| IN Safe Hands Home Care Limited | Real estate | 2011 |
| Insulation Extraction Limited | Construction | 2014 |
| Integra Aesthetics Group Limited | Administrative & support | 2026 |
| Intermission Limited | Information & communication | 2023 |
| IOW Primary Care Ltd | Health & social care | 2024 |
| Island Community School | Education | 2012 |
| Island Divers Limited | Arts & recreation | 2006 |
| Island Entertainments Limited | Administrative & support | 2008 |
| Island Getaways Ltd | Extraterritorial | 2021 |
| Island Memorials Limited | Health & social care | 2017 |
| Island Scientific Limited | Manufacturing | 1984 |
| Island Spirits Distillery Ltd | Manufacturing | 2021 |
| Island Tree Services Ltd | Agriculture & fishing | 2026 |
| Isle of Wight Bouncy Castle Hire Limited | Administrative & support | 2020 |
| Isle of Wight Cultural Investment Company Limited | Arts & recreation | 2020 |
| Isle of Wight GIN Company Ltd | Manufacturing | 2022 |
| Isle of Wight Property Services Ltd | Manufacturing | 2025 |
| Isle of Wight Sea Pool | Arts & recreation | 2024 |
| J Murphy Electrical Solutions Ltd | Construction | 2025 |
| Jadestone Recycling Ltd | Water & waste | 2006 |
| Jadestone Traders Limited | Real estate | 2002 |
| Jayden Hitchcock Ltd | Administrative & support | 2026 |
| Jeelek Ltd | Construction | 2021 |
| JG Carpentry Ltd | Construction | 2015 |
| John Hughes ELT Limited | Information & communication | 2011 |
| JPC Demolition LLP | | 2008 |
| JW Autoshine Vehicle Detailing Ltd | Wholesale & retail | 2017 |
| K C Contracts Limited | Extraterritorial | 2013 |
| Karen Elaine Lewis Ltd | Professional & scientific | 2019 |
| Karls Student Accommodation Ltd | Real estate | 2026 |
| Kerbascend Limited | Manufacturing | 2018 |
| Kingsley Court Residents Association (Kidlington) Limited | Households | 1978 |
| Kinship Circles Training Limited | Education | 2021 |
| KJ Home Improvements Ltd | Administrative & support | 2014 |
| Kjsd Ltd | Wholesale & retail | 2026 |
| Knotyachting Ltd | Professional & scientific | 2025 |
| Labworks Games Ltd | Information & communication | 2025 |
| Lake Farm Partnership Limited | Real estate | 2024 |
| Laura Hemmington Copywriting Ltd | Professional & scientific | 2017 |
| Lavery Mead Consulting Ltd | Information & communication | 2013 |
| LD (IW) Ltd | Construction | 2020 |
| Light Partners Limited | Wholesale & retail | 2003 |
| Living Wood Home Ltd | Construction | 2025 |
| LM Consultancy Solutions Ltd | Professional & scientific | 2025 |
| Loftus Property Development & Investment Ltd | Real estate | 2024 |
| Love for Tiny Paws Ltd | Other services | 2026 |
| Lowein-Levy Ltd | Professional & scientific | 2019 |
| Lower Dolcoppice Farm Holidays Limited | Hospitality | 2013 |
| Lynn Hamilton Healthy Communication Limited | Professional & scientific | 2015 |
| M B Boilers Limited | Construction | 2023 |
| Mackenzie Refurbishment IOW Ltd | Construction | 2017 |
| MAD Island Services Ltd. | Hospitality | 2024 |
| Mango Orchard Ltd | Hospitality | 2024 |
| Maples (Bonchurch) Management Company Limited(The) | Professional & scientific | 1987 |
| Marine Management Consultancy Limited | Professional & scientific | 2002 |
| Marine Parade Association Limited | Households | 2014 |
| Marlborough Properties Limited | Real estate | 1993 |
| Masala Bay Limited | Hospitality | 2016 |
| Mattinson Associates Limited | Professional & scientific | 2004 |
| Mertoun Management Company Limited | Households | 2022 |
| Metlgen Ltd | Wholesale & retail | 2011 |
| Mill Street Consultancy Limited | Professional & scientific | 2005 |
| Millers Barns Development Ltd | Construction | 2025 |
| MJP Construction IOW Ltd | Construction | 2022 |
| MJT Property IOW Ltd | Real estate | 2019 |
| MMC Diving Services Ltd | Construction | 1992 |
| Model Village Godshill Limited | Arts & recreation | 2004 |
| Moose Digital Media Limited | Professional & scientific | 2024 |
| Morgan Huws Limited | Transport & logistics | 2023 |
| MRC Construction IOW Ltd | Construction | 2023 |
| Mushi the REX Limited | Hospitality | 2025 |
| N Brayley Roofing Limited | Construction | 2024 |
| Natural Farmer Ltd | Agriculture & fishing | 2019 |
| Nature Island Nursery Ltd | Agriculture & fishing | 2026 |
| NB Hire Limited | Construction | 2020 |
| Ndle Ltd | Construction | 2017 |
| Newport Nursery Limited | Wholesale & retail | 2017 |
| Nikkicp Ltd | Professional & scientific | 2026 |
| Niton Community Football Club Ltd | Administrative & support | 2016 |
| Niton Harbour Club | Professional & scientific | 2015 |
| Niton Undercliff Garage Limited | Wholesale & retail | 2003 |
| Norris Family Grocers Limited | Professional & scientific | 1992 |
| Novus LUX Ltd | Real estate | 2021 |
| O'Toole Property Group Limited | Real estate | 2025 |
| Old Fernleigh Limited | Extraterritorial | 2012 |
| Old School Court Wroxall Management Company Limited | Households | 2019 |
| Onslow Court Limited | Households | 2014 |
| Osterley Management (Ventnor) Limited | Real estate | 2000 |
| P.J. Vanassche Limited | Agriculture & fishing | 1974 |
| Parsons Popculture Ltd | Wholesale & retail | 2023 |
| Paul Clark and Co Limited | Professional & scientific | 2023 |
| Peer Studios Community Interest Company | Arts & recreation | 2023 |
| Pepperblue Productions Limited | Information & communication | 2025 |
| Period & Modern Joinery Limited | Manufacturing | 2006 |
| Pictureperfectpubs Ltd | Hospitality | 2026 |
| Polarmax Limited | Hospitality | 2011 |
| Prime Residential Limited | Construction | 2001 |
| Pro Charge EV Ltd | Construction | 2026 |
| Property Developments (Isle of Wight) Limited | Construction | 2003 |
| Puckwell Farm Management Company Limited | Extraterritorial | 2013 |