| Graylaw International Freight Group Limited | Transport & logistics | 1986 |
| Graylaw Properties Holdings Ltd | Professional & scientific | 2019 |
| Graylaw Properties Limited | Professional & scientific | 2019 |
| Graylaw Warehousing Limited | Transport & logistics | 2013 |
| Green Asset Holdings Limited | Financial services | 2023 |
| Green Creative Solutions Ltd | Professional & scientific | 2026 |
| Greenhey Industrial & Marine Engineering Limited | Manufacturing | 1990 |
| Greenhey Industrial Insulation Ltd | Construction | 1992 |
| Greenhoard Ltd | Manufacturing | 2010 |
| Greywood Investments Limited | Real estate | 2016 |
| Grieve Developments Ltd | Construction | 2025 |
| Griffiths Enforcement Ltd | Administrative & support | 2016 |
| Grimwood Precision Services Ltd | Professional & scientific | 2024 |
| Ground Zero Measured Surveys Ltd | Professional & scientific | 2025 |
| GS and AK Properties Investment Ltd | Households | 2023 |
| Guardian Roofing Contractors Limited | Construction | 2025 |
| Guidance & Care Ltd | Health & social care | 2024 |
| Gusto Energy Limited | Manufacturing | 2021 |
| Gwen Llachar Limited | Health & social care | 2013 |
| Gymshop Ltd | Wholesale & retail | 2024 |
| H & L Contracts Ltd | Extraterritorial | 2009 |
| H & R Body Repairs Car & Commercial Ltd | Wholesale & retail | 2025 |
| H&N Property Maintenance Ltd | Construction | 2025 |
| H.E.M.E. International Limited | Manufacturing | 2006 |
| Haarslev UK Limited | Manufacturing | 2005 |
| Hamerkop Solutions Ltd | Administrative & support | 2022 |
| Handley James Consulting Limited | Administrative & support | 2015 |
| Handley James Properties Limited | Real estate | 2024 |
| HANDYMAN4YOU Ltd | Construction | 2026 |
| Hannah Food Services Limited | Extraterritorial | 2002 |
| Hannah Holdings Limited | Financial services | 2002 |
| Hannah Taylor Ltd | Health & social care | 2025 |
| Hansby Green Limited | Households | 2021 |
| Happy Days Learning Kitchen CIC | Education | 2022 |
| Hardman Electrical Contractors Ltd | Extraterritorial | 2026 |
| Hare & Levitt Limited | Construction | 2004 |
| Haroby (Holdings) Limited | Administrative & support | 2018 |
| Haroby RGP Limited | Wholesale & retail | 1994 |
| Harrington Publishing House Ltd | Health & social care | 2022 |
| Hart & Co (Windows & Doors) Ltd | Manufacturing | 1987 |
| Hasshann Holdings Limited | Financial services | 2018 |
| Hasshann Limited | Wholesale & retail | 2009 |
| Hawthorn UB Ltd | Wholesale & retail | 2017 |
| Hcfc Commercial Services Limited | Professional & scientific | 2025 |
| Headssup Community Interest Company | Education | 2019 |
| Helen Fisher Limited | Professional & scientific | 2012 |
| Hermes Corporation Ltd. | Professional & scientific | 2018 |
| HFA Solutions Ltd | Professional & scientific | 2014 |
| Highmeadow Consulting Ltd | Professional & scientific | 2021 |
| Hilian Engineering Ltd | Manufacturing | 2023 |
| Hills Properties Limited | Construction | 2017 |
| Hire E Sameday Ltd | Transport & logistics | 2025 |
| Hirst Business Services Limited | Transport & logistics | 2017 |
| HJM Supplies Ltd | Wholesale & retail | 2022 |
| Hjmamz Ltd | Wholesale & retail | 2023 |
| HLR Trans Ltd | Transport & logistics | 2016 |
| Holland Moor Extended Services | Education | 2008 |
| Holoquent Limited | Extraterritorial | 2003 |
| Holstens UK Property Ltd | Real estate | 2016 |
| Holstens UK Trading Ltd | Wholesale & retail | 2016 |
| Hooter Car Wash Skelmersdale Ltd | Administrative & support | 2024 |
| Hope House Project Ltd | Wholesale & retail | 2005 |
| Hope's Heart Therapy & Training CIC | Health & social care | 2026 |
| Hope's Therapy Dogs Ltd | Health & social care | 2025 |
| Horizon Breaks Ltd | Hospitality | 2023 |
| Horseshoe Inn | | 2009 |
| Hotter Holdings Limited | Professional & scientific | 2007 |
| Houghwood Construction Ltd | Construction | 2020 |
| Hoult Group Services Limited | Manufacturing | 2019 |
| House Home Heaven Limited | Real estate | 2024 |
| House of Hathor Limited | Wholesale & retail | 2016 |
| Hoys Homes Ltd | Real estate | 2025 |
| HPH 2022 Limited | Financial services | 2022 |
| HR Kilns Holdings Ltd | Financial services | 2026 |
| HR Kilns Ltd | Manufacturing | 2005 |
| Hristov 2019 Ltd | Transport & logistics | 2019 |
| HS GRP Moulding Ltd | Manufacturing | 2023 |
| HST Consulting Limited | Administrative & support | 2018 |
| HT Winds Limited | Information & communication | 2026 |
| Hungarian Food Wholesale UK Ltd | Wholesale & retail | 2019 |
| Huyton Plumbing and Heating Limited | Construction | 1987 |
| Huyton Plumbing Investments Limited | Professional & scientific | 2009 |
| HWL Automotive Ltd | Wholesale & retail | 2025 |
| HWS Data Services Limited | Information & communication | 2025 |
| Hygiene Supplies UK Ltd | Wholesale & retail | 2017 |
| I C Rail Ltd | Construction | 2014 |
| I ME Mine Limited | Administrative & support | 2025 |
| I.T.C. (Groundworks and Civil Engineering) Limited | Construction | 1987 |
| IAN Niblock DIP Support & Consultancy Ltd | Manufacturing | 2022 |
| IBK Global Ltd | Wholesale & retail | 2025 |
| ICE2U Ltd | Manufacturing | 2016 |
| Iconic Soccer Performance Limited | Arts & recreation | 2021 |
| IEB Homes Ltd | Real estate | 2023 |
| IF Statements Ltd | Information & communication | 2024 |
| Ihempcbd Ltd | Health & social care | 2021 |
| Ilmars Ltd | Transport & logistics | 2021 |
| ILT Developments Ltd | Other services | 2022 |
| Imago Training Ltd | Education | 2015 |
| IMI Rider Ltd | Transport & logistics | 2019 |
| Imperial Kitchen Skelmersdale Ltd | Hospitality | 2024 |