| Ikon Arts Management | London | A rating |
| Imaginate | Edinburgh | A rating |
| Imagination PR | London | A rating |
| IMAGINE X GLOBAL LTD | Stretford | A rating |
| IMG ARENA UK LTD | London | A rating |
| IMG Artists (UK) Ltd | London | A rating |
| IMG Media Limited | London | A rating |
| Imperial War Museum Trading Company Limited | London | A rating |
| In Between Time | Bristol | A rating |
| Incandescence Production Company Ltd | Penzance | A rating |
| Incredible Artists Ltd | Leyburn | A rating |
| Independent Dance | London | A rating |
| IndiaCast UK Ltd | Harrow | A rating |
| Individual Artist Management Ltd | Beds | A rating |
| Indo-UK Film Company | Hounslow | A rating |
| INDUSTRIAL LIGHT & MAGIC UK LIMITED | LONDON | A rating |
| Industry People UK Ltd | Manchester | A rating |
| Infinite Content Ltd | Edinburgh | A rating |
| Inner City Music Ltd | Manchester | A rating |
| Institut francais du Royaume-Uni | London | A rating |
| Institute of Contemporary Arts | London | A rating |
| Intermusica Artists Management Limited | London | A rating |
| International Artist Agency Ltd | Leyland | A rating |
| International Convention Centre Wales Limited | Newport | A rating |
| International Documentary Festival Sheffield | Sheffield | A rating |
| International Hospitals Group | Gerrards Cross | A rating |
| International Management Group (UK) Limited - Fashion Representation | London | A rating |
| International Model Management Ltd | London | A rating |
| International Society for Krishna Consciousness (ISKCON) | Aldenham, Watford | A rating |
| International Society for Krishna Consciousness London | London | A rating |
| INTERNATIONAL TELEVISION CHANNEL EUROPE LIMITED T/A NTV | LONDON | A rating |
| Involved Productions Ltd | London | A rating |
| Iris Nation Worldwide Limited | London | A rating |
| Iris Prize Outreach Limited | CARDIFF | A rating |
| ITB AGENCY LTD | LONDON | A rating |
| Ithaca House Limited | London | A rating |
| ITM Live Ltd | LONDON | A rating |
| ITV plc | London | A rating |
| IV8 LTD | Waddesdon | A rating |
| J'adore Models | Manchester | A rating |
| Jade Eva Collins t/as evacollinsalonso | Stevenage | A rating |
| Jaipur Express Fish & Chips Co Limited | Leicester | A rating |
| JAJEX APPAREL LIMITED | London | A rating |
| James Brown Management | Cambridge | A rating |
| James Curtis Consulting Ltd | London | A rating |
| James Steel Productions LTD | London | A rating |
| James Wilkie t/a The Maasai Company | DOLLAR | A rating |
| Jamie Wilson Productions Ltd | Sutton | A rating |
| January Group Ltd | London | A rating |
| Jasmin Vardimon Company | Ashford | A rating |
| JASS CATERINGH | WOLVERHAMPTON | A rating |
| Jax Media Limited | London | A rating |
| JAY MILLERS CIRCUS | WOKING | A rating |
| Jays UK Ltd | Gt Yarmouth | A rating |
| JAZBA ENTERTAINMENT LTD. | BIRMINGHAM | A rating |
| Jazz North | Brighouse | A rating |
| Jazz UK Production LTD | London | A rating |
| Jehovah Evangelical Team (J.E.T.) C.C.C. Valley of Berachah parish | dartford | A rating |
| Jet Set Events By Jenny Limited | Craigavon | A rating |
| JEWISH MUSIC INSTITUTE | LONDON | A rating |
| JMS Recordz Worldwide Productions House Ltd | BURNHAM | A rating |
| JNR SKANKS LTD | Birmingham | A rating |
| JOHN LAWSONS CIRCUS LIMITED | BIDDENDEN ROAD | A rating |
| JOHN LOBB LTD. | London | A rating |
