| Freckleton Skip Hire Ltd | Preston | 2022 |
| Free Flow Environmental Ltd | Welwyn | 2018 |
| Free for ALL Community Recycling Ltd | Cumbria | 2003 |
| Free Water Project CIC | Kingston Upon Thames | 2025 |
| Freeconomy Recycling Ltd | London | 2026 |
| Freecycle UK | Stockton-On-Tees | 2006 |
| Freedom Recycling Limited | Thetford | 2005 |
| Freedom Resource Recovery Ltd. | Shoreham By Sea | 2012 |
| Freee Recycle Holding Limited | Harlow | 2021 |
| Freeflow Drainage Ltd | Shrewsbury | 2018 |
| Freehand Logistics Limited | Essex | 2026 |
| Freelending CIC | Cardiff | 2008 |
| Freeman Drainage Services Limited | London | 2008 |
| Freeston Water Treatment Limited | Southampton | 1986 |
| Freflow Ltd | London | 2022 |
| Freight Engineering Company Limited | Erith | 1990 |
| Fresco Environmental Ltd | Widnes | 2015 |
| Fresh & Go Toilets Hire Ltd | Southall | 2024 |
| Fresh Drains Ltd | London | 2020 |
| Fresh Earth Technologies Ltd | Newquay | 2017 |
| Fresh Enviro Ltd | Blackburn | 2025 |
| Fresh Rooms Limited | London | 2019 |
| Fresh Start Removals and Clearance Ltd | Ashford | 2025 |
| Fresh Start Social Enterprise NOT for Profit Ltd | Arundel | 2017 |
| Fresh Start Waste Services Ltd | Manchester | 2006 |
| Fresh Washroom Services Ltd. | Dagenham | 2021 |
| Freshbins UK Limited | Berkhamsted | 2003 |
| Freshbinz Limited | London | 2014 |
| Freshcrop Ltd | Croydon | 2025 |
| Freshly Squeezed Water Systems Limited | Fleet | 2004 |
| Freya Management Consulting Limited | Wolverhampton | 2024 |
| Frezeriq Ltd | Leigh | 2025 |
| Friendly Waste OIL Ltd | Sheffield | 2022 |
| Friendly Waste Services Ltd | London | 2020 |
| Friendly Water Limited | West Byfleet | 2007 |
| Friends Recycling Limited | Wolverhampton | 2025 |
| Frog Creek Innovations, Ltd | London | 2026 |
| Frogson Waste Management Limited | Fareham | 1983 |
| Frontline Drainage Limited | London | 2025 |
| Frontline Pipeline Water Services Ltd | Southend-On-Sea | 2021 |
| Froom & Co Limited | Hoddesdon | 1998 |
| Frow Resource Community Interest Company | Forest Row | 2021 |
| FRY Waste Limited | Swadlincote | 2008 |
| Frylite Environmental Limited | Strabane | 1997 |
| FS Destruction Ltd | Belper | 2021 |
| FS Waste Solutions Ltd | Maidstone | 2000 |
| FS1 Trade Limited | Leven | 2019 |
| FSD Facilities Limited | Bristol | 2017 |
| FSK Logistic Ltd | London | 2026 |
| FSW Tanking Limited | Broxbourne | 2025 |
| FT Refurbishing Ltd | Watford | 2017 |
| FTP International Ltd | Harrow | 2021 |
| Fudgy Busters Ltd | Rochester | 2024 |
| Fuel Doctor SW Limited | Bridgwater | 2013 |
| Fuel Drain Limited | Stevenage | 2010 |
| Fuel Specialist Services (South West) Limited | Falmouth | 2018 |
| Fuel Spill Digester Limited | Stourbridge | 2021 |
| Fuelogy Limited | Bradford | 2012 |
| Fuelport Ltd | Cardiff | 2025 |
| Fujitsu Microelectronics Limited | | 1983 |
| Fulcrum Site Services Ltd | Barking | 2018 |
| Fulcrum Site Solutions Ltd | Barking | 2024 |
| Full Circle Generation Ltd | Belfast | 2014 |
| Full Circle Packaging Limited | Rotherham | 2015 |
| Full Circle Power Limited | Garvagh | 2012 |
| Full Circle Recycling Ltd | Abergavenny | 2016 |
| Full Circle Solutions Limited | Doncaster | 2022 |
| Full Hygiene Services Limited | London | 2017 |
| Full Load Rubbish Removals Ltd | Leeds | 2023 |
| Full Recovery Services Ltd | Romford | 2025 |
| Full Scope Solutions Ltd | London | 2024 |
| Full Sweep Rubbish Removals Limited | Heathfield | 2025 |
| Fuller Clarendon Limited | Christchurch | 1986 |
| Fuller Grab Hire Limited | Sawbridgeworth | 2014 |
| Fullmooncards Ltd | Stalybridge | 2025 |
| Fuminex Limited | Leeds | 2005 |
| Fumitek Ltd | London | 2014 |
| Furness Tiles Limited | Lancashire | 1994 |
| Furnihelp MID Sussex | Haywards Heath | 2011 |
| Furniture Disposal Services Ltd | Dartford | 2025 |
| Furniture Plus Limited | Fife | 2001 |
| Furniture Realisations 4 Limited | 1 More Place | 1974 |
| Furniture Solutions NE Ltd | Newcastle Upon Tyne | 2006 |
| Fusion Clearance Limited | Morden | 2013 |
| Fusion Solutions Consulting Ltd. | Milton Keynes | 2012 |
| Futrient Ltd | London | 2022 |
| Futur First Limited | London | 2015 |
| Future Drainage & Groundworks Limited | York | 2023 |
| Future Green Investments U.K. Limited | Chalfont St. Giles | 2023 |
| Future Industrial Services Limited | Wetherby | 1999 |
| Future PVC Recycling Limited | Hooton | 2019 |
| Future Street Smart Waste Ltd | London | 2019 |
| Future Upvc Ltd | Liverpool | 2023 |
| Future Waste Services Ltd | Enniskillen | 2017 |
| Futurecrest Trade Limited | Cardiff | 2021 |
| Futurella PLC | Pershore | 2006 |
| Fuuel Ltd | Bromley | 2020 |
| FWS Services Ltd | Port Talbot | 2024 |
| FWX Recycling Limited | Brighouse | 2016 |
| FY Waste Removals Ltd | Fleetwood | 2024 |