| Foreshore Electrical Ltd | Littlehampton | 2024 |
| Foreshore Group Ltd | Littlehampton | 2024 |
| Foresight Audio Visual Limited | London | 2005 |
| Foresight Data Consultancy Limited | Borehamwood, Hertfordshire | 2016 |
| Foresight Energy VCT Limited | London | 2006 |
| Foresight Homes Ltd | Poole | 2023 |
| Foresight Plus Ltd | High Wycombe | 2015 |
| Foresight Project Control Ltd | Maidstone | 2013 |
| Foresight Sports Limited | Guildford | 2013 |
| Foresight Wealth Management Ltd | Exeter | 2019 |
| Foresite Group Holdings Ltd | Saffron Walden | 2024 |
| Forest Bliss Ltd | London | 2022 |
| Forest Capital Ltd | London | 2015 |
| Forest Equipment Services Limited | Gloucestershire | 1983 |
| Forest Farm Services Limited | Tonbridge | 2002 |
| Forest Farm Yard Management Company Limited | Worthing | 2013 |
| Forest Fire Fuels Ltd | Coleford | 2019 |
| Forest First Ltd | Cinderford | 2023 |
| Forest Gate (Corby) Property Limited | Corby | 2017 |
| Forest Glen Capital Holdings Ltd | Manchester | 2026 |
| Forest House Management Company (NI) Limited | Newtownards | 2006 |
| Forest Hydraulics Limited | Hornchurch | 2024 |
| Forest Mill Limited | Poole | 2014 |
| Forest Moor Properties Limited | Harrogate | 2005 |
| Forest Nominees Ltd | Manchester | 2004 |
| Forest of Dean Tree Services Limited | Coleford | 2020 |
| Forest Park Management (Fernhurst) Limited | London | 2023 |
| Forest Park Nominees 2 Ltd | Salford | 2022 |
| Forest Park Nominees Ltd | Salford | 2018 |
| Forest Vets Limited | Bristol | 2014 |
| Forest View (Cowes) Management Company Limited | Carshalton | 2000 |
| Forest Whole Foods Wholesale Ltd | Christchurch | 2024 |
| Forest Wood Floor Group Ltd | Beckenham | 2017 |
| Forester Close 1960 Limited | Hartlepool | 2014 |
| Forestfern Limited | Off Station Road | 1993 |
| Forestpoint Limited | Windlesham | 1993 |
| Forestry Warriors Ltd | Torquay | 2024 |
| Forestworks Limited | Ripley | 2020 |
| Forethought Dynamics Limited | London | 2015 |
| Forethought Limited | Sutton Coldfield | 1957 |
| Forever & Always Photography Limited | Horsham | 2021 |
| Forever Active Limited | Milton Keynes | 2001 |
| Forever Dreaming Ltd | Slough | 2021 |
| Forever Energy Limited | Berkshire | 1969 |
| Forever Fancy Ltd | Croxley Green | 2015 |
| Forever Fit and Healthy Limited | Tewkesbury | 2025 |
| Forever Fives Limited | Scarborough | 2018 |
| Forever Fuels Limited | Berkshire | 2007 |
| Forever Furniture Ltd | Newry | 2021 |
| Forever Hair & Beauty Ltd | Sittingbourne | 2019 |
| Forever IT Solutions Ltd | London | 2017 |
| Forever Marine Ltd | London | 2024 |
| Forever Marine Service Co., Ltd | Kenilworth | 2018 |
| Forever Memories 23 Ltd | King'S Lynn | 2020 |
| Forever Nine Textile Co., Ltd | Beckenham | 2019 |
| Forever Promotions Gifts Co., Ltd | London | 2024 |
| Forever Silver Limited | London | 2014 |
| Forever Sports Limited | Shirebrook | 2015 |
| FOREX4GURU Ltd | Aldershot | 2012 |
| Forface Ltd | Kington | 2025 |
| Forge Lane Quarry Limited | Dewsbury | 2015 |
| Forge Quarry Limited | Islington | 1995 |
| Forge Training and Consultancy Ltd | Blackwood | 2022 |
| Forge Waste Limited | High Wycombe | 2002 |
| Forged and Crafted Limited | Cleethorpes | 2024 |
| Forged Holdings Limited | Horley | 2025 |
| Forgefield Technologies Ltd | Manchester | 2025 |
| Forgepeak Engineering Ltd | Doncaster | 2026 |
| Forget ME NOT Forever Ltd | Cheltenham | 2026 |
| Forgood.Tech Limited | Rugeley | 2024 |
| Forjo Care Ltd | Wickford | 2024 |
| Fork Truck Rentals Limited | Hampshire | 1961 |
| Fork Truck Training Limited | Hampshire | 1970 |
| Fork Trucks Limited | Lye | 2004 |
| Forking Co Limited | London | 2001 |
| Forklift Training Services (Kent) Limited | Maidstone | 2013 |
| Forkpalm Limited | Oxford | 1980 |
| Forkway (Hire) Limited | Cannock | 1966 |
| Forlaget Tjuvtjern Limited | London | 2023 |
| Form Architectural Limited | Tunbridge Wells | 2011 |
| Form Architecture and Design Limited | Holmfirth | 2007 |
| Form E Forensics Limited | Dunstable | 2012 |
| Form Group Limited | Holmfirth | 2007 |
| Form Limited | Saffron Walden | 2000 |
| Form Space & Light Limited | Holmfirth | 2007 |
| Formacre Limited | Bridgend | 2026 |
| Formadesign Limited | London | 2010 |
| Formaflow Limited | Windlesham | 2011 |
| Formal Developments Limited | London | 2005 |
| Formation Agents Limited | Doncaster | 2006 |
| Formation Three Limited | Ipswich | 1999 |
| Formationcompany Ltd | Ilford | 2025 |
| Formations Direct Ltd | London | 2024 |
| Formations Made Simple Limited | London | 2005 |
| Formations Online Limited | Dartford | 2011 |
| Formattive Years Ltd | Boston | 2016 |
| Formby Cottages Limited | Liverpool | 2020 |
| Forme Luxury Lodges Ltd | Preston | 2022 |
| Formerton Limited | Sheffield | 1975 |
| Formerton Sheet Sales Limited | Sheffield | 1983 |