| itarle (UK) Limited | London | A rating |
| Itasca Wines PLC | Crondall | A rating |
| ITASILL LTD | GUILDFORD | A rating |
| ITASTY LIMITED | LLANELLI | A rating |
| Itau BBA International plc | London | A rating |
| ITB AGENCY LTD | LONDON | A rating |
| ITC Global (UK) Limited | Aberdeen | A rating |
| ITC Global Security Limited | London | A rating |
| ITC Hydraulic Services Ltd | Oldmeldrum | A rating |
| ITC Infotech Limited | London | A rating |
| ITCH Media | London | A rating |
| Itchen Group Holdings Limited | Mildenhall | A rating |
| ITE UK HOLDING LIMITED | London | A rating |
| ITEBS WORLD LTD | London | A rating |
| ITEC SOLUTIONS (NORTH WEST) LTD | Bury | A rating |
| ITEC Systems LTD | Pembury | A rating |
| ITECH FIX UK LTD | Scotland | A rating |
| ITECH REPAIR AND EXCHANGE LTD | WALSALL | A rating |
| iTech Services Ltd | London | A rating |
| ITECHNICIANS LIMITED | London | A rating |
| Itechnick Ltd | Essex | A rating |
| Itechsquad | Lytham st annes | A rating |
| ITECKPRO LIMITED | London | A rating |
| ITEG UK Ltd | London | A rating |
| ITEHAD FABRICS LIMITED | BIRMINGHAM | A rating |
| iTek Solutions Ltd | Inverness | A rating |
| ITEL Solutions Limited | Reading | A rating |
| Itential Europe Ltd | Holborn | A rating |
| ITERA AUTOMOTIVE SOLUTIONS UK LTD | London | A rating |
| Iterable Limited | London | A rating |
| Iternity Limited | London | A rating |
| Itero Development Limited | Iver | A rating |
| Iteru Ltd | London | A rating |
| ITEXACT Limited | East Horsley | A rating |
| ITF Licensing (UK) Limited | Roehampton | A rating |
| ITH Pharma Ltd | London | A rating |
| Ithaca College | London | A rating |
| Ithaca Energy (UK) Limited | Aberdeen | A rating |
| Ithaca Energy Plc | London | A rating |
| Ithaca House Limited | London | A rating |
| Ithacus Ltd | London | A rating |
| iThink 365 Ltd | Leeds | A rating |
| ITHR Group PLC | London | A rating |
| ITI Capital Limited | London | A rating |
| ITI Engineering Group Limited | Eckington | A rating |
| ITI Yorkshire Limited | Bradford | A rating |
| ITIHAAS RESTAURANT | DALKEITH | A rating |
| ITIL LIMITED (TRADING AS INCITE INSIGHT) | WALLINGFORD | A rating |
| ITility Engineering And Support Services Limited | Brandon | A rating |
| Itim Limited | London | A rating |
| Itineris Software UK Ltd | Kingston upon Thames | A rating |
| ITINFOTECH LIMITED | Rochford | A rating |
| ITinStock Ltd | Waltham Cross | A rating |
| ITKaa Limited | London | A rating |
| ITLANDY LIMITED | London | A rating |
| ITM Europe Ltd | Welwyn Garden City | A rating |
| ITM Live Ltd | LONDON | A rating |
| ITM Power Plc | Sheffield | A rating |
| ITO EN EUROPE GMBH UK BRANCH | London | A rating |
| ITO33 UK | London | A rating |
| ITOA Limited | Twyford | A rating |
| ITOCHU Europe PLC | London | A rating |
| ITOLOGY CREATIONS LTD | Edinburgh | A rating |
| ITOPF Ltd | London | A rating |
| ITP Aero UK Limited | Hucknall | A rating |
| ITP Engines UK Limited | Leicester | A rating |
| ITPOOL UK LIMITED | Southall | A rating |
| ITQ IMAGE THROUGH QUALITY LIMITED | Hertfordshire | A rating |
| ITQUEST LIMITED | Ilford | A rating |
| ITR Foods Limited t/a International | Bradford | A rating |