| John Robson | East Grinstead | A rating |
| JORDANLUCA LTD | London | A rating |
| Junction CDC Ltd | Cambridge, Cambridgeshire | A rating |
| Jungle Creations Ltd | London | A rating |
| Justice in Motion | OXFORD | A rating |
| JWTC ltd | York | A rating |
| K2 Agency Ltd | London | A rating |
| Kajans Womens Enterprise Ltd | Birmingham | A rating |
| Kalakuta Sunrise Ltd | London | A rating |
| Kambe Events Ltd | Bristol | A rating |
| Kate Moross Limited | London | A rating |
| Kate Moss Agency | London | A rating |
| KD Pathways | Birmingham | A rating |
| kennedy street enterprises ltd. | cheshire | A rating |
| Kenny Wax Ltd | London | A rating |
| KEVENTSP LTD | London | A rating |
| Keyframe Studios Ltd | London | A rating |
| Keywords Studios Limited | London | A rating |
| Kilimanjaro Live Limited | London | A rating |
| Kiln Theatre Ltd | London | A rating |
| King's College | Cambridge | A rating |
| Kings Place Music Foundation | London | A rating |
| Kingston Theatre Trust | Kingston upon Thames | A rating |
| Kingsway International Christian Centre | Chatham | A rating |
| KINSHOW MANAGEMENT & PROMOTIONS LIMITED | Manchester | A rating |
| Kirklees Metropolitan Council | Huddersfield | A rating |
| KL Communications Ltd | Surbiton | A rating |
| Knockengorroch Community Interest Company | Castle Douglas | A rating |
| Knucklehead Limited | London | A rating |
| KOCHHOUSE SIGNATURES LIMITED | PETERBOROUGH | A rating |
| Kode Media Ltd | London | A rating |
| KOME Entertainment | Warwick | A rating |
| Kontour Production Services Ltd | Pontefract | A rating |
| Konzertdirektion Hans Ulrich Schmid UK Ltd | London | A rating |
| KP GROUP LONDON LTD | Slough | B rating |
| Kramarenko Russian Circus | Manorbier | A rating |
| Krown Consults ltd | Barking | A rating |
| KTEG Ltd | Reading | A rating |
| Kult London Limited | London | A rating |
| Kultur Vibes Limited | Manchester | A rating |
| kurd production limited | Leeds | A rating |
| kushi media ltd | London | A rating |
| Kwokyau Ltd | London | A rating |
| LA Productions Ltd | Liverpool | A rating |
| Label Tattoo Limited | London | A rating |
| LAIKA UK Films Limited | London | A rating |
| Languages54 Ltd. | Maidstone | A rating |
| LANSDEL LIMITED.T/A-Maria Productions | London | A rating |
| Lateral MGMT UK Ltd | London | A rating |
| Lateralize Ltd | Stonehouse | A rating |
| LATIMER WARD CONSERVATIVE INSTITUTE LTD | LEICESTER | A rating |
| Laura Holmes Production Ltd. | London | A rating |
| LCUK Artists Ltd | London | A rating |
| Leeds Beckett University | LEEDS | A rating |
| Leeds Theatre Trust Limited | Leeds | A rating |
| Legacy Centre of Excellence | Birmingham | A rating |
| Legend Presents Ltd | Cowfold | A rating |
| Leicester Dance Theatre Ltd | Leicester | A rating |
| Leicester Theatre Trust Ltd | Leicester | A rating |
| Leighton-Pope Organisation | London | A rating |
| Leisure Employment Services | Hemel Hempstead | A rating |
| Leni's Model Management | London | A rating |
| let's circus | Newcastle upon tyne | A rating |
| Lewis Silkin LLP | London | A rating |
| Lief London LTD | London | A rating |
| Light N Light UK Limited | Uxbridge | A rating |
| LightField London Limited | London | A rating |
| LIME & LEMON ENTERTAINMENT LIMITED | Dartford | A rating |
| Linden Staub Ltd | London | A rating |
| Lio London Ltd | London | A rating |
