| Hodge & Childs Limited | Professional & scientific | 1963 |
| Holbrook Architechtural Services Limited | Professional & scientific | 2005 |
| House of Good Companions Limited(The) | Households | 1953 |
| House of Yoga Psychology Ltd | Health & social care | 2022 |
| Hovertransport Limited | Transport & logistics | 1996 |
| Howards Corner (Freshwater) Limited | Hospitality | 1999 |
| HS Europe Limited | Manufacturing | 2006 |
| Hybrid Marine Limited | Manufacturing | 1999 |
| I 2 S Strategic Ltd | Financial services | 2020 |
| IF 7 Limited | Manufacturing | 2000 |
| Island Ales Limited | Wholesale & retail | 1993 |
| Island Furnishing Ltd | Wholesale & retail | 2006 |
| Island Homes Limited | Construction | 1987 |
| Island Management & Maintenance Services Limited | Real estate | 2026 |
| Island Mobility Limited | Wholesale & retail | 1965 |
| Island Vetcare Holdings Limited | Financial services | 2026 |
| Islander Limited | Mining & quarrying | 2017 |
| Isle of Wight Grain Services Limited | Wholesale & retail | 1981 |
| Isle of Wight Hunt Kennels Limited(The) | Other services | 1926 |
| Isle of Wight Railway Company Limited (the) | Manufacturing | 1972 |
| J & B Developments (IOW) Limited | Real estate | 2004 |
| J. Valvona Transport (IOW) Limited | | 1980 |
| JA Dempsey Civil Engineering Ltd. | Construction | 2003 |
| JIM Pritchard Limited | Professional & scientific | 1999 |
| JO Richards Design Limited | Other services | 1996 |
| JVP Lettings Ltd | Real estate | 2023 |
| Kardan Travel Limited | Transport & logistics | 2003 |
| Kassabian & Kassabian | | 1989 |
| Kemkay Limited | Wholesale & retail | 2004 |
| Kensington Health Care Limited | Health & social care | 1996 |
| Keyway Engineering Limited | | 1981 |
| Kjml Limited | Real estate | 2019 |
| Lacey's (I.O.W.) Limited | Transport & logistics | 1958 |
| Ladies Realm Limited | Real estate | 1934 |
| LAY Line Limited | Other services | 2000 |
| Leslie's Car Sales (I.O.W.) Limited | Wholesale & retail | 1965 |
| Leslie's Service Station Limited | Wholesale & retail | 1965 |
| Leslies (Ventnor) Limited | Wholesale & retail | 1947 |
| Linear Kitchen Designs Ltd | Wholesale & retail | 2004 |
| Loys Chinese Takeaway Ltd | Hospitality | 2024 |
| Lucas Maritime Limited | Professional & scientific | 2007 |
| Lupton Auto Electrical Limited | Wholesale & retail | 2003 |
| M & K Utilities Limited | Construction | 2001 |
| M.C.M. Construction Limited | Construction | 1992 |
| M.L. Lake (Electrical Services) Limited | Wholesale & retail | 1972 |
| Malcolm Perry Social Landlord Limited | Real estate | 2018 |
| MANAGEMENT55 Limited | Real estate | 2020 |
| Market Media Impact Ltd | Professional & scientific | 2024 |
| Marketingenius Limited | Administrative & support | 1997 |
| Maxx Car Valeting Ltd | Other services | 2019 |
| MBJ Motor Factors Limited | Wholesale & retail | 2001 |
| MCM Contractors Limited | Construction | 2017 |
| MCM Plant Limited | Construction | 2001 |
| Meadow Barn Management Company Limited | Other services | 2006 |
| Medina Dental Laboratory Limited | Health & social care | 2007 |
| Medina Valley Centre Limited | Hospitality | 1964 |
| Medislim Limited | Health & social care | 1988 |
| Mersley 25 Ltd | Hospitality | 2025 |
| Metropolitan & Provincial Investments Limited | Professional & scientific | 1985 |
| MFJ Industrial Properties Ltd | Real estate | 2020 |
| MFJ Properties Ltd | Real estate | 2009 |
| Micutat Ltd | Wholesale & retail | 2023 |
| Millenium Windows (IW) Ltd | Manufacturing | 2006 |
| More (IW) Ltd | Real estate | 2004 |
| Mornington Mews Grounds Maintenance Limited | Households | 2025 |
| Nail Emporium | | 2007 |
| Naturezones Wildlife Education Trust | Agriculture & fishing | 2007 |
| Newnham Scaffold | | 1997 |
| Newport Laundrutte Limited | Other services | 2018 |
| Niton Pre-School | Education | 2003 |
| Nook and More Ltd | Real estate | 2025 |
| Oasis Interior Landscapes Limited | Wholesale & retail | 1996 |
| ON the Wight Ltd | Information & communication | 2017 |
| Only Yogi Ltd | Education | 2024 |
| Orchard Financial Services | | 1992 |
| Park Lane Farm Ltd | Extraterritorial | 2005 |
| Park Properties (Isle of Wight) Limited | Real estate | 1959 |
| Pascall Atkey and SON Limited | Wholesale & retail | 1962 |
| Paving Centre Limited | Construction | 1996 |
| Pecks Limited | Wholesale & retail | 2005 |
| Pellhurst Management Services Limited | Households | 2003 |
| Pembell Limited | Wholesale & retail | 1989 |
| Perry Properties (IW) Limited | Construction | 2018 |
| Peter Ferns Architecture Ltd | Professional & scientific | 2005 |
| Physiocare (Isle of Wight) Limited | Health & social care | 2006 |
| PJ Leggett Management Limited | Wholesale & retail | 1998 |
| Platform One (IOW) Limited | Education | 2000 |
| Puckaster Lodge Management Company Limited | Extraterritorial | 1993 |
| Quadet Construction Limited | | 1975 |
| Quinta Cottages Limited | Transport & logistics | 2003 |
| R & R Containers Ltd | Wholesale & retail | 2006 |
| R C Orchard Limited | Professional & scientific | 2006 |
| Rcyc (Cowes) Limited | Other services | 1992 |
| Regent (UK) Services Limited | Wholesale & retail | 1998 |
| Ripa Food Ltd | Hospitality | 1997 |
| RJ Foreman Mechanical Engineering Limited | Administrative & support | 1999 |
| RJ Williams & Sons Limited | Construction | 1999 |
| Ross Realty Limited | Construction | 2000 |
| Roxey Limited | Hospitality | 2019 |
| Royal Solent Yacht Club Limited | Hospitality | 2004 |