| Ignis Ltd. | London | A rating |
| IGNISNOVA LIMITED | London | A rating |
| Ignite Health & Home care Services Ltd | Wednesbury | A rating |
| Ignite Health Care Ltd | Manchester | A rating |
| IGNITE LONDON LIMITED T/A Indigo Indian Dining | Saffron Walden,England | A rating |
| Ignite Marketing UK Limited | London | A rating |
| Ignite Nursing | Stoke on Trent | A rating |
| IGNITE TECHNOLOGIES INTERNATIONAL LIMITED | London | A rating |
| Ignitec ltd | Bristol | A rating |
| IGNITER100 UK LTD | London | A rating |
| Ignitho Technologies UK Ltd | Falmer | A rating |
| Ignition Creative London Ltd | London | A rating |
| Ignition Group Ltd | Wetherby | A rating |
| Ignition Motors Ltd | Tilbury | A rating |
| Ignition Wealth UK Limited | London | A rating |
| Ignitus Labs Ltd. | London | A rating |
| Ignota Labs Limited | Cambridge | A rating |
| Ignys Ltd | Nottingham | A rating |
| IGNYTO LIMITED | London | A rating |
| Igo Travel Ltd | Wembley | A rating |
| IGOPHYSIO LIMITED | London | A rating |
| IGOROTASHI LTD | Whitstable | A rating |
| IGotfixed Limited | Cardiff | A rating |
| IGPC PCN | Liverpool | A rating |
| IGR London Limited | London | A rating |
| IGREJA BATISTA EM MISSAO | London | A rating |
| iGrid Technology Consulting Ltd | Glasgow | A rating |
| IGS CONSTRUCTION LTD | London | A rating |
| IGS Works Limited | Glasgow | A rating |
| IGSN UK LTD | Newcastle Upon Tyne | A rating |
| IGT Solutions Private Limited | London | A rating |
| IGT-UK Gaming Ltd | Salford | A rating |
| Iguana Investments Ltd | Cambridge | A rating |
| igus UK Limited | Northampton | A rating |
| iGuzzini illuminazione U.K. Limited | Guildford | A rating |
| IGWT ACCOUNTANTS LTD | Peterborough | A rating |
| IGX Global Limited | London | A rating |
| IGY Services UK Limited | ROMSEY | A rating |
| IGY SKD Management Company Limited | Andover | A rating |
| IH TRAVELS LTD | Dudley | A rating |
| iHasco | bracknell | A rating |
| Ihateironing.com Ltd | London | A rating |
| IHH-VAC LIMITED | BRIDGWATER | A rating |
| ihi Care Services | Birmingham | A rating |
| IHI Europe Ltd. | London | A rating |
| IHI GROUP LTD T/A HEAVENLY DESSERTS PRESTON | Preston | A rating |
| IHK Enterprise Ltd | Crawley | A rating |
| IHK LTD TA SIBU | Batley | A rating |
| Ihle Violins Ltd | London | A rating |
| IHOMES LONDON MEDIA ROOMS LIMITED | LONDON | A rating |
| IHP Limited | Bovingdon | A rating |
| IHS Africa (UK) Limited | Surrey | A rating |
| IHS GLOBAL LIMITED | London | A rating |
| IHS HAIR REPLACEMENT LTD | London | A rating |
| Ihsaan Inn T/A Massala | Ipswich | A rating |
| Ihsan International Limited | Greater London | A rating |
| Ihsan Pharma LTD | Northwich | A rating |
| Ihsan Ullah Yousafzai T/A Blue Boy Ice Cream | Birmingham | A rating |
| IHSS Limited | Park Royal | A rating |
| IHybrid Ltd | Edinburgh | A rating |
| II-VI UK Laser Enterprise Ltd | Paignton | A rating |
| IIA ACCOUNTANCY LIMITED | DERBY | A rating |
| IIEE Global Engineers Ltd | Essex | A rating |
| IIH GLOBAL LIMITED | RICKMANSWORTH | A rating |
| IIISIX3 Food and wine | Essex | A rating |
| IIJ Europe Limited | London | A rating |
| IIMAN LIMITED | London | A rating |
