| Barn Door Events Ltd | Hospitality | 2024 |
| Barretts Shoe Repairs Limited | Other services | 2003 |
| Barton Court Limited | Households | 2003 |
| Bay of Bengal Portsmouth Hayling Ltd | Hospitality | 2024 |
| Bayliss Property Limited | Professional & scientific | 2020 |
| Beach Road Garage Limited | Wholesale & retail | 2002 |
| Beastfeast Ltd | Transport & logistics | 2022 |
| Beckworth Investment & Development Limited | Real estate | 2006 |
| Beckworth Services Limited | Manufacturing | 2015 |
| Bedhampton Flats Management Limited | Households | 1971 |
| Bell Kiva Consulting Limited | Professional & scientific | 2022 |
| Belmont Gardens Management Co. Limited | Real estate | 2002 |
| BEN & Shelley's Ice Cream Parlour Ltd | Wholesale & retail | 2024 |
| Benctodd Ltd | Wholesale & retail | 2025 |
| Bennetts Builds Limited | Construction | 2023 |
| Bentley Telecom Limited | Information & communication | 2000 |
| Bespoke Airconditioning Ltd | Manufacturing | 2015 |
| Bespoke Expo Ltd | Construction | 2021 |
| BESTPRICE4U247 Ltd | Wholesale & retail | 2014 |
| Bexely Ltd | Information & communication | 2025 |
| Big Mango Limited | Wholesale & retail | 2023 |
| Big Sky Games Limited | Other services | 2019 |
| Black Point Associates Limited | Professional & scientific | 2012 |
| Blacklake Supplies Ltd | Wholesale & retail | 2019 |
| Blackpoint Accounting Limited | Professional & scientific | 2018 |
| Blackpoint Payroll & HR Limited | Professional & scientific | 2018 |
| Bloo Sky Projects Ltd | Professional & scientific | 2016 |
| Blue and Green Consultancy Ltd | Professional & scientific | 2008 |
| Blue Digital Ideas Ltd | Information & communication | 2010 |
| Bourneside Ltd | Real estate | 2020 |
| Box of Sport Ltd | Wholesale & retail | 2025 |
| Bracklesham Bay Developments Ltd | Hospitality | 2010 |
| Brainybudz CIC | Information & communication | 2025 |
| Breeze Transfers Limited | Transport & logistics | 2018 |
| Brett Consultancy Ltd | Professional & scientific | 2021 |
| Brewers Property Solutions Ltd | Real estate | 2024 |
| Brewgas Limited | Extraterritorial | 1997 |
| Bright Horizon Painting Limited | Construction | 2025 |
| Britcher Watches Limited | Manufacturing | 2023 |
| BS Lettings Ltd | Real estate | 2024 |
| Business Money Partnership Limited | Financial services | 2008 |
| BWP Ventures Ltd | Professional & scientific | 2026 |
| Bywaves Limited | Hospitality | 1983 |
| C & L South Developments Ltd | Real estate | 2015 |
| C D W Building Services Limited | Construction | 2012 |
| C F International Limited | Manufacturing | 2006 |
| C I Management Services Limited | Real estate | 2005 |
| C2 IT Consulting Ltd | Information & communication | 2026 |
| Calico Cabinets Limited | Manufacturing | 2014 |
| CAN DO Business Services Limited | Professional & scientific | 1991 |
| CAN DO Lets Limited | Real estate | 2021 |
| Cannaex Trades Ltd | Wholesale & retail | 2023 |
| Cannaworth Ltd | Wholesale & retail | 2024 |
| Capture Design and Print Ltd | Professional & scientific | 2014 |
| CARDS4OCCASIONS Limited | Wholesale & retail | 2020 |
| Carter Pure Clean Services Ltd | Administrative & support | 2023 |
| Casis Ltd | Administrative & support | 2016 |
| Cassidy Estates Limited | Real estate | 2001 |
| Cathedral View Dntl Ltd | Health & social care | 2026 |
| Cathedral View Dntl Property Limited | Health & social care | 2026 |
| CB Freeholders Ltd | Administrative & support | 2017 |
| CBD Health 4 YOU Limited | Wholesale & retail | 2017 |
| CBK (Hayling Island) Limited | Arts & recreation | 2011 |
| Cedar Lodge Garden Rooms Ltd | Construction | 2022 |
| Century Court (Hayling Island) Limited | Real estate | 2005 |
| Cfum Ltd | Wholesale & retail | 2013 |
| CG Mech Ltd | Wholesale & retail | 2023 |
| Charlton House (Hayling Island) Ltd | Professional & scientific | 1999 |
| CHI Building Contractors Ltd | Construction | 2010 |
| Chichester Classics Ltd | Wholesale & retail | 2026 |
| Child Roofing Limited | Construction | 2024 |
| Children's Home Recruitment Ltd | Administrative & support | 2024 |
| Ciel Investments Limited | Real estate | 2021 |
| Ciel Ventures Ltd | Information & communication | 2021 |
| Clearcargo Limited | Professional & scientific | 2016 |
| CLJ Services Limited | Professional & scientific | 2019 |
| Cloud Nine Planning Limited | Information & communication | 2009 |
| Cloud Radar Consulting Limited | Information & communication | 2017 |
| Co-Creating Transformation CIC | Professional & scientific | 2023 |
| Coastal Closet 26 Limited | Wholesale & retail | 2025 |
| Coles Corner Limited | Real estate | 2006 |
| Commercial Finance Corporation Limited | Professional & scientific | 2013 |
| Commercial Investments (UK) Limited | Real estate | 2013 |
| Cooper Morgan Limited | Real estate | 2006 |
| Cooper Morgan Yachtco Limited | Financial services | 2021 |
| Cordell Gardening Contractors Limited | Other services | 2003 |
| Corestone Investments Limited | Financial services | 2019 |
| Cortina Limited | Real estate | 1998 |
| Cosy GAS Limited | Construction | 2017 |
| Country Pets Limited | Wholesale & retail | 2017 |
| Cover Marsh Limited | Professional & scientific | 2011 |
| CRE8TIVITY Limited | Manufacturing | 2008 |
| Creative Success Ltd | Information & communication | 2008 |
| Croft Financial Advice Ltd | Financial services | 2014 |
| Croydon Urology Associates Limited | Health & social care | 2014 |
| Crwn Ltd | Wholesale & retail | 2024 |
| Crwn Mason Ltd | Information & communication | 2026 |
| CTA Consulting Limited | Administrative & support | 2008 |
| Cuando HOY Limited | Information & communication | 2015 |
| Currie Design & Construction Limited | Construction | 2003 |