| ITRAC SOLUTIONS LTD | London | A rating |
| Itransition Group Limited | London | A rating |
| Itron Metering Solutions UK Ltd | Felixstowe | A rating |
| ITRS Group Ltd | London | A rating |
| iTrust Care Services Ltd | Luton | A rating |
| iTrust Group Ltd | Luton | A rating |
| ITRUST PROPERTIES LTD | Sheffield | A rating |
| ITS 4 POINT OF SALE LTD | London | A rating |
| ITS A NEW DAY CIC | London | A rating |
| ITS ALL IN THE IMAGE LTD | Rochdale | A rating |
| ITS Contracts Limited | Bristol | A rating |
| ITS CONVENIENT LIMITED | Hounslow | A rating |
| ITS Cycling Limited | Partridge Green | A rating |
| ITS Digital Ltd | Hertford | A rating |
| ITS IVI LTD T/A Itsu | Wembley | A rating |
| Its Pizza Time Ltd | Wokingham | A rating |
| ITS SOUK LIMITED | Halstead | A rating |
| ITSEC LTD | Leicester | A rating |
| Itservice24/7 LIMITED | London | A rating |
| ItSo Creative Ltd | Ongar | A rating |
| ITSOL Limited | Watford | A rating |
| ITSQUARE LIMITED | Manchester | A rating |
| Itsu Limited | London | A rating |
| ITSX LTD | Witney, | A rating |
| ITT Industries Limited | Basingstoke | A rating |
| ITTAP Limited | Peterborough | A rating |
| Ittehad Metals UK Ltd | London | A rating |
| ITV plc | London | A rating |
| ITvantage Systems Limited | Essex | A rating |
| ITVET Ltd | Bishop's Stortford | A rating |
| ITVIB LIMITED | Reading | A rating |
| ITW Construction Products - Division of ITW Limited | Glenrothes | A rating |
| ITW Envopak, division at ITW Limited | Sidcup | A rating |
| ITW Limited (t/a Teknek) | Inchinnan | A rating |
| ITX UK Limited | London | A rating |
| Itza Media Ltd. | London | A rating |
| IU DIRECT LTD | Motherwell | A rating |
| IUCN World Conservation Union | Cambridge | A rating |
| iungo Solutions Limited | Cardiff | A rating |
| IUP2 LLP | Brighton | A rating |
| IV8 LTD | Waddesdon | A rating |
| Ivalua Ltd | London | A rating |
| iValuechain LTD | London | A rating |
| IVAN MEGAW & SON LTD | CRAIGAVON | A rating |
| Ivanhoe Cambridge Holdings UK Ltd t/a La Caisse | London | A rating |
| Ivanhoe Hotel | Belfast | A rating |
| Ivanhoe Mines UK Limited | London | A rating |
| Ivanmed Ltd | Edinburgh | A rating |
| Ivanti UK Limited | Bracknell | A rating |
| IVapes London Limited | Ilford | A rating |
| Ivaro Limited | Rickmansworth | A rating |
| IVATT SELF STORAGE AND PROPERTY SERVICES LIMITED | Peterborough | A rating |
| IVCP UK Limited | London | A rating |
| IVECO LIMITED | Basildon | A rating |
| Ivegate Limited | Leeds | A rating |
| Ivegate Phones Limited | Bradford | A rating |
| IVELHURST NURSING HOME LIMITED T/A IVELHURST NURSING HOME | Yeovil | A rating |
| iVendi Ltd | Colwyn Bay | A rating |
| Iventis Ltd | Lincoln | A rating |
| IVER VAN SALES LTD | Iver | A rating |
| Ives & Co Solicitors Limited | Nottingham | A rating |
| IVF Laboratory Solutions | Bromley | A rating |
| IVF London Ltd | Borehamwood | A rating |
| IVF Micro Limited | Leeds | A rating |
| IVI Eat Limited T/A German Doner Kebab | High Wycombe | A rating |
| IVI London Wimpole Ltd | London | A rating |
| IVI Motorway Services Limited T/A German Doner Kebab | Boxworth | A rating |
