| B12 Laboratory Solutions Limited | Professional & scientific | 2024 |
| Baarail Limited | Construction | 2016 |
| Babel Consulting Solutions Limited | Professional & scientific | 2022 |
| Baby Lady Limited | Wholesale & retail | 2006 |
| Back a Yard JA Group Limited | Hospitality | 2026 |
| Back to Health Osteopathy Ltd | Health & social care | 2021 |
| Backayard JA Ltd | Wholesale & retail | 2025 |
| Backsplash Limited | Financial services | 2016 |
| Badder Installations Ltd | Construction | 2023 |
| Bain Financial Ltd | Financial services | 2026 |
| Bainbridge Financial Planning Limited | Financial services | 2020 |
| Bake Mates Limited | Hospitality | 2017 |
| Balance Cosmetics Limited | Manufacturing | 2025 |
| Balcat Ltd | Construction | 2014 |
| Balio Software Limited | Information & communication | 2022 |
| Balkan Food G&G Limited | Wholesale & retail | 2023 |
| Ballerio Holdings Limited | Real estate | 2020 |
| Ballo Arthur Pita Ltd | Arts & recreation | 2009 |
| Balopo Ltd | Information & communication | 2018 |
| Baltic House Wine Bar Limited | Hospitality | 2022 |
| Balzano Import Ltd | Wholesale & retail | 2025 |
| Bamber Associates Limited | Financial services | 2009 |
| Bana Kent Ltd | Hospitality | 2025 |
| Banana Property (Margate) Limited | Households | 2021 |
| Bar FLY 85 Ltd | Hospitality | 2025 |
| Barakat Bazar Limited | Wholesale & retail | 2023 |
| Bargain Hunter Emporium Ltd | Wholesale & retail | 2024 |
| Bargain Hunteruk Ltd | Professional & scientific | 2019 |
| Barge Burger Limited | Hospitality | 2024 |
| Barham Court (Barham) Limited | Real estate | 1999 |
| Barham Lane Designs Ltd | Manufacturing | 2025 |
| Barham Vehicle Services Ltd | Wholesale & retail | 2022 |
| Barker HV & LV Services Ltd | Professional & scientific | 2026 |
| Barley Digital Limited | Administrative & support | 2025 |
| Barley Moon Limited | Real estate | 2005 |
| Baroque Designs UK Limited | Manufacturing | 2008 |
| Barreto-Smith Architects Limited | Professional & scientific | 2023 |
| Barretts of Canterbury Limited | Wholesale & retail | 1939 |
| Barretts Top Co Limited | Wholesale & retail | 2023 |
| Barrington Consulting Limited | Professional & scientific | 2023 |
| Barros Flow Ltd | Information & communication | 2026 |
| Barter Legal Services Ltd | Professional & scientific | 2022 |
| Barton Court Academy Trust | Education | 2011 |
| Barton Hodges Broadcast Ltd | Information & communication | 2021 |
| Barton Mill Canterbury Management Limited | Households | 2006 |
| Barwick Plant Holdings Limited | Construction | 2021 |
| Barwick Properties Limited | Construction | 2015 |
| Base Property Limited | Construction | 2017 |
| Bash Catering Ltd | Hospitality | 2019 |
| Basinghall Estate Company Limited | Real estate | 1928 |
| Bastion Software Limited | Information & communication | 2015 |
| BAT Trading Company Ltd | Administrative & support | 2024 |
| Bath Court (Folkestone) Limited | Extraterritorial | 1950 |
| Battle of Britain Tours Ltd | Administrative & support | 2021 |
| Battlescribe Limited | Information & communication | 2019 |
| Bay Demolition Limited | Construction | 2022 |
| Bay Fish Limited | Wholesale & retail | 2004 |
| Bay Fisheries Limited | Wholesale & retail | 2004 |
| Bay Tree Homes (Guildford) LLP | | 2024 |
| Bay Tree Homes Developments Ltd | Extraterritorial | 2015 |
| Bay Tree Homes Holdings Ltd | Construction | 1995 |
| Bay Tree Homes Investments Ltd | Real estate | 2014 |
| BB Nails & Spa Limited | Other services | 2021 |
| BBP Canterbury Ltd | Hospitality | 2025 |
| BBQ Tech Limited | Education | 2025 |
| BC Laker Limited | Financial services | 2022 |
| BCF Trading Ltd | Agriculture & fishing | 2022 |
| BD Transport Limited | Transport & logistics | 2023 |
| BDB Design LLP | | 2011 |
| BDM Palmer Limited Liability Partnership | | 2014 |
| BDS Transment Ltd | Construction | 2024 |
| Be-Wise GAS and Plumbing Services Ltd | Construction | 2017 |
| BE. Training LLP | | 2020 |
| Beachlands Court (Walmer) Residents Association Limited | Real estate | 2000 |
| Beadle-Brown Consulting Ltd | Professional & scientific | 2025 |
| Beady EYE Theatre | Arts & recreation | 2009 |
| Beantree Cottage Ltd | Wholesale & retail | 2013 |
| Bear Pause Ltd | Education | 2025 |
| Beardy Baker Ltd | Manufacturing | 2019 |
| Beasley Properties Limited | Administrative & support | 1998 |
| Beasteats Ltd | Wholesale & retail | 2018 |
| Beaty Property Services LLP | | 2022 |
| Beaumont Plumbing Solutions Ltd | Construction | 2020 |
| Beautifox Ltd | Hospitality | 2018 |
| Beautiful Bodies (Kent) Limited | Wholesale & retail | 2015 |
| Beauty Angels Store UK Ltd | Wholesale & retail | 2021 |
| Beauty Box Canterbury Ltd | Other services | 2023 |
| Beauty by Samii Ltd | Other services | 2024 |
| Beauty Kitchen Limited | Manufacturing | 2009 |
| Beauty Lounge Canterbury Ltd | Other services | 2026 |
| Bechange | Administrative & support | 2005 |
| Becket Holdings Ltd | Financial services | 2017 |
| Bedstone Limited | Health & social care | 2000 |
| Beercart Building Freehold Limited | Households | 2016 |
| Beerstecher Family Investment Company Ltd | Financial services | 2016 |
| Bekbuild Kent Limited | Construction | 2018 |
| Bekunet Ltd | Manufacturing | 2019 |
| Belgrade Medical Limited | Health & social care | 2010 |
| Belgrave Living Ltd | Health & social care | 2020 |
| Bella Luce Photography Ltd | Professional & scientific | 2018 |