| FH Capital Limited T/A Baloci | Birmingham | A rating |
| FH Law Solicitors is a trading name of FH Law Ltd | London | A rating |
| FH LONDON LTD | London | A rating |
| FH METAL LTD | London | A rating |
| FH Packaging LTD | Stockport | A rating |
| FH WIMBLEDON LTD | London | A rating |
| FH20 Limited | London | A rating |
| FHA HOLDINGS LTD | NOTTINGHAM | A rating |
| FHA INVESTMENTS LTD | NOTTINGHAM | A rating |
| FHDC Ltd t/a Far Headingley Dental Care | Leeds | A rating |
| FHI 360 UK Ltd | London | A rating |
| FHI Real Estate Limited | London | A rating |
| fho racing | louth | A rating |
| FHP Engineering Services Solutions Limited | London | A rating |
| FHP Group LLP | London | A rating |
| FHS Dynamics Ltd | Slough | A rating |
| FHT ENTERPRISE LIMITED | LONDON | A rating |
| FIA Foundation | London | A rating |
| FIA TECHNOLOGY SERVICES, LLC | Bristol | A rating |
| FIAMM UK Limited | Cannock | A rating |
| FIAT CHRYSLER AUTOMOBILES SERVICES UK LIMITED | BASILDON | A rating |
| Fiat Vouge Limited | Ilford | A rating |
| Fiaz Alam property and construction | Stoke On Trent | A rating |
| Fibe | London | A rating |
| FiberLean Technologies Limited | Par | A rating |
| Fibre Assets Ltd, T/A Connect Fibre | London | A rating |
| Fibre Gas & Building Work Ltd | Rochdale | A rating |
| Fibre Marketing Limited | Cheltenham | A rating |
| Fibre Me Limited | Peterborough | A rating |
| Fibre Technology Limited | Pinxton, Nottingham. | A rating |
| Fibre-Tech Industries (UK) Limited | Melbourn | A rating |
| Fibrelite Composites Ltd | Skipton | A rating |
| Fibretrace Technologies Limited | London | A rating |
| Fibrisol Service Limited | London | A rating |
| Fibron BX Limited | Hoddesdon | A rating |
| Fibrus Networks Ltd. | Belfast | A rating |
| FIC Shareco Limited | Ringway | A rating |
| FIC UK LTD | Penzance | A rating |
| Ficep UK Ltd | Castleford | A rating |
| Fichtner Consulting Engineers Ltd | Stockport | A rating |
| Ficom Networks Ltd | Ringwood | A rating |
| Ficosa International Limited | Wickford | A rating |
| Fiction Films Ltd | Southwick | A rating |
| FID TRUST INTERNATIONAL LTD | LONDON | A rating |
| FIDANTE PARTNERS EUROPE LIMITED | LONDON | A rating |
| Fidbank UK Limited | London | A rating |
| Fidel Limited | London | A rating |
| Fidelia Care Ltd | Trowbridge | A rating |
| Fidelio Capital Limited | London | A rating |
| Fidelis Marketing Limited | London | A rating |
| Fidelity Care Services Ltd | Ludlow | A rating |
| FIDELITY CONSULTANCY LTD | London | A rating |
| FIDELITY GROUP LIMITED | Henley on Thames | A rating |
| Fidelity Payment | LONDON | A rating |
| Fidenda Limited | Hertfordshire | A rating |
| Fidera Management Limited | London | A rating |
| Fideres U.K. Ltd | London | A rating |
| FIDES BOX AND PACK LIMITED | CANTERBURY | A rating |
| Fidler & Pepper Limited | Sutton-In-Ashfield | A rating |
| Fido Tech | Bicester | A rating |
| FIDUCIA CAPITAL LLP | LONDON | A rating |
| Fiducia DLT Ltd | London | A rating |
| Fiducial Communications Limited | London | A rating |
| FIDUCIAM ADVISORY LIMITED | Watford | A rating |
| Fiduciam Nominees Limited | London | A rating |
| Fiecon Limited | London | A rating |
| FIEGE LOGISTICS DIRFT LIMITED | Birmingham | A rating |
| Field and Falcon Adventure Store | Holt | A rating |
