| AS IF a Phoenix Ltd | Didcot | 2025 |
| AS Investments 2018 Limited | London | 2018 |
| AS Investments SB Limited | Manchester | 2019 |
| AS Laundries Limited | Hemel Hempstead | 2025 |
| AS Locksmith Ltd | Coventry | 2024 |
| AS Lounge Ltd | Leeds | 2025 |
| AS Maintenance Limited | Nottingham | 2022 |
| AS Mentoring Ltd | London | 2013 |
| AS Mobile Limited | Darlington | 2015 |
| AS Nonlimits Ltd | London | 2025 |
| AS One Pilates Ltd | Colchester | 2016 |
| AS Physio Ltd | London | 2021 |
| AS Read Services Ltd | Leeds | 2023 |
| AS Resources Ltd | Ilford | 2019 |
| AS Salaam Gardens Limited | London | 2025 |
| AS Skin & Aesthetics Ltd | Fleetwood | 2025 |
| AS Social Care Business Consultancy Ltd | London | 2024 |
| AS Sports Therapy Ltd | Cumnock | 2025 |
| AS Steadi AS Limited | Gerrards Cross | 2016 |
| AS the Pennies Drop Ltd | Wirral | 2022 |
| AS the Studio Academy Limited | Penicuik | 2026 |
| AS Time Goes by Memorials Ltd | Redditch | 2022 |
| AS Traders Ltd | Croydon | 2013 |
| AS WE ARE Entertainment Ltd | London | 2021 |
| AS Wealth Ltd | Liverpool | 2025 |
| As&G Trustees Limited | Inverness | 2008 |
| As&Ist Limited | Newbury | 2025 |
| As&P Consulting Ltd | Maidenhead | 2018 |
| As-Computers Limited | Cleckheaton | 2013 |
| As-Nf IP Ltd | Manchester | 2020 |
| As-Siraat Ltd | Coventry | 2018 |
| ASA (Holdings) Limited | Stoke-On-Trent | 1997 |
| ASA Advisory Ltd | Harrow | 2025 |
| ASA Aesthetics Ltd | London | 2024 |
| ASA Agency Ltd | London | 2025 |
| ASA Barber Limited | Plymouth | 2025 |
| ASA Linen Ltd | High Wycombe | 2025 |
| ASA Nunn Hair Ltd | Leigh | 2025 |
| ASA Partnership Limited | Manchester | 2020 |
| ASA Practice Limited | Bishops Stortford | 2020 |
| ASA Property Services Limited | Grimsby | 2015 |
| ASA Seresin Ltd | London | 2025 |
| ASA Surveyors Limited | Swanley | 2020 |
| ASA Team Limited | Maidstone | 2019 |
| ASA UK Services Limited | Stevenage | 2025 |
| Asaad Ltd | Leicester | 2019 |
| Asad Adris Associates Limited | Oldbury | 2014 |
| Asad Cuts Ltd | East Kilbride | 2024 |
| Asadul (Service) Limited | Maldon | 1986 |
| Asaf a Limited | High Wycombe | 2023 |
| Asaf LUX Limited | Dunstable | 2023 |
| Asahi Photo Limited | Croydon | 2002 |
| Asai Construction Ltd | Wembley | 2015 |
| Asaitec Ltd | Sutton | 2015 |
| Asal Enterprise Limited | West Midlands | 2024 |
| Asal Investments Limited | London | 2011 |
| Asaliah & Asalias Ltd | London | 2024 |
| Asamai Mandir Trust (London) Limited | Northolt | 2007 |
| Asan Saba Global Trading Advisory Ltd | London | 2026 |
| Asana Health Limited | Kingston Upon Thames | 2011 |
| Asante Intl Limited | Middlesbrough | 2011 |
| Asanteni Ltd | London | 2025 |
| Asantey Ltd | Nottingham | 2023 |
| Asap 247 Home Emergency and Maintenance Ltd | West Bromwich | 2021 |
| Asap 247 Ltd | West Bromwich | 2021 |
| Asap Appliance Repairs Ltd | Nottingham | 2024 |
| Asap Computer Services Limited | Berkshire | 1989 |
| Asap Domestic Repairs Ltd | Nottingham | 2025 |
| Asap Food Solutions Ltd | Cardiff | 2025 |
| Asap Steel Installations Ltd | Luton | 2024 |
| Asap Transport Service Limited | Bolton | 2018 |
| Asap Wales Services Limited | Cardiff | 2022 |
| Asas Group Limited | London | 2016 |
| Asav Fitness Ltd | Birkenhead | 2019 |
| Asaysi Limited | Cardiff | 2019 |
| Asaza Ltd | London | 2018 |
| ASB (Services) Limited | Wolverhampton | 2013 |
| ASB Events Ltd | Milton Keynes | 2024 |
| ASB Shiny Hand Car Wash Ltd | Sudbury | 2024 |
| ASB Wedding Services Ltd | Birmingham | 2020 |
| Asbakka Ltd | London | 2023 |
| Asbar Holdings Limited | Shirley | 2025 |
| Asbaud Ltd | Manchester | 2023 |
| Asbelo Ltd | London | 2025 |
| Asbestos and Environmental Safety Association Ltd | Sherfield English | 2023 |
| Asbestos Building Surveys Limited | Hamilton | 1999 |
| Asbestos GRP Labs Ltd | Mansfield | 2018 |
| Asbestos Management Institute Limited | Burton Upon Trent | 2013 |
| Asbestos Management Services Group Ltd | Billericay | 2022 |
| Asbestos Related Conditions-Allied Industrial Diseases | Dudley | 2014 |
| Asbestos Removal Contractors Association | Burton-On-Trent | 1985 |
| Asbol Ltd | London | 1995 |
| Asbrown Consulting Limited | Bristol | 2011 |
| Asbury Limited | Killingworth | 2010 |
| Asby Limited | Salford | 2025 |
| ASC Cirencester Ltd | Cirencester | 2020 |
| ASC Contracting & Building Ltd | Belvedere | 2015 |
| ASC Hair Limited | Mansfield | 2021 |
| ASC Media Limited | London | 2018 |
| ASC Pharma Limited | Rochester | 2024 |