| Fortrea Development Limited | Maidenhead | A rating |
| Fortress Care Limited | Manchester | A rating |
| Fortress Diagnostics Ltd | Co. Antrim | A rating |
| Fortress Fire and Security Limited | London | A rating |
| Fortress GB | London | A rating |
| Fortress Investment Group (UK) Limited | London | A rating |
| Fortress Technology (Europe) Limited | Banbury | A rating |
| Forts Developments Limited | Hatfield | A rating |
| Fortude PTE Limited | London | A rating |
| Fortum O&M (UK) Ltd | Grangemouth | A rating |
| Fortuna AC Ltd. | London | A rating |
| Fortuna Enterprises Ltd T/A Brunswick Moviebowl | Londonderry | A rating |
| Fortunate Masiye Consulting | Oxford | A rating |
| FORTUNE BD LIMITED T/A SOYFUL'S KITCHEN | Radstock | A rating |
| Fortune Bee Limited | London | A rating |
| FORTUNE BUSINESS SERVICES LIMITED | Cheshunt | A rating |
| FORTUNE CLOTHING LIMITED | Edgware | A rating |
| FORTUNE COMMERCIAL FINANCE LTD | Romford | A rating |
| FORTUNE CONSULTANCY LTD | Hounslow | A rating |
| Fortune Global Trading Ltd | Birmingham | A rating |
| FORTUNE H&G LTD | London | A rating |
| Fortune Healthcare | Northampton | A rating |
| FORTUNE INTERIORS LIMITED | Coventry | A rating |
| Fortune Media Group (UK) Limited | Dartford | A rating |
| FORTUNE RETAIL LIMITED | Potters Bar | A rating |
| FORTUNE SECURITY LIMITED | Hemel Hempstead | A rating |
| Fortune solutions limited | Birmingham | A rating |
| Fortune Stores | Wigan | A rating |
| FORTUNE TECHNO SERVICES LIMITED | Reading | A rating |
| Fortune Technology Ltd | Glasgow | A rating |
| Fortune UK Accountants Ltd | London | A rating |
| Fortune UK PVT LTD | Leek | A rating |
| FORTUNE VENTURES LIMITED | Dunfermline | A rating |
| Fortune300 Ltd t/a Klassic Dry Cleaners | HARROW | A rating |
| Fortuous Ltd | Ilford | A rating |
| Fortura Financial Partners Limited | Cirencester | A rating |
| Fortus Midlands Limited | Northampton | A rating |
| FORTWELL SOLICITORS LIMITED | HORNSEY | A rating |
| Forty Eight Point One Ltd | London | A rating |
| Forty Four Tech Ltd | Heathrow | A rating |
| Forty Willows Surgery | London | A rating |
| Forum CIO | Hull | A rating |
| Forum Contracts Ltd | Wickford | A rating |
| Forum Energy Technologies (UK) Limited | Westhill | A rating |
| Forum Europe Ltd | Cardiff | A rating |
| FORUM FOR SUSTAINABLE NEW VENTURE | Erith | A rating |
| Forum for the Future | London | A rating |
| Forum Health Centre | Coventry | A rating |
| Forum Partners Limited | London | A rating |
| FORVIS Global Advisory UK Limited | London | A rating |
| Forvis Mazars LLP | London | A rating |
| Forward Associates Group Ltd | Bourne End | A rating |
| Forward Care London ltd | Uxbridge | A rating |
| Forward Carers C.I.C. | Birmingham | A rating |
| FORWARD CONSTRUCTION AGENCY LTD | Oldbury | A rating |
| Forward In Faith Ministries International UK | Tividale | A rating |
| Forward Microsystems Ltd | Leicester | A rating |
| Forward Movement Limited | Westcliff-On-Sea | A rating |
| Forward Pharmacy Ltd | LONDON | A rating |
| Forward Plus West Midlands Limited | Birmingham | A rating |
| Forward3D Ltd trading as Assembly | London | A rating |
| Forwessun International Limited | Speke | A rating |
| Fospha Limited | London | A rating |
| Fosroc International Ltd | Tamworth | A rating |
| FOSS LED LTD | Wells | A rating |
| Foss U.K. Limited | Runcorn | A rating |
| Fosse Court | Leicester | A rating |
