| Flight Courier Worldwide Limited | Colnbrook Slough | 1997 |
| Flight Level One Ltd | Crosby | 2009 |
| Flight Limited | Solihull | 2025 |
| Flightform (Edinburgh) Limited | Exeter | 2000 |
| Flightform Limited | Exeter | 1991 |
| Flightform UK Limited | Exeter | 1997 |
| Flights on Planet Earth Limited | Manchester | 2020 |
| Flights to Spain Ltd | Bristol | 2024 |
| Flights UN Limited | Swansea | 2013 |
| Flightstep Residents Company Limited | | 1987 |
| Flightway Trading Company Ltd | London | 2012 |
| Flinders Farm Limited | Hessle | 2003 |
| Flint and Flame Limited | Billingshurst | 2015 |
| Flint Bishop Commercial Services Limited | Derby | 2022 |
| Flint Bishop Private Client Services Limited | Derby | 2022 |
| Flint Futures Consultancy Ltd | Coalville | 2025 |
| Flint Management Ltd | Rickmansworth | 2008 |
| Flint N Stone Ltd | Bury St Edmunds | 2022 |
| Flint Peak Business Advisors Ltd | Manchester | 2026 |
| Flintlodge Limited | London | 2002 |
| Flints Direct Limited | Derby | 2006 |
| Flintshire Holdings Limited | Holywell | 2013 |
| Flintshire Waste Management and Recycling Services Limited | Rhyl | 1997 |
| Flip Pancakes Limited | South Petherton | 2014 |
| Flipbook Films Ltd | Manchester | 2014 |
| Flipcliff Limited | Radcliff, Manchester | 2006 |
| Flippin Brilliant Ltd | Dunblane | 2024 |
| Flipping Delicious Limited | Bournemouth | 2019 |
| Flipside Limited | Etchingham | 2012 |
| Flis Natursteinarbeide Ltd | Stockport | 2005 |
| Flitcraft Timber Frame Limited | Bolton | 2018 |
| Flitsale Limited | London | 1998 |
| Flitton Commercial Limited | Kettering | 2006 |
| Flixglow Limited | Fareham | 2005 |
| Flixx Ltd | Manchester | 2024 |
| FLM Global Technology Invest Ltd | Dover | 2017 |
| FLM Global Technology Ltd | Dover | 2017 |
| FLM Limited | Sidcup | 2019 |
| FLM Realisations Limited | Midlothian | 1997 |
| Flo-Store Limited | Tadcaster | 2019 |
| Floaim Ltd | Solihull | 2012 |
| Float Coffee & Kitchen Ltd | Chalfont St Giles | 2021 |
| Float House Limited | Henley-On-Thames | 2004 |
| Floating Dimensions Ltd | Stockport | 2021 |
| Flock EWE Limited | London | 2012 |
| Flockatter Ltd | Portsmouth | 2021 |
| Flockworks Ltd | Whitley Bay | 2012 |
| Floema UK Ltd | London | 2022 |
| Flog IT Limited | Frome | 2007 |
| Flog ME IT Limited | Harrogate | 2012 |
| Flogas Atlas Limited | Syston | 1960 |
| Flogas Direct Limited | Syston | 2001 |
| Flood Control Limited | Exeter | 2014 |
| Flood Investments Limited | Manchester | 2017 |
| Flood Risk Assessments Ltd | Weston-Super-Mare | 2006 |
| Floodgate Industries Limited | Horsham | 2025 |
| Floor Art Ltd | London | 2023 |
| Floor Restorations UK Limited | Solihull | 2008 |
| Floor Store (N I) Limited - the | 22 Great Victoria Street | 2000 |
| Floored by LEE Bates Limited | Bishop Auckland | 2013 |
| Flooring @ Holding Ltd | Jarrow | 2022 |
| Flooring Cash and Carry Ltd | Stretford | 2021 |
| Flooring Distributors Limited | Orpington | 1965 |
| Flooring Logistics Ltd | Birmingham | 2013 |
| Flooring Revolution Ltd | Bishop Aukland | 2022 |
| Flooring Sales Direct Ltd | Birmingham | 2013 |
| Flooringbee Limited | Manchester | 2019 |
| Floormaster Paints Limited | High Peak | 2000 |
| Floors Direct (NI) Ltd | Omagh | 2005 |
| Floortrain (International) Limited | Doncaster | 2008 |
| Floortrain (UK) Limited | Doncaster | 2008 |
| Floorwala Limited | London | 2025 |
| Floozbox Limited | Hastings | 2012 |
| Flopat Ltd | Coventry | 2015 |
| Flor DO Amor Limited | Enfield | 2019 |
| Flora Cura Holding Ltd | London | 2005 |
| Flora Hifi Limited | London | 2025 |
| Flora Rosabel Richardson Limited | Petersfield | 2023 |
| Florabelle's Farm Ltd | Glasgow | 2024 |
| Floractive Ltd | Brighton | 2023 |
| Floral Academy Ltd | Southgate | 2021 |
| Floral Court Collection Management Limited | London | 2018 |
| Floralena's Ltd | Orpington | 2025 |
| Floran (Germany) Plant Nutrition Co., Ltd | Beckenham | 2021 |
| Florarex Ltd | London | 2026 |
| Floraverde Limited | Redditch | 2009 |
| Florel & Hardy Limited | Market Rasen | 2015 |
| Florence Annette Hurley Limited | Bexhill-On-Sea | 2025 |
| Florence House Management Limited | Chichester | 2013 |
| Floresta Limited | Belfast | 2007 |
| Florian Insulation Solutions (UK) Limited | St. Helens | 2023 |
| Florianopolis Ltd | London | 2025 |
| Florida Pearl Limited | Stockport | 2016 |
| Florii Limited | Nottingham | 2024 |
| Florin & Florin Limited | Dunstable | 2009 |
| Florin Bygg & Utleie Limited | London | 2020 |
| Florin Enterprises Ltd | Salford | 2004 |
| Floris Animal Health Limited | Bristol | 2020 |
| Florista Invest Limited | London | 2024 |
| Florita Property Investments Ltd | London | 2025 |