| Full Range Ballistic Enterprises Ltd | Belper | 2010 |
| Full Range Physiotherapy Limited | Shoreham-By-Sea | 2023 |
| Full Resources Company Limited | Beckenham | 2012 |
| Full Rotation Limited | Wokingham | 2011 |
| Full Speed Events Limited | Chesterfield | 2014 |
| Full Success International Group Limited | London | 2015 |
| Full Tank Limited | London | 2024 |
| Full Time Creative Limited | Sheffield | 2001 |
| Full Time Marketing Limited | Sheffield | 1997 |
| Full Time Newmedia Limited | South Yorkshire | 2002 |
| Fullawar Ltd. | Beckenham | 2023 |
| Fullcolour.Com Limited | Congleton | 2019 |
| Fuller & Roper (Holdings) Limited | Bristol | 2012 |
| Fuller Battery Ltd | Ashby-De-La-Zouch | 2022 |
| Fuller Housing Ltd | Ashby-De-La-Zouch | 2021 |
| Fuller Reach Limited | Glasgow | 2012 |
| Fuller Timber Limited | Haywards Heath | 1997 |
| Fullers Solicitors Limited | Rugby | 2014 |
| Fullfaith Resources Limited | Cambridge | 2019 |
| Fullhand Limited | Cheltenham | 2018 |
| Fullmotion Events Ltd | Cradley Heath | 2011 |
| Fullspan Marketing Limited | Cleckheaton | 2010 |
| Fullthrottle Mechanics Ltd | Doncaster | 2026 |
| Fully Furnished Rentals Ltd | Widnes | 2019 |
| Fully Fused Limited | Hatfield | 2010 |
| Fully Global Limited | London | 2016 |
| Fulvia Classics Limited | Watford | 2020 |
| Fulwoods Drive 1955 Limited | Milton Keynes | 2014 |
| Fumeka Ltd | London | 2019 |
| FUN Ltd | Congleton | 2025 |
| FUN Town Shoes Limited | Beckenham | 2014 |
| Fun&Cool Ltd | London | 2025 |
| Funbox Game Co. Ltd | Kenilworth | 2023 |
| Function Junction (SW) Ltd | Saltash | 2011 |
| Functional Health Limited | Hornchurch | 2014 |
| Functional Reflex Therapy Ltd | Dunmow | 2015 |
| Fundacion Maraan Limited | London | 2025 |
| Fundamental Group Limited | London | 2019 |
| Fundamental Promotions Ltd | Tunbridge Wells | 2000 |
| Fundamentals Marine Ltd | London | 2024 |
| Fundays Commerce Ltd | Maidenhead | 2023 |
| Fundbridge Limited | Sandy | 2023 |
| Fundforce Limited | Trowbridge | 2013 |
| Funding & Investments Limited | Coventry | 2014 |
| Funding Capital Limited | London | 2014 |
| Funding Focus Investment Limited | London | 2021 |
| Funds & Property Co. Ltd | London | 2007 |
| Funeral Debt Collection Limited | Sutton Coldfield | 2008 |
| Funeral Expert.Com Limited | Ipswich | 2017 |
| Funeral Planning Experts Limited | Ross On Wye | 2017 |
| Funeral Services London Limited | Sutton Coldfield | 1972 |
| Funerals Made Simple Limited | Nottingham | 2005 |
| Funerals on a Budget Ltd | Nottingham | 1954 |
| Funfair Limited | Stoney Common Road Stansted | 2001 |
| Fungorum Limited | Uckfield | 2023 |
| Funk OFF Limited | Lytham St Annes | 2025 |
| Funk OFF Pro Limited | Lytham St Annes | 2025 |
| Funkier Than Funk Ltd | Belfast | 2009 |
| Funksjonshemmedes Fellesorganisasjon Troms OG Finnmark Limited | London | 2019 |
| Funky Chefs Company Ltd | Bognor Regis | 2021 |
| Funky Enterprises Limited | Coventry | 2023 |
| Funky Li'L Feet Limited | London | 2004 |
| Funky NUT Company Limited | Leicester | 2022 |
| Funky Orange Limited | Worthing | 2019 |
| Funky Poobah Music Publishing Ltd | London | 2019 |
| Funky Store Ltd | Uxbridge | 2015 |
| Funky Yukka Ltd | Stafford | 2016 |
| Funkymonkey Boatnames Limited | Lymington | 2013 |
| Funmbo Ltd | Newport | 2024 |
| Funmie Limited | London | 2021 |
| Funnell 1967 Limited | Caterham | 2013 |
| Funnells Development Limited | Heathfield | 2018 |
| Funny Phonics Limited | Leamington Spa | 2023 |
| Funnyfuzzy UK Co., Ltd. | Cardiff | 2021 |
| Funnyhomepp Ltd | Manchester | 2022 |
| Funomatics Limited | Bourne Road | 1971 |
| Funsize Trading Limited | Bromley | 2008 |
| Funster Global Ltd | Camberley | 2025 |
| Funtime Unlimited Ltd | London | 2011 |
| Fuqu Limited | Chichester | 2014 |
| FUR Dogs Sake Ltd | Farnham | 2024 |
| FUR Fabrics Limited | Greenford | 1963 |
| Furida International Co., Ltd | London | 2016 |
| Furkan(London) Ltd | London | 2022 |
| Furlong Place (Axbridge) Management Company Limited | Axbridge | 2001 |
| Furnace Court Management Company Limited | Stourbridge | 2006 |
| Furness Partnership (Leeds) Limited | | 1989 |
| Furniss Management Consulting Limited | Leicester | 2014 |
| Furniture (Seconds) Sales Limited | Paisley | 2014 |
| Furniture and Choice Limited | Heckmondwike | 2020 |
| Furniture Build Network Limited | Taunton | 2015 |
| Furniture Cash and Carry Wholesale Ltd | Stretford | 2021 |
| Furniture Fables Limited | Winchester | 2016 |
| Furniture Futures Limited | Downham Market | 2008 |
| Furniture in Store Limited | Birmingham | 2020 |
| Furniture Matters Limited | Burnley | 2013 |
| Furniture UN Limited | Swansea | 2013 |
| Furnitureland Limited | Slough | 2022 |
| Furnitureville Ltd | London | 2023 |
| Furnwood Productions Limited | Nottingham | 1949 |