| Atkinson House Management Company (Worthing) Limited | Real estate | 2015 |
| ATLAS27 Ltd | Other services | 2026 |
| Atronic Electromagnetic Shield Ltd | Construction | 2019 |
| Attuni Limited | Health & social care | 2018 |
| Atypon Systems Limited | Administrative & support | 2016 |
| Augustine Harmony Limited | Professional & scientific | 2026 |
| Aura Renovations Sussex Limited | Construction | 2023 |
| Autocar Valet Limited | Other services | 2021 |
| Autofix Mobile Ltd | Wholesale & retail | 2025 |
| Automotive Smart Repair Chichester Ltd | Wholesale & retail | 2016 |
| Autosolution Ltd | Wholesale & retail | 2007 |
| Autumn Lodge Ltd | Hospitality | 2008 |
| AVA Lettings Ltd | Administrative & support | 2010 |
| AVD 2020 Limited | Transport & logistics | 2020 |
| Aventus Recruitment Solutions Ltd | Administrative & support | 2024 |
| Avid Clinic Limited | Health & social care | 2020 |
| Avisford Mews Ltd | Construction | 2025 |
| AW (Residential) Surveying Limited | Professional & scientific | 2022 |
| AW Drive Ltd | Transport & logistics | 2019 |
| AXD Clothing Ltd | Wholesale & retail | 2025 |
| Axel Protection Ltd | Administrative & support | 2019 |
| Ayat Muskan Ltd | Hospitality | 2023 |
| Ayres Holdings Limited | Financial services | 2023 |
| Ayurveda CHI Limited | Information & communication | 2024 |
| B a L 27716 Ltd | Real estate | 2023 |
| B C Carpet Cleaning Ltd | Administrative & support | 2024 |
| B C Rigging & Construction Limited | Professional & scientific | 2015 |
| B K Nash Properties Ltd | Real estate | 2025 |
| B Nicholson Properties Ltd | Construction | 2024 |
| B Nutrition Limited | Health & social care | 2016 |
| B Prints Limited | Wholesale & retail | 2018 |
| B Squared Consulting Ltd | Construction | 2022 |
| B T Recovery Ltd | Transport & logistics | 2019 |
| B. Cooper Electrical Contractors Ltd | Construction | 2022 |
| Bachor Construction Limited | Construction | 2017 |
| BAD Wabbit Crew Ltd | Other services | 2026 |
| Bahar Foods Bognor Ltd | Wholesale & retail | 2025 |
| Bahar Valeting Ltd | Administrative & support | 2025 |
| Baitang Limited | Households | 2022 |
| Balcombe Care Homes Limited | Health & social care | 1985 |
| Baldwins Nursery Ltd | Agriculture & fishing | 2012 |
| Baltic Wharf (Littlehampton) Management Limited | Households | 2005 |
| Bambi Faith Ltd | Professional & scientific | 2025 |
| Bankside Coffee Ltd | Hospitality | 2024 |
| Barfoot Energy Ltd | Energy | 2008 |
| Barfoot Farms Limited | Agriculture & fishing | 2001 |
| Barfoot Holdings Limited | Extraterritorial | 2001 |
| Barfoots Management Limited | Other services | 2017 |
| Barfoots of Botley Limited | Wholesale & retail | 1989 |
| Barklye House Flats (Management) Limited | Households | 1991 |
| Barleys Limited | Extraterritorial | 2013 |
| Barmet (Industrial Services) Limited | Construction | 1976 |
| Barnham Optical Ltd | Health & social care | 2012 |
| Barnham Trade Windows Limited | Construction | 2024 |
| Barnham Trading Post Ltd. | Wholesale & retail | 1997 |
| Barnham Windows & Conservatories Limited | Construction | 2015 |
| Baronmead International Limited | Manufacturing | 1982 |
| Barton Tors Stores Limited | Wholesale & retail | 2003 |
| Batchelor of Art Ltd | Wholesale & retail | 2009 |
| Bathrooms of Hampshire Limited | Construction | 2024 |
| Battle Bounce Bass Limited | Manufacturing | 2023 |
| Bay Court Limited | Households | 1989 |
| Bayliss Group PTY Ltd | Wholesale & retail | 2024 |
| Bayside Architectural Design Limited | Professional & scientific | 2012 |
| Bayside Property Limited | Construction | 2020 |
| Baywin Business Supplies Limited | Administrative & support | 2013 |
| BCL Property Management UK Limited | Households | 2013 |
| BD Electrical Solutions Ltd | Construction | 2022 |
| BD Four Catering Ltd | Hospitality | 2025 |
| BE Salon Ltd | Other services | 2025 |
| Beacon (ST. Andrews) Management Company Limited | Households | 1982 |
| BEANY2019AGENCY Limited | Information & communication | 2024 |
| Bear Engineering Solutions Ltd | Professional & scientific | 2024 |
| Bearbells Ltd | Wholesale & retail | 2025 |
| Beaurivage Management Limited | Households | 1989 |
| Bebe Clas Limited | Hospitality | 2025 |
| Beckett Park Management (NO.2) Limited | Real estate | 1994 |
| Beckett Park Management Limited | Real estate | 1990 |
| Becky Louise Designs Ltd | Wholesale & retail | 2023 |
| Belimted Ltd | Wholesale & retail | 2026 |
| Bellingham House (Management) Limited | Real estate | 2003 |
| Bellwald Properties Limited | Construction | 2003 |
| Belmont Grey Ltd | Professional & scientific | 2019 |
| Benchmark Strength Ltd | Information & communication | 2023 |
| Bengcbacon Limited | Manufacturing | 2021 |
| Bennettcomposites Ltd | Professional & scientific | 2023 |
| Bennetts Removals and Deliveries South Ltd | Transport & logistics | 2015 |
| Bennetts Removals and Storage Ltd | Transport & logistics | 2025 |
| Bentridge Early Years Ltd | Health & social care | 2026 |
| Bergmann Engineering & Electricals Limited | Construction | 2026 |
| Berkeley Court Management (Bognor Regis) Limited | Households | 1984 |
| Bernhardt Associates LLP | | 2008 |
| Berry Blast Ltd | Wholesale & retail | 2026 |
| Berry Mito Limited | Hospitality | 2016 |
| Bersted Autos Ltd | Wholesale & retail | 2015 |
| Bessol Ltd | Manufacturing | 2020 |
| Best Bulgarian Shop Ltd | Wholesale & retail | 2022 |
| Best Buys Best Sales Ltd | Wholesale & retail | 2022 |
| Best Life Financial Planning Ltd | Financial services | 2018 |
| Best of M.E.K Limited | Wholesale & retail | 2024 |