| Feilden+Mawson LLP | London | A rating |
| FEILO SYLVANIA UK LIMITED | Newhaven | A rating |
| Feisean nan Gaidheal | PORTREE | A rating |
| Feist Hedgethorne Limited | BRIGHTON | A rating |
| Feix&Merlin Ltd | London | A rating |
| FELAMENT LIMITED | Luton | A rating |
| Felbury House LImited | Dorking | A rating |
| Felcro UK Ltd | Slough | A rating |
| Feld Entertainment UK Limited | London | A rating |
| Felder UK Ltd | Milton Keynes | A rating |
| Feldon Practice | Halesowen | A rating |
| Feldon Valley (UK) Ltd | Lower Brailes | A rating |
| Felicleen Limited | Manchester | A rating |
| Felikot Healthcare Limited | Slough | A rating |
| Felix Capital Partners LLP | London | A rating |
| Felix Consultants Private Limited | Solihull | A rating |
| Felixstowe and Corinthians Cricket Club | Felixstowe | A rating |
| Felixstowe International College | Felixstowe | A rating |
| Felixstowe road medical practice | Ipswich | A rating |
| Felixstowe Specsavers Limited | Felixstowe | A rating |
| FELKAM LTD | London | A rating |
| Fell Lane Mini Market LTD | Leeds | A rating |
| Felling Cricket Club CIC | Gateshead | A rating |
| Fello Travel Limited | London | A rating |
| Fellow Studio Ltd | London | A rating |
| Fellows Construction Consultants Ltd | Birmingham | A rating |
| Fellowship of Churches of Christ | Birmingham | A rating |
| Fellpack Limited | Keswick | A rating |
| Felsted School | Dunmow | A rating |
| Felt Care Ltd | Nottingham | A rating |
| Feltham Dental Care | Feltham | A rating |
| FELTHAM HALAL MEAT (UK) LTD | London | A rating |
| FELTHAM RETAIL LTD | Feltham, | A rating |
| FELYX CAPITAL LIMITED | Sutton Coldfield | A rating |
| FEMACK TRAINING AND RECRUITMENT CONSULTANCY LIMITED | Crayford | A rating |
| Fembistem Ltd | Lancaster | A rating |
| FEME LTD | LONDON | A rating |
| Femina Hair & Beauty Limited | Uxbridge | A rating |
| Feminist Review Limited | London | A rating |
| FEMLUXE LIMITED | Manchester | A rating |
| Fen House Dental Practice | Gosberton | A rating |
| FEN HOUSE DENTAL PRACTICE | Spalding | A rating |
| Fence Gate Limited | Burnley | A rating |
| Fencepiece Road Medical Centre | Hainault | A rating |
| Fenchem GB Limited | Manchester | A rating |
| Fenchurch Advisory Partners LLP | London | A rating |
| Fenchurch Law (UK) Ltd | London | A rating |
| Fencing Mart Limited | Oldham | A rating |
| Fencom Ltd | Bolton | A rating |
| Fender Musical Instruments Europe Ltd | East Grinstead, | A rating |
| Fendi UK Limited | London | A rating |
| Fenergo UK Limited | London | A rating |
| Fenesse Ltd | Hove | A rating |
| Fengchenwang Limited | London | A rating |
| Fengsheng Limited | Essex | A rating |
| FENHAM CONTINENTAL FOOD STORE LTD | Newcastle upon Tyne | A rating |
| Fenham Lodge Residential Care Homes Ltd | Chelmsford | A rating |
| Fenham Stores Ltd T/A Family Shopper Columbia | Washington | A rating |
| FENHAM STORES NEWCASTLE LTD | Newcastle Upon Tyne | A rating |
| Fenix Freight Limited | Halesowen | A rating |
| Fenix Group Ltd | London | A rating |
| Fenix Insight Ltd | Copthorne | A rating |
| FENIX RETAIL LIMITED | Middleton | A rating |
| Fenix Sonipar Ltd | London | A rating |
| FENIXIA LIMITED | Sandhurst | A rating |
| FENIXSAN LIMITED | Warwickshire | A rating |
| Fenland Group Practice | Doddington | A rating |