| Iino UK Limited | London | A rating |
| IIT Software Limited | London | A rating |
| IJ & AE Henderson Limited | Carlisle | A rating |
| IJAZ HALAL POULTRY LTD | BRADFORD | A rating |
| IJAZZ RESTAURANT LTD | Wrexham | A rating |
| IJO INTERIORS LIMITED | Barnet | A rating |
| IJP CORPORATION LTD | London | A rating |
| IJZ Virdee Limited T/A Swinford Pharmacy | Stourbridge | A rating |
| IK Fast Track Services Ltd | Birmingham | A rating |
| IK Investment Partners | London | A rating |
| IK Trading Ltd | London | A rating |
| IK Welfare Trust | Harbour Exchange | A rating |
| IKA England Ltd | Oxford | A rating |
| IKAM Subs Limited T/A Subway | West Bromwich | A rating |
| Ikaro Group Ltd | Barnsley | A rating |
| Ikarus Capital Advisory | Richmond | A rating |
| Ikash t/a TaxAssist Accountants | Pinner | A rating |
| Ikawa Ltd | London | A rating |
| IKBAL GLOBAL LTD T/A MOZA INDIAN RESTAURANT AND TAKEAWAY | Bury Saint Edmunds | A rating |
| IKEA Ltd. | London | A rating |
| IKEM'S CARE LIMITED | COLCHESTER | A rating |
| Iken Business Ltd | Bristol | A rating |
| IKEPO AFRODELIGHT FOODS LTD | Sheerness | A rating |
| Ikhlas Education Centre Limited | Derby | A rating |
| Ikigai Data Ltd | London | A rating |
| IKIGAI DIGITAL LIMITED | Malmesbury | A rating |
| Ikiru People Limited | Basingstoke | A rating |
| IKIZ TRADERS LTD | Manchester | A rating |
| Ikkar London Ltd | London | A rating |
| IKKAYEES LTD | LIVERPOOL | A rating |
| IKLECTIK ART LAB CIC | LONDON | A rating |
| IKM Holdings Ltd. T/As German Doner Kabab | Ilford | A rating |
| IKM TESTING UK LIMITED | Cramlington, | A rating |
| IKNOW TECHNOLOGY UK LTD | London | A rating |
| IKO PLC | Wigan | A rating |
| IKOA DESIGN LIMITED | London | A rating |
| Ikon Arts Management | London | A rating |
| Ikon Science Limited | Surbiton | A rating |
| Ikonic Technology Ltd | Heywood | A rating |
| IKOS CONSTRUCTION LONDON LIMITED | WATFORD | A rating |
| IKOS Consulting UK Limited | Derby | A rating |
| Ikoyi | London | A rating |
| IKRA UK LTD | Ashford | A rating |
| IKRUPA TRADING LIMITED | Cannock | A rating |
| IKRUSH LIMITED | GLASGOW | A rating |
| IKSHOREDITCH LIMITED t/a MUKU HAIR SALON | LONDON | A rating |
| Ikstar Limited | Leicester | A rating |
| IKSYSTEMS LIMITED | Hertfordshire | A rating |
| IKube Limited | Derby | A rating |
| Ikue Limited | Bristol | A rating |
| IKWA | Newcastle upon Tyne | A rating |
| IKY (UK) Ltd | Bradford | A rating |
| Il Botanico ltd | Oxford | A rating |
| Il Fornaio Limited | London | A rating |
| Il Forno Restaurant | Liverpool | A rating |
| IL LUPO LTD | BASLOW BAKEWELL | A rating |
| Il Makiage GB Ltd | London | A rating |
| IL Molino Limited | London | A rating |
| IL PELLEGRINO WATFORD LTD t/a IL PELLEGRINO | HERTFORDSHIRE | A rating |
| IL PESCATORE TRADING LIMITED | Paisley, | A rating |
| IL SAPORE ITALIAN LTD | WIGAN | A rating |
| Il TRICOLORE Ramsgate ltd | Ramsgate | A rating |
| ILAPAK LIMITED | COWLEY | A rating |
| Ilchester Estates | Dorchester | A rating |
| Ilco Limited | Birmingham | A rating |
| ILCON LIMITED | London | A rating |
| ILE OBE Ltd | Portsmouth | A rating |
| ILEARN INTERNATIONAL LIMITED | Oldham | A rating |
