| AZD Ltd. | London | 2024 |
| AZE Management Limited | Edinburgh | 2012 |
| Azentro Limited | London | 2026 |
| Azepam Trade Limited | Manchester | 2020 |
| Azienda International Limited | Hampshire | 1997 |
| Azimex Investments Limited | Northampton | 2003 |
| Azire Limited | Manchester | 2015 |
| Azixs Limited | London | 2013 |
| Aziz Group Limited | London | 2008 |
| AZJ Agricultural Chymistry (France) Ltd | Cardiff | 2019 |
| Azjem Ltd | Hampton | 2018 |
| AZM Properties Group Limited | Bristol | 2024 |
| AZM Property Group Limited | Bristol | 2025 |
| AZM Property Investments Limited | Bristol | 2024 |
| AZM Property Management Limited | Bristol | 2021 |
| AZM Property Services Limited | Bristol | 2024 |
| Azmart Limited | Bury | 2020 |
| AZN Co., Ltd | Stafford | 2022 |
| Azoodos Blue Limited | Milton Keynes | 2017 |
| AZR Consulting Services Limited | Coulsdon | 2022 |
| AZR Financial Services Ltd | Telford | 2021 |
| Azrem Ltd | London | 2026 |
| Aztec Electronics Limited | Horsham | 2024 |
| Aztec Engineering UK Limited | Twickenham | 2000 |
| Aztec Gold Financial Services Ltd | Aylesbury | 2012 |
| Aztec Lifestyle Ltd | Waterlooville | 2025 |
| Aztechy Power Technology Co., Ltd | Beckenham | 2015 |
| Aztek 1994 Limited | Colchester | 2012 |
| Aztek Self Storage Ltd | Letchworth Garden City | 2012 |
| Azucu Limited | Worthing | 2009 |
| Azur Holdings Limited | London | 2019 |
| Azur International Limited | London | 2018 |
| Azur Productions Limited | Hereford | 2007 |
| Azura Business Solutions Limited | Macclesfield | 2004 |
| Azura Design Studio Limited | Macclesfield | 2004 |
| Azura Hospitality Group Ltd | Blackpool | 2022 |
| Azure Hygiene Limited | Liskeard | 2019 |
| Azure Investments International Limited | London | 2018 |
| Azure Lagoon Support Network Ltd | Manchester | 2026 |
| Azurespan Technologies Ltd | London | 2025 |
| Azurr Ltd | London | 2022 |
| Azuvu Limited | Worthing | 2012 |
| Azzuro Yacht Ltd | London | 2025 |
| Azzurro 58 Ltd | Darlington | 2012 |
| Azzurro Import and Export Co., Ltd | London | 2024 |
| B & a Property Holdings Limited | London | 2022 |
| B & B Funeral Directors Limited | Sutton Coldfield | 2002 |
| B & B Norway Limited | London | 2009 |
| B & C E Financial Services Limited | Crawley | 2016 |
| B & C Travel Limited | Winscombe | 2024 |
| B & D Cleaning Limited | Woodford Green | 2016 |
| B & D Manufacturing Limited | Aldershot | 1988 |
| B & D Tyres Limited | Aldridge | 2021 |
| B & D Wholesale Limited | Canvey Island | 2024 |
| B & F (South West) Ltd | Bristol | 2010 |
| B & F Consulting Ltd | Southall | 2021 |
| B & F Global Ltd | Belfast | 2026 |
| B & J Marshall Limited | Milton Keynes | 2018 |
| B & J Partners Limited | Lancaster | 1999 |
| B & K Eiendom Limited | Pencoed, Bridgend | 2007 |
| B & K Ventures Limited | Stoke On Trent | 2014 |
| B & L Rylott Limited | Boston | 2008 |
| B & M Keshwala Properties Ltd | Stockport | 2012 |
| B & M Supermarket Limited | London | 2017 |
| B & M Tyres & Exhausts Limited | Mansfield | 2002 |
| B & P Holdings Ltd | London | 2017 |
| B & P Insulation Ltd | Prescot | 2018 |
| B & R Bakery & Restaurant Halal Ltd. | Edgware | 2013 |
| B & R Carpet Co Ltd | London | 2007 |
| B & S Estates Limited | London | 2017 |
| B & S Global Energy Ltd. | London | 2013 |
| B & S Import & Export Limited | Spilsby | 2014 |
| B & S Transport Limited | Appleby | 2012 |
| B & W Asset Management Limited | Oldham | 2007 |
| B 2 Business Systems Limited | Uxbridge | 2003 |
| B a Outsourcing Limited | Northampton | 2011 |
| B B Music Tuition Limited | Nottingham | 1996 |
| B Beautiful Training Academy Limited | Selby | 2018 |
| B Braun Healthcare Limited | Sheffield | 1989 |
| B C Skips Limited | Gloucestershire | 2004 |
| B Company (Northern) Limited | Stockton-On-Tees | 2020 |
| B D I Property Services Limited | Derby | 1999 |
| B D P Planning Limited | Manchester | 1987 |
| B D P Project Management Limited | Manchester | 1981 |
| B D R Associates Limited | 2 Kings Road Haslemere | 1994 |
| B Eiendom Invest Limited | Pencoed, Bridgend | 2007 |
| B F Aeolian Ltd | Burra | 2013 |
| B F Aromatherapy Limited | Melton Mowbray | 2012 |
| B G Land Limited | London | 2011 |
| B Green Ltd | Leicester | 2026 |
| B H Hotels 2 Ltd | Leeds | 2016 |
| B H Hotels 3 Ltd | Leeds | 2018 |
| B H P Security Systems Limited | Londonderry | 1998 |
| B Inspired Marketing Limited | St. Neots | 2016 |
| B J K Investments Limited | Wirral | 2007 |
| B J Myers Haulage Limited | Keston | 1976 |
| B J Watson (Funerals) Limited | Preston | 2000 |
| B Keogh Construction Limited | Ashford | 2014 |
| B Kosher Limited | London | 2016 |
| B Miller & Co Limited | Buckie | 2024 |