| Grid Stability Limited | Professional & scientific | 2025 |
| Gridbridge Ltd | Wholesale & retail | 2025 |
| Gridfoilman Ltd | Manufacturing | 2019 |
| Gridfy Ltd | Manufacturing | 2025 |
| Gridiron & Gravy Ltd | Wholesale & retail | 2018 |
| Gridlines Group Ltd | Financial services | 2017 |
| Gridy Technology Ltd | Information & communication | 2024 |
| Griff Marketing Ltd | Administrative & support | 2019 |
| Griff Payroll Ltd | Administrative & support | 2019 |
| Griffin & Sloane Ltd | Wholesale & retail | 2025 |
| Griffin and Bell Education Ltd | Education | 2011 |
| Griffin Battery Centre Ltd | Wholesale & retail | 2021 |
| Griffin Bidco Limited | Administrative & support | 2009 |
| Griffin Chat Ltd | Information & communication | 2016 |
| Griffin Dental Partnership Limited | Health & social care | 2010 |
| Griffin Estates (North West) Limited | Real estate | 2010 |
| Griffin Family Investment Limited | Financial services | 2018 |
| Griffin Global Group Limited | Administrative & support | 2003 |
| Griffin Global Holdco Limited | Administrative & support | 2009 |
| Griffin Lettings Limited | Real estate | 2012 |
| Griffin Marine Travel Limited | Administrative & support | 1978 |
| Griffin Medicals Limited | Information & communication | 2016 |
| Griffin Optical Limited | Health & social care | 2022 |
| Griffinlane Carwash Ltd | Other services | 2025 |
| Griffinlane Hand Carwash Aylesbury Ltd | Other services | 2024 |
| Griffith Electrical Services and Consulting Engineers Ltd | Professional & scientific | 2012 |
| Griffiths Homes Ltd | Real estate | 2024 |
| Griffiths Park Land Limited | Real estate | 2004 |
| Grigorios Kyriazis Urology Care Limited | Health & social care | 2024 |
| Grihakon Ltd | Real estate | 2023 |
| Griher Khoje Limited | Real estate | 2024 |
| Griliopoulos Independent Trading Services Limited | Administrative & support | 1996 |
| Grill Boss Ltd | Hospitality | 2025 |
| Grill Food & Dessert Ltd | Hospitality | 2024 |
| Grill HUT Catering Ltd | Hospitality | 2020 |
| Grill Seekers Ltd | Hospitality | 2025 |
| Grill Sweets Limited | Hospitality | 2023 |
| Grille, Diffuser & Louvre Co. Limited(The) | Water & waste | 1980 |
| Grillers Desserts Ltd | Hospitality | 2020 |
| Grillerzz Ltd | Hospitality | 2021 |
| Grillio Ltd | Wholesale & retail | 2019 |
| Grime Scene Cleanup Limited | Administrative & support | 2025 |
| Grimetime Construction Ltd | Construction | 2019 |
| Grimley Estates Limited | Real estate | 2011 |
| Grimsby LP | | 2022 |
| Grimshaw Lane Ltd | Real estate | 2025 |
| Grimshaw Management Limited | Real estate | 2021 |
| Grind and Point Ltd | Construction | 2022 |
| Grinning Goblet Wines Limited | Wholesale & retail | 2016 |
| Grinsdale Ltd | Administrative & support | 2022 |
| Grip Adventure CIC | Administrative & support | 2024 |
| Grip Cartel Limited | Administrative & support | 2022 |
| Grip Flip Ltd | Wholesale & retail | 2025 |
| Gription Ltd | Information & communication | 2018 |
| Grisdale Consulting Limited | Professional & scientific | 2022 |
| Grisdalf Limited | Administrative & support | 2016 |
| Grisedale Contractors Limited | Administrative & support | 2002 |
| Grish Logistics Ltd | Transport & logistics | 2025 |
| Grisio Crop Stress Resistance Laboratory Co., Limited | Mining & quarrying | 2025 |
| Grit and Grind Coffee Limited | Hospitality | 2024 |
| Grivon Elite Security Ltd | Hospitality | 2025 |
| Griyoh Ltd | Information & communication | 2026 |
| GRL Auto-Motives Ltd | Wholesale & retail | 2025 |
| GRM Capital Ltd | Administrative & support | 2013 |
| Grmj Properties Limited | Real estate | 2015 |
| Grmnt Ltd | Wholesale & retail | 2018 |
| Grnata Star Trading Company Ltd | Wholesale & retail | 2026 |
| Groby Road Developments Ltd | Construction | 2020 |
| Grocerly Go Limited | Wholesale & retail | 2020 |
| Grocery Local Shop Ltd | Wholesale & retail | 2025 |
| Groco (Holdings) Limited | Construction | 2024 |
| Groenacres Investment Limited | Real estate | 2020 |
| Grognet & Walch Ltd | Other services | 2022 |
| Grolar Developments Limited | Real estate | 2017 |
| Gromak Limited | Health & social care | 2018 |
| Gromatic Ltd | Information & communication | 2024 |
| Groom Industries Ltd | Financial services | 2023 |
| Groomed to Furfection Ltd | Other services | 2025 |
| Grooming Lounge North Limited | Other services | 2026 |
| Grooup Ltd | Information & communication | 2017 |
| Groove Bar & Rendezvous Ltd | Hospitality | 2025 |
| Groove With TT Limited | Arts & recreation | 2026 |
| Grooveflow Unlimited Limited | Information & communication | 2023 |
| Groovegate UK Industries Limited | Hospitality | 2023 |
| Groovia Ltd | Information & communication | 2025 |
| Groplus Ltd | Information & communication | 2025 |
| Grorate (UK) Crop Nutrition Ltd | Extraterritorial | 2022 |
| Grosglik Ltd | Real estate | 2022 |
| Grosshans Verwaltungsgesellschaft Ltd | Extraterritorial | 2023 |
| Grossinvest Ltd | Real estate | 2026 |
| Grossland Limited | Real estate | 2026 |
| Grosvenor 19 Ltd | Real estate | 2026 |
| Grosvenor Architectural Design Limited | Professional & scientific | 2005 |
| Grosvenor Consultancy Group Limited | Information & communication | 2015 |
| Grosvenor Funding ( North West ) Ltd | Financial services | 2019 |
| Grosvenor Funding (MCR) Ltd | Financial services | 2024 |
| Grosvenor Funding Ltd | Financial services | 2017 |
| Grosvenor Gardens Darcy Lever Management Company Limited | Households | 2008 |
| Grosvenor Holding MCR Ltd | Real estate | 2024 |
| Grosvenor House Management Ltd | Real estate | 2017 |