| Advanced Payroll Services Limited | Peterborough | 2001 |
| Advanced Performance Engineering Ltd | Alfreton | 2021 |
| Advanced Personnel Limited | London | 2017 |
| Advanced Personnel Management (UK) Limited | London | 2006 |
| Advanced Pest Control Limited | Altrincham | 2000 |
| Advanced Pest Management Limited | Market Drayton | 2014 |
| Advanced Power Sweeping Limited | Bristol | 2015 |
| Advanced Primary Care Group Ltd | Wolverhampton | 2017 |
| Advanced Printing Solutions Ltd | Waltham Cross | 2021 |
| Advanced Processing Machinery Limited | Rugby | 2016 |
| Advanced Properties & Rental Limited | London | 2017 |
| Advanced Protection Group UK Ltd | Middlesbrough | 2018 |
| Advanced Protection Ltd | Clacton-On-Sea | 2021 |
| Advanced Protection North East Ltd | Consett | 2024 |
| Advanced Protection Services Limited | Slough | 2010 |
| Advanced Protective Systems Ltd | Leicester | 1996 |
| Advanced Recruit Ltd | Hollinwood | 2018 |
| Advanced Recruitment Services Limited | Penkridge | 2022 |
| Advanced Recruitment Solutions Limited | Kirkcaldy | 2005 |
| Advanced Recycling Equipment Ltd | Sandwich | 2023 |
| Advanced Remote Solutions Ltd | Newcastle Upon Tyne | 2026 |
| Advanced Rental Limited | Denbigh | 2013 |
| Advanced Resource Managers Engineering Limited | Portsmouth | 2001 |
| Advanced Resource Managers IT Limited | Portsmouth | 1996 |
| Advanced Resourcing Limited | Wolverhampton | 2024 |
| Advanced Roofline Installations Ltd | Dunfermline | 2017 |
| Advanced Rope Access Engineering Ltd | Hull | 2018 |
| Advanced Safety Plus Ltd | Retford | 2017 |
| Advanced Satellite Solutions Limited | Cardiff | 2005 |
| Advanced SC Ltd | London | 2013 |
| Advanced Sealed Units Limited | London | 2009 |
| Advanced Search & Selection Ltd | | 2004 |
| Advanced Secure Technologies Ltd | Cardiff | 1995 |
| Advanced Security Group Limited | Edgware | 2015 |
| Advanced Security Ltd | Littlehampton | 2023 |
| Advanced Security Management Ltd | London | 2019 |
| Advanced Security Partners Limited | Leeds | 2006 |
| Advanced Security Systems Limited | Bradley Stoke | 2003 |
| Advanced Security Systems UK Ltd. | Ashton-Under-Lyne | 1998 |
| Advanced Selling Skills Academy Limited | York | 2002 |
| Advanced Service Plus Limited | Livingston | 2020 |
| Advanced Services 101 Limited | Croydon | 2025 |
| Advanced Shine Ltd | Shrewsbury | 2022 |
| Advanced Site Engineering Surveys Limited | Kingston Upon Thames | 2007 |
| Advanced Smoke Controls Ltd | Leicester | 2015 |
| Advanced Smoke Group Limited | Leicester | 2008 |
| Advanced Smoke Solutions Ltd | Ongar | 2026 |
| Advanced Solutions Midlands Ltd | Stone | 2017 |
| Advanced Staffing Solutions Ltd | Lancaster | 2025 |
| Advanced Stairlifts (Scotland) Limited | Inverkeithing | 1997 |
| Advanced Surface Treatments (Coventry) Limited | London | 2016 |
| Advanced Systems South West Ltd | Bristol | 2019 |
| Advanced Taxation Solutions Limited | Billericay | 2019 |
| Advanced Technical Cleaning Solutions UK Limited | Liverpool | 2024 |
| Advanced Technical Recruitment Limited | Brixham | 2006 |
| Advanced Techniques Limited | Preston | 2026 |
| Advanced Technology Installations Limited | Alton | 2005 |
| Advanced Technology Ventures (UK) Ltd | Huntingdon | 2008 |
| Advanced Traffic Services Limited | Milton Keynes | 2019 |
| Advanced Training (Tapes & Publications) Limited | | 1989 |
| Advanced Training Centre Ltd | Newcastle Upon Tyne | 2024 |
| Advanced Travel Partners UK Ltd | Manchester | 1990 |
| Advanced Travel Technologies Limited | London | 2015 |
| Advanced Tree Solutions Limited | West Malling | 2020 |
| Advanced Trees & Grounds Limited | Filey | 2012 |
| Advanced Trims Limited | Wednesbury | 2025 |
| Advanced Turf Technology Ltd | Barnsley | 2016 |
| Advanced Underwater Systems Limited | Plymouth | 2017 |
| Advanced Utility Solutions Limited | Middlesbrough | 2006 |
| Advanced Vehicle Cleaning Supplies Ltd | Rainham | 2004 |
| Advanced Vehicle Contracts Limited | Warwick | 2000 |
| Advanced Vehicle Security Ltd | Stourbridge | 2020 |
| Advanced Video Analytics Limited | Mansfield | 2025 |
| Advanced Virtual Solutions Ltd | London | 2026 |
| Advanced Vision Systems Limited | Slough | 2011 |
| Advanced Water Maintenance Ltd | Burnley | 1999 |
| Advanced Watercoolers Ltd | Abingdon | 2018 |
| Advanced Watering Systems Ltd | Southampton | 2023 |
| Advanced Well-Being Ltd | Milton Keynes | 2023 |
| Advanced Wind Training Academy Ltd | Teesside | 2022 |
| Advanced Window and Door Systems Ltd | Wirral | 2024 |
| Advanced Window Cleaning Ltd | Hornchurch | 2022 |
| Advanced Workforce Solutions Limited | Grimsby | 2020 |
| Advancedchem Limited | Kettering | 2019 |
| ADVANCEDK9SOLUTIONS Limited | Kettering | 2014 |
| Advancedtelematics Ltd | Cheadle | 2022 |
| Advancehgvfleetwash Ltd | Nottingham | 2026 |
| Advancehomeservice Ltd | Rainham | 2023 |
| Advancement Gateway UK Ltd | London | 2020 |
| Advancement of Community Empowerment C.I.C. | Halifax | 2013 |
| Advancing Innovations Limited | Nottingham | 2010 |
| Advancing Limited | Birmingham | 2011 |
| Advancing People and Processes Limited | Malvern | 2006 |
| Advancing People Limited | Bedford | 2009 |
| Advancing Research Group Limited | London | 2026 |
| Advancing Your Potential Ltd | London | 2017 |
| Advans Cleaning Ltd | Leicester | 2024 |
| Advant - Training Limited | Bedworth | 2022 |
| Advant Manpower Ltd | London | 2022 |
| Advant Vehicle Services Ltd | London | 2022 |