| Good Harvest Properties (Reigate) Limited | Real estate | 2003 |
| Good Harvest Properties (Thatcham Two) Limited | Real estate | 2004 |
| Good Intent Media Ltd | Information & communication | 2023 |
| Goodbrand Removals Ltd | Transport & logistics | 2026 |
| Goodies Primrose Hill Limited | Other services | 2019 |
| Goojop Ltd | Administrative & support | 2023 |
| Gopal Kanda Limited | Wholesale & retail | 2025 |
| Gopharm Ltd | Financial services | 2025 |
| Goradia Ltd | Administrative & support | 2025 |
| Goreja Properties Limited | Real estate | 2017 |
| Goroots Limited | Agriculture & fishing | 2006 |
| Goswell Road Islington Limited | Real estate | 2006 |
| Gottago Ltd | Information & communication | 2023 |
| Govinda Stores Limited | Wholesale & retail | 2007 |
| Gower Street Life Ltd | Hospitality | 2024 |
| GQR Ltd | Health & social care | 2025 |
| GR Hewitt Rigging Limited | Construction | 2023 |
| GR Solutions Limited | Administrative & support | 1998 |
| Grace & Grey Property Service Limited | Other services | 2022 |
| Grace UK Property Limited | Real estate | 2021 |
| Gradex IT Limited | Administrative & support | 2016 |
| Grand Auto Specialists Ltd | Wholesale & retail | 2025 |
| Grand Golf & Resort Limited | Other services | 2026 |
| Grandville Trading Limited | Wholesale & retail | 2020 |
| Grange Park House Ltd | Professional & scientific | 2014 |
| Grangemere Properties Limited | Real estate | 2009 |
| Grangepharm Ltd | Financial services | 2021 |
| Granite Management Company Limited | Real estate | 2023 |
| Grapefruit Solutions Limited | Professional & scientific | 2024 |
| Gravema Limited | Hospitality | 2017 |
| GRC Software Limited | Information & communication | 2021 |
| Great Business Solutions Ltd | Professional & scientific | 2016 |
| Great Joy Limited | Hospitality | 2019 |
| Great to BEE Home Limited | Real estate | 2019 |
| Great Wine Estates Limited | Extraterritorial | 2017 |
| Greater Healing Ltd | Health & social care | 2024 |
| Greek Fellas Limited | Hospitality | 2023 |
| Green Assessors Ltd | Professional & scientific | 2013 |
| Green Berry Plumbers Limited | Construction | 2024 |
| Green Door 54 Limited | Administrative & support | 2018 |
| Green END Development Limited | Construction | 2023 |
| Green END Residential Limited | Construction | 2024 |
| Green Home Energy (Private) Limited | Professional & scientific | 2016 |
| Green Lane (Pinner) Company Limited | Professional & scientific | 1999 |
| Green Picket Fence Limited | Information & communication | 2022 |
| Green Pillar Limited | Real estate | 2023 |
| Green Property Developers Ltd | Construction | 2017 |
| Green ST Pharmaceuticals Limited | Administrative & support | 2014 |
| Green Valley Relief Foundation Ltd | Education | 2012 |
| Greenbuddha Holdings Limited | Extraterritorial | 2000 |
| Greenbuddha Records Ltd | Extraterritorial | 2000 |
| Greenhill Ventures Ltd | Real estate | 2016 |
| Greenland Consulting Limited | Information & communication | 2010 |
| Greenland Engineering Limited | Information & communication | 2016 |
| Greentricity Limited | Administrative & support | 2011 |
| Greentricity UK LLP | | 2012 |
| Greenwater Finance and Investment Co Limited | Real estate | 1995 |
| Greenwave Global Limited | Professional & scientific | 2008 |
| Greenwave Media Limited | Administrative & support | 2010 |
| Greg Mcmanus Associates Ltd | Professional & scientific | 2016 |
| Grenville Court (Chorleywood) Company Limited | Households | 1996 |
| Greyark Productions Limited | Information & communication | 2026 |
| Greybox IT Solutions Limited | Information & communication | 2021 |
| Groovylens Limited | Extraterritorial | 2020 |
| Grosvenor Fine Arts Limited | Wholesale & retail | 2001 |
| Grosvenor Gardens Holiday Lets Limited | Hospitality | 2013 |
| Grounded Property Group Limited | Hospitality | 2020 |
| Grounded Property Investment LLP | | 2020 |
| Groundtel Limited | Other services | 2001 |
| Group Soteria Limited | Professional & scientific | 2025 |
| Grove Orchard Management Company Limited | Administrative & support | 1996 |
| Grovehall 2016 Limited | Real estate | 2016 |
| Growing Greatness Ltd | Education | 2023 |
| Growmore Healthcare Ltd | Wholesale & retail | 2026 |
| Growth Hub Global Limited | Professional & scientific | 2016 |
| Grumpy Dragon Ltd | Information & communication | 2023 |
| Grumpy Ferret Limited | Information & communication | 2010 |
| Gryphon Industrial Park (Porters Wood) Management Company Limited | Households | 1998 |
| GS Movers Limited | Transport & logistics | 2024 |
| GS Public Relations Ltd | Administrative & support | 2005 |
| GS Tech Limited | Information & communication | 2023 |
| GSB Property Limited | Real estate | 2017 |
| GSD Estate Agents Limited | Real estate | 2008 |
| GSD Property Management Limited | Real estate | 2012 |
| GTS Fire Ltd | Construction | 2014 |
| GU Tech Ltd | Information & communication | 2014 |
| GU21 Leases Limited | Real estate | 2024 |
| Gucaai Ltd | Information & communication | 2011 |
| Guild Assist Limited | Administrative & support | 2018 |
| Guild Corporate Services Group Limited | Administrative & support | 2004 |
| Guild Freelancing Limited | Administrative & support | 2016 |
| Guildhub Consulting Ltd | Administrative & support | 2021 |
| Gujarati Arts & Drama Limited | Arts & recreation | 2006 |
| Gulbahar HAQ Limited | Health & social care | 2023 |
| Gulf Pacific Resources Limited | Professional & scientific | 2015 |
| Guna NUA Ltd | Wholesale & retail | 2025 |
| Guner Developments Limited | Real estate | 2018 |
| Guner Property Co. Limited | Real estate | 2016 |
| Guner Savoy Limited | Real estate | 2019 |
| Guru Gobind Property Holdings Ltd | Real estate | 2023 |