| Free Celtic Spirit Ltd | Extraterritorial | 2022 |
| Free Media Networks Ltd. | Administrative & support | 2022 |
| Free Your Life Ltd | Extraterritorial | 2025 |
| Freedom Wealth LLP | | 2016 |
| Freesabi Ltd | Extraterritorial | 2022 |
| Freestyle Barbers Ltd | Other services | 2025 |
| Frei.Community Ltd | Administrative & support | 2023 |
| Freshwater East Park (Management) Limited | Hospitality | 1971 |
| Freya Energy Ltd | Extraterritorial | 2024 |
| Freyenergy Ltd. | Administrative & support | 2024 |
| Freystrop Construction Limited | Construction | 2017 |
| Frio Astrid Euro Limited | Professional & scientific | 1998 |
| Frio Tiempo Limited | Health & social care | 2011 |
| From OUR Farm Ltd | Manufacturing | 2017 |
| Fufil International Ltd | Administrative & support | 2025 |
| Full Sails Limited | Professional & scientific | 2025 |
| Fusionix Ltd | Other services | 2023 |
| Future With US Ltd | Extraterritorial | 2021 |
| Futurenowmh Ltd | Extraterritorial | 2022 |
| Fznt Group Ltd | Other services | 2023 |
| G & G Builders (Special Projects) Limited | Construction | 2017 |
| G & HC Engineering Limited | Professional & scientific | 2020 |
| G Jenx and Sons Limited | Construction | 2025 |
| G Management International Ltd | Administrative & support | 2019 |
| G&M Pierce Resources Ltd | Agriculture & fishing | 2025 |
| G.D.S. Tyres Limited | Wholesale & retail | 2002 |
| G.J. Tyre and Exhaust Centres Limited | Real estate | 1982 |
| G.P. & G.C. James Limited | Wholesale & retail | 2016 |
| G.R. Davies & Family Limited | Agriculture & fishing | 2003 |
| G.V. Thomas & Co Limited | Manufacturing | 2017 |
| Gabriel Wapner Design Ltd | Construction | 2022 |
| GAD Business Services Ltd | Professional & scientific | 2003 |
| Gaetan Simo Ltd | Information & communication | 2019 |
| Gaia Baltica Ltd. | Extraterritorial | 2024 |
| Galleon Inn (Pembrokeshire) Ltd | Hospitality | 2016 |
| Gantex Ltd | Administrative & support | 2022 |
| Gareth Dewhurst Holdings Limited | Financial services | 2006 |
| Gareth Driving Academy Ltd | Education | 2026 |
| Gareth Price Plumbing & Heating Ltd | Construction | 2014 |
| Gareth Rudder Fishing Limited | Agriculture & fishing | 2011 |
| Garland Stone Productions Limited | Information & communication | 2002 |
| Garn 7 Ltd | Professional & scientific | 2025 |
| Gateways Consulting Ltd | Professional & scientific | 2026 |
| GC & AC Joules Limited | Agriculture & fishing | 2004 |
| GDH (Holdings) Limited | Professional & scientific | 2011 |
| Gdjt Consulting Limited | Professional & scientific | 2023 |
| Gelzan Limited | Real estate | 1995 |
| Gengard Limited | Wholesale & retail | 1999 |
| George ST. Elvis Limited | Agriculture & fishing | 2013 |
| GES4LIFE Ltd | Extraterritorial | 2023 |
| GET the Boys a Lift Community Interest Company | Wholesale & retail | 2019 |
| GGT. Thomas & SON Limited | Construction | 2001 |
| GI Tanker Services Ltd | Professional & scientific | 2024 |
| Giltar Property Group Limited | Real estate | 2025 |
| Gipoint Ltd | Other services | 2022 |
| GJM Fabrications Ltd | Professional & scientific | 2021 |
| GK Bench Limited | Manufacturing | 2017 |
| Glasey Ltd | Administrative & support | 2024 |
| Glen Court Apartments Management Company Limited | Real estate | 1999 |
| Glenover House Limited | Education | 2009 |
| Global Connectivity Solutions LLP | | 2024 |
| Global ENERGY23 Limited | Construction | 2023 |
| Globalmind AI Ltd | Information & communication | 2025 |
| Glowing Sun 111 Ltd | Extraterritorial | 2025 |
| Glowing Sun Ltd | Extraterritorial | 2025 |
| GMC Consultants Limited | Professional & scientific | 2011 |
| GN & K Enterprises Limited | Real estate | 2026 |
| GND Products ( Wholesale) Limited | Wholesale & retail | 2014 |
| GND Products Limited | Wholesale & retail | 2013 |
| Gneiu Ltd | Wholesale & retail | 2024 |
| GNT Finance LP | | 2021 |
| Go for Flow Ltd | Administrative & support | 2021 |
| Gofdy Y Ddraig Ltd | Manufacturing | 2025 |
| Gold Lion Properties Limited | Real estate | 2020 |
| Golden Soul Ltd | Extraterritorial | 2025 |
| Goldsmith's Tree Care Ltd | Agriculture & fishing | 2024 |
| Goldyian Ltd | Wholesale & retail | 2023 |
| Goliath Limited | Real estate | 2003 |
| Gorilla ERP Limited | Administrative & support | 2017 |
| GP Amaeth CYF | Agriculture & fishing | 2020 |
| Gpmax Consulting Limited | Professional & scientific | 2014 |
| Grass Cattle Ltd | Professional & scientific | 2009 |
| Grasshoppers Crop Care Ltd | Agriculture & fishing | 2015 |
| Gravity Sports Media Limited | Information & communication | 2022 |
| Greater Goals Media Ltd | Information & communication | 2018 |
| Green Anaesthesia Limited | Health & social care | 2019 |
| Green Futures Festivals Co Ltd | Arts & recreation | 2005 |
| Green Park Fine Rugs Ltd | Wholesale & retail | 1964 |
| Green Triangle Management Systems Limited | Professional & scientific | 2009 |
| Green Warmth Ltd | Construction | 2007 |
| Greene Tree and Gardens Ltd | Administrative & support | 2026 |
| Greener Camping Club Limited | Arts & recreation | 2015 |
| Greener Growth CIC | Professional & scientific | 2013 |
| Greenfreedom Ltd | Extraterritorial | 2021 |
| Greens Motors Ltd | Wholesale & retail | 1919 |
| Greensoulspirit Ltd | Extraterritorial | 2025 |
| Grey’S Coffee Bar Ltd | Hospitality | 2019 |
| Griffin Inn Dale Ltd | Hospitality | 2014 |
| Griffiths Francis Group Ltd | Manufacturing | 2024 |
| Griffiths Incorporated Ltd | Construction | 2014 |