| Aqvn Ltd | Harrow | 2015 |
| Aqwa Management Ltd | St. Albans | 2025 |
| Aqwaa Limited | Ilford | 2018 |
| Aqwace Ltd | Horsham | 2019 |
| Aqxi Limited | London | 2001 |
| Aqxmmc Limited | Derby | 2014 |
| AR & AR Surveyors Ltd | Broadstone | 2025 |
| AR & CM Co. Ltd | Elstree, Borehamwood | 2019 |
| AR & Co Accountants Limited | Bolton | 2025 |
| AR & Co Consultancy Ltd | Preston | 2025 |
| AR & My Quality Ltd | London | 2023 |
| AR & Partners Consulting Ltd | York | 2016 |
| AR & R Research Enterprises Ltd | Newport | 2026 |
| AR + C Systems Limited | Northend Rd, London | 2003 |
| AR 100 Limited | Portsmouth | 2026 |
| AR Accountancy Consultancy and Legal Services Ltd | London | 2025 |
| AR Accountancy Services Limited | London | 2013 |
| AR Accountancy Services Scotland Limited | Edinburgh | 2024 |
| AR Accounting (Dorset) Limited | Weymouth | 2017 |
| AR Accounting Services Limited | Leamington Spa | 2016 |
| AR Advice Limited | London | 2015 |
| AR Advisory Ltd | London | 2020 |
| AR Advisory Services Ltd | Billericay | 2024 |
| AR Amser Ltd | Cardiff | 2019 |
| AR Analytics Ltd | London | 2025 |
| AR Architecture Ltd | London | 2010 |
| AR Automobiles Ltd | Romford | 2024 |
| AR Bespoke Kitchens Ltd | Kingswinford | 2026 |
| AR Blackout Ltd | London | 2022 |
| AR Building Management Limited | Brentford | 2016 |
| AR Business & IT Solutions Ltd | Hayes | 2023 |
| AR Business Limited | Winsford | 2009 |
| AR Business Solutions Ltd | Manchester | 2002 |
| AR CCM Limited | Rugby | 2016 |
| AR Collinson Building Consultancy Ltd | Barnet | 2015 |
| AR Complaints Insight-Led Optimisation Ltd | Mildenhall | 2026 |
| AR Concepts Limited | Surrey | 1998 |
| AR Construction & Engineering Ltd | Northampton | 2018 |
| AR Construction Management Limited | Cardiff | 2024 |
| AR Consultancy & Co (Accountants) Ltd | Brighouse | 2021 |
| AR Consultancy (UK) Ltd | Salford | 2014 |
| AR Consultancy London Ltd | Slough | 2022 |
| AR Consultancy NE Limited | Middlesbrough | 2024 |
| AR Consultancy Services (UK) Ltd | London | 2014 |
| AR Consultancy Solutions Ltd | Canterbury | 2026 |
| AR Consulting Limited | Surrey | 1996 |
| AR Consulting Services Ltd | | 2003 |
| AR Consulting Solutions Ltd | Devon | 2003 |
| AR Conveyancing Ltd | Dewsbury | 2018 |
| AR Corporate Ltd | Bradford | 2025 |
| AR Corporate Services (Burton) Ltd | Derby | 2020 |
| AR Corporate Services Ltd | Derby | 2018 |
| AR Cost & Pricing Ltd | Leeds | 2022 |
| AR Creative Ltd | Sale | 2025 |
| AR Defence Consultants Ltd | Birmingham | 2024 |
| AR Design & Project Management Limited | London | 2008 |
| AR Design Studio Ltd | Winchester | 2011 |
| AR Digital Specialists Ltd | Caerphilly | 2024 |
| AR Digital Surveys Ltd | Manchester | 2021 |
| AR East Consulting Ltd | Upminster | 2025 |
| AR Elite Accounting Solutions Ltd | Greenford | 2022 |
| AR Engineering Consultancy Ltd | Birmingham | 2019 |
| AR Engineering Limited | Kingston Upon Thames | 2025 |
| AR Enterprise London Ltd | London | 2020 |
| AR Equine Veterinary Dentistry Ltd | Chester | 2019 |
| AR Evans Engineering Ltd | Barry | 2015 |
| AR Financial Management Ltd | Camberley | 2017 |
| AR Financials Ltd | Ilford | 2021 |
| AR Fire Ltd | Chatham | 2019 |
| AR Fitness & Mentoring Limited | Orpington | 2024 |
| AR FM Ltd | Birmingham | 2024 |
| AR Gardiner & Co. Ltd | Crockenhill | 2011 |
| AR Geo-Environmental Ltd | Huddersfield | 2018 |
| AR Global Consulting Ltd | Crawley | 2018 |
| AR Guidance Ltd | London | 2024 |
| AR Holding Group Limited | Birmingham | 2019 |
| AR Hospitality Consulting Ltd | Glasgow | 2023 |
| AR Industries Limited | Harrogate | 2022 |
| AR Innoteq Limited | Southampton | 2020 |
| AR Inspection Services Limited | Stockton On Tees | 2023 |
| AR Institutional Advisory Ltd | London | 2026 |
| AR Instrument Engineering Limited | Airdrie | 2014 |
| AR Integrated Consulting Ltd | Watford | 2026 |
| AR Investment Management Limited | Chelmsford | 2011 |
| AR Law Consultancy Ltd | Sheffield | 2025 |
| AR Lean Solutions Ltd | Limavady | 2025 |
| AR Ledger Solutions Limited | Bedford | 2021 |
| AR Legacy Ltd | Brimstage Road | 2026 |
| AR Legal Consultants Ltd | Leicester | 2015 |
| AR Legal Limited | | 2006 |
| AR Legal Services Limited | Harrow | 2025 |
| AR Legal Solutions Ltd | Leicester | 2025 |
| AR Lift Services UK Ltd | Bolton | 2025 |
| AR Lingo Ltd | Rochester | 2025 |
| AR Locum Solutions Limited | Preston | 2018 |
| AR Management Consultancy Ltd | Birmingham | 2025 |
| AR Management Services Ltd | Portsmouth | 2025 |
| AR Mcardle Consulting Limited | Warrington | 2024 |
| AR Medical Billing Services Ltd | Newtownabbey | 2021 |
| AR Medical Group Ltd | London | 2021 |