| Fenland PCN Ltd | Cambs | A rating |
| Fenland RP Ltd T/A FRP | Wisbech | A rating |
| Fenmarc Produce Ltd | Wisbech | A rating |
| Fenn Direct Ltd | March | A rating |
| FENNEL FINANCIAL SERVICES LTD | Rochester | A rating |
| Fennex Ltd | Aberdeen | A rating |
| Fennies Day Nurseries Limited | Epsom | A rating |
| FENPARK STORES LTD T/A PREMIER | Fenton | A rating |
| Fenris Creations UK Ltd | London | A rating |
| FENS HEAHCARE AND RECRUITMENT LIMITED | Mitcham, | A rating |
| Fensco Ltd | Langley | A rating |
| Fentics Technology Limited | London | A rating |
| Fenton Holloway Ltd | Bristol | A rating |
| Fenton Pharmaceuticals Limited | 1A Frognal | A rating |
| Fenton Property Limited | Portsmouth | A rating |
| Fenton Veterinary Practice Limited | Haverfordwest | A rating |
| FENWAYXN LTD | London | A rating |
| Fenwick Elliott LLP | London | A rating |
| Feoh Investments UK LLP | London | A rating |
| FEONMED HEALTHCARE LTD | Preston | A rating |
| Fera Science Ltd | York | A rating |
| Ferah Butchers Ltd | LONDON | A rating |
| Ferah Hair & Cosmetics Ltd | Enfield | A rating |
| Feral Interactive | London | A rating |
| FERATI DRYLINING LTD | Woodford Green | A rating |
| Ferdotti Motor Services LTD | West Bromwich | A rating |
| Ferdus Limited T/A Continantal Foods | Somerset | A rating |
| Ferguslie Cricket Club | Paisley | A rating |
| Ferguson Engineering Consultants Ltd | Newcastle | A rating |
| Ferguson Marine (Port Glasgow) Limited | Port Glasgow | A rating |
| Ferhat Furnishing | LONDON | A rating |
| Fermentation Technologies Ltd | Oxford | A rating |
| FERMI LABS RESEARCH LTD | Harrow | A rating |
| Fermionx | Worthing | A rating |
| Fern Care Services Limited | Barking | A rating |
| Fern Computer Services Limited | Belfast | A rating |
| Fern Cottage Dental Practice | Hoyland | A rating |
| Fern Gardens Care Home | Feltham | A rating |
| Fern Hill House Care Home | Bacup | A rating |
| FERN LEAF CAREHOME LIMITED | ILFORD | A rating |
| FERNANDES FOOD LIMITED t/a Ferns Bakehouse | Newbury | A rating |
| FERNANDEZ GRILLHOUSE LTD TA FERNANDEZ GRILLHOUSE | Leicester | A rating |
| FERNANDO & SONS PROPERTY LIMITED T/A AGS PARK LANE CONVENIENCE STORE | Sunderland | A rating |
| FERNANDO BROS LIMITED T/A SHELL | WEST SUSSEX | A rating |
| Fernando Jorge Ltd | London | A rating |
| FERNANDO PRIVATE LIMITED T/A Rontec Crossbush - bp | LITTLEHAMPTON | A rating |
| Fernbank Medical Centre | Glasgow | A rating |
| Fernbank Surgery | Lytham | A rating |
| Fernbrook Care Homes Limited | Southend on Sea | A rating |
| Fernbury Limited | Cardiff | A rating |
| Ferndale Healthcare Limited | CRAWLEY | A rating |
| Fernfutures Ltd | St Albans | A rating |
| Fernhill Grocers Limited | Glasgow | A rating |
| Fernhill Systems (Scotland) Ltd | Edinburgh | A rating |
| Fernlea Surgery | London | A rating |
| Fernlea Veterinary Clinics | Bristol | A rating |
| Fernley Medical Centre | Birmingham | A rating |
| Ferns IT Consultancy Limited | Colchester | A rating |
| Ferns Surfacing Ltd | Maidstone | A rating |
| Fernsby Brookes Limited | Rugby | A rating |
| Fernside Veterinary Centre Ltd | Borehamwood | A rating |
| Ferovinum Limited | London | A rating |
| FERRAGAMO U.K. LIMITED | LONDON | A rating |
| Ferrari Group PLC | London | A rating |
