| GB Sweets Ltd | Hospitality | 2026 |
| GC Consulting 2023 Limited | Administrative & support | 2023 |
| GCR Construction Midlands Ltd | Construction | 2022 |
| GD Elite Performance Ltd | Health & social care | 2026 |
| Gearshift Technologies Ltd | Administrative & support | 2021 |
| Gelsmoor Inns Limited | Hospitality | 2007 |
| Gerritforge Ltd | Information & communication | 2009 |
| Gestalt Networks Ltd | Information & communication | 2013 |
| GET This NOW Ltd | Wholesale & retail | 2025 |
| GHA Salon Ltd | Other services | 2024 |
| Ghadiali Enterprises Ltd | Financial services | 2017 |
| Ghadiali Investments Ltd | Financial services | 2018 |
| Gino's Ristorante Ltd | Hospitality | 2008 |
| Glen House Capital Strategies Ltd | Financial services | 2002 |
| Glenveagh Advisory Limited | Professional & scientific | 2024 |
| Global Futures Collective Ltd | Education | 2023 |
| Global Sport and Education Summit Limited | Arts & recreation | 2025 |
| Goldbridge Limited | Real estate | 1964 |
| Goldfinch Developments & Property Services Ltd. | Construction | 2016 |
| Golf Icons Ltd | Arts & recreation | 2026 |
| Golfingdays Limited | Administrative & support | 2006 |
| Gooding Aluminium Limited | Manufacturing | 1979 |
| Gory Detail Limited | Information & communication | 2012 |
| Gosh Golly Limited | Administrative & support | 2010 |
| Grace Dieu Financial Solutions Ltd | Financial services | 2011 |
| Gratitude Financial Planning Limited | Financial services | 2021 |
| Graysar Holdings Ltd | Financial services | 2025 |
| Great Northern (CWB) Limited | Hospitality | 2017 |
| Great Northern (Friar Lane) Limited | Hospitality | 2016 |
| Great Northern (Newark) Limited | Hospitality | 2018 |
| Great Northern (Trent Navigation) Limited | Hospitality | 2019 |
| Great Northern Bars Ltd | Hospitality | 2014 |
| Grech Drawing Management Limited | Construction | 1999 |
| Greedy Foods Distribution Ltd | Hospitality | 2025 |
| Green Acorn Property Investments Ltd | Real estate | 2018 |
| Green Circle NB Limited | Professional & scientific | 2018 |
| Green Leaps Ltd | Wholesale & retail | 2020 |
| Greygates Ltd | Construction | 2015 |
| Greyway Limited | Wholesale & retail | 1992 |
| GRH Management Limited | Professional & scientific | 2017 |
| Groby Automatics Limited | Manufacturing | 1958 |
| Grwn Group Limited | Agriculture & fishing | 2022 |
| Gupta Holdings Ltd | Financial services | 2017 |
| Gupta Investments Ltd | Financial services | 2017 |
| Gwph Consulting Limited | Professional & scientific | 2013 |
| H & L Marble Limited | Manufacturing | 1991 |
| H&H Professional Services Ltd | Professional & scientific | 2015 |
| Haho Homes Limited | Real estate | 2022 |
| Haidon Projects Limited | Financial services | 2009 |
| Hall & Co Accountants Limited | Administrative & support | 2011 |
| Hamilton House (Southampton ROW) Management Limited | Other services | 2011 |
| Hamilton House Property Limited | Other services | 2011 |
| Hammerhead Homes Ltd. | Construction | 2018 |
| Harbour and Shore Clinical Services Limited | Public administration | 2026 |
| Harbour Bay Consulting Limited | Administrative & support | 2012 |
| Harbourtech Limited | Real estate | 2019 |
| Harley Aesthetics Ltd | Health & social care | 2015 |
| Harrington & Jessup Limited | Manufacturing | 1977 |
| Harrington Generators International Limited | Manufacturing | 1987 |
| Harshi Limited | Information & communication | 2014 |
| Harvist Associates Limited | Public administration | 2012 |
| Haseley Medical-Legal Services Ltd | Administrative & support | 2017 |
| Hashtaghairandbeauty Ltd | Other services | 2018 |
| Hawk Racing Limited | Arts & recreation | 2016 |
| Hazlewood Locksmiths Limited | Other services | 2012 |
| HCA Educational Services Limited | Education | 2013 |
| HCG Engineering Ltd | Manufacturing | 2016 |
| Hdsn Ltd | Financial services | 2018 |
| Hdsn Properties Ltd | Real estate | 2018 |
| Heckin Pawfect Ltd | Wholesale & retail | 2023 |
| Helen Shaw Consultancies Limited | Other services | 2012 |
| Helen Sisson Ltd | Professional & scientific | 2025 |
| Helen Ward Pro Hygiene Limited | Health & social care | 2025 |
| Henderson Planning & Design Ltd | Professional & scientific | 2025 |
| HFC Clearance Ltd | Transport & logistics | 2025 |
| Highgate Roofing (UK) Limited | Construction | 2014 |
| Highproc IT Consultancy Ltd | Information & communication | 2019 |
| Hill House (Ashby) Ltd | Households | 2019 |
| Hill House Homes Ashby Ltd | Real estate | 2024 |
| Hilltop Aesthetics Ltd | Health & social care | 2026 |
| Hilltops (Staunton) Limited | Real estate | 2013 |
| HKD Law Limited | Professional & scientific | 2015 |
| Hlin Safety Ltd | Arts & recreation | 2025 |
| Hocaps Limited | Administrative & support | 1995 |
| Hochoys Limited | Wholesale & retail | 2000 |
| Hockley Investments Limited | Real estate | 2022 |
| Hoffmann Green Cement UK Limited | Wholesale & retail | 2024 |
| Hola Spanish Ltd | Education | 2018 |
| Holiday Activities for Kids Limited | Arts & recreation | 2015 |
| Holly T Services Limited | Wholesale & retail | 2024 |
| Hollymead Consulting Limited | Administrative & support | 2017 |
| Holman Homes Limited | Households | 2016 |
| Holme Tree Ltd | Manufacturing | 2000 |
| Holmetree Investments Limited | Administrative & support | 2012 |
| Homework Limited | Manufacturing | 2022 |
| Hopkinson Media Ltd | Information & communication | 2018 |
| Hoseforma Investments Limited | Financial services | 2019 |
| Hoseforma Staging Limited | Manufacturing | 2019 |
| Howlett and Company Limited | Information & communication | 2012 |
| HPM Media Ltd | Professional & scientific | 2021 |