| Fosse Dental Care | Leicester | A rating |
| Fosse Healthcare Limited | LEICESTER | A rating |
| Fosse Meadows Ltd | Lutterworth | A rating |
| Fossil Consultancy UK | London | A rating |
| Fossil Forecourts Ltd | Coventry | A rating |
| Fossil Production LTD | London | A rating |
| FOSSIL SKIN CLINCS LTD | Barking | A rating |
| Foster + Partners Limited | London | A rating |
| FOSTER AND FREEMAN LTD | EVESHAM | A rating |
| Foster Denovo Limited | Addlestone | A rating |
| FOSTER DESIGN ASSOCIATES LIMITED | Lichfield | A rating |
| Foster Findlay Associates | Newcastle upon Tyne | A rating |
| Foster Lomas Ltd | London | A rating |
| FOSTER LONDON LIMITED | London | A rating |
| Foster Wilson Size LLP | London | A rating |
| Foster's Primary School | Welling | A rating |
| FOSTERING INNOVATIONS LIMITED | UXBRIDGE | A rating |
| Fosters Off Licence | Rhyl | A rating |
| FOSTOK HALAB LTD | London | A rating |
| Fostro Technologies Ltd | Feltham | A rating |
| Fosun Management (UK) Limited | London | A rating |
| Fotex Limited | Batley | A rating |
| Fothergill Engineered Fabrics Ltd | Littleborough | A rating |
| Foto Collective Limited | Harrow | A rating |
| FotoFinder Systems Ltd | London | A rating |
| Fotostation Limited | Croydon | A rating |
| Foulis Limited | Berwick-Upon-Tweed | A rating |
| Found Entertainment Limited | London | A rating |
| Found Group Limited | London | A rating |
| Found Studio Limited | London | A rating |
| Found8tions Youth Support Services Ltd. | London | A rating |
| Foundation 92 | Worsley | A rating |
| Foundation for Genomics and Population Health | Cambridge | A rating |
| Foundation for International Education | London | A rating |
| Foundation for Liver Research | London | A rating |
| Foundation Matters | Barrow on Trent | A rating |
| Foundation of Lady Katherine Leveson | Solihull | A rating |
| Foundations What Works Centre for children and families | London | A rating |
| FOUNDDIGITAL DS LTD | London | A rating |
| Founders For Good Ltd. | London | A rating |
| Founders Forum Events LLP | London | A rating |
| FOUNDERS HEALTH HOLDING LIMITED | LONDON | A rating |
| Founders Keepers LLP | London | A rating |
| Founders Law Limited | London | A rating |
| Founders4Schools | London | A rating |
| Foundervine CIC | London | A rating |
| FOUNDEVER GB LIMITED | Coventry | A rating |
| FoundOcean Ltd | Livingston | A rating |
| Foundrax Engineering Products Limited | Somerton | A rating |
| Foundry (UK) Ltd | London | A rating |
| Foundry Bargain Store Ltd | Croydon | A rating |
| Foundry Lane Surgery | Leeds | A rating |
| Foundry Services Limited | London | A rating |
| Foundry Sourcing Ltd. | ALTRINCHAM | A rating |
| FOUNT UK Limited | London | A rating |
| Fountain Care Services | Rainham | A rating |
| FOUNTAIN DESSERTS AND SWEETS LTD | EDINBURGH | A rating |
| Fountain Lodge Care Home Ltd | Coventry | A rating |
| Fountain Montessori Ltd | edgware | A rating |
| Fountain Nursing Home | Birmingham | B rating |
| FOUNTAIN OF HEALTH LTD | Ipswich | A rating |
| Fountain of Love, RCCG | Aberdeen | A rating |
| Fountain Partnership Ltd | Norwich | A rating |
| FOUNTAIN SERVICES LTD T/A THE CLEAN MACHINE | WESTBURY | A rating |
| FOUNTAINE BLEAU LTD | London | A rating |
| Fountaineers Ltd | Beckenham | A rating |
| Fountainhead software ltd | Bristol | A rating |
| Fountainlife LTD | London | A rating |
| Fountains of Knowledge | Nelson | A rating |
| Four Aces Trading Limited | Southall | A rating |
