| Grimsby, Cleethorpes and District Dial-A-Ride | Transport & logistics | 1996 |
| Grms Roofing Limited | Construction | 2025 |
| Groovy Ruby Limited | Wholesale & retail | 2015 |
| Grosvenor Crescent Limited | Households | 1997 |
| Groundboss Limited | Administrative & support | 2005 |
| Grove Farm Liveries Ltd | Agriculture & fishing | 2022 |
| Grove Park Corner Catering Limited | Hospitality | 2011 |
| Grow With Propel Limited | Information & communication | 2022 |
| Growing Healthy Minds CIC | Hospitality | 2022 |
| Grubby Knees Ltd | Arts & recreation | 2020 |
| Grupo JK UK Limited | Wholesale & retail | 2008 |
| GRW Engineering Solutions Ltd | Professional & scientific | 2024 |
| GS Civils Ltd | Professional & scientific | 2007 |
| GS Joinery & Windows Limited | Construction | 2024 |
| GS Rigging & Lifting Ltd | Construction | 2019 |
| GSA Precision Engineering Limited | Professional & scientific | 2019 |
| GSB (Print & Design) Holdings Ltd | Manufacturing | 2022 |
| GSB Equity Solutions Limited | Professional & scientific | 2021 |
| GSD Wind Ltd | Construction | 2024 |
| GSK Humberston Ltd | Hospitality | 2025 |
| Gsky Properties Limited | Real estate | 2021 |
| GSP Brickwork Ltd | Construction | 2018 |
| GT Heating Ltd | Construction | 2022 |
| Gtech Training Consultancy Limited | Administrative & support | 2007 |
| GTP Home Improvements Ltd | Construction | 2013 |
| GTR Management Limited | Professional & scientific | 2017 |
| Guardian Risk Management Services Ltd | Professional & scientific | 2023 |
| Gundogsdirect Limited | Professional & scientific | 2022 |
| Gunnar Transport Ltd | Transport & logistics | 2024 |
| Guthrie Engineering South West Ltd | Construction | 2021 |
| GWP Realisations 2024 Limited | Manufacturing | 1990 |
| GY 122 Ltd | Hospitality | 2023 |
| GY Cars Limited | Wholesale & retail | 2011 |
| GY CUE Master Snooker Ltd | Education | 2025 |
| GY Developments Limited | Real estate | 2014 |
| GY Enterprises Ltd | Administrative & support | 2019 |
| GY Holdings Ltd | Financial services | 2023 |
| GY Rave Entertainment Ltd | Hospitality | 2025 |
| GY Sunblinds Limited | Manufacturing | 2012 |
| Gymfront Ltd | Information & communication | 2026 |
| Gymversus Limited | Wholesale & retail | 2009 |
| H & a Glover Limited | Construction | 2004 |
| H & D Electrical Limited | Construction | 2019 |
| H & I Access Limited | Construction | 2026 |
| H and R Hart Ltd | Hospitality | 2023 |
| H Attrill Commissioning Ltd | Professional & scientific | 2018 |
| H Cope & Sons (Holdings) Limited | Extraterritorial | 2009 |
| H F Refrigeration Ltd | Manufacturing | 2008 |
| H F Young Properties Limited | Real estate | 1950 |
| H G a T Investments Limited | Real estate | 2022 |
| H I Electrical Solutions Limited | Construction | 2019 |
| H J C Property Services Limited | Construction | 2003 |
| H J T Investments Limited | Real estate | 2022 |
| H Japp Decoration Ltd | Construction | 2015 |
| H Lawton (Rope Access) Ltd | Construction | 2019 |
| H Parker Medical Limited | Health & social care | 2022 |
| H R Hudson Limited | Administrative & support | 2007 |
| H V Accountancy Limited | Professional & scientific | 2009 |
| H&J Holdings (Lincs) Ltd | Extraterritorial | 2024 |
| H&Mv Consultants Ltd | Energy | 2024 |
| H&S - GAS Safety Services Ltd | Construction | 2021 |
| H&S Catering Limited | Hospitality | 2025 |
| H&T Practice Limited | Financial services | 2025 |
| H. Cope & Sons Limited | Water & waste | 1996 |
| H. Poole Limited | Wholesale & retail | 1941 |
| H.L.C Plastering Ltd | Construction | 2013 |
| H2 Dropship Ltd | Wholesale & retail | 2026 |
| HA Technical Solutions Ltd | Construction | 2025 |
| Haagensen Wardrobes & Kitchens Limited | Construction | 2010 |
| Habayo Limited | Health & social care | 2024 |
| Habit HQ Ltd | Hospitality | 2025 |
| Habitat Networks Ltd | Professional & scientific | 2018 |
| Haggai IT Limited | Wholesale & retail | 2017 |
| Hague Group Services Ltd | Financial services | 2022 |
| Hague Renewable Services Ltd | Construction | 2025 |
| Haile Engineering Solutions Ltd | Professional & scientific | 2020 |
| Hainton Recreation Club Limited | Hospitality | 1944 |
| Hainton Slice Ltd | Hospitality | 2024 |
| Hair a UK Ltd | Other services | 2018 |
| Hair B UK Limited | Other services | 2009 |
| Hair Beautiful Limited | Other services | 2014 |
| Hair by Andrea Ltd | Other services | 2020 |
| Hairworxuk Ltd | Other services | 2014 |
| Haiths Heating Limited | Construction | 2022 |
| Halcyone Finance Limited | Professional & scientific | 2023 |
| Hall Infrastructure Design Limited | Professional & scientific | 2009 |
| Hall Management Solutions Ltd | Professional & scientific | 2020 |
| Hall Wood Forest Developments Ltd | Construction | 2019 |
| Hall-Med Ltd | Health & social care | 2022 |
| Haller Properties Limited | Real estate | 2013 |
| Hamed Medical Ltd | Health & social care | 2023 |
| Hamill's Home Improvements Ltd | Construction | 2022 |
| Hammond House Ltd | Education | 2016 |
| Hammond House Productions Ltd | Arts & recreation | 2023 |
| Hammond House Publishing Ltd | Information & communication | 2016 |
| Hammond Services Ltd | Administrative & support | 2017 |
| Hancock & Sons (Menswear) Limited | Wholesale & retail | 2003 |
| Handcock Holdings Limited | Professional & scientific | 2025 |
| Handtrans Express Limited | Transport & logistics | 2025 |
| Hannah Stuffin Ltd | Extraterritorial | 2024 |