| Growth Core UK Ltd | Information & communication | 2020 |
| Growth Hacking Today Ltd | Professional & scientific | 2018 |
| Growth School Limited | Information & communication | 2024 |
| GS Casa Ltd | Construction | 2015 |
| GS Entertainment Management Limited | Arts & recreation | 2019 |
| GS Goalkeeping Academy Ltd | Education | 2025 |
| GS Interiors and Maintenance Limited | Construction | 2015 |
| GS Therapist Ltd | Health & social care | 2021 |
| Gselec Ltd | Construction | 2018 |
| GSH67 Limited | Professional & scientific | 2017 |
| Gshah Lettings Limited | Real estate | 2024 |
| Gskitservices Ltd | Information & communication | 2024 |
| Gspann Technologies (UK) Limited | Information & communication | 2012 |
| GT FHM Limited | Real estate | 2020 |
| GT33 Empire Ltd | Real estate | 2021 |
| GTC Solutions Ltd | Construction | 2020 |
| GTO Construction Ltd | Construction | 2026 |
| GU15 Investments Ltd | Financial services | 2026 |
| GU25 Investments Limited | Real estate | 2019 |
| Guardforce Security Services Limited | Administrative & support | 1993 |
| Gubhaju & Sons Limited | Real estate | 2024 |
| Guilaran Services Limited | Health & social care | 2023 |
| Guild Educational Services Limited | Education | 2022 |
| Guinness Chambers Limited | Other services | 2015 |
| Guli Therapy Limited | Health & social care | 2024 |
| Gunatit Holdings Ltd | Real estate | 2020 |
| GUNATIT369 PVT Ltd | Wholesale & retail | 2024 |
| Gurfauj Holdings Ltd | Real estate | 2025 |
| Gurjar Trading Ltd | Wholesale & retail | 2023 |
| Gurjas Ltd | Health & social care | 2014 |
| Gurkha Beverage Limited | Wholesale & retail | 2023 |
| Gurram Properties Limited | Real estate | 2022 |
| Guru Kripa Fintech Ltd | Information & communication | 2021 |
| Guru Krupa Ltd | Wholesale & retail | 2013 |
| Gurumart Limited | Wholesale & retail | 2025 |
| Gurus of Data Ltd | Information & communication | 2026 |
| Gustacom Ltd | Information & communication | 2021 |
| GUT Food Ferment Ltd | Manufacturing | 2025 |
| Guthrie and Co Ltd | Wholesale & retail | 2023 |
| Gutter Done Right Ltd | Administrative & support | 2024 |
| Gutter Repairs Ltd | Construction | 2016 |
| Guttering Repairs Ltd | Construction | 2010 |
| Gutu Construction Ltd | Construction | 2009 |
| GUV 29 Taywood Road RTM Company Ltd | Households | 2022 |
| GUV Caldon & Ashby & Welford House RTM Company Ltd | Households | 2022 |
| GUV Hertford & WEY & Middlewich House RTM Company Ltd | Households | 2022 |
| GUV Regent House RTM Company Ltd | Households | 2022 |
| GV Automation & Controls Ltd | Information & communication | 2022 |
| GV Consultancy UK Ltd | Health & social care | 2009 |
| Gwent Cables Limited | Manufacturing | 2006 |
| Gwgp Limited | Real estate | 2022 |
| GWR Plant Hire Limited | Extraterritorial | 2019 |
| GWR Properties & Investments Limited | Real estate | 2013 |
| Gyanny Cleanners Ltd | Administrative & support | 2024 |
| Gynaecare Centre Ltd | Health & social care | 2023 |
| Gynx Technologies Ltd | Information & communication | 2026 |
| H & C Construction Company Limited | Construction | 1989 |
| H & G Grooming Limited | Other services | 2017 |
| H & J Merchants Ltd | Construction | 2018 |
| H & J Property Ventures Ltd | Real estate | 2020 |
| H & J Retail Limited | Wholesale & retail | 2015 |
| H & R Interiors Ltd | Administrative & support | 2016 |
| H & SO Ltd | Administrative & support | 2020 |
| H and C Building Services Limited | Construction | 2022 |
| H B Services Intl Ltd | Professional & scientific | 2010 |
| H D Desai & Co Ltd | Financial services | 2025 |
| H Entertainments Ltd | Hospitality | 2012 |
| H G Findlay Ltd | Construction | 2018 |
| H G Winfield Limited | Wholesale & retail | 2010 |
| H Justin Limited | Professional & scientific | 2017 |
| H P Jones Brickwork Limited | Construction | 2020 |
| H Properties Limited | Hospitality | 2012 |
| H S Windows(Uk) Ltd | Manufacturing | 2024 |
| H Singh Limited | Professional & scientific | 2012 |
| H Supplies Ltd | Other services | 2019 |
| H Technology Ltd | Information & communication | 2017 |
| H W F Number Two Hundred and SIX Limited | Real estate | 1992 |
| H&F Nexus Limited | Wholesale & retail | 2025 |
| H&H Beauty Hub Limited | Wholesale & retail | 2025 |
| H&H Dog Training Limited | Administrative & support | 2012 |
| H&H Process Engineers Limited | Professional & scientific | 2008 |
| H&H Traders Ltd | Wholesale & retail | 2026 |
| H&J Design and Build Ltd | Construction | 2015 |
| H&R Travel Ltd | Transport & logistics | 2022 |
| H. S. Bahra & Sons Limited | Wholesale & retail | 2022 |
| H.I Distributions Ltd | Wholesale & retail | 2023 |
| H.T.Howard & Company Limited | Manufacturing | 1946 |
| H.V.C. Properties Limited | Construction | 1986 |
| H.Y. Trade 25 Ltd | Wholesale & retail | 2025 |
| H2O Transport & Logistics Ltd | Transport & logistics | 2026 |
| H3 Property Development Ltd | Real estate | 2023 |
| H4TM4N Renewables Ltd | Wholesale & retail | 2020 |
| HA7 Projects Ltd | Construction | 2026 |
| HAB Consultancy Ltd | Health & social care | 2025 |
| HAB9 Ltd | Construction | 2024 |
| Haber Advisory Limited | Professional & scientific | 2024 |
| Habitat RG01 Limited | Construction | 2025 |
| Habitat SG01 Limited | Real estate | 2025 |
| Habitat Ventures Hub Ltd | Construction | 2024 |
| Habits Studios Limited | Manufacturing | 2017 |