| Handei Ltd | Real estate | 2018 |
| Handiwork Games Limited | Information & communication | 2019 |
| Hands to Paws Ltd | Other services | 2023 |
| Handsome Barbers Ltd | Other services | 2019 |
| Handy BAG Limited | Administrative & support | 2005 |
| Handy Crew Services Ltd | Information & communication | 2010 |
| Handy Pro Solutions Limited | Construction | 2025 |
| Handy Squad (Kent) Ltd | Construction | 2026 |
| Hanington Limited | Real estate | 1988 |
| Hankmarvingroup Ltd | Hospitality | 2024 |
| Hannah Group Limited | Financial services | 2018 |
| Hannah MEP Ltd | Construction | 2018 |
| Hannington James Ltd | Real estate | 2024 |
| Hanoove Limited | Information & communication | 2014 |
| Hanover House Properties Limited | Construction | 2005 |
| Hanys Homes Ltd | Construction | 2017 |
| Happy Endeavours Limited | Professional & scientific | 2023 |
| Happy Robot Limited | Information & communication | 2012 |
| Happypine Publication Ltd | Information & communication | 2019 |
| Harbour & Shoal Limited | Hospitality | 2025 |
| Harbour Health Club Limited | Arts & recreation | 2013 |
| Hardwicke House Limited | Households | 2002 |
| Hardy House Limited | Extraterritorial | 2006 |
| Hardy Nelson Ltd | Professional & scientific | 2011 |
| Hargreaves Bennett Limited | Professional & scientific | 2020 |
| Hargreaves Heritage Ltd | Administrative & support | 2024 |
| Harlesden Hosts Ltd | Hospitality | 2023 |
| Harmony Accountancy (Kent) Limited | Professional & scientific | 2007 |
| Harold Nwaboku Ltd | Health & social care | 2012 |
| Harriet's Domestic Services Limited | Professional & scientific | 2018 |
| Harrington Stud Limited | Agriculture & fishing | 2025 |
| Harrisburg Construction Limited | Construction | 2015 |
| Harrison (Kent) Limited | Construction | 2020 |
| Harrisons Hair Team Limited | Other services | 2010 |
| Harrisons Prep Services Ltd | Administrative & support | 2024 |
| Harry Investments Ltd | Financial services | 2024 |
| Harry Jordan Ltd | Construction | 2025 |
| Harson Homes Limited | Construction | 2022 |
| Hart Browne and Curtis Limited | Professional & scientific | 1975 |
| Hartnup Consulting Limited | Professional & scientific | 2015 |
| Hartnup Investments Limited | Professional & scientific | 2015 |
| Harvey & Bacon Limited | Construction | 2010 |
| Harvey Sutton Limited | Administrative & support | 2016 |
| Haselden Scaffolding Services Ltd | Construction | 2026 |
| HASHI3 Ltd | Professional & scientific | 2023 |
| Hashtag Hair and Beauty Brentford Limited | Other services | 2020 |
| Hashtag Press Ltd | Information & communication | 2016 |
| HAT With BOW Ltd | Arts & recreation | 2018 |
| Hatch Engineering Limited | Construction | 2007 |
| Hatch Park LLP | | 2012 |
| Hatton Construction Limited | Construction | 2024 |
| Haunted Fish Tank Limited | Information & communication | 2000 |
| Havard Developments Ltd | Construction | 2022 |
| Havenbridge Homes Ltd | Real estate | 2024 |
| Havilah Medicals and Consulting Services UK Limited | Health & social care | 2018 |
| Hawk-Woods Limited | Manufacturing | 1991 |
| Hawkes Close Management Limited | Households | 2024 |
| Hawkes Design & Decor Ltd | Construction | 2023 |
| Hawkhurst (Kent House) Limited | Households | 1992 |
| Hawkins Vehicle Technician Ltd | Wholesale & retail | 2017 |
| Hawthorn & Kent Ltd | Professional & scientific | 2024 |
| Hawthorn Carriage Company Limited | Hospitality | 2026 |
| Hawthorn Court (Ashford) Limited | Households | 2005 |
| Hawthorn Residential Home Limited | Health & social care | 2004 |
| Haycott Properties Ltd | Real estate | 2017 |
| Hayes Shutter & Shopfront Limited | Construction | 2018 |
| Hayman Executive Limited | Administrative & support | 2014 |
| Hayter QS Limited | Professional & scientific | 2026 |
| Hayward Homes Ltd | Professional & scientific | 2024 |
| Hayward's Building and Contractors Limited | Construction | 2017 |
| Haywood Electrical South Ltd | Construction | 2025 |
| Hazel Tree Estates Ltd | Real estate | 2024 |
| Hazelden Holdings Limited | Financial services | 2025 |
| Hazeldene Contracts Limited | Real estate | 1997 |
| Hazledine Consultancy Limited | Professional & scientific | 2017 |
| HB Oak Frames Limited | Construction | 2019 |
| HB Oak Limited | Construction | 2023 |
| HB Woolpack Ltd | Hospitality | 2024 |
| HBS22 Ltd | Information & communication | 2023 |
| Hbta Ltd | Other services | 2016 |
| HBW Property Investment Ltd | Real estate | 2023 |
| HC Earley Limited | Financial services | 2024 |
| HCL MOT & Bodyshop Limited | Wholesale & retail | 2025 |
| Hcnn Properties Ltd | Real estate | 2025 |
| Hcnn Services Ltd | Construction | 2024 |
| HD Coffee Ltd | Hospitality | 2021 |
| HD Hockey Limited | Wholesale & retail | 2016 |
| HDB Building & Restoration Ltd | Construction | 2025 |
| HDU Holdings Limited | Financial services | 2023 |
| Head 2 TOE Therapies Kent Limited | Health & social care | 2016 |
| Head Start Digital Consultancy Ltd | Information & communication | 2024 |
| Headcorn Charcoal Grill Ltd | Hospitality | 2018 |
| Headcorn Gifts and Music Limited | Wholesale & retail | 2012 |
| Headcorn Pharma Limited | Wholesale & retail | 2025 |
| Headcorn Podiatry Limited | Health & social care | 2016 |
| Headcorn Special Events Limited | Arts & recreation | 2005 |
| Headley Court Management Company Limited | Other services | 1986 |
| Headquarters of Tankerton Ltd | Other services | 2012 |
| Heads UP HR Ltd | Professional & scientific | 2020 |
| Headways Limited | Professional & scientific | 1998 |