| Bambino Deli Ltd | Hospitality | 2021 |
| Bamboo Cafe Ltd | Hospitality | 2019 |
| Banc Property Group Limited | Real estate | 2016 |
| Bandhob Limited | Administrative & support | 2012 |
| Bar Analytics Limited | Information & communication | 2016 |
| Barabar Ltd | Professional & scientific | 2014 |
| Barbary Logistics Ltd | Transport & logistics | 2021 |
| Barbot Close (Block D) Management Company Limited | Households | 1992 |
| Barbot Close Developments Ltd | Construction | 2026 |
| Barclay Ballard Ltd | Manufacturing | 2021 |
| Bard Properties Limited | Households | 1996 |
| Bard Subsea Ltd | Professional & scientific | 2025 |
| Bardom Ltd | Wholesale & retail | 2025 |
| Bardome Limited | Wholesale & retail | 2013 |
| Barille Ltd | Financial services | 2023 |
| Barker & Steels Ltd | Professional & scientific | 2007 |
| Barksdale Stanfield Limited | Administrative & support | 2010 |
| Barnard Lodge (2011) Limited | Households | 2012 |
| Barnard Lodge (Management) Limited | Households | 1998 |
| Barnes Music Education Ltd | Education | 2024 |
| Barnet Auto Centre Limited | Wholesale & retail | 2019 |
| Barnet Auto Service Centre Ltd | Wholesale & retail | 2026 |
| Barnet Building Company Ltd | Construction | 2014 |
| Barnet Business Co Ltd | Wholesale & retail | 2018 |
| Barnet Car Services Ltd | Wholesale & retail | 2025 |
| Barnet Charcuterie Limited | Hospitality | 2023 |
| Barnet Chimney Sweeps Ltd | Administrative & support | 2021 |
| Barnet Churches Action | Health & social care | 2013 |
| Barnet Churchill Developers Ltd | Construction | 2023 |
| Barnet Community Pubs Ltd | Hospitality | 2026 |
| Barnet Curry Centre Ltd | Hospitality | 2025 |
| Barnet Dental Laboratory Ltd | Health & social care | 2020 |
| Barnet Development Limited | Professional & scientific | 2010 |
| Barnet Eruv Committee | Other services | 2013 |
| Barnet Evobuild Ltd | Construction | 2023 |
| Barnet EYE Care Limited | Professional & scientific | 2008 |
| Barnet Fish & Chips Limited | Hospitality | 2022 |
| Barnet Fish and Chips Shop Ltd | Hospitality | 2023 |
| Barnet Group Ltd. | Construction | 2016 |
| Barnet Joinery Ltd | Construction | 2026 |
| Barnet Kitchens Ltd. | Wholesale & retail | 2013 |
| Barnet Metal Fabrication Ltd | Wholesale & retail | 2021 |
| Barnet Motors Ltd. | Wholesale & retail | 2016 |
| Barnet Osteopaths Ltd | Health & social care | 2020 |
| Barnet Paws Limited | Other services | 2024 |
| Barnet Pizza Ltd | Hospitality | 2022 |
| Barnet Property Group Ltd | Real estate | 2023 |
| Barnet Spice Ltd | Hospitality | 2019 |
| Barnet Tavern Limited | Hospitality | 2015 |
| Barnet Vanz Ltd | Wholesale & retail | 2026 |
| Barnet Water Services Ltd | Construction | 2026 |
| Barnet Window Company Holding Ltd | Real estate | 2024 |
| Barnet Window Company Limited | Manufacturing | 1997 |
| Barnett Tavern Limited | Hospitality | 2015 |
| Barons Estates (Elstree) Limited | Real estate | 2004 |
| Baronsmere Court Barnet (Freehold) Limited | Households | 1981 |
| Baroudi Investments Ltd | Real estate | 2025 |
| Barradise Ltd | Construction | 2018 |
| Barrington Hotel London Limited | Hospitality | 2024 |
| Barritt Rentals Limited | Real estate | 2024 |
| Barry Flack & Co Limited | Professional & scientific | 2008 |
| Barserve Co Limited | Hospitality | 2015 |
| Barston Limited | Real estate | 2015 |
| Barzel Group Ltd | Real estate | 2023 |
| Basa Holdings Ltd | Real estate | 2023 |
| Bascroft Limited | Administrative & support | 2004 |
| Batchelor Technical Services Limited | Manufacturing | 2003 |
| Bates Alarms Limited | Administrative & support | 2013 |
| Bates Asset Management Ltd | Real estate | 2024 |
| Batforme.Com Limited | Information & communication | 2016 |
| Batten Events Ltd | Hospitality | 2025 |
| Battledore FM Limited | Extraterritorial | 2014 |
| BAU Development Ltd | Construction | 2025 |
| BAU Properties Ltd | Real estate | 2020 |
| BAW Property Agency Limited | Real estate | 2025 |
| BAW Stair Lifts Limited | Wholesale & retail | 2022 |
| Bay Capital Advisory Limited | Professional & scientific | 2023 |
| Bay City Hotels Management Limited | Hospitality | 2019 |
| Bayberry Consultancy Services Ltd | Professional & scientific | 2019 |
| Baymade Limited | Health & social care | 2007 |
| Baytime Limited | Information & communication | 2017 |
| Bazk Limited | Hospitality | 2023 |
| BB Funerals Limited | Other services | 2017 |
| BB Songs Ltd | Information & communication | 2021 |
| BBD Properties Ltd | Real estate | 2019 |
| BBK Finance & Commercial Limited | Administrative & support | 2003 |
| BBK Partnership (DI & Co) Limited | Professional & scientific | 2013 |
| BBK Partnership Ltd | Administrative & support | 2018 |
| BBK Registrars Limited | Administrative & support | 2020 |
| BBK Trade Finance Ltd | Administrative & support | 1994 |
| BBN Academy C.I.C. | Information & communication | 2018 |
| Bbsp Bathrooms Ltd | Construction | 2017 |
| BBX Goffs Oak Limited | Other services | 2026 |
| BC Links Ltd | Transport & logistics | 2012 |
| BCC Capital Limited | Real estate | 2017 |
| Bces ( UK ) Ltd | Education | 2019 |
| Bcrtalent Ltd | Information & communication | 2015 |
| BDM Transport Limited | Transport & logistics | 2018 |
| BDP Capital Limited | Wholesale & retail | 2020 |
| BE Bijou Limited | Wholesale & retail | 2017 |