| Geoffrey James Properties Limited | Real estate | 2020 |
| Geoffrey James Reproductions Limited | Wholesale & retail | 2025 |
| Geomatic Solutions Ltd. | Professional & scientific | 2020 |
| Geona Romano Construction Limited | Construction | 2022 |
| George and Dragon Quainton Ltd | Hospitality | 2023 |
| George David & Co. Limited | Real estate | 1991 |
| George Rose Developments Ltd | Construction | 2017 |
| Gerald LOW & Company Ltd | Construction | 2011 |
| German Drive Ltd | Wholesale & retail | 2024 |
| GET Digital Fit Ltd | Information & communication | 2024 |
| GET Groomed Ltd. | Other services | 2017 |
| GET Ready Limited | Professional & scientific | 2020 |
| Getmyparcel Ltd | Transport & logistics | 2022 |
| GF Lift Traction Limited | Other services | 2024 |
| GG Cucos Ltd | Hospitality | 2024 |
| GGJ Group Ltd | Real estate | 2023 |
| GGK Tech Ltd | Information & communication | 2016 |
| Gi-Ges Aylesbury Ltd | Hospitality | 2017 |
| Gibbs Holdings Limited | Real estate | 1982 |
| Gibson Mortgages Ltd | Financial services | 2024 |
| Gibstone Limited | Financial services | 2004 |
| Gideon Consulting Limited | Information & communication | 2007 |
| Giftag Limited | Wholesale & retail | 2021 |
| Gifted & Resourceful People Limited | Administrative & support | 2005 |
| Giftimized Gifts Limited | Wholesale & retail | 2019 |
| Giggle & Grow Childcare Services Ltd | Education | 2026 |
| Gihon Limited | Administrative & support | 2006 |
| Gill Concrete Limited | Manufacturing | 2025 |
| Ginger Cat Bakery Limited | Manufacturing | 2014 |
| Ginger Jack Barber Limited | Other services | 2026 |
| Gingerkoiki Studio Ltd | Professional & scientific | 2022 |
| GJ Construction Services Ltd | Construction | 2025 |
| GJ Cubed Ltd | Information & communication | 2014 |
| GKAS2 Limited | Hospitality | 2024 |
| Gkcooling Solutions Ltd | Energy | 2017 |
| GL Renewables Ltd | Professional & scientific | 2014 |
| GL2 Logistics Ltd | Information & communication | 2023 |
| Glacier Communications Limited | Information & communication | 2013 |
| Gladiator Building Products Ltd | Construction | 2015 |
| Glanmire Design & Build Limited | Construction | 2023 |
| Glass and Granite Company Limited | Manufacturing | 2010 |
| Glawes Consulting Ltd | Construction | 2025 |
| Glazing World (UK) Limited | Construction | 2012 |
| Gledhow Ltd | Information & communication | 2018 |
| Glen Tinton Retail Consultancy Limited | Professional & scientific | 2008 |
| Glendening Property Limited | Real estate | 2026 |
| Glenn Law Limited | Financial services | 2008 |
| Glenvar Properties Ltd | Real estate | 2016 |
| Gliswood Ltd | Wholesale & retail | 2016 |
| Glitch Analytics Ltd | Professional & scientific | 2025 |
| Global Agri Innovations Ltd. | Education | 2014 |
| Global Cabs UK Ltd | Transport & logistics | 2022 |
| Global Edtech Ltd | Information & communication | 2021 |
| Global Food Supplies Ltd | Wholesale & retail | 2018 |
| Global M'Ckarm International Care Services Limited | Public administration | 2022 |
| Global Majestic Creations Ltd | Real estate | 2025 |
| Global Media Consultants Ltd | Information & communication | 2026 |
| Global Online Mapps Ltd | Information & communication | 2015 |
| Global Vehicle Hub Ltd | Wholesale & retail | 2022 |
| Global WGS Consulting Limited | Professional & scientific | 2013 |
| Global Wholesale Tyre Ltd | Wholesale & retail | 2025 |
| Global World Trading Co Limited | Wholesale & retail | 2018 |
| Globe Care Solutions Limited | Administrative & support | 2017 |
| Globejotter Ltd | Manufacturing | 2020 |
| Glofa Ltd | Health & social care | 2022 |
| Gloramp Pharma Consulting Limited | Professional & scientific | 2014 |
| Glorious Handz Cleaning Services Ltd | Administrative & support | 2025 |
| Glow UP by Jodie Elleanor Ltd | Other services | 2022 |
| Glowee Ltd | Professional & scientific | 2020 |
| Glowing Care Ltd | Health & social care | 2020 |
| Glowing Smiles Ltd | Health & social care | 2025 |
| GLS Velo Ltd | Wholesale & retail | 2024 |
| Gluon Limited | Information & communication | 2014 |
| Gluten Free Goodies Limited | Wholesale & retail | 2010 |
| GLX Productions Ltd | Administrative & support | 2016 |
| GM Electrical London Ltd | Construction | 2022 |
| GM Estetica Ltd | Health & social care | 2021 |
| GM FLO Ltd | Transport & logistics | 2022 |
| GMC Category Services Ltd | Professional & scientific | 2014 |
| GMF Designs Limited | Administrative & support | 2014 |
| GMH Cash Registers Limited | Information & communication | 2013 |
| GMK Software Solutions Limited | Information & communication | 2015 |
| Gmsp Limited | Construction | 2015 |
| GMW Studio Ltd | Professional & scientific | 2026 |
| Gnius Communications Limited | Professional & scientific | 1999 |
| Go Greek Food Limited | Hospitality | 2017 |
| Go Viral Ltd | Professional & scientific | 2025 |
| Gobbler Ltd | Manufacturing | 2010 |
| Gobuydirect Ltd | Wholesale & retail | 2025 |
| Godden Clinical Solutions Ltd | Education | 2021 |
| Godny Ltd | Transport & logistics | 2015 |
| Gogidas Carpentry Ltd | Construction | 2025 |
| Gohil International Procurement Services Ltd | Wholesale & retail | 2016 |
| Gold Chain of Events Limited | Administrative & support | 2024 |
| Gold Top Limited | Hospitality | 1959 |
| Golden Goat Productions Ltd | Information & communication | 2024 |
| Goldenview Caravan Park Limited | Hospitality | 2024 |
| Goldfield Projects Consultancy Ltd | Professional & scientific | 2024 |
| Goldfinger by Mariposa Limited | Construction | 2010 |
| Goldline Assets Limited | Transport & logistics | 2002 |