| Batiste Properties and Development Limited | Duxford | 1964 |
| Batito Holdings Ltd | London | 2020 |
| Batmink Property Holdings Ltd | Bridgwater | 2025 |
| Batna Investments Ltd | London | 2018 |
| Baton Capital Ltd | London | 2025 |
| Batonuk Ltd | London | 2023 |
| Batouille Holdings Ltd | Worsley | 2025 |
| Batra Property Holdings Limited | Edinburgh | 2026 |
| Batrak Holdings Ltd | Warrington | 2024 |
| Batsch Properties Limited | Rochdale | 2017 |
| Batson and Webster,Limited | | 1920 |
| Batsrock Financial Ltd | Frome | 2019 |
| Batsrock Holdings Ltd | Frome | 2018 |
| Batt Holdings Limited | Ystrad Mynach | 2025 |
| Batt Park Holdings Limited | London | 2013 |
| Batt Properties Ltd | Southall | 2026 |
| Battaglia Holdings Limited | Huddersfield | 2022 |
| Battchella Limited | London | 2022 |
| Batter & Co Holdings Ltd | Enfield | 2026 |
| Battersea Care Home Holdings Limited | Egham | 2019 |
| Battersea Chimney Lift Ltd | London | 2021 |
| Battersea Holdco Ltd | Harrow | 2024 |
| Battersea Newco Limited | London | 2026 |
| Battersea Park Capital Ltd | London | 2021 |
| Battery Hill Capital Limited | London | 2022 |
| Battery Park Limited | London | 2015 |
| Battisson Holdings Limited | Burton-On-Trent | 2025 |
| Battle Group Holdings Limited | London | 2022 |
| Battle Hill Properties Limited | London | 2023 |
| Battle Resources UK Limited | Kingston Upon Thames | 2025 |
| Battleface Insurance Services Limited | Leicester | 2012 |
| Battlefield Real Estate Holdings Limited | Shrewsbury | 2022 |
| Battlers Investments Limited | St. Albans | 2019 |
| Battlestar Limited | Haslemere | 2022 |
| Battletown Renewable Energy Ltd | Newtownards | 2021 |
| Battrick Consulting Limited | Epsom | 2024 |
| Batur Holdings Limited | Bromley | 2025 |
| Batus Limited | London | 1982 |
| BAU UND Isolierung Ltd | London | 2022 |
| Bauco Ltd | London | 2023 |
| Baudelaire Holdings Ltd | London | 2023 |
| Bauer Asset Management Ltd | Woodhall Spa | 2023 |
| Bauer Assets Limited | Birkenhead | 2025 |
| Baufort Holdings Ltd | London | 2025 |
| Baugh Fell Holdings Ltd | Faringdon | 2024 |
| Baum Holdings Limited | Bury | 2021 |
| Baumore Holdings Ltd | London | 2019 |
| Baunton Holdings Limited | Dorset. | 1948 |
| Baupost Group Limited | Reading | 2011 |
| Baureis Limited | Bristol | 2024 |
| Baurencly Ltd | Norwich | 2025 |
| Bauromat Holdings Limited | Telford | 2015 |
| Bauvill Group Limited | Rochester | 2020 |
| Bauvill Investments Limited | Rochester | 2025 |
| Bauw Capital Ltd | Epsom | 2025 |
| Bavan Holdings Ltd | Co Down | 2026 |
| Bavaria Holdco Limited | London | 2025 |
| Bavaria Propco Security Limited | London | 2025 |
| Bavarian Holdings Ltd | Norwich | 2020 |
| Bavco Limited | Sevenoaks | 2000 |
| Bavex Holdings Limited | Woking | 2017 |
| Baviaan Holdings Limited | Malton | 2025 |
| Bavinton Financial Ltd | Shipley | 2005 |
| BAW Group Limited | London | 2023 |
| BAW Holdco Ltd | London | 2026 |
| Bawa Soft Limited | Stoke-On-Trent | 2022 |
| Bawcombe Limited | Okehampton | 2015 |
| Bawden Energy Limited | London | 2017 |
| Bawi Holdings Limited | Sutton Coldfield | 2022 |
| Bawlers Gate Holdings Ltd | Cullompton | 2025 |
| Bawn HQ Ltd | Leyland | 2024 |
| Bawnard Holdings Limited | Crawley | 2024 |
| Bawnbua Holdings Ltd | Lurgan | 2026 |
| Baws Holding Limited | Kingsclere | 2019 |
| Bawtry 2025 Ltd | Doncaster | 2025 |
| Bawtry Commercial Brokers Limited | Doncaster | 2024 |
| Bawtry Group Limited | Doncaster | 2024 |
| Bawtry Hall Granary 2 Ltd | Doncaster | 2024 |
| Bawtry Hall Granary 3 Limited | Doncaster | 2025 |
| Bawtry Holdings Ltd | Doncaster | 2017 |
| Bawtry Property Holdings Limited | London | 2020 |
| Bawtry Venue Ltd | Doncaster | 2024 |
| Bawtry Woodland Group Ltd | Doncaster | 2024 |
| Bawuah Estate Ltd | Hull | 2025 |
| BAX & Bay Ltd | Muir Of Ord | 2023 |
| Baxgul Limited | Dunmow | 2013 |
| Baxhp Holdings Ltd | Newton Abbot | 2023 |
| Baxies Investment Limited | Glasgow | 2018 |
| Baxma Capital Ltd | London | 2026 |
| Baxsocal Ltd | Glasgow | 2020 |
| Baxter & Beagle Holdings Limited | Sheffield | 2024 |
| Baxter Advice Services Ltd | Purley | 2011 |
| Baxter Financial Limited | Milton Keynes | 2018 |
| Baxter Financial Services Ltd | Waterlooville | 2018 |
| Baxter Grab & Tipper Hire Limited | Wigan | 2016 |
| Baxter Healthcare Pension Plan Trustees Limited | Croydon | 1960 |
| Baxter Holding Group Limited | Colchester | 2019 |
| Baxter Investments (Kent) Limited | Faversham | 2025 |
| Baxter Lloyd Developments Limited | Ilkeston | 2023 |
| Baxter Pearse Financial Consultants Limited | Gateshead | 2014 |