| 9-13 Grosvenor Street (Gp) Ltd. | Site(s) | Construction and Building Management | 2010 | Pending Recertification | Certification |
|
| 99 Bishopsgate Management Ltd. | Site(s) | Construction and Building Management | 2010 | Pending Recertification | Certification |
|
| AECOM Design Build Ltd | Site(s) | Construction and Building Management | 2009 | Current | Recertification |
|
| AJS Ltd | Organisation | Construction and Building Management | 2011 | Current | Certification |
|
| API Laminates Ltd | Organisation | Manufacture of Basic Materials | 2010 | Pending Recertification | Certification |
|
| ATKINS | Organisation | Construction and Building Management | 2009 | Current | Recertification |
|
| AXA PPP Healthcare Ltd | Organisation | Financial Services | 2011 | Current | Certification |
|
| Abbey Corrugated | Organisation | Industrials and Manufacturing | 2008 | Pending Recertification | Recertification |
|
| Aero Engine Controls | Site(s) | Industrials and Manufacturing | 2010 | Pending Recertification | Certification |
|
| AkzoNobel Decorative Paints UK | Organisation | Household and Consumer Goods | 2009 | Current | Recertification |
|
| Albert Bartlett & Sons (Airdrie) Ltd | Site(s) | Food Production and Agriculture | 2011 | Current | Certification |
|
| Alexander Ross Holdings Ltd | Organisation | Household and Consumer Goods | 2010 | Pending Recertification | Certification |
|
| Allen & Overy LLP | Organisation | Hi-Tech and Professional Services | 2010 | Current | Recertification |
|
| Allianz (UK) Ltd | Organisation | Financial Services | 2010 | Pending Recertification | Certification |
|
| Aluminium Lighting Company | Organisation | Construction and Building Management | 2011 | Current | Certification |
|
| Angus Council | Organisation | Public Sector | 2009 | Current | Recertification |
|
| Antalis Mcnaughton Ltd | Organisation | Manufacture of Basic Materials | 2010 | Current | Certification |
|
| Arena Coventry Limited | Organisation | Hospitality and Leisure | 2010 | Pending Recertification | Certification |
|
| Arriva Group Plc | Division(s) | Transport and Infrastructure | 2010 | Pending Recertification | Certification |
|
| Arriva Trains Wales/Trenau Arriva Cymru Ltd | Division(s) | Transport and Infrastructure | 2010 | Pending Recertification | Certification |
|
