| Barrla Limited | Other services | 2022 |
| Barry Shaw & SON Building Ltd | Construction | 2013 |
| Barry Shaw Developments Limited | Construction | 2013 |
| Barsali Property Holdings Limited | Real estate | 2020 |
| Barwick Dental Laboratory Services Limited | Financial services | 2002 |
| BAS Young Massage & Spa Ltd | Other services | 2025 |
| Baseline Control Systems Limited | Information & communication | 2002 |
| Bashir Developments Ltd | Real estate | 2025 |
| Bashir Stores Limited | Wholesale & retail | 2026 |
| Basics Claims Limited | Financial services | 2000 |
| Baskudo Ltd | Wholesale & retail | 2024 |
| Bassous Ltd | Hospitality | 2019 |
| Basten Security Group Ltd | Administrative & support | 2025 |
| Bastille Security and Risk Management Ltd | Professional & scientific | 2023 |
| BAT Access Ltd | Construction | 2026 |
| BAT Productions Ltd | Hospitality | 2021 |
| Bathtastic Bubbles Ltd | Wholesale & retail | 2019 |
| Batool Properties Ltd | Real estate | 2025 |
| Batool Trades Ltd | Wholesale & retail | 2026 |
| Battersby Junction Community Association | Households | 2009 |
| Bault @ SOS Ltd | Manufacturing | 2020 |
| Bavg Ltd | Real estate | 2020 |
| Bavin Access Solutions Limited | Construction | 2012 |
| Baxcebeg Limited | Other services | 2019 |
| Bayaz Developments NE Ltd | Construction | 2022 |
| Bayley Security Limited | Administrative & support | 1991 |
| Baylo Lifting Ltd | Construction | 2025 |
| Baynax Tech Ltd | Administrative & support | 2023 |
| Bayview Blyth Limited | Construction | 2024 |
| BAZ Associates Ltd | Real estate | 2017 |
| Bazaar Food Hall Limited | Hospitality | 2022 |
| BB Alloys Ltd | Wholesale & retail | 2024 |
| BB Excel Services Ltd | Health & social care | 2018 |
| Bb-Engineering CONSULTANTS77 Ltd | Professional & scientific | 2022 |
| BBM Training & Development Solutions Ltd | Education | 2022 |
| Bcaccess Ltd | Construction | 2025 |
| Bcbgn Ltd | Construction | 2026 |
| Bcis International Ltd | Construction | 2025 |
| BCL Murray Ltd | Construction | 2026 |
| BCM Engineering Services Limited | Professional & scientific | 2015 |
| BD Boro Solutions Limited | Construction | 2025 |
| BD Joinery & Developments Ltd | Construction | 2026 |
| BDB Properties (NE) Ltd | Real estate | 2021 |
| BDE Cladding Limited | Construction | 2025 |
| BDF Energy Limited | Professional & scientific | 2024 |
| Bdoor Ltd | Real estate | 2020 |
| BDP Access Ltd | Construction | 2025 |
| BE IP Connected Limited | Information & communication | 2014 |
| BE Remarkable (MP) Limited | Professional & scientific | 2024 |
| Beach Access Ltd | Construction | 2025 |
| Beaconlink Wholesale Ltd | Wholesale & retail | 2025 |
| Beale Heating Services Ltd | Construction | 2024 |
| Beales Building Ltd | Other services | 2025 |
| Bearchaproducts Ltd | Wholesale & retail | 2024 |
| Beaumont Parmo House Ltd | Hospitality | 2025 |
| Beaumont Road Garage Limited | Wholesale & retail | 2014 |
| Beautiful Escapes Yorkshire Ltd | Hospitality | 2019 |
| Beautiful Furnishings Ltd | Wholesale & retail | 2023 |
| Beauty Clinic (NE) Limited | Other services | 2016 |
| Becketts of Saltburn Limited | Hospitality | 2026 |
| BED Bumpa Limited | Manufacturing | 2017 |
| Beddard Heating Services Ltd | Construction | 2024 |
| Bedford Bistro Limited | Other services | 2019 |
| Bedford Street Leisure Ltd | Hospitality | 2019 |
| Bednarski Logistics Limited | Transport & logistics | 2025 |
| Bedrock Consulting Ltd | Professional & scientific | 2024 |
| BEE Collections Limited | Wholesale & retail | 2025 |
| BEE QS Services Ltd | Professional & scientific | 2023 |
| Beechams Site Services Ltd | Professional & scientific | 2019 |
| Beechwood Community Hub CIC | Arts & recreation | 2013 |
| Beenergy Ltd | Construction | 2020 |
| Begin Focus Limited | Construction | 2024 |
| Behaviour Interactive UK Holding Limited | Information & communication | 2023 |
| Behaviour Interactive UK Limited | Information & communication | 2013 |
| Behavioural Safety Solutions Ltd | Administrative & support | 2024 |
| Being Polite Services Limited | Health & social care | 2015 |
| Belfour Properties Limited | Other services | 2010 |
| Belgravia Distribution Network Limited | Manufacturing | 2026 |
| Belgravia Grtm Limited | Households | 2019 |
| Bell CPP Ltd | Construction | 2023 |
| Bella Pizza Auckland Ltd | Hospitality | 2025 |
| Bellaine Limited | Real estate | 1980 |
| Belle and Bloom Ltd | Wholesale & retail | 2026 |
| Belle Financial Services Limited | Financial services | 2004 |
| Belle VUE Diner Ltd | Hospitality | 2020 |
| Belle VUE Fisheries Limited | Hospitality | 2020 |
| Belle VUE Stores North East Limited | Wholesale & retail | 2014 |
| Belles & Brides Ltd | Transport & logistics | 2023 |
| Bellevueapartuk Ltd | Hospitality | 2023 |
| Bellrose Limited | Hospitality | 2024 |
| Bellwether Consultancy Limited | Professional & scientific | 2015 |
| Belts, Conveyors & Accessories Ltd | Manufacturing | 2003 |
| Belvero Ltd | Wholesale & retail | 2026 |
| BEN & M Accountants Limited | Professional & scientific | 2026 |
| BEN Cross Property Ltd | Households | 2025 |
| BEN Jackson Properties Limited | Real estate | 2019 |
| BEN Mckenna Rigging & Access UK Ltd | Manufacturing | 2026 |
| BEN Peacock Ltd | Construction | 2018 |
| BEN Rankin Limited | Construction | 2025 |
| BEN the Plumber Ltd | Construction | 2022 |