| Arwyn Oak Artistry Ltd | Manufacturing | 2025 |
| Ascension Wise Group Limited | Real estate | 2026 |
| Ascension Wise Ltd | Households | 2024 |
| Ascent Rentals Ltd | Other services | 2019 |
| Asinurda Consult Limited | Administrative & support | 2024 |
| Assessment Solutions Risk Limited | Public administration | 2010 |
| Assigned Interpreting Ltd | Professional & scientific | 2023 |
| Astratelli Limited | Manufacturing | 2013 |
| AT Contracting Ltd | Agriculture & fishing | 2024 |
| Auto Republic Limited | Wholesale & retail | 2025 |
| Autochek UK Limited | Wholesale & retail | 2004 |
| AV8TOR UK Ltd | Wholesale & retail | 2014 |
| Avocet Consulting Limited | Professional & scientific | 2013 |
| Axia Development Limited | Professional & scientific | 2007 |
| Axis Financial Services Limited | Financial services | 2002 |
| Azure Aero Limited | Wholesale & retail | 2020 |
| B&T Building Services Ltd | Construction | 2019 |
| Badgers Field Limited | Households | 2004 |
| Badoobie Ltd | Information & communication | 2021 |
| Bags of Support UK Limited | Wholesale & retail | 2025 |
| Baldwin’S Pools Ltd | Construction | 2024 |
| Barn Church LLP | | 2021 |
| Bayleaf Consulting Limited | Other services | 2013 |
| Bctt 2 Limited | Construction | 2008 |
| BDC Environmental Recovery Limited | Real estate | 2015 |
| Beach HUT World Ltd | Construction | 2004 |
| Beautiful Barns Sussex Limited | Administrative & support | 2020 |
| Beckfield Motorsport Ltd | Wholesale & retail | 2022 |
| Beedings Castle Management Company Limited | Households | 2000 |
| Bell Leisure Limited | Construction | 2000 |
| Belmont Skin and Laser Clinic Ltd | Other services | 2026 |
| Berkeley Lodge RTM Company Ltd | Households | 2020 |
| Best One Mens Barbers Ltd | Other services | 2023 |
| BEV and Burt Ltd | Hospitality | 2025 |
| BGG Cottages Management Limited | Households | 2023 |
| Bhbc Management Company Ltd | Households | 2010 |
| Bigbig Limited | Arts & recreation | 2006 |
| Bignor Park Limited | Real estate | 2009 |
| Billingshurst Service Brookdale Farm Limited | Wholesale & retail | 2007 |
| Billy’S Motorcycles Limited | Wholesale & retail | 2019 |
| Bioswift Talent Ltd | Administrative & support | 2020 |
| Bites and Pints Limited | Hospitality | 2019 |
| BJA Investments Limited | Financial services | 2014 |
| Bjork Ltd | Wholesale & retail | 2026 |
| BJP Consultancy Limited | Information & communication | 2014 |
| Black Smoke Events Ltd | Hospitality | 2024 |
| Blakes Grooming Limited | Other services | 2020 |
| Blix Street Records Limited | Information & communication | 2006 |
| Bloc Property Limited | Real estate | 2022 |
| BLU Wave Plumbing Services Ltd | Construction | 2025 |
| Blue Alpine Consulting Limited | Information & communication | 2026 |
| Blue Horizon Enterprises Limited | Administrative & support | 2019 |
| Blue Lions Property Services Limited | Construction | 2020 |
| Blue Tide Marine Ltd | Professional & scientific | 2021 |
| Bluebird Electric Limited | Administrative & support | 2010 |
| Blush Hair Boutique Ltd | Other services | 2017 |
| Body & Face Limited | Other services | 2006 |
| Botany 24 Limited | Administrative & support | 2010 |
| Boxed in Escape Rooms Ltd | Arts & recreation | 2026 |
| BPH Attachments Limited | Wholesale & retail | 2013 |
| BPH Construction Equipment Limited | Administrative & support | 2012 |
| Bracklyn (West Chiltington) Management Company Limited | Households | 2014 |
| Bradshott Properties Ltd | Real estate | 2004 |
| Branded 7 Media Limited | Administrative & support | 2014 |
| Brennos Ltd | Professional & scientific | 2024 |
| Brian Titley Consulting Ltd | Professional & scientific | 2012 |
| Bridgeway RE Ltd | Real estate | 2025 |
| Brighton Maintenance Co Limited | Administrative & support | 2025 |
| Brotherton Atlantic Limited | Real estate | 2019 |
| Bubba Music Ltd | Administrative & support | 2013 |
| Build a Better Future Ltd | Information & communication | 2000 |
| Business Improvements Limited | Professional & scientific | 2008 |
| Bytec Embedded Limited | Manufacturing | 1939 |
| Bytec Healthcare Limited | Manufacturing | 2014 |
| Bytec Systems Limited | Manufacturing | 1994 |
| C Coward Heating Services Limited | Construction | 2014 |
| C.A. Burne Ltd | Professional & scientific | 2005 |
| CA IRA Limited | Wholesale & retail | 2007 |
| Cadogan Mcqueen Freehold Limited | Real estate | 2020 |
| Camouflage Collections Limited | Professional & scientific | 2014 |
| Canamark Limited | Wholesale & retail | 2020 |
| Canary Catering Ltd | Hospitality | 2025 |
| Capital Rise Investments Ltd | Real estate | 2026 |
| CAR4CAR Limited | Extraterritorial | 2025 |
| Cara's EAR Care Ltd | Health & social care | 2026 |
| Carica Media Limited | Extraterritorial | 2014 |
| Carl Rosa Trust Limited | Arts & recreation | 1953 |
| Carver-Hobbs Builders Limited | Construction | 2014 |
| Cashman International Advertising Limited | Professional & scientific | 2005 |
| Castletor Limited | Real estate | 1964 |
| Cattlestone Farm Limited | Agriculture & fishing | 2022 |
| CBS Electrical Contractors Ltd | Construction | 2009 |
| CCF Systems Ltd | Manufacturing | 2009 |
| CCP Global Energy Limited | Professional & scientific | 2018 |
| Cell Electrical Ltd | Construction | 2021 |
| Challypop Limited | Professional & scientific | 2024 |
| Chanctonbury Associates Ltd | Professional & scientific | 2012 |
| Chanctonbury Community Leisure Ltd | Administrative & support | 2020 |
| Chanctonbury Developments Limited | Construction | 2012 |
| Change and Transform Limited | Professional & scientific | 2021 |