| Gadget Waltham Cross Ltd | Wholesale & retail | 2018 |
| Gaga Ltd | Real estate | 2023 |
| Gaia Resourcing Limited | Administrative & support | 2021 |
| Gainage Ltd | Manufacturing | 2015 |
| Galgal Developments Ltd | Construction | 2007 |
| Gallions Limited | Construction | 2007 |
| Galloway Stud Limited | Agriculture & fishing | 2021 |
| Gallus Properties Limited | Real estate | 1987 |
| Gama Global Trading Ltd | Wholesale & retail | 2018 |
| Gamedo Investments Ltd | Financial services | 2019 |
| Gannon Contracts Limited | Construction | 2013 |
| GAP4U Regruitment Limited | Administrative & support | 2025 |
| Garden Fruit & VEG Limited | Wholesale & retail | 2025 |
| Gardmark Ltd | Real estate | 2019 |
| Gardo Doors Limited | Wholesale & retail | 2014 |
| Gareth Mutema Ltd | Professional & scientific | 2023 |
| Gareth Williams Hair Limited | Education | 2021 |
| Gareth Williams Hair Services Limited | Other services | 2023 |
| Gary Chilcott Consulting Limited | Administrative & support | 2011 |
| Gary J Thomas Limited | Construction | 2015 |
| GAS ARC Group Limited | Manufacturing | 1981 |
| GAS Flow and Plumbing Ltd | Construction | 2014 |
| Gasdec Properties Limited | Real estate | 2022 |
| Gatekeeper Meadow (Watton at Stone) Management Company Ltd | Households | 2012 |
| Gave Limited | Hospitality | 2025 |
| Gavrigod Properties Ltd | Real estate | 2018 |
| Gaya Cosmetics Limited | Wholesale & retail | 2014 |
| Gazioglu Family Holdings Ltd | Financial services | 2025 |
| GB 242 Limited | Wholesale & retail | 2016 |
| GB Best Trade Ltd | Wholesale & retail | 2018 |
| GB Fame Ltd | Manufacturing | 2011 |
| GB Renovations Holdings Ltd | Construction | 2026 |
| Gb-Build Ltd | Other services | 2013 |
| GBP Products Ltd | Wholesale & retail | 2025 |
| GCH Chirowodza Ltd | Wholesale & retail | 2019 |
| Gear Construction UK Limited | Construction | 2020 |
| Gecko Decor Ltd | Wholesale & retail | 2020 |
| Gemilang Ltd | Hospitality | 2017 |
| Genc Catering Services Ltd | Hospitality | 2025 |
| Genelia UK Limited | Real estate | 2020 |
| Generaer Limited | Construction | 2025 |
| Generations Multi Academy Trust | Education | 2011 |
| Genial Property Limited | Construction | 2017 |
| Geniustech Software and Systems Ltd | Information & communication | 2019 |
| Genyx Media Ltd | Information & communication | 2025 |
| Geoma Investments Limited | Real estate | 2024 |
| George Lily Finance Ltd | Financial services | 2023 |
| George Valley (UK) Ltd | Financial services | 2015 |
| George Valley Property Ltd | Real estate | 2022 |
| Georgievi Ltd | Construction | 2018 |
| Georgin Investment Services Limited | Administrative & support | 2014 |
| Gess Limited | Real estate | 2024 |
| GET Fit With AF Ltd | Other services | 2021 |
| GET IT 2GETHER CIC | Hospitality | 2024 |
| GET Liquid Ltd | Professional & scientific | 2026 |
| GET Plumbing & Heating Supplies Limited | Wholesale & retail | 2024 |
| GET UP and Move! TV Ltd | Arts & recreation | 2007 |
| GET Visual Group Ltd | Financial services | 2025 |
| Getaway Cleaning Limited | Administrative & support | 2025 |
| Getting Digital Ltd | Information & communication | 2020 |
| Gfaab Limited | Wholesale & retail | 2025 |
| GG Media Limited | Professional & scientific | 2026 |
| GG-889-192 Limited | Real estate | 2022 |
| GH Events Ltd | Manufacturing | 2022 |
| GHD Group Limited | Wholesale & retail | 2025 |
| GHK Residence Ltd | Real estate | 2022 |
| GIA & EVA Limited | Real estate | 2011 |
| GIB Property Investment Limited | Real estate | 2016 |
| Gift Tree Limited | Wholesale & retail | 2011 |
| Gillani & Co Limited | Extraterritorial | 2009 |
| Gilly Pet Supplies Ltd | Wholesale & retail | 2019 |
| Giuseppe’S Food Ltd | Hospitality | 2025 |
| GJE Limited | Health & social care | 2025 |
| Gjm.Advisory Ltd | Professional & scientific | 2026 |
| GL Futures Ltd | Information & communication | 2026 |
| Gladdryline Ltd | Construction | 2025 |
| Glamour Styles Services Ltd | Wholesale & retail | 2021 |
| Glantz Properties Ltd | Real estate | 2025 |
| Glenmead House Ltd | Real estate | 2018 |
| Glhi Ltd | Construction | 2023 |
| Global Food Package Limited | Extraterritorial | 2012 |
| Global Foodland Ltd | Wholesale & retail | 2022 |
| Global Product Services Ltd | Other services | 2024 |
| Globe Mansions Management Limited | Real estate | 2012 |
| Glocare Contract Services Ltd | Health & social care | 2023 |
| Glohome Cleaning Limited | Administrative & support | 2025 |
| Glorwell Ltd | Wholesale & retail | 2013 |
| Glowgreen Gardens & Landscape Ltd | Administrative & support | 2026 |
| Glowing Beauty and Aesthetics Ltd | Other services | 2023 |
| Glowsync AI Ltd | Information & communication | 2025 |
| GLR Hygiene Ltd | Manufacturing | 2025 |
| GM Ndegwa Limited | Health & social care | 2024 |
| GM Rose Property Ltd | Real estate | 2024 |
| GM Tools Hire Ltd | Other services | 2016 |
| Gmci Investments Limited | Administrative & support | 2022 |
| Gmck Estates Ltd | Real estate | 2020 |
| GMS SPV Investment Limited | Real estate | 2026 |
| GN Consulting Solutions Limited | Professional & scientific | 2007 |
| GN Orchard Limited | Real estate | 2025 |
| GN Properties Ltd | Real estate | 2007 |