| Bcrs Transport Ltd | Transport & logistics | 2026 |
| BCS Products Limited | Construction | 2001 |
| BDK Leisure Limited | Arts & recreation | 1995 |
| BDM Motors Ltd | Wholesale & retail | 2026 |
| BDV Limited | Other services | 2008 |
| BDV Manpower Ltd | Other services | 2018 |
| BDV Recovery Limited | Other services | 2008 |
| BDV Recovery Services Ltd | Other services | 2018 |
| BE Inspired Chairs Ltd | Administrative & support | 2022 |
| Beatrice & Anastasia Trans Ltd | Transport & logistics | 2025 |
| Beauthetic Group Ltd | Health & social care | 2023 |
| Beavers Commercial Limited | Administrative & support | 2014 |
| Bebe's (Ashby) Limited | Hospitality | 2024 |
| Beckwood Onsite Services Ltd | Manufacturing | 2019 |
| Bedrock Products Ltd | Wholesale & retail | 2021 |
| Bee-Spark Ltd | Construction | 2021 |
| Beldenn Inns Limited | Administrative & support | 2002 |
| Belgrave Lighting & Gifts Limited | Wholesale & retail | 2017 |
| Bella Properties Sales & Lettings Ltd | Households | 2018 |
| Bellalottie Fetch Limited | Wholesale & retail | 2021 |
| Bella’S Little Deli Ltd | Hospitality | 2026 |
| Bellingwood Properties Limited | Real estate | 2023 |
| Bellisimo's Riddings Ltd | Hospitality | 2019 |
| Belmont Property Company Limited | Real estate | 1996 |
| Belton & Sandtoft Community Christmas Lights CIC | Arts & recreation | 2025 |
| Belvilla Properties Ltd | Real estate | 2019 |
| BEN Powell Engineering Services Limited | Professional & scientific | 2018 |
| BEN Spiegelberg Limited | Health & social care | 2019 |
| Benchmark Hygiene Ltd | Professional & scientific | 2006 |
| Bengal Painting Ltd | Construction | 2025 |
| Bengal Village Restaurant Limited | Hospitality | 2017 |
| Beni Cool MAN Ltd | Manufacturing | 2009 |
| Beniamin Transport Limited | Transport & logistics | 2025 |
| Benji's Bodyshop Ltd | Wholesale & retail | 2020 |
| Benmar Property Group Limited | Real estate | 2020 |
| Benmar Property Solutions Ltd | Real estate | 2026 |
| Bentleysgarage Ltd | Manufacturing | 2012 |
| Berryblack Limited | Real estate | 2017 |
| Bespoke Blinds (Lincolnshire) Ltd | Wholesale & retail | 2018 |
| Bespoke Care Training Ltd | Health & social care | 2024 |
| Bespoke Deal Packaging by Yasmin Ltd | Real estate | 2025 |
| Bespoke H&S Solutions Ltd | Professional & scientific | 2019 |
| Best CUT Barbers (Scunthorpe) Ltd | Other services | 2023 |
| Best Hepworth LLP | | 2017 |
| Best Hepworth Services Ltd | Construction | 2013 |
| Best Shiny Bricks Ltd | Wholesale & retail | 2026 |
| Bethan Taylor Beauty Limited | Other services | 2026 |
| Betykevin Ltd | Wholesale & retail | 2025 |
| Beulah Brands Ltd | Manufacturing | 2024 |
| Beveridge & Bowman Limited | Wholesale & retail | 2018 |
| BG Diagnostics Ltd | Health & social care | 2026 |
| BH Petrochemical Services Ltd | Professional & scientific | 2022 |
| Bhullar Investments Limited | Real estate | 2003 |
| Biadi 0605 Ltd | Transport & logistics | 2020 |
| Bianca Beniamin Ltd | Transport & logistics | 2017 |
| Biatherm Ltd | Construction | 2023 |
| BIGDEALS4U Ltd | Wholesale & retail | 2025 |
| Bilal Chillies Ltd | Wholesale & retail | 2022 |
| Billy Mcvicar Safety Solutions Limited | Professional & scientific | 2014 |
| Binared Ltd | Information & communication | 2018 |
| Binda Sahota Construction Ltd | Construction | 2018 |
| Birchwood Radiology Limited | Health & social care | 2026 |
| Bird in the Barley Limited | Hospitality | 2003 |
| Birkrigg Ltd | Health & social care | 2020 |
| BJD Recovery Solutions Ltd | Transport & logistics | 2026 |
| Bjta Ltd | Wholesale & retail | 2026 |
| BK Coaching Ltd | Education | 2026 |
| BKS Confined Space Services Limited | Construction | 2025 |
| BL Electrical Services Limited | Construction | 2011 |
| Black & White Motors Ltd | Wholesale & retail | 2019 |
| Black Label Fragrances Ltd | Wholesale & retail | 2024 |
| Black Tongue Events Ltd | Arts & recreation | 2025 |
| Blackburn Advisory Ltd | Professional & scientific | 2026 |
| Blackheath Medical Services Ltd | Information & communication | 2017 |
| Blackheath Property Services Limited | Real estate | 2022 |
| Blackstone GAS Limited | Construction | 2023 |
| Blackthorn Media Ltd | Professional & scientific | 2024 |
| Blanshard Building Services Limited | Construction | 2015 |
| Blaxiom Limited | Information & communication | 2015 |
| BLD Projects Limited | Construction | 2010 |
| Bldv Ltd | Wholesale & retail | 2020 |
| Bleu Oak Construction Ltd | Construction | 2025 |
| Bleu Oak Property Ltd | Real estate | 2025 |
| Blinksbarbie Limited | Other services | 2024 |
| Bliss Beauty (Scunthorpe) Limited | Other services | 2017 |
| Blood Sweat & Muscle Ltd | Arts & recreation | 2017 |
| Blue Lagoon Limited | Health & social care | 2013 |
| Blue OWL Operations Limited | Information & communication | 2025 |
| Blue Water UK Group Ltd | Wholesale & retail | 2026 |
| Blueberry BOO Limited | Wholesale & retail | 2020 |
| Blueview Residential Limited | Real estate | 2026 |
| Blythe Developments Ltd | Construction | 2025 |
| Blythstone Ltd | Health & social care | 2025 |
| Blyton Dental Surgery Limited | Health & social care | 2015 |
| BMB Professional Ltd | Health & social care | 2020 |
| BMF Speedy Ltd | Transport & logistics | 2019 |
| BMJ E-Commerce Ltd | Wholesale & retail | 2025 |
| BMS Direct 2U Ltd | Wholesale & retail | 2017 |
| Boage Ltd | Wholesale & retail | 2008 |
| Boath Cladding Scunthorpe Limited | Construction | 2022 |