| Four Acre Health Centre | St Helens | A rating |
| Four Agency Worldwide Limited | London | A rating |
| FOUR BLUE RECRUITMENT LTD | Colchester | A rating |
| Four Capital Limited | Mitcham | A rating |
| Four Counties Restaurant Ltd / Four Counties Spice | Tamworth | A rating |
| Four Crest Care (Watton) Ltd | Chigwell | A rating |
| Four Crest Care (Wisbech) Ltd | Wisbech | A rating |
| FOUR CROSSES FILLING STATION LIMITED | Shropshire | A rating |
| Four Elements Spa Limited | London | A rating |
| Four Gates Limited | Manchester | A rating |
| Four Guys Pizzeria Limited | Glasgow | A rating |
| four heads limited | Oldham | A rating |
| Four Hills Care | Westbury | A rating |
| Four Hillside Assets Ltd T/A The Hickstead Hotel | Slough | A rating |
| Four Hundred Communications Limited | London | A rating |
| Four J's Development Tools (UK) Ltd | Dartford | A rating |
| FOUR LADS LIMITED | COVENTRY | A rating |
| Four Legs (Tollingtons) Limited | London | A rating |
| Four Oaks Healthcare Limited | Birmingham | A rating |
| Four Pillars Brewery Limited | London | A rating |
| Four Points Flex (By Sheraton) | Brighton | A rating |
| Four Quarters Polo LLP | Windsor | A rating |
| Four S Auto Service Ltd | Croydon | A rating |
| Four Seasons | Liverpool | A rating |
| Four Seasons (Queensway) Limited | LONDON | A rating |
| Four Seasons Hastings Ltd | London | A rating |
| Four Seasons Hotel London at Tower Bridge | London | A rating |
| FOUR SPICES (EXMOUTH) LIMITED | EXMOUTH | A rating |
| FOUR SPICES LIMITED T/a Simla Restaurant & Zenna Bar | Tamworth | A rating |
| FOUR STARS SUB LTD t/a Subway | LONDON | A rating |
| Four Swannes Primary School | WALTHAM CROSS | A rating |
| Four Tomatoes Limited | Hailsham | A rating |
| Four way Bar and Grill Limited | Rowley Regis | A rating |
| FOUR WINGS LIMITED | Iver | A rating |
| Four-Square Design & Build Ltd | London | A rating |
| Fouracres Care Services | Middlesex | A rating |
| FourFour Digital Management Limited | Brighton | A rating |
| Fourier Ltd | Walton on Thames | A rating |
| FourJaw Manufacturing Analytics Ltd | Sheffield | A rating |
| FourQuest Energy (UK) Limited | Billingham | A rating |
| Foursquare Church (Great Britain) | Dunstable | A rating |
| Foursquare Gospel Church (Praise Chapel) | London | A rating |
| Fourstones Paper Mill Co Ltd | HEXHAM | A rating |
| Fourteen Agrinsect Limited | Skegness | A rating |
| Fourteen IP Communications Ltd | Wigan | A rating |
| Fourth and Church | Hove | A rating |
| Fourth Floor Creative Limited | Bristol | A rating |
| Fourth Limited | London | A rating |
| Fourth Monkey Education Limited | London | A rating |
| FOURTH OF MARCH LIMITED/Trading Name RACIL | London | A rating |
| Fourth Wall Entertainment Limited | Liverpool | A rating |
| Fourtold Limited | London | A rating |
| Fourtold Ltd | London | A rating |
| Fourtrees Group Limited | London | A rating |
| FOURVENUES UK LTD | London | A rating |
| FOURWAYS LEICESTER LTD | LEICESTER | A rating |
| FOURWAYS MOT CENTRE LTD | Oldham | A rating |
| Fourways Residential Home | Sidmouth, | A rating |
| Fourways Residential Home Ltd T/a Fourways Residential Home | Sandhurst | A rating |
| FOURWINDS ENERGY LTD T/A BOILUP ENERGY SOLUTIONS | Barking | A rating |
| FOUTA QUALITY CARE LTD | Leicester | A rating |
| FOUZI'S LLANGOLLEN LIMITED | CLWYD,WALES | A rating |
| FOUZI'S LLANGOLLEN LIMITED | LLANGOLLEN | A rating |