| IVI Waterfronts Limited T/A Waterfront Cafe Bar and Bistro | Wallingford | A rating |
| Ivnaas Limited | Berkshire | A rating |
| Ivo AI UK, Ltd | Cheltenham | UK Expansion Worker: Provisional |
| Ivo Carew Architects Ltd | London | A rating |
| Ivo Textiles Ltd | Middlesex | A rating |
| Ivoclar-Vivadent Limited | Leicester | A rating |
| Ivolve Care Holdings Limited | Chesterfield | A rating |
| Ivonbrook Properties | Matlock | A rating |
| Ivor King (C.E.C.) Limited | Nuneaton | A rating |
| Ivors Academy Trust | LONDON | A rating |
| Ivory & Ledoux Limited | London | A rating |
| Ivory Group Real Estate LTD | London | A rating |
| Ivory Interiors Limited | London | A rating |
| Ivory Rose Care | Brentwood | A rating |
| Ivory Seasons limited | London | A rating |
| IVORYBOND LIMITED | Wembley | A rating |
| Ivry Street Medical Practice | Ipswich | A rating |
| IVXS UK Limited | London | A rating |
| Ivy Business Centre Ltd | Manchester | A rating |
| Ivy Church Bristol | Bristol | A rating |
| IVY Content Limited T/A Avise Content Agency | Slough | A rating |
| Ivy Court Surgery | Tenterden | A rating |
| Ivy Farm Technologies | Oxford | A rating |
| Ivy Homecare Limited | Portsmouth | A rating |
| Ivy House Dental Practice | Camden | A rating |
| Ivy League Scholars Limited | Sidcup | A rating |
| Ivy Learning Trust | London | A rating |
| Ivy Legal Limited | Bromley | A rating |
| Ivy Lodge Care ltd | YORK | A rating |
| Ivy Lodge Retirement Home | York | A rating |
| Ivy Marketing and Consulting Ltd T/A East India Cafe | Gloucestershire | A rating |
| Ivy Mill Day Nursery | Liphook | A rating |
| IVY NEIL LTD | Gravesend | A rating |
| IVY TECH LTD | Derby | A rating |
| Ivy Union Limited, T/A Seafield House | Hove | A rating |
| IVY-LYNN SUPPORT AND CARE LTD | Liverpool | A rating |
| IVYBANK HEALTH CARE LIMITED T/A IVY BANK RESIDENTIAL CARE HOME | DOVER | A rating |
| Ivybank Care Limited | Leicester | A rating |
| Ivybridge Cricket Club | Ivybridge | A rating |
| Ivybridge Home Care Limited | Ivybridge | A rating |
| Ivydene Dental Practice | Salisbury | A rating |
| IW Group Services (UK) Limited | London | A rating |
| IW Lighting Design Limited T/A Illumination Works | London | A rating |
| IWAAN PROPERTY MANAGEMENT LIMITED | London | A rating |
| Iwade Stores Ltd T/As Nisa Local | Sittingbourne | A rating |
| IWBI (UK) Limited | London | A rating |
| IWCF Operations Ltd | Montrose | A rating |
| iwholesales Ltd | High Wycombe, Buckinghamshire | A rating |
| IWIL DREAM LTD | Manchester | A rating |
| iWisdom Business Partners Ltd | London | A rating |
| IWK Watford Ltd T/A Heavenly Desserts | Watford | A rating |
| iwoca Limited | London | A rating |
| IWSR Drinks Market Analysis Limited | London | A rating |
| IWTM UK Limited | Wallington | A rating |
| IXCEED SOLUTIONS LTD | LONDON | A rating |
| IXICO Technologies Ltd. | London | A rating |
| Ixora Hotel & Spa | Dolgarrog | A rating |
| Ixtract Limited | Leigh | A rating |
| Ixxus Limited | London | A rating |
| IXYS UK Westcode | Chippenham | A rating |
| iya studio ltd | london | A rating |
| Iyal Pvt Limited | Manchester | A rating |
| Iyan Linens Ltd | Rochdale | A rating |