| Coast & Country Catering Equipment Ltd | Administrative & support | 2010 |
| Coast and Country Marquees Limited | Administrative & support | 2009 |
| Collins Contracting Limited | Agriculture & fishing | 2025 |
| Colwell Bay View Limited | Construction | 2021 |
| Complete Canine Training Limited | Other services | 2024 |
| Complete Construction IOW Ltd | Construction | 2025 |
| Constabulary House Ltd | Real estate | 2020 |
| Cooks Castle Stables & Cattery Ltd | Agriculture & fishing | 2015 |
| Cool Solutions (Southern) Ltd | Energy | 2008 |
| Coral Gables Limited | Real estate | 2021 |
| Cornerstone Developments (IOW) Limited | Extraterritorial | 2016 |
| Cotterpillar Limited | Manufacturing | 2017 |
| Creative Sales (IOW) Ltd | Wholesale & retail | 2023 |
| CS Country Contracting Ltd | Agriculture & fishing | 2022 |
| CSS & C Developments Ltd | Construction | 2020 |
| Cubeez Limited | Information & communication | 1999 |
| D a M Cronin (LSW) Ltd | Health & social care | 2015 |
| D C Engineering IOW Ltd | Manufacturing | 2025 |
| Daft Trader Ltd | Financial services | 2023 |
| Dalyan Ventnor Ltd | Hospitality | 2020 |
| DAN Hemmington Ltd | Information & communication | 2015 |
| Daoud Limited | Hospitality | 2006 |
| Darley House Ltd | Households | 2017 |
| Datatrail Limited | Wholesale & retail | 1980 |
| David Preston Builders Limited | Administrative & support | 2023 |
| DEL Holdings Ltd | Real estate | 2019 |
| Dellbrook Limited | Financial services | 1989 |
| Denarium Ltd | Professional & scientific | 2022 |
| Dennfinn Ltd | Real estate | 2021 |
| Discover More CIC | Arts & recreation | 2025 |
| Dixcey Landscapes Limited | Administrative & support | 2016 |
| DNI Solutions Limited | Construction | 2012 |
| Domestic Commercial GAS Limited | Construction | 2017 |
| Don'T Rain Ltd | Arts & recreation | 2015 |
| Doris Pinks Limited | Wholesale & retail | 2012 |
| Downside House Limited | Health & social care | 2002 |
| Dream Louder Ltd | Professional & scientific | 2022 |
| Drift Dance School Ltd | Arts & recreation | 2026 |
| Dugard Group Limited | Financial services | 2025 |
| Dugard Leasehold Ltd | Real estate | 2022 |
| Ears Peeled Music Ltd | Information & communication | 2022 |
| ECW Investment Services Limited | Financial services | 2016 |
| Education Destination Limited | Administrative & support | 2014 |
| Education Recruit Ltd | Education | 2021 |
| Eklectica Ltd | Arts & recreation | 1985 |
| Elevate Scaffolding Specialist Ltd | Construction | 2023 |
| Elite Groundworks and Construction Ltd | Construction | 2023 |
| Elizabeth House Management (Ventnor) Limited | Households | 1997 |
| Enchanted Manors Limited | Hospitality | 2020 |
| Esplanade Carvery & Grill Limited | Hospitality | 2019 |
| Esplanade Ventures Limited | Hospitality | 2019 |
| Eversley Hotel Limited | Hospitality | 1963 |
| Everything Crockery Ltd | Administrative & support | 2013 |
| Evolvemultimedia Ltd | Information & communication | 2019 |
| Fabric Service (Oxford) Limited | Professional & scientific | 1985 |
| Fence IT (IOW) Ltd | Construction | 2024 |
| Fernhurst Property Ltd | Hospitality | 2020 |
| Ferrin GAS Services Limited | Construction | 2023 |
| Fieldstudy Ltd | Wholesale & retail | 2022 |
| Fifty One Degrees North Ltd | Real estate | 2020 |
| Findon Storage Ltd | Construction | 1962 |
| Fivepages Publishing Limited | Information & communication | 2023 |
| FLO Financial Services Ltd | Professional & scientific | 2020 |
| FMH PUB Company Limited | Professional & scientific | 2023 |
| Frazer-Wight Limited | Real estate | 2003 |
| Future Focus Partnership Limited | Real estate | 2016 |
| Future Isle of Wight CIC | Health & social care | 2017 |
| GCP IOW Limited | Real estate | 2016 |
| Gearing Scientific Limited | Wholesale & retail | 2001 |
| Glenbrook Consultancy Limited | Information & communication | 2012 |
| Glenfield Consulting Limited | Professional & scientific | 2016 |
| Global I and P Ltd | Professional & scientific | 2001 |
| GNR Tech IW Ltd | Manufacturing | 2024 |
| Godshill Cider Barn Limited | Wholesale & retail | 2025 |
| Godshill Park Property Services Limited | Hospitality | 2013 |
| Golden Goblet Hospitality Ltd | Hospitality | 2025 |
| Goode Developments Limited | Other services | 2015 |
| Graham Brady Consulting Limited | Professional & scientific | 2023 |
| Grays Coast & Country Marquees Ltd | Administrative & support | 2016 |
| Grays Marquees Ltd | Administrative & support | 2011 |
| Great Appleford Barns (IOW) Residents Association Limited | Households | 2008 |
| Greenbank Management (Isle of Wight) Company Limited | Households | 2000 |
| Hampton IOW Properties Limited | Construction | 2025 |
| Haven Support (IOW) Limited | Health & social care | 2019 |
| Hawthorne Management Company Limited | Real estate | 1989 |
| HCS Bar Services Ltd | Real estate | 2025 |
| Heatworks IW Ltd | Construction | 2026 |
| Hender Technology Limited | Wholesale & retail | 2005 |
| HGE Consultancy Limited | Professional & scientific | 2025 |
| HGE Limited | Construction | 2021 |
| HHS Homes Limited | Construction | 2022 |
| HI - LO Buggy Company Ltd | Wholesale & retail | 2020 |
| High ST Bar Co Limited | Extraterritorial | 2017 |
| HLC Real Estate Ltd | Real estate | 2025 |
| Homegrown Community Events C.I.C. | Arts & recreation | 2024 |
| Honeybourne Jewellery Limited | Wholesale & retail | 2010 |
| I C U C Limited | Professional & scientific | 1988 |
| IAN Peters Limited | Manufacturing | 2012 |
| ICB Services (IW) Ltd | Construction | 2013 |
| Idealli Ltd | Wholesale & retail | 2012 |