| Barkat Foodstore Preston Ltd | Wholesale & retail | 2012 |
| Barker Home and Floor Limited | Construction | 2025 |
| Barker Property Services Ltd | Real estate | 2024 |
| Barket ALI and Sons Ltd | Wholesale & retail | 2026 |
| Barkingham Palace Limited | Hospitality | 2023 |
| Barkstone Limited | Other services | 2004 |
| Barktastic Treats Ltd | Wholesale & retail | 2024 |
| Barlick Limited | Transport & logistics | 2014 |
| Barlow Boarding Kennels Ltd | Other services | 2022 |
| Barlow Harry Logistics Ltd | Transport & logistics | 2025 |
| Barmasters Ltd. | Hospitality | 2024 |
| Barmet Collective Ltd | Manufacturing | 2025 |
| Barn Croft (Hoghton) Management Company Limited | Households | 2022 |
| Barn OWL Produce Limited | Administrative & support | 2013 |
| Barnacle Bill's Freckleton Limited | Hospitality | 2013 |
| Barnells Mortgage Consultants Limited | Financial services | 2006 |
| Barnes Safety & Associates Ltd | Professional & scientific | 2026 |
| Barnes Structural Ltd | Construction | 2019 |
| Barnes Wearden Performing Arts Education LLP | | 2023 |
| Barnett Security Holdings Limited | Financial services | 2025 |
| Barnfield Kennels Limited | Administrative & support | 2018 |
| Barnholme Joinery Limited | Construction | 2002 |
| Barnswick Catering Limited | Hospitality | 2021 |
| Baroque Rocks Ltd | Administrative & support | 2016 |
| Barr Consultancy Services Limited | Professional & scientific | 2024 |
| Barr Property Services Ltd | Wholesale & retail | 2018 |
| Barratt Lettings Limited | Real estate | 2013 |
| Barratt Roofing (Preston) Ltd | Construction | 2011 |
| Barrel & Bean Co Ltd | Hospitality | 2018 |
| Barrgorm Limited | Information & communication | 2025 |
| Barrica Wines Limited | Wholesale & retail | 2016 |
| Barrington Landscape Company Limited | Administrative & support | 2002 |
| Barrington Landscapes Ltd | Administrative & support | 2004 |
| Barrington-Hook Limited | Health & social care | 2011 |
| Barrisle Care Home Limited | Health & social care | 2002 |
| Barritt Associates Limited | Wholesale & retail | 1984 |
| Barron Wood Distribution Group Limited | Financial services | 2023 |
| Barron Wood Distribution Limited | Transport & logistics | 1993 |
| Barrow Andy Planning Ltd | Professional & scientific | 2011 |
| Barrow Financial Services Ltd | Professional & scientific | 2017 |
| Barrowcliff Plumbing & Heating Ltd | Construction | 2024 |
| Barry Allcock Haulage Limited | Transport & logistics | 2002 |
| Barsoom Limited | Professional & scientific | 2026 |
| Bartle Infrastructure Limited | Construction | 2025 |
| Barton Bangla Brasserie Limited | Hospitality | 2006 |
| Barton Ginger Enterprises Limited | Real estate | 2003 |
| Barton Grange Garden Centre Limited | Extraterritorial | 1974 |
| Barton Grange Holdings Limited | Financial services | 2025 |
| Barton Pre-School Nursery | Education | 2008 |
| Barton Tech Services Ltd | Construction | 2021 |
| Barton Virtual Finance Limited | Professional & scientific | 2020 |
| Barwell Estates Ltd | Real estate | 2020 |
| Barznji Ltd | Administrative & support | 2025 |
| BAS 4 U Ltd | Financial services | 2021 |
| BAS10 Limited | Construction | 2025 |
| Base Metalwork Limited | Manufacturing | 2008 |
| Base Properties and Developers Limited | Construction | 2023 |
| Base Systems Limited | Wholesale & retail | 1986 |
| Basement 4 U Limited | Manufacturing | 2020 |
| Basement Bargains Ltd | Wholesale & retail | 2023 |
| Bash Products Ltd | Wholesale & retail | 2025 |
| Bash Street Developments Ltd | Financial services | 2022 |
| Bashnutrition Ltd | Hospitality | 2017 |
| Basildon Larger Parade Limited | Administrative & support | 2017 |
| Basildon Parade Limited | Administrative & support | 2017 |
| Bassam Shawl Manufacturing Co. Limited | Extraterritorial | 1996 |
| Batan Consultancy Ltd | Information & communication | 2025 |
| Bateman Thermotooling Limited | Manufacturing | 2007 |
| Bates' Bespoke Ltd | Manufacturing | 2023 |
| Bath Gastrocare Ltd | Health & social care | 2015 |
| Bathroom Bliss Limited | Other services | 2021 |
| Bathroom Design & Supply Limited | Construction | 2003 |
| Batish Holdings Limited | Real estate | 2014 |
| Battersby Plant Ltd | Administrative & support | 2015 |
| Battersby Properties Ltd | Administrative & support | 2017 |
| BATTERYONLINE247 Ltd | Wholesale & retail | 2024 |
| Bawla Properties Ltd | Real estate | 2022 |
| BAX Engineering Limited | Professional & scientific | 2016 |
| Bay Horse Lane (Management Company) Limited | Households | 2022 |
| Bayani Finance Limited | Extraterritorial | 2021 |
| Bayanihan Finance LP | | 2018 |
| Baybutt Holdings Limited | Agriculture & fishing | 2011 |
| Baybutt Investments Limited | Financial services | 2016 |
| Baylton Court (Catterall) RTM Company Limited | Real estate | 2016 |
| Bayside Cyber Consulting Limited | Information & communication | 2015 |
| Bazza Courier Limited | Transport & logistics | 2018 |
| BB Beverage Group Ltd | Hospitality | 2022 |
| BB Drylining Ltd | Construction | 2011 |
| BB Legal Limited | Professional & scientific | 2010 |
| BB Media Ltd | Information & communication | 2024 |
| BBB Cars Ltd | Wholesale & retail | 2017 |
| BBE Developments Ltd | Real estate | 2006 |
| Bbjjd Ltd | Hospitality | 2025 |
| BBL Rental Limited | Real estate | 2021 |
| BBN Leisure Limited | Arts & recreation | 2025 |
| BC Double Glazing Solutions Ltd | Construction | 2021 |
| BC Marketing Consultants Limited | Professional & scientific | 2020 |
| BCC Heavy Plant Services Limited | Administrative & support | 2012 |
| BCS Estates Ltd | Financial services | 2013 |
| BCS Properties (NW) Limited | Real estate | 2022 |