| Florrie & JO Florist Limited | Wholesale & retail | 2022 |
| Flotek Group Limited | Information & communication | 2022 |
| Flow Campers Ltd | Administrative & support | 2022 |
| Flow Outdoors Ltd | Education | 2026 |
| Floyd-Ellis Properties Limited | Real estate | 2020 |
| Floydies Limited | Construction | 2019 |
| Floyds Plant Limited | Extraterritorial | 2013 |
| FLY Star Limited | Hospitality | 2024 |
| FMA Fashions Ltd | Wholesale & retail | 2026 |
| Focus Microwaves Limited | Information & communication | 2025 |
| Focusneed Limited | Real estate | 1996 |
| Fonjosh Ltd | Hospitality | 2023 |
| Foot Health Practice Bridgend Ltd | Health & social care | 2024 |
| Footprint Multimedia Limited | Information & communication | 2000 |
| Footsteps AI Limited | Information & communication | 2026 |
| Force Strength & Conditioning Ltd | Arts & recreation | 2011 |
| Forces Fitness Education CIC | Education | 2024 |
| Forces Fitness Limited | Administrative & support | 2007 |
| Fordbeck Limited | Wholesale & retail | 2024 |
| Fordburn Limited | Extraterritorial | 2026 |
| Fordmark Limited | Extraterritorial | 2026 |
| Fordmere Limited | Extraterritorial | 2021 |
| Fordrise Limited | Extraterritorial | 2022 |
| Foresite Recruitment Limited | Administrative & support | 2018 |
| Forester Drilling Ltd | Construction | 2021 |
| Forge Hill Property Developments Limited | Construction | 2021 |
| Forge Motors Maesteg Limited | Wholesale & retail | 2021 |
| FORGE3D CYF. | Information & communication | 2025 |
| Formacre Limited | Extraterritorial | 2026 |
| Fornis Engineering Limited | Construction | 2010 |
| Fortbeck Limited | Manufacturing | 2025 |
| Fortbrucke Bermuda Ltd | Professional & scientific | 2023 |
| Fortium Ltd | Extraterritorial | 2006 |
| Fortium Technologies Limited | Information & communication | 1999 |
| Foster Property Limited | Real estate | 2015 |
| Four Seasons Windows UK Limited | Construction | 2001 |
| Four-Sure Construction Limited | Construction | 2013 |
| FOX AESTHETICS1 Ltd | Health & social care | 2023 |
| FOX Electrical Systems Ltd | Construction | 2016 |
| Foxtroy Limited | Health & social care | 1985 |
| Franchising I AM Woman Limited | Administrative & support | 2011 |
| Frank Baden Prestige Car Ltd | Wholesale & retail | 2025 |
| Fraser Rail Ltd. | Construction | 2015 |
| Fraybeck Limited | Construction | 2025 |
| Fraydean Limited | Extraterritorial | 2025 |
| Frayward Limited | Extraterritorial | 2025 |
| Fred & Lily Limited | Manufacturing | 2024 |
| Freeamp Ltd | Agriculture & fishing | 2021 |
| Freebest Limited | Construction | 2024 |
| Freebird Decor Ltd | Wholesale & retail | 2025 |
| Freelake Limited | Extraterritorial | 2025 |
| Freerest Limited | Extraterritorial | 2026 |
| Freight Lancers Ltd | Transport & logistics | 2023 |
| Fresh Pair of Eyes Ltd. | Professional & scientific | 2015 |
| Fresh Thinking IT Ltd | Information & communication | 2019 |
| Fretlix Ltd | Education | 2020 |
| FRM Property Development Limited | Real estate | 2024 |
| FS Events Hire Limited | Administrative & support | 2015 |
| FSG Roofline Installations Ltd | Construction | 2026 |
| FTM Materials Handling (Holdings) Limited | Administrative & support | 2021 |
| FTM Materials Handling Limited | Administrative & support | 1986 |
| Fueld Food Limited | Hospitality | 2026 |
| Full Circle Business Solutions Limited | Professional & scientific | 2014 |
| Full-E-Loaded Ltd | Hospitality | 2025 |
| Funky Chair Company Ltd | Manufacturing | 2022 |
| Funkyfied Ltd | Professional & scientific | 2022 |
| Fusion Gymnastics and Trampoline Ltd | Arts & recreation | 2019 |
| Fusion Smart Property Limited | Real estate | 2024 |
| Fusion Tapas Ltd | Hospitality | 2024 |
| Fusp Utilities Ltd | Wholesale & retail | 2018 |
| Future Asset Management LLP | | 2004 |
| Future Focus Social Enterprise C.I.C. | Education | 2024 |
| Future Horizons Education Ltd | Education | 2023 |
| Future Momentum Ltd | Financial services | 2022 |
| Futureglaze Windows Limited | Construction | 1988 |
| Fuzed Electrical Supplies Ltd | Wholesale & retail | 2026 |
| FX Cartel Ltd | Education | 2018 |
| G & B Thomas Properties Ltd | Real estate | 2021 |
| G & S Roberts Ltd | Hospitality | 2016 |
| G & S Travel Limited | Transport & logistics | 2012 |
| G C Carpentry Services Limited | Construction | 2008 |
| G H H Tyres Ltd | Wholesale & retail | 2024 |
| G M T Developments Ltd | Construction | 2025 |
| G Morgan Consulting Ltd | Professional & scientific | 2017 |
| G Sutton Electrical Services Ltd | Construction | 2018 |
| G T Developments (Bridgend) Limited | Construction | 2002 |
| G W Churches Ltd | Construction | 2022 |
| G W Luke Plumbing and Heating Ltd | Construction | 2020 |
| G Walters Properties Ltd | Real estate | 2025 |
| G&G Social Work Consultancy Ltd | Health & social care | 2022 |
| G&K Builders Ltd | Construction | 2014 |
| G-Lec Solar Ltd | Energy | 2022 |
| G.B. Property Co Limited | Real estate | 2001 |
| G.H.H. GAS Services Ltd | Construction | 2020 |
| Gabiana Trans Limited | Transport & logistics | 2024 |
| Garage Equipment Solutions Ltd | Manufacturing | 2023 |
| Garden Centre Hand Car Wash Ltd | Administrative & support | 2025 |
| Garden Graft Bridgend Cyfyngedig | Water & waste | 2023 |
| Garden Lifestyles Limited | Administrative & support | 2004 |
| Garden Sanctuaries Ltd | Administrative & support | 2018 |