| GPR Trisec Ltd | Professional & scientific | 2025 |
| GPS Financial Ltd | Financial services | 2013 |
| GPS Flooring Ltd | Manufacturing | 2025 |
| GPS General Property Solutions Ltd | Other services | 2010 |
| GPS Group Ltd | Construction | 2018 |
| GPS Javed 16 Ltd | Health & social care | 2016 |
| GPT Estate Ltd | Real estate | 2023 |
| Gpuk Developments Limited | Administrative & support | 2018 |
| GPW CONSULTING1 Limited | Information & communication | 2018 |
| GQY Optin Limited | Wholesale & retail | 2025 |
| GR Europe Ltd | Information & communication | 2021 |
| GR Fire and Security Ltd | Construction | 2019 |
| GR Group Services Ltd | Construction | 2011 |
| GR Locations Ltd | Information & communication | 2019 |
| GR Supermart Ltd | Wholesale & retail | 2025 |
| GR View Wide Ltd | Wholesale & retail | 2024 |
| GRA BL Digital K Ltd | Wholesale & retail | 2025 |
| GRA CA Groud Ltd | Wholesale & retail | 2025 |
| GRA Contractors Ltd | Construction | 2026 |
| GRA Estate LA Ltd | Wholesale & retail | 2025 |
| GRA Solo ML Ltd | Wholesale & retail | 2025 |
| Grabbit&Go Ltd | Information & communication | 2020 |
| Grabora Ltd | Wholesale & retail | 2025 |
| Grabsol (PVT) Ltd. | Information & communication | 2018 |
| Grabsy Ltd | Wholesale & retail | 2025 |
| Grace BIO Limited | Wholesale & retail | 2025 |
| Grace in the Bible Ministry Ltd | Other services | 2025 |
| Grace Industries Ltd | Arts & recreation | 2020 |
| Grace Infrastructure Ltd | Construction | 2019 |
| Grace Lounge Ltd | Health & social care | 2016 |
| Grace Real Estate Ltd. | Real estate | 2020 |
| Grace Rose Property Ltd | Real estate | 2021 |
| Graced Property Services Ltd | Households | 2019 |
| Gracetree Ltd | Manufacturing | 2010 |
| Gracie Barra Cardiff Ltd | Professional & scientific | 2019 |
| Gracie Healthcare Ltd | Health & social care | 2017 |
| Gracious Peggy Investment Limited | Real estate | 2022 |
| Grade Coffee Ltd | Hospitality | 2023 |
| Grade Estates Limited | Real estate | 2005 |
| Gradebrook Services Limited | Information & communication | 1999 |
| Gradfeed Limited | Administrative & support | 2015 |
| Graduate Scheme Success Limited | Education | 2018 |
| Graeme Dart Copywriting Limited | Information & communication | 2016 |
| Graeme Hooper Consultancy Limited | Professional & scientific | 2012 |
| Graffeg Limited | Information & communication | 2003 |
| Grafling Capital Ltd | Financial services | 2019 |
| Graft Furniture Ltd | Other services | 2024 |
| Graft Polymer IP Limited | Professional & scientific | 2021 |
| Graham A.Pavey Landscape and Garden Design Limited | Administrative & support | 2018 |
| Graham Properties Limited | Construction | 1979 |
| Graham Solutions Ltd | Information & communication | 2023 |
| Graham Sweet Studios Ltd | Manufacturing | 2021 |
| Graham's Kitchen Ltd | Hospitality | 2021 |
| Grahams Range Services Limited | Hospitality | 2015 |
| Grahen Gillam Ltd | Administrative & support | 2019 |
| Graig Consultants Limited | Professional & scientific | 2000 |
| Graig Lodge Livery and Stud Limited | Administrative & support | 2012 |
| Graigwen Tuning and Auto Services Ltd | Wholesale & retail | 2025 |
| Grain Tax Ltd | Wholesale & retail | 2026 |
| Grain Verse Ltd | Wholesale & retail | 2026 |
| Grains Estimating Ltd | Professional & scientific | 2025 |
| Grainsford Limited | Manufacturing | 2025 |
| Granary Projects Ltd | Manufacturing | 2022 |
| Granby House Management Company Limited | Real estate | 2003 |
| Grance Limited | Information & communication | 2021 |
| Grand Bloom Limited | Financial services | 2021 |
| Grand Gazelle Limited | Real estate | 2019 |
| Grand Getaways Limited | Hospitality | 2023 |
| Grand Giant Limited | Extraterritorial | 2021 |
| Grand Gold Invest Ltd | Wholesale & retail | 2025 |
| Grand Kitchen 59 Limited | Hospitality | 2019 |
| Grand Landscapers Ltd | Administrative & support | 2020 |
| Grand Orient Limited | Administrative & support | 2018 |
| Grand Perspective PC | | 2014 |
| Grand Pizza Cardiff Ltd | Hospitality | 2020 |
| Grand Rentier Limited | Real estate | 2019 |
| Grand Scenic Limited | Construction | 1996 |
| Grand Security Ltd | Administrative & support | 2013 |
| Grand Sylhet Cardiff Ltd | Hospitality | 2026 |
| Grand Valley Dental Ltd | Health & social care | 2020 |
| Grandeur Collection Limited | Wholesale & retail | 2019 |
| GRANDEVENT4U Ltd | Hospitality | 2026 |
| Grandexchangeuk Limited | Wholesale & retail | 2025 |
| Grandico Ltd | Wholesale & retail | 2019 |
| Granding Services Ltd | Administrative & support | 2019 |
| Granew Ltd | Wholesale & retail | 2018 |
| Grange & Gealy Ltd | Real estate | 2024 |
| Grange Market Ltd | Wholesale & retail | 2026 |
| Grange Mobile Ltd | Other services | 2018 |
| Grange Pavilion Youth Forum CIC | Information & communication | 2021 |
| Grange Vape and B&B Brew and Bite Ltd | Administrative & support | 2017 |
| Grangelodge Residential Home Ltd | Health & social care | 2013 |
| Grangemoor Court (NO 1) RTM Company Limited | Households | 2012 |
| Grangemoor Court Limited | Real estate | 2019 |
| Grangetown Carpet Centre and Company Limited | Wholesale & retail | 1978 |
| Grangetown Community Leisure Limited | Arts & recreation | 2025 |
| Grangetown Plumber Ltd | Construction | 2025 |
| Grangetown Properties Ltd | Real estate | 2025 |
| Granite Brick Limited | Wholesale & retail | 2008 |
| Granite Corporate Alliance Limited | Mining & quarrying | 2008 |