| Hathats Coffee Leas Coastal Limited | Hospitality | 2023 |
| Hatton Landscapes Ltd | Construction | 2017 |
| Haulageco Limited | Transport & logistics | 1987 |
| Haulexe Ltd | Transport & logistics | 2025 |
| Hawks Property Management Ltd | Construction | 2026 |
| Hawksdown Lodge Residents Limited | Households | 2011 |
| HAY Architects Limited | Administrative & support | 2018 |
| Headway Doors and Windows Limited | Manufacturing | 2002 |
| Headway Trade Window Systems Limited | Extraterritorial | 2019 |
| Health Coaching in Motion Limited | Education | 2024 |
| Hearth Consultancy Limited | Administrative & support | 2024 |
| Hearts Business Consultancy Ltd | Public administration | 2026 |
| Heathfield Grange Management Company Limited | Households | 2004 |
| Heddle Consulting Ltd | Administrative & support | 2015 |
| Hedges Carpentry Ltd | Manufacturing | 2025 |
| Hellyar Plastics Limited | Professional & scientific | 1982 |
| Henry Littlechild Ltd | Information & communication | 2008 |
| Herfster Ltd | Professional & scientific | 2025 |
| Heritage Listings Ltd | Wholesale & retail | 2020 |
| Herne Bay Counsellor Training Ltd | Education | 2017 |
| Herne Bay Locks Limited | Manufacturing | 2022 |
| Herne Bay Plastics Limited | Wholesale & retail | 2018 |
| Herne Bay Plumbing & Bathroom Supplies Limited | Wholesale & retail | 2013 |
| Herne Bay Trading Limited | Other services | 2011 |
| Heron Drums Ltd | Arts & recreation | 2018 |
| Hestian Property (Kent) Ltd | Real estate | 2019 |
| Hewitt Brothers Ltd | Transport & logistics | 2006 |
| Hewson Rentals Ltd | Hospitality | 2020 |
| HG Clinical Limited | Professional & scientific | 2024 |
| Hide and FOX Holdings Ltd | Hospitality | 2025 |
| Hide and FOX Ltd | Hospitality | 2019 |
| Highbourne Park Management Company Limited | Households | 1997 |
| Highcliffe Hall Freehold Limited | Households | 2018 |
| Highcliffe Hall Management Company Limited | Households | 2007 |
| Highfield Management Co. Limited | Households | 1974 |
| Highfield Mews (Willesborough) Management Limited | Real estate | 2007 |
| Highgate Drainage Ltd | Water & waste | 2017 |
| Highq Training Services Ltd | Information & communication | 2009 |
| Highspec Accountants Limited | Extraterritorial | 2019 |
| Highspec Consultancy Limited | Administrative & support | 2017 |
| Hightower Media Ltd | Professional & scientific | 2014 |
| Highview Accounts Limited | Professional & scientific | 2026 |
| Hills Holdings (Kent ) Ltd | Wholesale & retail | 2022 |
| Hills Home and Garden Ltd | Wholesale & retail | 2021 |
| Hillview Road (Whitstable) Management Company Limited | Households | 2024 |
| Himalayan Education Lifeline Programme Limited | Education | 2003 |
| Hinds-Site Limited | Construction | 2004 |
| Hively Limited | Information & communication | 2019 |
| Hj.Decor Ltd | Construction | 2020 |
| HJG Housing C.I.C. | Other services | 2022 |
| HK49 Ltd | Construction | 2022 |
| HK53 HMK Limited | Wholesale & retail | 2010 |
| HM Financial Services Ltd | Financial services | 2018 |
| Hmlp Construction Limited | Construction | 2024 |
| Hoka Electronics Ltd | Information & communication | 2020 |
| Hollis Rouse London Limited | Construction | 2021 |
| Home of the Dog Ltd | Hospitality | 2012 |
| Homeforce Design & Build Limited | Construction | 2019 |
| Homes Allday Ltd | Real estate | 2020 |
| Honeykanes Ltd | Wholesale & retail | 2024 |
| Hoot OWL Ltd | Hospitality | 2020 |
| Hoots Engineering Limited | Administrative & support | 2014 |
| Hope Within Counselling Service Limited | Health & social care | 2023 |
| Housden Medical Limited | Health & social care | 2020 |
| House of Hoyle Ltd | Wholesale & retail | 2026 |
| House of Thunder Ltd | Wholesale & retail | 2018 |
| Housing First Foundation | Other services | 2024 |
| Howard Financial Planning Limited | Financial services | 2017 |
| Howson Rail Limited | Professional & scientific | 2018 |
| HPS 2022 Ltd | Real estate | 2022 |
| HS91 Ltd | Real estate | 2019 |
| Hudson’S Smash & Brew Limited | Hospitality | 2023 |
| Hunsbury Spice Ltd | Hospitality | 2023 |
| Hurst Capital Ventures Limited | Real estate | 2008 |
| Hydrogard Group Limited | Administrative & support | 2016 |
| Hyped Agency Ltd | Professional & scientific | 2014 |
| Iamawakesorry Ltd | Information & communication | 2025 |
| IAN Barber & Associates Limited | Professional & scientific | 2004 |
| IBH Building Services Limited | Construction | 2003 |
| Ice Revived Ltd | Administrative & support | 2026 |
| Iceblack Limited | Real estate | 2006 |
| Ideal Getaway Limited | Real estate | 2024 |
| IF Interiors Ltd | Construction | 2024 |
| Igorotashi Ltd | Real estate | 2022 |
| IIC (UK) Limited | Wholesale & retail | 1998 |
| Imperial Social Care Limited | Health & social care | 2018 |
| IN Alignment Limited | Professional & scientific | 2015 |
| Inclusive Fitness Group Ltd | Arts & recreation | 2024 |
| Inclusive Sport Kent CIC | Education | 2019 |
| Inclusive Sport Ltd | Arts & recreation | 2018 |
| Inco Smartech Limited | Real estate | 2018 |
| Indigo Bay Marketing Limited | Professional & scientific | 2017 |
| Influence City Church | Health & social care | 2021 |
| Influx Media Ltd | Information & communication | 2021 |
| Ingard Independent Financial Management LLP | | 2006 |
| Ingham Mitchell Cooling Limited | Construction | 2014 |
| Ingredient Creative Limited | Information & communication | 2004 |
| Ingwood Parade Management Company Limited | Households | 2007 |
| Innovative Electrical Contractors Ltd | Construction | 2024 |
| Inspire ME Education Limited | Education | 2011 |