| Greenlands Investments Limited | Financial services | 2025 |
| Greenlands Nutrition Limited | Agriculture & fishing | 2005 |
| Greenlands Tree Care Ltd | Agriculture & fishing | 2009 |
| Greenlight Heating and Plumbing Ltd | Other services | 2018 |
| Greens Fine Foods Limited | Wholesale & retail | 2003 |
| Greens High Class Foods Limited | Wholesale & retail | 2006 |
| Greens of Garstang Limited | Real estate | 2020 |
| Greenspace Holdings Limited | Real estate | 2022 |
| Greenspear Products Limited | Professional & scientific | 2014 |
| Greenway Education Ltd | Administrative & support | 2017 |
| Greenway Equine Veterinary Services Ltd | Professional & scientific | 2019 |
| Greenways Land Technology Limited | Administrative & support | 2024 |
| Greenwood Ground Maintenance Ltd | Administrative & support | 2025 |
| Greenwood Presents Ltd | Arts & recreation | 2023 |
| Greenwood Test Centre Ltd | Wholesale & retail | 2021 |
| Greenwood Ventures Ltd | Professional & scientific | 2024 |
| Greenwoods Vehicle Re-Finishers Limited | Wholesale & retail | 2006 |
| Gregfit Limited | Extraterritorial | 2013 |
| Gregoire Parker Limited | Health & social care | 2015 |
| Gregs Delivery Ltd | Transport & logistics | 2025 |
| Gregson Lane Garage Limited | Wholesale & retail | 2007 |
| Gren Retrofit (Lightning) Limited | Construction | 2015 |
| Gressingham Anglers Limited | Other services | 1958 |
| Grey Triangle Limited | Information & communication | 2020 |
| Greyfriars Assets Limited | Construction | 2015 |
| Greyfriars Court Management Company Limited | Other services | 2007 |
| Greyline Property Company Limited | Real estate | 2025 |
| Greyskull Ventures Ltd | Information & communication | 2025 |
| Greystoke Building & Joinery Limited | Construction | 2024 |
| GRH Investments Limited | Real estate | 2025 |
| GRH Properties LLP | | 2012 |
| Gridnew Energy Limited | Professional & scientific | 1991 |
| Griffin Property Maintenance Limited | Construction | 2005 |
| Griffith & Co Developments Ltd | Financial services | 2022 |
| Griffith and Sharp Mortgage Services Limited | Financial services | 2008 |
| Griffith Property Holdings Limited | Real estate | 2020 |
| Grifx Ventures Ltd | Manufacturing | 2026 |
| Grill ONT Mill Limited | Hospitality | 2025 |
| Grill Shack (Preston) Ltd | Hospitality | 2020 |
| Grill Zone Ltd | Hospitality | 2019 |
| Grillsters Ltd | Hospitality | 2020 |
| Grimeford Mill Limited | Wholesale & retail | 2007 |
| Grimsargh Carpets Limited | Construction | 2018 |
| Grimsargh Garden Services Limited | Administrative & support | 2002 |
| Grimsargh Park Management Company Limited | Households | 2026 |
| Grind Food & Coffee Ltd | Hospitality | 2026 |
| Gritfury Ltd | Wholesale & retail | 2025 |
| Grizedale Maintenance Ltd | Construction | 2025 |
| GRM Anaesthetics Limited | Health & social care | 2023 |
| Gro-Agri Ltd | Wholesale & retail | 2018 |
| Gro-Pro Global Strategies Ltd | Professional & scientific | 2024 |
| Gro-Well Salads Limited | Agriculture & fishing | 2003 |
| Groco Newco 1 Limited | Real estate | 2015 |
| Groco Newco 4 Limited | Financial services | 2016 |
| Grosvenor Garage Motor Vehicle Sales Ltd | Wholesale & retail | 2012 |
| Groszek XL Limited | Wholesale & retail | 2024 |
| Grounded Physiotherapy Ltd | Health & social care | 2026 |
| Groundtech (UK) Limited | Wholesale & retail | 1998 |
| Groundtech Holdings Limited | Financial services | 2016 |
| Groundtek (NW) Ltd | Transport & logistics | 2009 |
| Groundwork Engineered Systems Ltd | Manufacturing | 2013 |
| Grovery Gundogs Limited | Agriculture & fishing | 2025 |
| Grow High Recruitment Limited | Administrative & support | 2025 |
| Grow My Sales Ltd | Professional & scientific | 2024 |
| Grow With Hope CIC | Education | 2024 |
| Groza C Ltd | Transport & logistics | 2018 |
| GRS Properties Limited | Construction | 2002 |
| Gruham Limited | Real estate | 2022 |
| Grundy Electrical Limited | Construction | 2000 |
| GS Car Centre Ltd | Wholesale & retail | 2019 |
| GS Clinic Ltd | Health & social care | 2013 |
| GS Estates (NW) Ltd | Real estate | 2026 |
| GS Properties (NW) Limited | Households | 2025 |
| GS Supplies Limited | Construction | 2006 |
| GS Tiling Contractors Limited | Construction | 2011 |
| GSC Property Solutions Limited | Real estate | 2026 |
| GSC Transportation Ltd | Transport & logistics | 2018 |
| GSG Consultancy Ltd | Professional & scientific | 2022 |
| GSP Synergy Limited | Professional & scientific | 2007 |
| GSR Solicitors Ltd | Professional & scientific | 2017 |
| GSS Construction Group Limited | Construction | 2024 |
| GSU Holdings Limited | Financial services | 2022 |
| GSU Landscapes Limited | Administrative & support | 2002 |
| GT Civils Ltd | Construction | 2020 |
| GT Electrical Contracting Ltd | Construction | 2017 |
| GT Property Management Limited | Real estate | 2019 |
| GT Property Rentals (NW) LLP | | 2025 |
| GT UK Holdings Ltd | Other services | 2017 |
| GT UK Investments Ltd | Administrative & support | 2016 |
| GT Work Psychology Ltd | Administrative & support | 2014 |
| GTA Consulting Limited | Information & communication | 2016 |
| GTB Consultancy Services Limited | Professional & scientific | 2016 |
| GTC Appraisals Limited | Professional & scientific | 2016 |
| Gtech Training Academy Ltd | Wholesale & retail | 2024 |
| Guardex Security Ltd | Administrative & support | 2025 |
| Guardian Recovery Limited | Financial services | 2008 |
| Guardian Training Group Ltd | Education | 2023 |
| Guardians of Nature Community Interest Company | Health & social care | 2022 |
| Guave Wellbeing Ltd | Health & social care | 2026 |
| Guide Education Ltd. | Education | 2013 |