| Ilene Ltd | Portavogie | A rating |
| ILEO TRADING CO. LTD | Worcester Park | A rating |
| iletpro Holdings Ltd | Bristol | A rating |
| Ilex Capital Services Limited | Kensington | A rating |
| ILFD Group Ltd | Southend-On-Sea | A rating |
| Ilford Cash & Carry Ltd | London | A rating |
| ILFORD COFFEE HOUSE LTD | Ilford | A rating |
| Ilford County High School | ILFORD | A rating |
| ILFORD DAIRY LIMITED | London | A rating |
| Ilford Dental Care Ltd T/A Ilford Dental Care | Ilford | A rating |
| Ilford Dental Centre | Ilford | A rating |
| Ilford Dry Cleaners Ltd | Ilford | A rating |
| ILFORD ELECTRICIANS LTD | Ilford | A rating |
| ILFORD GENTS BARBERS LTD | ilford | A rating |
| Ilford Homes Limited | Rochford | A rating |
| Ilford Islamic Centre Limited | Ilford | A rating |
| ILFORD KITCHENS LTD | Ilford | A rating |
| Ilford Lane Barber Ltd | London | A rating |
| Ilford Lane Under Fives Playgroup | Ilford | A rating |
| ILFORD P BAKERY LIMITED T/A CakeCo | Ilford | A rating |
| ILFORD TAKEAWAY SALES LIMITED | Ilford | A rating |
| Ilford Xchange Ltd | Ilford | A rating |
| Ilfordas Builders Ltd | Ilford | A rating |
| Iliad Solutions LTD | Leeds | A rating |
| ILIAH MOTORS LTD | London | A rating |
| Ilika Technologies Ltd | Romsey | A rating |
| ILIRIAN CONSTRUCTION LTD | Grays | A rating |
| Ilium Limited | Twickenham | A rating |
| ILJIN ELECTRIC UK | Surrey | A rating |
| ilk Agency | Leeds | A rating |
| Ilkley Care Associates Ltd | Ilkley | A rating |
| Ilkley Dental Care Ltd | Ilkley | A rating |
| Ilkley Lawn Tennis & Squash Club | Ilkley | A rating |
| ILLAM RESTAURANT LTD T/A ILLAM SOUTH INDIAN KITCHEN | Harrogate | A rating |
| Illford Cellular Ltd | Barking | A rating |
| Illiquidx Limited | London | A rating |
| Illston & Robson Ltd | Birmingham | A rating |
| Illumin8 Blinds & Curtains Limited | Nottingham | A rating |
| Illumina Cambridge Limited | Great Abington | A rating |
| Illuminance Fostering Services Ltd | Milton Keynes | A rating |
| Illuminas LLP | London | A rating |
| Illuminate Digital Limited | London | A rating |
| Illuminate Financial Management Ltd | London | A rating |
| ILLUMINATE MINDS TRUST | KENT | A rating |
| Illuminate Tech Ltd | London | A rating |
| Illumination Consulting Limited | Ilford | A rating |
| Illuminet Solutions Limited | Poole | A rating |
| Illumio UK Limited | Reading | A rating |
| ILLUSION DESIGN & PRINT LTD | Birmingham | A rating |
| Illusion Design and Construct | London | A rating |
| Illusionsign Limited | Smethwick | A rating |
| Illustrate Digital LTD | Cardiff | A rating |
| Illustrious Hair Studio | Middlesex | A rating |
| ILLUSZIONZ MEDIA LTD | DARTFORD | A rating |
| Illycaffe UK Limited | Northampton | A rating |
| ILM Capital Limited | London | A rating |
| Ilm-Ornate Lane Ltd | Bradford | A rating |
| Ilminster Cricket Club | Ilminster | A rating |
| Ilmor Engineering Ltd | Brixworth | A rating |
| iLoF - Intelligent Lab on Fiber Limited | London | A rating |
| ILOFT CONVERSIONS LTD | London | A rating |
| ILONG GLOBAL LTD | NEW MALDEN | A rating |
| ILP UK Holdings Ltd | London | A rating |
| ILPRA SYSTEMS UK LTD | Swindon | A rating |
| ILS GLOBAL LTD | Birmingham | A rating |