| Ferrari N.V. UK Branch trading as Ferrari North Europe | Slough | A rating |
| Ferras & Pizzi Limited | Purley | A rating |
| Ferrer Pharma Great Britain Limited | Harrogate | A rating |
| Ferrero UK Limited | Greenford | A rating |
| FERRIER PUMPS LIMITED | Edinburgh | A rating |
| Ferring Pharmaceuticals Ltd | WEST DRAYTON | A rating |
| FERROGLOBE PLC | London | A rating |
| FERROL LODGE CARE HOME LIMITED | Sale | A rating |
| Ferrovial Construction UK Ltd | London | A rating |
| FERRY ROAD MINI MARKET LTD | EDINBURGH | A rating |
| Ferson Limited | Bristol | A rating |
| Fertifa Limited | London | A rating |
| Fertility Bristol limited | Bristol | A rating |
| Fervid Healthcare Ltd | Stoke-On-Trent | A rating |
| FERVID LIMITED | Aberdeen | A rating |
| FERYTRANS LTD | Southampton | A rating |
| FESMARG COMMUNICATIONS LTD | Burton On Trent | A rating |
| Festa System UK LTD | Huddersfield | A rating |
| Festads UK Limted | Aberdeen | A rating |
| FESTINA DRINKS LTD | SOUTHAMPTON | A rating |
| Festival Church | Chester | A rating |
| Festival Republic Ltd | London | A rating |
| Festo Ltd | Northampton | A rating |
| Festygreat Divers Enterprise limited | Nottingham | A rating |
| Fetal Medicine Foundation | London | A rating |
| Fether Labs Limited | London | A rating |
| FETIH TEXTILE UK LTD | London | UK Expansion Worker: Provisional |
| Fettes College | Edinburgh | A rating |
| Fetton Ltd t/a Cafe Istanbul | Manchester | A rating |
| FEV UK Ltd | Coventry | A rating |
| Fevered Sleep | London | A rating |
| FEVERTREE LIMITED | London | A rating |
| Fevertree Ltd | London | A rating |
| Few & Far Group Limited | Woodford Green | A rating |
| Fewcott Healthcare Ltd. | Fewcott | A rating |
| Fews Marquees Ltd | Bromsgrove | A rating |
| Fexco Merchant Services Limited | London | A rating |
| Fexco Property Services Limited | Salisbury | A rating |
| Fez Transport Ltd | Preston | A rating |
| FF Clarion Limited | London | A rating |
| FF Corse Limited | Tring | A rating |
| FF Furbnow | Birmingham | A rating |
| FF London ltd | Ewell | A rating |
| FF Management Limited | London | A rating |
| FF SECURITY SOLUTIONS LTD | Harpenden | A rating |
| FF Wise Limited | London | A rating |
| FFC Ireland 1 Ltd | Belfast | A rating |
| Ffern Ltd. | Taunton | A rating |
| FFM PASTA CO | London | A rating |
| FFY GROUP LIMITED | MANCHESTER | A rating |
| FG AUTO SOLUTIONS LTD | Birmingham | A rating |
| FG ENGINEERING+ LIMITED | London | A rating |
| FG HOME CONSTRUCTION LIMITED | Coventry | A rating |
| FG LONDON LTD | London | A rating |
| FG Mechanical Building Services Limited | Magherafelt | A rating |
| FG Palmer & Sons Ltd | Buckfastleigh | A rating |
| FG Pryor & Son Ltd | Truro | A rating |
| FG4 UK Limited | Moreton-in-Marsh | A rating |
| FGEROD & FGEROD LIMITED | LONDON | A rating |
| fgh inns ltd | Chiddingfold | A rating |
| FGL Marine Services Ltd | Kingston | A rating |
| FGLT Ltd | Gloucester | A rating |
| FGOSIO Design Limited | London | A rating |
| FGS Agri Limited | Ashford | A rating |
| FGS Global (UK) Limited | London | A rating |
| FGS Haulage LTD | Wednesbury | A rating |
| FGS INGREDIENTS LIMITED | Leicester | A rating |
| FH & Co Chartered Certified Accountants | Manchester | A rating |
| FH Bistro Limited T/A The Farmhouse Bistro | Birmingham | A rating |