| Field and Lawn Ltd | Broxburn | A rating |
| Field Consulting Ltd | London | A rating |
| Field Effect Security Ltd | London | A rating |
| Field End Dental Clinic | Pinner | A rating |
| FIELD EQUINE VETS LIMITED | Blakedown, Nr Kidderminster | A rating |
| Field Gibson Media Limited | London | A rating |
| Field House Residential Care Home Limited | Fleet Hargate | A rating |
| Field Intelligence Ltd | London | A rating |
| Field International Limited | Dorset | A rating |
| Field News Limited t/a Earlham Shopper | Norwich | A rating |
| Field Street Surgery | Loughborough | A rating |
| Field Systems Designs Limited | Surrey | A rating |
| Field View Care Home Ltd | Redditch | A rating |
| FIELD.io Limited | London | A rating |
| FIELDBASE SERVICES LTD | London | A rating |
| Fieldbay Management Limited | Bristol | A rating |
| Fieldfisher LLP | London | A rating |
| FIELDHOUSE ASSOCIATES LIMITED | London | A rating |
| Fieldhouse Care Ltd (T/A The Chestnuts Care Home) | Normanton | A rating |
| Fieldmotion Ltd | Newry | A rating |
| Fieldrose Limited | Sheffield | A rating |
| Fields Care Ltd | Harrow | A rating |
| FIELDSTORE LTD T/A BODYWISE HEALTH FOODS | MIDDLESEX | A rating |
| Fieldwork Robotics Limited | Cambridge | A rating |
| FieldworkHub Ltd | London | A rating |
| FIENA BSKD LTD | London | A rating |
| Fiera Capital (UK) Limited | London | A rating |
| Fiera Contract Ltd | London | A rating |
| Fierce (Festival) Ltd | Birmingham | A rating |
| Fierce Beer Limited | Aberdeen | A rating |
| Fierce Digitology Limited | Manchester | A rating |
| Fiery Angel Limited | London | A rating |
| Fiery Tandoor Ltd | Reading | A rating |
| FIESTA LOCA LTD | Orpington | A rating |
| Fietta LLP | London | A rating |
| FIFE BUSINESS CONSULTANTS LTD | DUNERMLINE | A rating |
| Fife Council | Glenrothes | A rating |
| FIFE CURRY HOUSE LTD | Dunfermline, Scotland | A rating |
| Fife Flyers Ltd | Kirkcaldy | A rating |
| FIFE HARDWARE LTD T/A Totally Hardware | Burntisland | A rating |
| Fife Lodge Hotel | Banff | A rating |
| FIFEDIY LTD T/A Nickel & Dime | Kirkcaldy | A rating |
| Fifosys Limited | London | A rating |
| Fifth Dimension AI Ltd | London | A rating |
| FIFTH GENERATION MEDIA LTD | ILFORD | A rating |
| FIFTH ROW TECHNOLOGIES LIMITED | London | A rating |
| FIFTH SEASON UK, LTD. | London | A rating |
| FIFTHDELTA LTD | London | A rating |
| FIFTHGEAR FENTON LTD | STOKE-ON-TRENT | A rating |
| Fifty Degrees North IOW LTD T/A The Wellington Hotel | Ventnor | A rating |
| Fifty Five and Five Ltd. | London | A rating |
| Fifty Five Hospitality Limited | London | A rating |
| Fifty Technology Limited | London | A rating |
| Fifty-five UK Ltd T/A Fifty-five | London | A rating |
| FIFTY-TWO SPECIALIST CARS LTD | Stoke-On-Trent, England | A rating |
| FIFTYNET LIMITED | London | A rating |
| Fiftytwo 7 Care Ltd | Hagley | A rating |
| Fig Power Limited | Bristol | A rating |
| Fig Tree Blossom LTD t/As Newbirth Care | Doncaster | A rating |
| Figges Marsh Surgery | Mitcham | A rating |
| Fighting Words Northern Ireland | Belfast | A rating |
| Figma UK Limited | London | A rating |
| Figment Europe Ltd | London | A rating |
| Figos Group Limited T/A Figo's Peri Peri | Glasgow | A rating |
