| Batton Flooring Ltd. | Construction | 2019 |
| Baturlabs Ltd | Information & communication | 2026 |
| Baucent Solutions Ltd | Other services | 2023 |
| Bauleiter Ltd. | Construction | 2017 |
| Baxter & Baye Associates Limited | Professional & scientific | 2003 |
| Baxter Baye Limited | Wholesale & retail | 1999 |
| Bay and Boat Pubs Ltd | Hospitality | 2025 |
| Bayside Ventures Limited | Hospitality | 2025 |
| BBH Estates Ltd | Real estate | 2024 |
| BBH Investments Ltd | Real estate | 2019 |
| BBS Contracts Ltd | Information & communication | 2023 |
| Bcae Architects Ltd | Professional & scientific | 2022 |
| BCC Plumbing and Heating Ltd | Construction | 2014 |
| Bdic Sealants Ltd | Construction | 2023 |
| BDJ Properties (Loch Lomond) Limited | Real estate | 2025 |
| BDS Commercials Ltd | Wholesale & retail | 2018 |
| BDY Event Planners Ltd | Administrative & support | 2024 |
| BE Safe First Ltd | Administrative & support | 2019 |
| Beacon Computing Solutions Limited | Information & communication | 2012 |
| Beacon Parking Services Ltd | Administrative & support | 2014 |
| Beanland Financial Services Limited | Extraterritorial | 2008 |
| Bear & Peach Ltd | Wholesale & retail | 2022 |
| Beattie Consulting Limited | Information & communication | 2006 |
| Beautiful Thinking Group Limited | Construction | 2025 |
| Beautify Spa & Wellness Ltd | Other services | 2024 |
| Beauty Select Limited | Wholesale & retail | 2006 |
| Beauty Without Vanity Ltd | Other services | 2020 |
| Beautylicious Boutique Aesthetics & Cosmetics Limited | Other services | 2020 |
| Bebo and Co Ltd | Health & social care | 2011 |
| Beckhouse Media Limited | Information & communication | 2000 |
| Bedrock Landscapes Limited | Administrative & support | 2007 |
| Bedroom and Kitchen Environments Ltd | Manufacturing | 2019 |
| Bedworth Taxis Ltd | Transport & logistics | 2010 |
| BEE Care Group Ltd | Health & social care | 2024 |
| BEE Fold Developments Limited | Construction | 2002 |
| BEE Fold Management Company Limited | Real estate | 2007 |
| BEE52 Limited | Wholesale & retail | 2025 |
| Beeboss Limited | Wholesale & retail | 2020 |
| Beech Rock Films Limited | Information & communication | 2014 |
| Beechdene Care Home Ltd | Health & social care | 2022 |
| Beechmount Dental Care Limited | Health & social care | 2024 |
| Beespoke Landscapes Ltd | Professional & scientific | 2026 |
| BEH Learning Ltd | Education | 2020 |
| Beholden Ltd | Arts & recreation | 2022 |
| Beijing House Gold Dragon Ltd | Hospitality | 2017 |
| Beirut Lounge Newcastle Ltd | Hospitality | 2018 |
| Belec Utility Engineering Ltd | Construction | 2026 |
| Belisama's Retreat CIC | Other services | 2018 |
| Bella Newco Limited | Real estate | 2025 |
| Belleame Lancaster Limited | Other services | 2021 |
| Bellflower Machinery Limited | Administrative & support | 2025 |
| Bells Industrial Supplies Limited | Wholesale & retail | 2015 |
| Bellwether Advisory Limited | Professional & scientific | 2026 |
| Belper Independent Financial Solutions Limited | Financial services | 2012 |
| Belvedere Construction Limited | Construction | 2006 |
| BEN Davies Advisory Ltd | Professional & scientific | 2025 |
| BEN Ford Talent Ltd | Administrative & support | 2024 |
| BEN Hopkins Boxing Ltd | Professional & scientific | 2025 |
| BEN Rose Estate Agents (Bamber Bridge) Limited | Real estate | 2022 |
| BEN Rose Estate Agents (Head Office) Ltd | Real estate | 2021 |
| BEN Rose Estate Agents (Leyland) Limited | Real estate | 2017 |
| BEN Rose Estate Agents (Longton) Limited | Real estate | 2023 |
| BEN Rose Estate Agents Ltd | Real estate | 2012 |
| BEN Transport Marine Services Limited | Transport & logistics | 2010 |
| Ben's Brewery Ltd | Manufacturing | 2021 |
| Benbulance Limited | Health & social care | 2023 |
| Benchmark FM Advisory Limited | Professional & scientific | 2026 |
| Benchwood Design Ltd | Professional & scientific | 2018 |
| Benjamin Raymond Limited | Professional & scientific | 2019 |
| Benllech DIY Ltd | Wholesale & retail | 2018 |
| Bens TAP Ltd | Hospitality | 2025 |
| Bentham Exterior Cleaning Ltd | Administrative & support | 2024 |
| Berket Ltd | Hospitality | 2021 |
| Berkshire Analytics Ltd | Professional & scientific | 2017 |
| Berry and Clarkson Ltd | Construction | 2018 |
| Berry Brothers Limited | Construction | 2017 |
| Berry Mortgage Solutions Limited | Extraterritorial | 2014 |
| Bespoke Composite Designs Limited | Manufacturing | 2023 |
| Bespoke Designs Lancashire Limited | Construction | 2023 |
| Bespoke Digital Agency Ltd | Information & communication | 2001 |
| Bespoke Group NW Ltd | Construction | 2025 |
| Bespoke Kitchen Makeovers Limited | Construction | 2024 |
| Bespoke Specialist Care Ltd | Health & social care | 2024 |
| Best Lives Limited | Health & social care | 2014 |
| Best One-Akhtars Limited | Wholesale & retail | 2012 |
| BEST4HEDGING Limited | Administrative & support | 2009 |
| Bethel General Services Ltd | Administrative & support | 2026 |
| Better Weatherboards Ltd | Construction | 2016 |
| Betterplan Design Limited | Professional & scientific | 2007 |
| Betty Fluffs Ltd | Hospitality | 2023 |
| Betty's Event Structures Ltd | Hospitality | 2025 |
| Bevers Property Management Ltd | Real estate | 2006 |
| BEY Otgen Catering Ltd | Hospitality | 2021 |
| Beyond ARC Ltd | Financial services | 2025 |
| Beyond Pilates Ltd | Arts & recreation | 2026 |
| Beyond Reach Accommodation Ltd | Real estate | 2022 |
| Beyond the Download Ltd | Wholesale & retail | 2018 |
| Beyond Words Collective CIC | Health & social care | 2026 |
| BG Commercial Properties Ltd | Real estate | 2021 |
| BGD Investments Limited | Financial services | 2024 |