| FOJ Ventures Limited | Wholesale & retail | 2025 |
| Fola Babarinde Photography Ltd | Information & communication | 2026 |
| Fone Care Bangor Ltd | Wholesale & retail | 2024 |
| Fonic Trust | Professional & scientific | 2005 |
| Fonz Bangor Limited | Wholesale & retail | 2025 |
| Food Fortress Limited | Other services | 2015 |
| Food Possibilities CIC | Education | 2024 |
| Foodyarj Ltd | Hospitality | 2024 |
| Forest Road Student Limited | Construction | 2016 |
| Foreverfourteens Ltd | Wholesale & retail | 2025 |
| Forge 365 Ltd | Information & communication | 2026 |
| Formative Architects Limited | Professional & scientific | 2006 |
| Formston Garden Maintenance Ltd | Administrative & support | 2026 |
| Formston Tree Services Ltd | Agriculture & fishing | 2026 |
| Fossette Limited | Financial services | 2021 |
| Foulkes FX Limited | Information & communication | 2022 |
| Fractional H.P. Motors Limited | Manufacturing | 1987 |
| Fraser Houses (N.I.) Limited | Construction | 1983 |
| Fraser Partnership (NI) Limited | Construction | 2006 |
| Fraser Wood & Associates Limited | Professional & scientific | 2007 |
| Fraser Wood Limited | Professional & scientific | 2016 |
| Free Field Audio Ltd | Arts & recreation | 2019 |
| French & Davies Ltd | Construction | 2022 |
| Freshers Pbsh Chester Limited Partnership | | 2010 |
| Freshers Pbsh Limited Partnership | | 2011 |
| Friars Cottage Maintenance Limited | Households | 1997 |
| Frixiongk Limited | Wholesale & retail | 2022 |
| Frontline Development | Other services | 1995 |
| Frontos Properties Ltd | Extraterritorial | 2024 |
| Frost Guiding Courses Limited | Administrative & support | 2013 |
| FRS Systems Ltd | Administrative & support | 2019 |
| Frsni Limited | Administrative & support | 2014 |
| Fruit & Pods Ltd | Wholesale & retail | 2025 |
| Frying Squad Ltd - the | Hospitality | 2002 |
| Fujima Asian Fusion Ltd | Hospitality | 2024 |
| Full Boost Consulting Ltd | Information & communication | 2025 |
| Fuller 206 Ltd | Arts & recreation | 2013 |
| Fundamania Limited | Arts & recreation | 2022 |
| Funky Music Management Ltd | Information & communication | 2023 |
| Furlong Construction Limited | Real estate | 2017 |
| Fusco (N.I.) Limited | Hospitality | 2015 |
| Future Company 2025 Ltd | Other services | 2025 |
| Future Sound of Egypt (Global Events) Ltd | Wholesale & retail | 2018 |
| Future Sound of Egypt Holdings Limited | Financial services | 2025 |
| Future Sound of Egypt Limited | Information & communication | 2018 |
| Futureland Films Ltd | Information & communication | 2024 |
| FVC Ltd | Professional & scientific | 2017 |
| G & C Roberts & SON (N.Wales) Limited | Construction | 2006 |
| G E Electrical (NI) Limited | Construction | 2012 |
| G Force Amusements Limited | Arts & recreation | 2011 |
| G H Safety Ltd | Public administration | 2023 |
| G Lock Scrap Processors Ltd | Extraterritorial | 2010 |
| G M Software Solutions Ltd | Information & communication | 2025 |
| G R S Quigg Ltd | Real estate | 2025 |
| Gallt Y Rhedyn Ltd | Real estate | 2020 |
| Gaming Compliance Services Ltd | Information & communication | 2024 |
| Gannon Minerals & Powders Limited | Financial services | 2019 |
| Garden Cantonese Limited | Hospitality | 2019 |
| Garden Ethos Limited | Professional & scientific | 2012 |
| Garden Slate and Stone Ltd | Manufacturing | 2022 |
| Gareth Evans Software Ltd | Information & communication | 2022 |
| Garogosi Studio Ltd | Professional & scientific | 2023 |
| Garth Road Investments | | 1987 |
| GAS Lane Bristol Limited | Construction | 2020 |
| GAS Products Direct Ltd | Wholesale & retail | 2009 |
| GBT Cardiology Services Ltd | Health & social care | 2022 |
| GC Carpets Limited | Wholesale & retail | 2003 |
| GC Gyms & Leisure Ltd | Arts & recreation | 2022 |
| GCB Property and Letting Limited | Households | 2025 |
| Gearpimp Ltd | Wholesale & retail | 2022 |
| Generator Hire North Wales Ltd | Administrative & support | 2021 |
| Gent & Craig Insurances Ltd | Financial services | 2007 |
| Georgio's Ice Cream Ltd | Hospitality | 2015 |
| Gianlucaproperties Ltd | Real estate | 2026 |
| Giant Associates Limited | Professional & scientific | 2007 |
| Gibson Construction Maintenance & Installations Ltd | Construction | 2022 |
| Gifted Trust | Hospitality | 2020 |
| Giggle Water Group Ltd | Hospitality | 2014 |
| Giles Kennedy Limited | Other services | 2011 |
| Ginger MNI Ltd | Information & communication | 2022 |
| GJM Bass Limited | Information & communication | 2024 |
| Gladstone Road Exeter Limited | Extraterritorial | 2019 |
| Glan DWR Flats Limited | Households | 1973 |
| Glanhau Allanol Ffenestri Sgwar Exterior Cleaning CYF | Administrative & support | 2025 |
| Glanhau Ffenestri Sgwar Window Cleaning CYF | Administrative & support | 2025 |
| Glas (Project Management and Construction) Limited | Construction | 2008 |
| Glen Baxter Ltd | Other services | 2024 |
| Glen Gate Management Company Limited | Extraterritorial | 2008 |
| Glen Park Management Company NO. 1 Limited | Extraterritorial | 2002 |
| Glen Road Management Company Limited | Extraterritorial | 2005 |
| Glenaan Apartments Limited | Households | 1981 |
| Glenabbey Estates Limited | Real estate | 1963 |
| Glenford Enterprises Limited | Real estate | 2009 |
| Glenholme Management Company Limited | Households | 2014 |
| Glenn Veterinary Clinic Ltd | Professional & scientific | 2022 |
| Glenview Court Management Limited | Households | 2008 |
| GLI UK Gaming Ltd | Information & communication | 2008 |
| Global Fisheries Limited | Agriculture & fishing | 2021 |
| Global Resolutions Limited | Professional & scientific | 2019 |
| Global Sporting Moments Ltd | Wholesale & retail | 2025 |