| Lisa Peacock (Concert Management) Limited | London | A rating |
| Live Nation (Music) UK Ltd | London | A rating |
| Live Nation Limited | London | A rating |
| Live Promotions Events Ltd | Spalding | A rating |
| Liverpool Biennial of Contemporary Arts Ltd | Liverpool | A rating |
| Liz Linkleters Events | London | A rating |
| LJP MANAGEMENT LTD | WORTHING | A rating |
| LJW 2 PRIVATE LTD | Liverpool | A rating |
| LNZRT Ltd | London | A rating |
| Locate Productions Ltd | London | A rating |
| LOCHEE LOUNGE LTD | Dunfermline | A rating |
| Lock Artists | London | A rating |
| Locksmith Animation Limited | London | A rating |
| London Academy of Music and Dramatic Art | London | A rating |
| London Borough of Harrow | Harrow | A rating |
| London Borough of Lewisham | Catford | A rating |
| London City Ballet Limited | London | A rating |
| London Contemporary Dance (The Place) Limited | London | A rating |
| london glitch ltd | london | A rating |
| London International Festival of Theatre | London | A rating |
| London International Mime Festival Limited | London | A rating |
| London Mayfair Management Limited t/a Inca | London | A rating |
| LONDON MEDIA HOUSE LTD | London | A rating |
| London Metropolitan University | London | A rating |
| London Philharmonic Orchestra | London | A rating |
| London Social Group Ltd | London | A rating |
| London Symphony Orchestra | London | A rating |
| London Theatre Company Productions Limited | London | A rating |
| Longborough Festival Opera | Moreton-in-Marsh | A rating |
| Longleat Enterprises Ltd | Warminster | A rating |
| Lost Horizon Ltd | BRISTOL | A rating |
| LOTUS PRODUCTION & ENTERTAINMENT LTD | LEICESTER | A rating |
| Loughborough University | Loughborough | A rating |
| Love Hate Social Club Limited | London | A rating |
| Love Song Films Ltd | London | A rating |
| Lucy Watson Productions | Lambourn | A rating |
| Lufthansa German Airlines & Lufthansa Cargo | Hounslow | A rating |
| LULI UK FESTIVAL | OLDHAM | A rating |
| Luna Jack Ltd | Harrow | A rating |
| Lusion Ltd | Bristol | A rating |
| Lux Artists Limited | London | A rating |
| Luxury Wedding Photography | Nottingham | A rating |
| Lyric Theatre Hammersmith Limited | London | A rating |
| M and P Models | London | A rating |
| MAAPS Design & Architecture Limited | London | A rating |
| Macrobert Arts Centre Limited | Stirling | A rating |
| Mad Cow Films | London | A rating |
| Maestro Arts Ltd | London | A rating |
| Magic Sound Ltd | London | A rating |
| MAHER COMMUNITY ASSOCIATION (LEICESTER) UK | LEICESTER | A rating |
| Making Pictures Limited | London | A rating |
| Making Pictures Productions Ltd | London | A rating |
| MamboCity | WEMBLEY | A rating |
| Mammoth Screen Limited | London | A rating |
| Manchester Christian Community | Warrington | A rating |
| Manchester International Festival | Manchester | A rating |
| MANY ROOMS STUDIOS LTD | Battersea | A rating |
| Maple Tree Entertainment Ltd | Malvern | A rating |
| Marathon Music Limited | London | A rating |
| Marcia Edwards t/a ME Dance Company | Stourbrudge | A rating |
| Mark Goucher Productions Limited | London | A rating |
| Mark Rubinstein Ltd | London | A rating |
| Marshall Arts Limited | London | A rating |
| MARVGALLUP TRAVELS AND TOURS CONSULTANCY LTD | London | A rating |
| MARY ROSE HOTEL LIMITED | Orpington, Kent | A rating |
| Masha Popova Ltd | London | A rating |