| Absynth Solutions Limited | Altrincham | 2013 |
| ABT Business Solutions Limited | Larkhall | 2026 |
| ABT Collections Limited | Liverpool | 2019 |
| ABT Imports and Exports Trading C O Limited | London | 2024 |
| ABT L2 Limited | Cardiff | 2026 |
| ABT L5 Ltd | Cardiff | 2026 |
| ABT L6 Ltd | London | 2026 |
| ABT Logic Contractors Limited | London | 2026 |
| ABT Medicare Ltd | London | 2010 |
| ABT Staff Solution UK Ltd | Cardiff | 2026 |
| ABT Transport Limited | Blackpool | 2004 |
| ABT Valeting Services Ltd | Callington | 2026 |
| Abta 1 Limited | Surrey | 1989 |
| Abtas Services Limited | Birmingham | 2019 |
| Abth Ventures Limited | Datchet | 2023 |
| Abtl 1 Ltd | Salford | 2026 |
| Abtran Managed Services UK Limited | Holborn | 2024 |
| Abtuk Ltd | London | 2025 |
| ABU Amar's Ltd | Manor Park | 2023 |
| ABU Cleaning Services Ltd | Manchester | 2020 |
| ABU Nationwide Limited | London | 2025 |
| ABU Promotions Ltd | Welwyn Garden City | 2024 |
| ABU Travel and Tourism Ltd | Birmingham | 2024 |
| ABU Ubaidah Ltd | Preston | 2018 |
| Abu-Bakar Rentals Ltd | London | 2023 |
| Abubakerproperties Ltd | Banbury | 2026 |
| Abubakr Ecom Ltd | Wigston | 2025 |
| Abubashir Ltd | London | 2025 |
| Abuchin Limited | Newmarket | 2024 |
| Abui Solutions Limited | Lower Cambourne | 2014 |
| Abuk Investment Limited | London | 2023 |
| Abundance Awakening Retreats Ltd | Livingston | 2026 |
| Abundance Grace Care Services Ltd | Manchester | 2026 |
| Abundance Logistics Limited | Rugby | 2025 |
| Abundance Security Trustee Ltd | London | 2015 |
| Abundant Care & Recruitment Int'L Ltd | Dunmow | 2010 |
| Abundant Care Solutions Ltd | Hoddesdon | 2022 |
| Abundant Enterprises Ltd | Rochdale | 2019 |
| Abundant Healthcare Limited | Swanscombe | 2025 |
| Abundant Healthcare Solutions Ltd | Lincoln | 2025 |
| Abundant Life Family Care Ltd | London. | 2016 |
| Abundant Ltd | Cornwall | 2022 |
| Abundant R Ltd | Wallington | 2020 |
| Abundant Travel Consult Ltd | Swansea | 2025 |
| Abundantia Liverpool Limited | Ainsdale | 2019 |
| Aburgh Solutions Limited | Musselburgh | 2021 |
| Aburi Limited | London | 2014 |
| Abus (UK) Ltd | Bristol | 2004 |
| Abutos UK Limited | Erith | 2017 |
| ABV Global Ltd | London | 2014 |
| ABV Rentals Limited | Waterlooville | 2017 |
| ABV Rhoades Limited | Cheshire | 2004 |
| Abvs Services Limited | London | 2020 |
| ABW Security Ltd | Gatwick | 2025 |
| ABX Fluid Fittings Ltd | Worcester | 2008 |
| ABY Associates Ltd | Rochdale | 2015 |
| ABY Properties Limited | Sevenoaks | 2019 |
| ABY Services Ltd | London | 2019 |
| Aby&Florin Ltd | Harrow | 2025 |
| Abycare Services Limited | Manchester | 2025 |
| Abyra Cleaning Services Ltd | London | 2026 |
| Abyss Talent Solutions Ltd | Dudley | 2024 |
| ABZ Builders Limited | Wolverhampton | 2017 |
| ABZ Cleaning Solutions Ltd | Aberdeen | 2014 |
| ABZ Development Limited | Aberdeen | 2009 |
| ABZ Group Ltd | London | 2024 |
| ABZ Jetting Services Limited | Waterlooville | 2025 |
| ABZ Management Limited | Bromley | 2002 |
| ABZ Newtown Ltd | Telford | 2016 |
| ABZ Recruitment Ltd | London | 2025 |
| AC Student Travel Ltd | Stevenage | 2011 |
| AC & AA Limited | Tunbridge Wells | 2018 |
| AC Admin Services Ltd | Manchester | 2018 |
| AC Advisors Ltd. | London | 2014 |
| AC Agencies Limited | Gateshead | 2009 |
| AC Agri Sales Ltd | Kirkwall | 2024 |
| AC Agriplant Ltd | Leicester | 2023 |
| AC Art Consultancy Limited | London | 2011 |
| AC Auto Ltd | Birmingham | 2022 |
| AC BC Ltd | Colchester | 2023 |
| AC Braeuninger Consulting Ltd | London | 2022 |
| AC Business Growth Team Limited | London | 2020 |
| AC Business Solutions Limited | Trowbridge | 2018 |
| AC Business Support Services Limited | London | 2025 |
| AC Cable Solutions 2024 Ltd | Manchester | 2000 |
| AC Cable Solutions Ltd | Manchester | 2022 |
| AC Carpentry Limited | Bexley | 2017 |
| AC Chiyungi Ltd | Rowley Regis | 2015 |
| AC Cleaning Solutions Ltd | Cradley Heath | 2023 |
| AC Cleaning Support Ltd | London | 2024 |
| AC Concierge Ltd | Waltham Cross | 2024 |
| AC Concrete Pumping Ltd | Rochdale | 2014 |
| AC Connects Consultancy Limited | Lisburn | 2018 |
| AC Contracts Ltd | Dromore | 2025 |
| AC Cruz Limited | London | 2021 |
| AC Crystal Clean UK Ltd | Wolverhampton | 2025 |
| AC Davlen Limited | Chester | 2006 |
| AC Doors Wales Ltd | Cardiff | 2024 |
| AC Dynamic Solution Ltd | Cobham | 2024 |
| AC Education Limited | Bootle | 2007 |