| Gurkha Canterbury Limited | Professional & scientific | 2025 |
| Guston Orchard Property Limited | Real estate | 2020 |
| Guzman Ltd | Professional & scientific | 2025 |
| GW Financial Solutions Limited | Professional & scientific | 2007 |
| GW Health Fitness Limited | Arts & recreation | 2024 |
| GW Renovations Ltd | Construction | 2018 |
| Gwsw Holdings UK Ltd | Real estate | 2026 |
| Gwsw UK Ltd | Construction | 2026 |
| GYG Pharma Solutions Ltd | Extraterritorial | 2023 |
| Gylphi Limited | Information & communication | 2007 |
| Gypsy Court Consulting Ltd | Information & communication | 1997 |
| H & Moss Consultancy Ltd | Professional & scientific | 2019 |
| H J P R Limited | Real estate | 2002 |
| H Noble Funeral Directors Ltd | Other services | 2011 |
| H&G Medical Ltd | Health & social care | 2025 |
| H.Mount & Sons Limited | Agriculture & fishing | 1946 |
| H.R.Higgins(Coffee-Man)Limited | Wholesale & retail | 1948 |
| H2 Global Trading Ltd | Agriculture & fishing | 2024 |
| Haad Goods Ltd | Wholesale & retail | 2023 |
| Haase Ltd | Health & social care | 2023 |
| Habibi Estates Limited | Households | 2022 |
| Habibi Homes Limited | Real estate | 2021 |
| Habitat Vert Ltd | Real estate | 2019 |
| Hackington Developments Limited | Construction | 2020 |
| Hagfire Pottery Ltd | Manufacturing | 2025 |
| Hala Gallery Limited | Wholesale & retail | 2023 |
| Halagen Limited | Professional & scientific | 2005 |
| Half a String | Information & communication | 2022 |
| Half Breed Ltd | Information & communication | 2018 |
| Half Moon and Seven Stars Limited | Hospitality | 2015 |
| Halil-Jr &Co Ltd | Real estate | 2025 |
| Hallmark Workwear & Safety Limited | Extraterritorial | 2021 |
| Halo Property Corporation Limited | Real estate | 2025 |
| Halsion Holdings Limited | Professional & scientific | 2001 |
| Halsion Limited | Construction | 1996 |
| Halston Ventures Ltd | Information & communication | 2020 |
| Hamilton Homeware Ltd | Extraterritorial | 2024 |
| Hammer and Nails Construction Limited | Construction | 2017 |
| Hammered Labs Ltd | Manufacturing | 2017 |
| Hammerton Entertainment Ltd | Other services | 2011 |
| Hammerton Holdings Limited | Other services | 2025 |
| Hammill Park Management Company Limited | Real estate | 2015 |
| Hammill Properties Limited | Construction | 2011 |
| Hampson Investments Ltd | Administrative & support | 2008 |
| Handsome Mansion Ltd | Administrative & support | 2021 |
| Handsomely Ltd | Information & communication | 2022 |
| Handy Eddy Property Refurbishment and Mantainance Ltd | Construction | 2024 |
| Happy & Glorious Ltd | Wholesale & retail | 2022 |
| Happy AJK Ltd | Hospitality | 2024 |
| Happy Homes Property Investment Ltd | Real estate | 2019 |
| Happy Owls Ltd | Education | 2021 |
| Happy Samurai Products Ltd | Hospitality | 2019 |
| Happy Sundaes Limited | Hospitality | 2026 |
| Harbour Point Management Co (Participants) Ltd | Extraterritorial | 2015 |
| Harbour Point Management Co. Limited | Extraterritorial | 1990 |
| Harbridge Lanford Limited | Real estate | 2023 |
| Hardwood Limited | Professional & scientific | 1997 |
| Hardys (Canterbury) Limited | Extraterritorial | 2012 |
| Hardys Kent Limited | Wholesale & retail | 2021 |
| Hare Park Farm Holdings Limited | Administrative & support | 2022 |
| Hareotoko Ventures Limited | Financial services | 2023 |
| Hariimpex Ltd | Information & communication | 2024 |
| Harling Drive Limited | Households | 2018 |
| Harmonate Limited | Real estate | 2018 |
| Harper Cafe Ltd | Hospitality | 2023 |
| Harrington Hill Ltd | Professional & scientific | 2024 |
| Harris Decorating Services Ltd | Construction | 2022 |
| Harrowfield Holdings Ltd | Construction | 2025 |
| Harsh Beats Ltd | Information & communication | 2021 |
| Harsh Live Ltd | Information & communication | 2021 |
| Hart Fintech Consultants Ltd | Professional & scientific | 2025 |
| Hart LEE Tree Surgery Ltd | Agriculture & fishing | 2014 |
| Hartley Developments South East Ltd | Construction | 2021 |
| Harverine Limited | Extraterritorial | 2006 |
| Harvest Court Management Limited | Households | 2003 |
| Harvey Richards & West Sales Limited | Real estate | 2011 |
| Harvey's Carpentry & Joinery Ltd | Construction | 2016 |
| Harveys Horticultural Services Limited | Administrative & support | 2023 |
| Harvis Painters & Property Services Ltd | Construction | 2025 |
| Harwood Building Control Limited | Administrative & support | 2005 |
| Harwood Construction Consultancy Services Limited | Administrative & support | 2007 |
| Harwood Construction Ltd | Administrative & support | 2016 |
| Haslam Ltd | Hospitality | 2020 |
| Hasse Health Limited | Information & communication | 2024 |
| Hassells Accountancy Limited | Professional & scientific | 2024 |
| Hatter Properties 21 Ltd | Real estate | 2025 |
| Hatter Properties Ltd | Real estate | 2018 |
| Hatty's Entertainment Ltd | Arts & recreation | 2024 |
| Haus Architects Ltd | Construction | 2019 |
| Havelock Place Residents Co. Limited | Households | 1988 |
| Haven Design Services Limited | Professional & scientific | 1984 |
| Haven Hall Limited | Real estate | 2025 |
| Haven Nook Ltd | Education | 2021 |
| Havering Aggregates Limited | Mining & quarrying | 1997 |
| Havini Ltd | Wholesale & retail | 2026 |
| Hawkins Research Ltd | Professional & scientific | 2017 |
| Hawley 23 RTM Company Limited | Households | 2022 |
| Hawtrey Dene Group Ltd | Professional & scientific | 2017 |
| Hayes Property Developments Limited | Construction | 2012 |
| Hayward Design & Print Limited | Manufacturing | 2010 |