| Figured Software UK Limited | London | A rating |
| Figures-and-Facts.com Limited | Ilford | A rating |
| Fiit Limited | London | A rating |
| Fike Safety Technology Ltd. | Gwent | A rating |
| FIL Investment Management Limited | London | A rating |
| FIL TRADING LTD T/As BIKENEARME | LONDON | A rating |
| Filament Consultancy Group Limited | London | A rating |
| FILAMENT PD LIMITED | GLASGOW | A rating |
| Filament Publishing | Croydon | A rating |
| Filament SD LTD | Glasgow | A rating |
| FILCARE LTD | Braintree | B rating |
| File Range Limited | London | A rating |
| Filey Veterinary Practice Limited | Filey | A rating |
| Filhet-Allard Maritime UK Limited | london | A rating |
| FILIKA LTD | LONDON | A rating |
| FILIPETTI LTD T/A Filipetti | Hamilton | A rating |
| Filipino Care Givers | Twickenham | A rating |
| Filishack Partners Ltd | London | A rating |
| Filisia Interfaces Ltd | London | A rating |
| Fill Function UK Ltd | London | A rating |
| Fillcare Limited | Pontclun | A rating |
| Fillets Fish and Chips Limited | Brighton | A rating |
| Fillings LTD | Croydon | A rating |
| Filltex Ltd | Dewsbury | A rating |
| Film & Foil Solutions Ltd | Haydock | A rating |
| Film Locker Ltd | London | A rating |
| Film Magic Ltd | Shepperton | A rating |
| Film Producers of UK Limited | Ilford | A rating |
| FILMCHAIN GROUP LTD | London | A rating |
| Filmfinity Productions Ltd | london | A rating |
| Filmlight Limited | London | A rating |
| FilmOn.TV Ltd | London | A rating |
| Filotimo | Sandbach | A rating |
| Filterlight Limited | West Wickham | A rating |
| Filtration Group Limited T/A Filtration Group | Stockport | A rating |
| Filtronic plc | Sedgefield | A rating |
| FIM PARTNERS UK LTD | London | A rating |
| Fime Services UK Limited | Guildford | A rating |
| FIMPLE GLOBAL LIMITED | London | A rating |
| FIMZO LTD | Swindon | A rating |
| Fin (London) Limited | London | A rating |
| FIN CENTER LIMITED | LONDON | A rating |
| Fin-Ex Property No.4(UK) Ltd | London | A rating |
| FIN-SOLUTIONS LTD | Ashton-Under-Lyne | A rating |
| Fin-Tek Corporation | Torquay | A rating |
| FIN2GO LTD | High Wycombe | A rating |
| Fina Furniture Ltd | Stratford-Upon-Avon | A rating |
| Finacta Ltd | Egham | A rating |
| Finaghy South Ltd | Belfast | A rating |
| FINAL TOUCHES TRADING LTD | Dundee | A rating |
| Finalto Financial Services Ltd | London | A rating |
| Finan Formworks Ltd | Bristol | A rating |
| Finance a Vehicle Ltd | Fareham | A rating |
| Finance Advice Helpline Limited | London, | A rating |
| Finance Box Limited | Rustington | A rating |
| Finance Car Shop Ltd | Leicester | A rating |
| Finance For Enterprise Limited | Doncaster | A rating |
| FINANCE HUB LTD | Ilford | A rating |
| FINANCE SOLUTIONS & ADVISORS LTD | Rainham | A rating |
| FINANCIAL ACCOUNTING (UK) LIMITED | Bolton | A rating |
| Financial Advisory Services Limited | London | A rating |
| Financial Conduct Authority | London | A rating |
| Financial Data Management Limited | London | A rating |
| FINANCIAL FUSION UK LTD | England | A rating |
| FINANCIAL HOUSE LIMITED | London | A rating |
| Financial Management (U.K.) Ltd T/a Commercial Direct | Beckenham | A rating |
| Financial Network Analytics Ltd | London | A rating |
| Financial Ombudsman Service | London | A rating |