| Granta Network Solutions Ltd | Other services | 2013 |
| Great Minds Don'T Ltd | Professional & scientific | 2023 |
| Greek House Souvlaki Ltd | Hospitality | 2023 |
| Green Bear Group Ltd | Other services | 2019 |
| Green END 1965 Limited | Extraterritorial | 2014 |
| Green Energy Banbury Limited | Construction | 2019 |
| Green Light Autos Limited | Wholesale & retail | 2011 |
| Green Planet Forest School Ltd | Education | 2023 |
| Green Solar Systems Ltd | Construction | 2023 |
| Green Trees (Bucks) Ltd | Other services | 2022 |
| Green Trees Autos (Bucks) Ltd | Wholesale & retail | 2025 |
| Greenleaves Development Limited | Real estate | 1997 |
| Greenlight Supported Living and Care Services Limited | Health & social care | 2023 |
| Greenwich College of Education Ltd | Extraterritorial | 2019 |
| Gregory Heating Services Limited | Construction | 2025 |
| Grendon Garage Limited | Agriculture & fishing | 2002 |
| Greyhat Tech Limited | Information & communication | 2010 |
| Greystag Fire and Security Limited | Administrative & support | 2010 |
| Grimditch Consulting Ltd | Professional & scientific | 2024 |
| Grip Clip Ltd | Manufacturing | 2025 |
| Grovebury Estate Limited | Real estate | 1986 |
| Grovedun Limited | Real estate | 2015 |
| GTC Engineering (Silverstone) Ltd | Manufacturing | 2006 |
| Guku Limited | Professional & scientific | 2012 |
| Gwms 2003 Ltd | Financial services | 2003 |
| H&G Lawrence Family Holdings Limited | Financial services | 2026 |
| H&H Equestrian Ltd | Arts & recreation | 2015 |
| Haeman Couriers Ltd | Transport & logistics | 2018 |
| Hair @ 22 Buckingham Limited | Other services | 2019 |
| Hair by Ugur Ltd | Other services | 2020 |
| Hamdi 100 Ltd | Hospitality | 2023 |
| Hamilton Takeaway Limited | Hospitality | 2024 |
| Harbinger Bradford Developments Ltd | Real estate | 2022 |
| Harbinger Custodian Self Storage Holdings Limited | Real estate | 2018 |
| Harbinger Development Holdings Ltd | Real estate | 2021 |
| Harbinger Developments Ltd | Construction | 2012 |
| Harbinger DMS Ltd | Real estate | 2022 |
| Harbinger Group Holdings Limited | Professional & scientific | 2018 |
| Harbinger Peterborough Developments Ltd. | Real estate | 2022 |
| Harbinger Self Storage Asset Management Limited | Real estate | 2016 |
| Harbinger Self Storage Bradford Limited | Real estate | 2017 |
| Harbinger Self Storage Rotherham Limited | Real estate | 2017 |
| Harbinger Storage Developments (NR 1) Ltd | Real estate | 2022 |
| Harbour Club Events Ltd | Administrative & support | 2015 |
| Harcham Ltd | Extraterritorial | 2023 |
| Harcris Cyber Consultancy Ltd | Information & communication | 2017 |
| Harmondsworth Group Limited | Real estate | 2008 |
| Harque Limited | Information & communication | 2011 |
| Hartle Bryggen Ltd | Education | 2025 |
| Hartmann (UK) Limited | Manufacturing | 1962 |
| Harvest Moon Barn Ltd | Real estate | 2018 |
| Harwood Security &Training Consultancy Ltd | Professional & scientific | 2013 |
| HAT Couture Limited | Manufacturing | 2021 |
| Hatton Services Ltd | Professional & scientific | 2017 |
| Have I GOT Brews for YOU 3 Ltd | Wholesale & retail | 2026 |
| HAY Williams Roberts Limited | Information & communication | 2018 |
| Haysom Finance Limited | Financial services | 2021 |
| Haysom International Limited | Wholesale & retail | 2016 |
| Haysom Land Limited | Construction | 2021 |
| Hayward-Dale Ventures Ltd | Hospitality | 2023 |
| Hazchem Safety Ltd | Manufacturing | 2012 |
| HBH Retail Ltd | Wholesale & retail | 2024 |
| Hddl Limited | Real estate | 2021 |
| HDM Legal Limited | Professional & scientific | 2022 |
| Hdmm Limited | Health & social care | 2013 |
| Healius Ltd | Wholesale & retail | 2023 |
| Health Fusion Ltd | Wholesale & retail | 2024 |
| Healthygreenz Ltd | Agriculture & fishing | 2025 |
| Hearthstead Co Ltd | Wholesale & retail | 2022 |
| Heat Pump Installs Ltd | Energy | 2019 |
| Heath Home Improvements Limited | Construction | 2024 |
| Heliodore Limited | Construction | 2016 |
| Helionex Ltd | Information & communication | 2026 |
| Helps Building and Landscaping Limited | Construction | 2018 |
| Henceitech Ltd | Information & communication | 2026 |
| Hennigan Building & Civil Engineering Ltd | Construction | 1997 |
| Hennigan Holdings Limited | Administrative & support | 2014 |
| Hennigan Investments Limited | Real estate | 2013 |
| Hennigan Properties Ltd | Real estate | 2018 |
| Hennton Homes Limited | Real estate | 2021 |
| Hephaistos Limited | Information & communication | 2017 |
| Herbert White & Sons Limited | Agriculture & fishing | 2013 |
| Hexon Planning Consultants Limited | Professional & scientific | 2011 |
| HFW Aesthetics Ltd | Other services | 2014 |
| High Grade Supplies Limited | Hospitality | 2017 |
| Highton CEM Services Ltd. | Construction | 2012 |
| Highton Developments Limited | Construction | 2006 |
| Hill Cottage Industries Limited | Real estate | 2003 |
| Hill Farmhouse Ltd | Health & social care | 2012 |
| Hill House Consultancy Ltd | Professional & scientific | 2024 |
| Hinton Skydiving Centre Limited | Arts & recreation | 2000 |
| Hodgson Wright Advisory Ltd | Professional & scientific | 2018 |
| Hogshaw Farm & Wildlife Park Ltd | Wholesale & retail | 2019 |
| Holden Project Services Ltd | Professional & scientific | 2020 |
| Holiday in Alps Limited | Administrative & support | 2007 |
| Holla Consultancy Limited | Professional & scientific | 2025 |
| Holland North Ltd | Real estate | 2016 |
| Holyport Central Garage Ltd | Wholesale & retail | 2019 |
| Home Alone Insulation Services Ltd | Construction | 2025 |
| Home Angels 2023 Ltd | Health & social care | 2023 |