| GRM Wealth Ltd | Professional & scientific | 2026 |
| Grosvenor Heights RTM Company Limited | Households | 2020 |
| Gstress Limited | Professional & scientific | 2018 |
| Guitar FX Direct Limited | Wholesale & retail | 2020 |
| Gullivers Osteopathy Limited | Health & social care | 2014 |
| Gwct Natural Capital Advisory Limited | Professional & scientific | 2022 |
| Gworx Ltd | Construction | 2024 |
| H&Hmedicalaesthetics Limited | Health & social care | 2026 |
| H2 International Ltd | Professional & scientific | 2019 |
| Haid Ltd | Professional & scientific | 2014 |
| Halcyon Marine Limited | Professional & scientific | 2006 |
| Hare Digital Ltd | Information & communication | 2012 |
| Harthill Services (UK) Ltd | Health & social care | 2011 |
| Harts Rise Management Company Limited | Households | 2009 |
| Haslar Aero Club Ltd | Arts & recreation | 2025 |
| Haumi OKI Limited | Financial services | 2023 |
| Hawkins Management Consultancy Ltd | Professional & scientific | 2011 |
| Healthcare and Community Construction Limited | Construction | 2003 |
| Healthfinder Tech Ltd | Information & communication | 2023 |
| Hearts at Home Care Limited | Health & social care | 2015 |
| Heathside Courts Management Company Limited | Households | 1979 |
| Herrington Coaches Limited | Transport & logistics | 2003 |
| HG Accountancy Limited | Professional & scientific | 2024 |
| High Spec Window Cleaning Ltd | Administrative & support | 2019 |
| Highbank Gardens Management Company (1997) Limited | Households | 1996 |
| Hilltop (Bury) Limited | Hospitality | 2007 |
| Hinton Collective Ltd | Professional & scientific | 2018 |
| Hirst Commercial Limited | Real estate | 2020 |
| Hockey's Farm Shop Limited | Wholesale & retail | 2017 |
| Homelife Outdoors Ltd | Wholesale & retail | 2022 |
| Homeseptic Ltd | Professional & scientific | 2018 |
| Honed True Ltd | Manufacturing | 2026 |
| Hooper Construction Ltd | Construction | 2016 |
| Horseshoe Management (Bournemouth) Limited | Households | 1995 |
| Howard Property Rentals Investments Limited | Real estate | 2021 |
| Humanity Unite Holdings Limited | Professional & scientific | 2017 |
| Hummingbee Works Ltd | Administrative & support | 2018 |
| Hurfords Heating Ltd | Construction | 2022 |
| Hyde Country Stores Ltd | Wholesale & retail | 2022 |
| Hygge Property Group Limited | Real estate | 2019 |
| IAN Lott Ltd | Wholesale & retail | 2018 |
| Ice Cream Bournemouth Limited | Wholesale & retail | 2024 |
| Idealescape Club Ltd | Hospitality | 2019 |
| Imperious Technologies Limited | Professional & scientific | 2015 |
| Incare International Limited | Transport & logistics | 1983 |
| Incarnadine Productions Limited | Information & communication | 2013 |
| Infinity Business Finance Limited | Financial services | 2019 |
| Infinity Financial Group Holdings Limited | Financial services | 2023 |
| Infinity Financial Solutions Limited | Professional & scientific | 2022 |
| Infinity HQ Limited | Real estate | 2026 |
| Inside Minds Ltd | Arts & recreation | 2014 |
| Inspirementor Limited | Professional & scientific | 2018 |
| Intelligenic Health Ltd | Information & communication | 2020 |
| Intercognition Ltd | Information & communication | 2000 |
| Interperformant Systems Ltd | Information & communication | 2021 |
| Inthepitapp Limited | Information & communication | 2025 |
| Inventta Ltd | Manufacturing | 2016 |
| INVESTMENT101 Ltd | Real estate | 2023 |
| IPH Associates Limited | Arts & recreation | 1995 |
| Iqia Limited | Professional & scientific | 2012 |
| Irving and Co Studios Limited | Professional & scientific | 2011 |
| Isabelle Lomas Limited | Professional & scientific | 2016 |
| IT Figures (London) Ltd | Professional & scientific | 2004 |
| Itch Film Limited | Extraterritorial | 2006 |
| ITP Investment Ltd | Financial services | 2022 |
| ITT International Tefl and Tesol Ltd | Education | 2019 |
| J EMM Handyman Services Limited | Construction | 2026 |
| J Williamson Engineering Limited | Wholesale & retail | 2025 |
| J. Horne Ltd | Information & communication | 2015 |
| J.C.W. Hiab Services Limited | Transport & logistics | 2013 |
| J.S. Webb Ltd. | Construction | 2025 |
| Jack Baker Limited | Agriculture & fishing | 1948 |
| Jacks Groundworks Limited | Construction | 2003 |
| Jacob Carr Homes (Highlands Management) Limited | Households | 2018 |
| James Ferry Interiors Ltd | Manufacturing | 2014 |
| James Ferry Ltd | Manufacturing | 2016 |
| Jane the Florist Ltd | Wholesale & retail | 2008 |
| Jennings Advisory Services Limited | Financial services | 2022 |
| Jeremy Barrell Expert Witness Limited | Professional & scientific | 2020 |
| Jervisreadpsychology Ltd | Health & social care | 2019 |
| Jess Bradley Educational Psychology Limited | Education | 2024 |
| Jessica Thomas Limited | Information & communication | 2010 |
| JF Orme Consulting Limited | Professional & scientific | 2026 |
| Jfico Limited | Construction | 2022 |
| JLP Holdings and Investments Limited | Real estate | 2019 |
| Jlstax Limited | Other services | 2015 |
| JM Building Works Ltd | Construction | 2026 |
| Jonathan Rust Family Funeral Directors Ltd | Other services | 2023 |
| Jones Films Limited | Information & communication | 2010 |
| Jones&Company Ltd | Wholesale & retail | 2020 |
| JPB Cook Limited | Construction | 2021 |
| Jr.Timber Services Ltd | Agriculture & fishing | 2020 |
| Jubilee Camping Ltd | Hospitality | 2018 |
| Judicial Review Limited | Administrative & support | 2004 |
| Jupiter Invader Pump Co Ltd | Manufacturing | 2013 |
| Just DO Film & TV Limited | Information & communication | 2025 |
| K. & T. (Engineers) Limited | Manufacturing | 1973 |
| Kalista Aesthetics Ltd | Other services | 2020 |
| Kateskitchen Microbakery Ltd | Wholesale & retail | 2025 |
| KAW Productions Ltd. | Agriculture & fishing | 2022 |