| Service | Registered on |
| Abermed LTD | 25 Nov 2010 |
| Active Health Solutions | 29 May 2015 |
| Airbus Operations Ltd In-house Occupational Health | 25 Jan 2017 |
| Allied Milling and Baking | 23 Apr 2013 |
| Anglian Community Enterprise (ACE) | 09 Jun 2017 |
| ARC Academy UK LTD | 26 Apr 2017 |
| Armed Forces Defence Primary Health Care | 30 Oct 2013 |
| Ashlands Occupational Health Ltd | 11 Mar 2015 |
| Assured Occupational Health | 04 Feb 2016 |
| Aston Martin | 01 Mar 2017 |
| Auscare Professional Service Limited | 19 Sep 2016 |
| Avondale Construction | 29 Mar 2017 |
| Babcock International Group | 24 Feb 2016 |
| Back in Action UK | 12 Jun 2015 |
| Bakkavor Meals - London | 22 Aug 2014 |
| BAM Nuttall Occupational Health | 17 Aug 2017 |
| Basildon and Thurrock University NHS Foundation Trust | 24 Feb 2012 |
| Bell Work Health Ltd | 25 Apr 2017 |
| Black and Banton Occupational and Physical Health Services | 18 Aug 2014 |
| Blackpool Council Occupational Health Service | 05 Sep 2016 |