| Gdpr Enterprises Ltd | Real estate | 2020 |
| Gdpr Investments Ltd | Real estate | 2020 |
| Gdpr Management Ltd | Real estate | 2024 |
| Gechar Consultants Ltd | Professional & scientific | 2026 |
| Gemini IT Solutions Limited | Information & communication | 2022 |
| Geneen Consulting Limited | Professional & scientific | 2020 |
| General System Industries Limited | Professional & scientific | 2020 |
| Genx Network Ltd | Information & communication | 2014 |
| GEO Construction Limited | Construction | 2010 |
| Geon Limited | Information & communication | 2009 |
| George Bromfield Associates Limited | Construction | 2009 |
| George Restall Ltd | Professional & scientific | 2019 |
| Gerard Thurrock Ltd | Construction | 2022 |
| GET Ace Services Ltd | Arts & recreation | 2024 |
| Getbooked. Software Limited | Information & communication | 2026 |
| Giant Ruby Limited | Information & communication | 2025 |
| Gigga Developments Limited | Construction | 2019 |
| Gilbert Property Development Ltd | Construction | 2025 |
| Gilberts of Great Missenden Ltd | Transport & logistics | 2026 |
| Giles Accounting Services Limited | Professional & scientific | 2003 |
| Giles Coaching Ltd | Professional & scientific | 2020 |
| GJG (India) Limited | Professional & scientific | 2018 |
| GJJ Entertainment Limited | Health & social care | 2025 |
| Gkomb Ltd | Wholesale & retail | 2020 |
| GKR Solutions Limited | Information & communication | 2016 |
| Glasswick Limited | Real estate | 1999 |
| Glasszone Limited | Wholesale & retail | 2001 |
| Gleam Globe Ltd | Health & social care | 2016 |
| Glenlyon Real Estate Limited | Real estate | 2020 |
| GLO Management Consultancy Ltd | Professional & scientific | 2024 |
| Global Workforce Management UK Ltd | Information & communication | 2024 |
| GLS Electrical Limited | Construction | 2002 |
| GM Consultancy Limited | Professional & scientific | 2022 |
| GM Montgomery Ltd | Professional & scientific | 2022 |
| Gmdo Group Ltd | Professional & scientific | 2026 |
| GMV Freight Limited | Wholesale & retail | 2018 |
| Godolphin Minerals Limited | Financial services | 2019 |
| Godolphin Mining (UK) Limited | Mining & quarrying | 2014 |
| Godwitcare Global Ltd | Health & social care | 2026 |
| Gogol Developers Limited | Construction | 2017 |
| Golby Accounting Services Limited | Extraterritorial | 2008 |
| Goldn Co Ltd | Wholesale & retail | 2025 |
| Golton Properties Limited | Real estate | 2020 |
| Good Intentions Ltd | Professional & scientific | 2022 |
| GOOD2GO Brickwork Limited | Construction | 2015 |
| GOOD2GO Property Group Ltd | Real estate | 2021 |
| Goode Measure Ltd | Professional & scientific | 2025 |
| Goodlowe Limited | Professional & scientific | 2019 |
| Goodman FOX Limited | Information & communication | 2014 |
| Goodwood Interiors Limited | Manufacturing | 2013 |
| Goodyer 4 X 4 Ltd | Wholesale & retail | 2017 |
| Gough Contractors Limited | Construction | 2002 |
| Gower and Wark Limited | Professional & scientific | 2025 |
| GPN Enterprises Ltd | Real estate | 2020 |
| Gracefield Legacy Group Ltd | Construction | 2025 |
| Grand View Container Trading (UK) Ltd | Wholesale & retail | 2000 |
| Grandknack Limited | Manufacturing | 1986 |
| Grant Scott Property Limited | Real estate | 2020 |
| Grantham Curry POT Ltd | Hospitality | 2022 |
| Gras Capital Ltd | Real estate | 2023 |
| Grass and Holm Limited | Professional & scientific | 2015 |
| Grateful Insights Limited | Professional & scientific | 2024 |
| GRC Transformation Limited | Professional & scientific | 2011 |
| Greenfield Creative Services Limited | Professional & scientific | 2018 |
| Greenford Glass Services Ltd | Construction | 2010 |
| Gregory Towers Ltd | Real estate | 2025 |
| Greym Consulting Limited | Transport & logistics | 2017 |
| Griffin Carpentry Ltd | Construction | 2025 |
| Griffinot Ltd | Health & social care | 2010 |
| Groundwater Modelling Limited | Professional & scientific | 2018 |
| Grove Projects Ltd | Health & social care | 2021 |
| GSI Contract Services Limited | Construction | 2005 |
| GSI Fire Protection Limited | Construction | 2018 |
| GT Advisors & Consulting Ltd | Professional & scientific | 2020 |
| Guck Entertainment Ltd | Arts & recreation | 2024 |
| Gulia Housing Ltd | Real estate | 2023 |
| Gunley Companies Ltd | Professional & scientific | 2025 |
| Gunley Contracts Ltd | Professional & scientific | 2025 |
| Guruji Property Investments UK Ltd | Financial services | 2023 |
| GUY Hearn Photography Limited | Professional & scientific | 2004 |
| Gwelmor Limited | Hospitality | 2025 |
| GX Clinic Ltd | Health & social care | 2026 |
| H R Architectural Consultants Ltd | Professional & scientific | 2012 |
| H&H Bros Ltd | Extraterritorial | 2019 |
| HA Jenkins Ltd | Real estate | 2018 |
| Hadleymount Limited | Construction | 1996 |
| Hair by Charlotte Hayes Ltd | Other services | 2018 |
| Halawa Surgical Consultancy Limited | Health & social care | 2025 |
| Hall Place Holdings Ltd | Real estate | 2018 |
| Hall's Executive Edge Limited | Professional & scientific | 2019 |
| Hallie’S Aesthetics Ltd | Other services | 2025 |
| Halls Business Services Ltd | Information & communication | 2024 |
| Halma Australasia Holdings Limited | Professional & scientific | 2020 |
| Halma Euro Trading Limited | Professional & scientific | 2009 |
| Halma Financing Limited | Professional & scientific | 2004 |
| Halma International Limited | Professional & scientific | 1975 |
| Halma Investment Holdings Limited | Professional & scientific | 2004 |
| Halma Overseas Funding Limited | Professional & scientific | 2008 |
| Halma Public Limited Company | Professional & scientific | 1894 |
| Halma Resistors Unlimited | Professional & scientific | 2005 |