| GMK Limited | Professional & scientific | 2013 |
| GMS (Parking) Limited | Other services | 2010 |
| GMS Design Limited | Manufacturing | 2000 |
| GMS Parking Holdco Limited | Financial services | 2018 |
| Gmvd Clothing Ltd | Wholesale & retail | 2021 |
| Gnarly Consulting Limited | Information & communication | 2020 |
| GNE Unique Ventures Ltd | Transport & logistics | 2014 |
| Gnostica Limited | Information & communication | 2025 |
| GNR Professional Services Ltd | Education | 2025 |
| Go Assistive Technology Ltd | Manufacturing | 2022 |
| Go German London Ltd | Education | 2019 |
| Go Green Gardening Limited | Wholesale & retail | 2025 |
| GO4 Creations Limited | Real estate | 2022 |
| Godalming Specsavers Limited | Wholesale & retail | 2016 |
| Godswill Group Ltd | Financial services | 2026 |
| Godswill Recruitments Limited | Administrative & support | 2026 |
| Godswill Redevelopments Limited | Financial services | 2026 |
| Gold Car Wash (Fareham) Ltd | Administrative & support | 2025 |
| Gold Consult Ltd | Construction | 2020 |
| Gold Heron Limited | Professional & scientific | 2017 |
| Gold Lining Limited | Professional & scientific | 2019 |
| Gold Standard Driving Ltd | Wholesale & retail | 2023 |
| Goldcrest Lodge Ltd | Health & social care | 2024 |
| Golden Gecko Limited | Professional & scientific | 2020 |
| Golders Green Specsavers Limited | Wholesale & retail | 2009 |
| Golders Green Visionplus Limited | Wholesale & retail | 2009 |
| Goldsmith Financial Services Limited | Financial services | 2017 |
| Goldstone Accountants Limited | Professional & scientific | 2016 |
| Goliath Industrial Services Ltd | Construction | 2023 |
| Gomer Lane Property Limited | Administrative & support | 2010 |
| Gomibambi Ltd | Real estate | 2024 |
| Good Measure Carpentry and Construction Ltd | Manufacturing | 2020 |
| Goodenough Investments Ltd | Construction | 2023 |
| Goodfellers Limited | Agriculture & fishing | 2009 |
| Goodford Limited | Construction | 2004 |
| Goodmotorcompany Ltd | Wholesale & retail | 2026 |
| Goodvibes Designs Limited | Information & communication | 2011 |
| Goole Specsavers Limited | Wholesale & retail | 2001 |
| Goose Carpentry Limited | Construction | 2017 |
| Gorleston Specsavers Limited | Wholesale & retail | 2017 |
| Gorseinon Specsavers Limited | Wholesale & retail | 2003 |
| Gosport & Fareham Mechanics Ltd | Wholesale & retail | 2025 |
| Gosport Specsavers Limited | Wholesale & retail | 1995 |
| Gosport/Mill Road Management Limited | Households | 2022 |
| Goss (South) Limited | Administrative & support | 2009 |
| Gotn Ltd | Information & communication | 2025 |
| Goto Projects Ltd | Professional & scientific | 2024 |
| Govdash Systems Ltd | Information & communication | 2026 |
| Gower Cross Limited | Wholesale & retail | 2022 |
| Goysanaa Ltd | Wholesale & retail | 2026 |
| GP Driver Training Ltd | Education | 2024 |
| GP4LIFE Ltd | Health & social care | 2015 |
| GPB Strategies Ltd | Professional & scientific | 2025 |
| Gpinvest UK Real Estate Ltd | Financial services | 2020 |
| GPU Server Hosts Limited | Information & communication | 2025 |
| GR Skincare Ltd | Other services | 2023 |
| Graceley Wealth Limited | Financial services | 2023 |
| Gradwell Communications Limited | Information & communication | 1998 |
| Graffinx Ltd | Professional & scientific | 2025 |
| Grafton Engineering & Technical Services Limited | Professional & scientific | 2001 |
| Grafton Street Limited | Wholesale & retail | 2018 |
| Graham Roofing | | 1991 |
| Graham Russell Drums Ltd | Wholesale & retail | 2021 |
| Grameen Curry Ltd | Hospitality | 2019 |
| Grampian and the North Domi Audiology Specsavers Limited | Wholesale & retail | 2025 |
| Grand Driving Services Limited | Transport & logistics | 2018 |
| Grand Ocean View Management Company Limited | Households | 2007 |
| Grandad Prophire Ltd | Information & communication | 2024 |
| Grangemouth Specsavers Limited | Wholesale & retail | 2016 |
| Grant Associates (Chichester) Limited | Professional & scientific | 2009 |
| Grantham Specsavers Hearcare Limited | Wholesale & retail | 2010 |
| Grantham Specsavers Limited | Wholesale & retail | 1993 |
| Grantham Visionplus Limited | Wholesale & retail | 1993 |
| Grapefruit Recruitment Limited | Administrative & support | 2015 |
| Graphi Apparel Ltd | Wholesale & retail | 2020 |
| Gravesend Specsavers Hearcare Limited | Wholesale & retail | 2006 |
| Gravesend Specsavers Limited | Wholesale & retail | 1993 |
| Gravesend Visionplus Limited | Wholesale & retail | 1993 |
| Gray Area Consultancy Ltd | Administrative & support | 2025 |
| Gray's Group UK Ltd | Other services | 2023 |
| Grays Specsavers Limited | Wholesale & retail | 2003 |
| Graythorn Limited | Professional & scientific | 2011 |
| GRC Pathways Ltd | Information & communication | 2025 |
| Great Acorns Holdings Limited | Financial services | 2024 |
| Great Barn Weddings Limited | Arts & recreation | 2014 |
| Great Beginnings Ltd | Information & communication | 1997 |
| Great CUT UK Ltd | Other services | 2020 |
| Great Dunmow Specsavers Limited | Wholesale & retail | 2018 |
| Great Earth Energy Ltd | Professional & scientific | 2022 |
| Great Escape Clothing Limited | Professional & scientific | 2024 |
| Great Oak Care Homes Limited | Financial services | 2018 |
| Great White Pools Ltd | Construction | 2025 |
| Great Yarmouth Specsavers Hearcare Limited | Wholesale & retail | 2013 |
| Great Yarmouth Specsavers Limited | Wholesale & retail | 1993 |
| Great Yarmouth Visionplus Limited | Wholesale & retail | 1993 |
| Greatcord Limited | Real estate | 1990 |
| Greatforce Limited | Manufacturing | 2006 |
| Green Acres Childminding and Tutoring Ltd | Health & social care | 2023 |
| Green Care Health Solutions Ltd | Health & social care | 2022 |
| Green Coast Gardens Southern Ltd | Administrative & support | 2018 |