| GZR Performance Limited | Wholesale & retail | 2017 |
| H & B 2000 Limited | Construction | 2000 |
| H J South Limited | Wholesale & retail | 2020 |
| H2GROW Ltd | Agriculture & fishing | 2023 |
| H2OT Heating Limited | Construction | 2010 |
| Hair Eleven Ltd | Other services | 2016 |
| HAM Hotel Limited | Hospitality | 2016 |
| HAM PUB Co Ltd | Hospitality | 2016 |
| Hamptons Jewellery Ltd | Wholesale & retail | 2017 |
| Hanna Nails and Spa Ltd | Other services | 2024 |
| Hannah Dampney Wealth Planning Ltd | Professional & scientific | 2025 |
| Hannah Louise Aesthetics Ltd | Other services | 2025 |
| Harborough Heights LLP | | 2022 |
| Harbour Heights Developments Ltd | Real estate | 2025 |
| Harchester Enterprises Limited | Professional & scientific | 2018 |
| Hardware Tech Solutions Ltd | Wholesale & retail | 2022 |
| Harlequin Homes (High Mead) Limited | Construction | 2021 |
| Harlequin Homes (Longham) Limited | Construction | 2019 |
| Harlequin Homes (Oak Park) Limited | Construction | 2021 |
| Harlequin Homes (UK) Limited | Construction | 2014 |
| Harlequin Homes Holdings Limited | Financial services | 2019 |
| Harley Trent Ltd | Wholesale & retail | 2021 |
| Harliza Limited | Construction | 2014 |
| Hartley Consultancy Services Ltd | Professional & scientific | 2024 |
| Harvey Court (Ferndown) Limited | Households | 2021 |
| Harvey Court Block B RTM Company Limited | Households | 2025 |
| Haskins Group Limited | Professional & scientific | 2000 |
| Havaners Limited | Wholesale & retail | 2023 |
| Hawa Investment Limited | Real estate | 2003 |
| HAY Bale Properties Limited | Real estate | 2020 |
| Haybale Limited | Professional & scientific | 2023 |
| Hayley Davis Golf Ltd | Arts & recreation | 2022 |
| Headspace Hypno Limited | Health & social care | 2020 |
| Healthy Living James Ltd | Hospitality | 2018 |
| Heatline Plumbing & Heating Limited | Construction | 2007 |
| Helium Ltd | Professional & scientific | 2016 |
| Hemotion (U.K) Ltd. | Wholesale & retail | 2006 |
| Hereier Ltd | Wholesale & retail | 2021 |
| Heritage Sporting Group Limited | Arts & recreation | 2015 |
| HH & DLP Limited | Real estate | 2024 |
| High 5 Activities Ltd | Arts & recreation | 2024 |
| High Mead Farm Community Interest Company | Agriculture & fishing | 2012 |
| Highcroft Property Management Limited | Households | 2002 |
| Highwood Project Consultancy Limited | Administrative & support | 2015 |
| Hillside Vehicle Services Limited | Wholesale & retail | 2018 |
| Hines Pitt LLP | | 2013 |
| Hizircan Limited | Hospitality | 2017 |
| Hoare Developments Ltd | Construction | 2017 |
| Hobgoblins Hideaway Comics Ltd | Wholesale & retail | 2025 |
| Holgates Homes Limited | Construction | 2023 |
| Holiday Lets Bournemouth Limited | Real estate | 2022 |
| Holiday Overseas Ltd | Real estate | 2010 |
| Holly Close (West Moors) Limited | Households | 2003 |
| Holst Andrews Social Limited | Professional & scientific | 2018 |
| Holtwood Homes Limited | Construction | 2011 |
| Home Energy Advice Ltd | Extraterritorial | 2025 |
| Home Glow Electrical Ltd | Construction | 2026 |
| Homeward Bound Travel Limited | Transport & logistics | 2012 |
| Hoof Hearted Limited | Administrative & support | 2009 |
| Hoolabaloo Limited | Wholesale & retail | 2008 |
| Hopscotch Pre-School CIC | Education | 2014 |
| Horizn Media Ltd | Information & communication | 2024 |
| Housecall Limited | Professional & scientific | 2024 |
| Howbeck Consultancy Limited | Professional & scientific | 2025 |
| Hunford Homes Limited | Real estate | 2020 |
| Hunnings Homes Limited | Real estate | 2018 |
| Hunter and Hall Ltd | Professional & scientific | 2021 |
| Hunting Star Limited | Professional & scientific | 2015 |
| Huntley Estates Ltd | Real estate | 2018 |
| Hurn Bridge Equestrian Centre Limited | Arts & recreation | 2011 |
| Huttons Hair and Beauty Limited | Other services | 2026 |
| Hygiene Trading Ltd | Wholesale & retail | 2024 |
| I J Penfold Investments Ltd | Financial services | 2026 |
| I Tell Stories Limited | Professional & scientific | 2016 |
| I.W Property Investments Ltd | Hospitality | 2025 |
| I4C (Psychic Readings) Limited | Other services | 2001 |
| I@Car Ltd | Transport & logistics | 2021 |
| Ibizhair Limited | Real estate | 2020 |
| Iclpearl Limited | Administrative & support | 2010 |
| Ideal Skip Hire (Southern) Ltd | Administrative & support | 1997 |
| Ideal Skip Hire Limited | Extraterritorial | 1994 |
| Ignite Alternative Education Limited | Education | 2025 |
| Ignitelab Limited | Wholesale & retail | 2023 |
| Image Financial Investments Limited | Financial services | 2022 |
| Image Line Digital Print Limited | Manufacturing | 2007 |
| Image Retail Solutions Ltd. | Information & communication | 2015 |
| Immax Investments Limited | Real estate | 2017 |
| Impressions Property Investments Ltd | Real estate | 2025 |
| IN Touch Retail Solutions Limited | Wholesale & retail | 2006 |
| Independent Computer Services Limited | Information & communication | 1993 |
| Independent Hearing Services Limited | Health & social care | 2001 |
| Individuality Swimming Limited | Education | 2017 |
| Individuality Training Limited | Education | 2020 |
| Industrial Laser Cleaning Solutions - Ilcs Ltd | Wholesale & retail | 2024 |
| Infinite Clarity Limited | Health & social care | 2011 |
| Infinity Accountancy Limited | Professional & scientific | 2020 |
| Infinity Business Associates Limited | Professional & scientific | 2020 |
| Infinity Parcel Solutions Ltd | Transport & logistics | 2020 |
| Inner Strength Safe Steps CIC | Arts & recreation | 2025 |
| Innercity Studios Limited | Information & communication | 2024 |