| Flancrest Enterprises UK Limited | Information & communication | 2025 |
| Flint Filling Station Limited | Real estate | 2007 |
| Flintshire and Denbighshire Learning Disability Services Ltd | Health & social care | 2024 |
| Flintshire Libraries and Leisure Limited | Arts & recreation | 2024 |
| Flintshire Pet Food Limited | Wholesale & retail | 2015 |
| Flintshire Precision Engineering Ltd | Manufacturing | 2009 |
| Flintshire Reclaims Limited | Wholesale & retail | 2025 |
| Flintshire Transport Services Limited | Transport & logistics | 1998 |
| Flintshire Tyres & Auto Care Ltd | Wholesale & retail | 2026 |
| Floods Properties & Development Company Limited | Real estate | 1971 |
| Florin Olteanu Ltd | Transport & logistics | 2014 |
| Food Safe Pro Ltd | Professional & scientific | 2024 |
| Forbici Restaurants Ltd | Hospitality | 2026 |
| Foreverrend Ltd | Construction | 2024 |
| Forster Tullett Group Limited | Construction | 2017 |
| Forster Tullett Limited | Construction | 2016 |
| Forte Femme Ltd | Wholesale & retail | 2025 |
| FOX Cottage Ltd | Hospitality | 2025 |
| FOX Safety & Management Ltd | Construction | 2022 |
| FOX Tango Asset Protection Ltd | Administrative & support | 2020 |
| Freedom Park Leisure Ltd | Hospitality | 2005 |
| Freestyle Karate KAI UK Ltd | Arts & recreation | 2013 |
| Freon Supply Limited | Energy | 2025 |
| Frogsborn Diving Services Limited | Wholesale & retail | 2017 |
| FST Systems Limited | Construction | 2021 |
| Full Circle Security Systems Limited | Construction | 2020 |
| Fusion Core Limited | Information & communication | 2025 |
| Future Perspectives Limited | Education | 2014 |
| FV 2023 Limited | Hospitality | 2023 |
| G & B Property Developments Ltd | Construction | 2016 |
| G a Simpson Builders Limited | Construction | 2002 |
| G E West Ltd | Other services | 2024 |
| G M Properties (Wallasey) Limited | Real estate | 2015 |
| G Smith Builders Ltd | Construction | 2011 |
| G&S Services Ltd | Administrative & support | 2025 |
| G.H. Lewis & SON Limited | Construction | 2006 |
| G.J. Shirvington Ltd | Construction | 2004 |
| G.J.Maintenance Engineering Ltd | Manufacturing | 2011 |
| Gail Biddulph Limited | Professional & scientific | 2013 |
| Gaius Developments Ltd | Real estate | 2026 |
| Gaius Engineering Ltd | Manufacturing | 2024 |
| Gallaghers Motor Company Limited | Wholesale & retail | 2017 |
| GAM Lettings Ltd | Real estate | 2024 |
| GAP Funding Solutions Ltd | Financial services | 2022 |
| Garage Time Company Ltd | Construction | 2024 |
| Gary Jones Mortgage Consultant Limited | Financial services | 2015 |
| Gccl 57 Ltd | Hospitality | 2026 |
| GE & KE Associates Ltd | Other services | 2016 |
| Geary Developments Ltd | Construction | 2021 |
| GEM 3D Ltd | Professional & scientific | 2020 |
| GEM and Co Hair Salon Ltd | Other services | 2023 |
| Gembex Limited | Professional & scientific | 2025 |
| Generator NPD Limited | Manufacturing | 2001 |
| George Oliver Electrical Limited | Construction | 2020 |
| Ginny Jane Limited | Information & communication | 2021 |
| GJM Asset Management Ltd | Administrative & support | 2017 |
| Gladstone's Library | Education | 1989 |
| Glascoed Farm Limited | Agriculture & fishing | 2011 |
| Go Franchise Recruitment Limited | Professional & scientific | 2020 |
| Go Go Convenience Store Ltd | Wholesale & retail | 2025 |
| Goga Deliveries Ltd | Transport & logistics | 2023 |
| Goker Food Ltd | Hospitality | 2025 |
| Golftyn After School Club Ltd | Other services | 2015 |
| Good Wood Cymru (NW) Ltd | Manufacturing | 2021 |
| Gotaland Care Ltd | Information & communication | 2019 |
| GP Building NW Limited | Construction | 2024 |
| Gracely Healthcare Limited | Health & social care | 2026 |
| Grate Walls of Fire Limited | Real estate | 2000 |
| Grateful AF Limited | Hospitality | 2021 |
| Gravittas Ltd | Transport & logistics | 2016 |
| Graydon Property Limited | Real estate | 2026 |
| Grayz Couriers Limited | Transport & logistics | 2021 |
| Great Choice Services Limited | Transport & logistics | 2026 |
| Gredington (Holt) Management Company Limited | Households | 2013 |
| Green Candle Carriers Limited | Transport & logistics | 2020 |
| Green Planet Energy Solutions Limited | Construction | 2014 |
| Green Planet Estates Ltd | Hospitality | 2024 |
| Green RPA Solutions Limited | Professional & scientific | 2017 |
| Greenhouse Energy Limited | Professional & scientific | 2018 |
| Greenvale Group Ltd | Construction | 2019 |
| Griffiths Building Developments Limited | Construction | 2018 |
| Grime Bust (UK) Limited | Administrative & support | 2025 |
| Gripp Technologies Limited | Manufacturing | 2014 |
| Groomscroft Residents Management Company Limited | Households | 2018 |
| Grosik in Shotton Limited | Wholesale & retail | 2019 |
| Ground Cover Landscaping Ltd | Other services | 2026 |
| Groundsolve Limited | Professional & scientific | 2004 |
| Gulshan Restaurant & Bar Limited | Hospitality | 2025 |
| GWS Design Limited | Professional & scientific | 2020 |
| Gzero Programming Services Limited | Professional & scientific | 2018 |
| H & a Garage Deeside Ltd | Wholesale & retail | 2026 |
| H & a Garage Shotton Ltd | Wholesale & retail | 2024 |
| H & M R S Holding Limited | Financial services | 2024 |
| H & M R S Properties Limited | Real estate | 2023 |
| H&A Garage Ltd | Extraterritorial | 2022 |
| HAA7 Properties Ltd | Households | 2025 |
| Habibi Jade Ltd | Health & social care | 2024 |
| Hackremco (NO. 2518) Limited | Administrative & support | 2007 |
| Hadbron Green Energy Consultancy Ltd | Professional & scientific | 2025 |
| Hairmaster Barber Deeside Ltd | Other services | 2023 |