHAEOLOGICAL TRUST FOR EXCAVATION AND RESEARCH LIMITED | 01430801 | 19/05/2017 | 27/09/2024 | Bronze |
| YORK PROFESSIONALS | 04157901 | 08/03/2001 | 26/07/2007 | Gold |
| YORK SCIENCE PARK LIMITED | 02939132 | 28/07/1994 | 31/12/2012 | Silver |
| YORK SOFTWARE ENGINEERING LIMITED | 02281633 | 05/02/1992 | 21/11/1997 | Dissolved |
| YORKSHIRE BUILDING SOCIETY CHARITABLE FOUNDATION | 03545437 | 01/06/1998 | 01/01/2004 | Gold |
| YORKSHIRE CANCER RESEARCH | 01919823 | 20/04/2006 | 22/09/2016 | Gold |
| YORKSHIRE UNIVERSITIES | 03467035 | 13/05/1998 | 12/04/2000 | Silver |
| YORKTEST GROUP LIMITED | 06725045 | 22/10/2008 | 20/11/2009 | Dissolved |
| YORKTEST LABORATORIES LIMITED | 03570476 | 30/07/1999 | 31/03/2009 | Silver |