| 0/90 Composites Limited | Professional & scientific | 2025 |
| 10 Birmingham Road Management Limited | Real estate | 2003 |
| 1840 by WED & Prosper Ltd | Wholesale & retail | 2023 |
| 2 Union Road LP | | 2005 |
| 3ISEA Ltd | Information & communication | 2025 |
| 45 Vera Road Limited | Households | 2000 |
| 46 Cowes Ltd | Hospitality | 2025 |
| 82 Mill Hill Road Management Company Limited | Households | 2005 |
| 9-11 Thornbank Management Company Limited | Households | 2021 |
| 9D Energy Ltd | Professional & scientific | 2013 |
| A & S Bathroom Installations Ltd | Construction | 2024 |
| A M Powell Contractors Ltd | Construction | 1996 |
| A&H Timber Products Ltd | Manufacturing | 2018 |
| AB Home Maintenance and Advice Ltd | Construction | 2025 |
| Accenco Ltd | Information & communication | 2025 |
| Ace Scaffold (UK) Limited | Construction | 2006 |
| Acorn House (Ryde) Limited | Households | 2006 |
| Actium Labs Ltd | Information & communication | 2026 |
| Activate Switch Ltd | Wholesale & retail | 2012 |
| Adele Smith Ltd | Real estate | 2023 |
| ADL Scaffolding Limited | Construction | 2017 |
| Adventures and Play Ltd | Manufacturing | 2020 |
| Aeolian Offshore Ltd | Transport & logistics | 2022 |
| Aerion Blade Repair Ltd | Manufacturing | 2026 |
| Agenserv Ltd | Administrative & support | 2025 |
| Aglen Estates Limited | Real estate | 2025 |
| Airbob Limited | Manufacturing | 2024 |
| Aito Systems Ltd | Information & communication | 2025 |
| Alexandra House (Shanklin) Management Company Limited | Households | 2001 |
| ALG Blades UK Ltd | Other services | 2025 |
| ALL About Catering Limited | Hospitality | 2006 |
| Alpha Electrical IW Ltd | Construction | 2022 |
| Alpha Plus UK Limited | Administrative & support | 2003 |
| Always Sunny Ltd | Agriculture & fishing | 2022 |
| Alwr Ltd | Real estate | 2020 |
| Amethist Consulting Limited | Professional & scientific | 2011 |
| Amethyst Ecology Ltd | Professional & scientific | 2024 |
| Amon SUL Consulting Ltd | Information & communication | 2026 |
| Andrew White Planning Consultancy Limited | Professional & scientific | 2015 |
| Anpr Parking Management Limited | Administrative & support | 2013 |
| AP Composites Ltd | Manufacturing | 2024 |
| AR Carpentry & Construction Limited | Manufacturing | 2024 |
| Arctic DRY Dock & Slipways Ltd | Manufacturing | 2025 |
| Arctic Shipyard Ltd | Manufacturing | 2025 |
| Ardmair House Nominees Limited | Financial services | 2011 |
| Ardmair Partners LP | | 1997 |
| Argo Radio Mobile Solutions Limited | Information & communication | 2018 |
| Armorel Homes Ltd | Real estate | 2016 |
| ASK LU Limited | Administrative & support | 2025 |
| Aurelion Group Ltd | Wholesale & retail | 2025 |
| Auriol Homes Ltd | Real estate | 2016 |
| AVA Stanley Leather Company Ltd | Wholesale & retail | 2026 |
| Avanti Events Management Limited | Administrative & support | 2026 |
| Avilec Limited | Wholesale & retail | 2002 |
| Ayashmedical Services Ltd | Health & social care | 2022 |
| B G Electrical Solutions Limited | Construction | 2024 |
| B Van-Engel Wind Solutions Ltd | Manufacturing | 2025 |
| Baked With Hart Ltd | Manufacturing | 2022 |
| Ball & Sons Farming Ltd | Agriculture & fishing | 2026 |
| Bang & Whisper Limited | Professional & scientific | 2025 |
| Bash Developments (IOW) Limited | Construction | 2026 |
| BDC Commercial Ltd | Manufacturing | 2020 |
| BDC Holdings Limited | Financial services | 2019 |
| Beach HUT Digital Limited | Information & communication | 2020 |
| Bear & BOY Estates Ltd | Real estate | 2018 |
| Beats on TAP Ltd | Arts & recreation | 2025 |
| Beautine Services Limited | Other services | 2025 |
| Bedebourne Ltd | Wholesale & retail | 2023 |
| Beds `R` US (IOW) Limited | Wholesale & retail | 2008 |
| Beech Park Consultancy Limited | Professional & scientific | 2019 |
| Beekindnetwork Ltd | Information & communication | 2025 |
| Bellamy's (IOW) Limited | Hospitality | 2012 |
| Bellvan Ltd | Manufacturing | 2023 |
| Berry Hill Childcare Limited | Education | 2014 |
| Beyond the Mechanics LLP | | 2017 |
| Blackberry Lane Pre-School | Education | 2004 |
| Blake's Composites Ltd | Wholesale & retail | 2022 |
| Blind Tiger IW Ltd | Hospitality | 2024 |
| Blooms by G Ltd | Wholesale & retail | 2020 |
| Bloomsbury Square Global Capital Limited | Financial services | 2025 |
| Blown Away IW Ltd | Extraterritorial | 2013 |
| BLR Marine Limited | Administrative & support | 2025 |
| Blue Leaf Composites Ltd | Professional & scientific | 2024 |
| Blue Sky Solutions Limited | Administrative & support | 2025 |
| Bluedot Digital Services Ltd. | Information & communication | 2019 |
| BMB Travel Ltd | Administrative & support | 2024 |
| BNV Consulting Limited | Professional & scientific | 2021 |
| Boiler Plus Ltd | Construction | 2020 |
| Boxem Property Ltd | Real estate | 2025 |
| Brain Property Services Limited | Real estate | 2003 |
| Bramble Marine Ltd | Manufacturing | 2021 |
| Bremner Projects Limited | Professional & scientific | 2005 |
| Brewsandhops Ltd | Hospitality | 2025 |
| Bridges for Learning Limited | Health & social care | 2010 |
| Britannia Properties Cowes Ltd | Real estate | 2017 |
| Brooklyn House Residents Management Company Limited | Households | 1993 |
| Brownies EAT OUT Ltd | Hospitality | 2025 |
| Brox Contractors Ltd | Construction | 2025 |
| Bruce & Beken Property Ltd | Real estate | 2026 |
| Brunel Marketplace Limited | Information & communication | 2015 |