| Insight Shipping (UK) Limited | London | A rating |
| Insight Specialist Behavioural Service Ltd | Ashford | A rating |
| Insight Technology Ltd | Lonon | A rating |
| Insight Venture Management UK Limited | London | A rating |
| INSIGHT222 LIMITED | London | A rating |
| INSIGHTBRIDGE ULTIMATE LTD | Wigan | A rating |
| Insightful Brands T/A Hip Pop | Altrincham | A rating |
| INSIGHTFUL STRATEGIES & SOLUTIONS LTD | Sheffield, | A rating |
| Insightful Technology Limited | London | A rating |
| Insights ESC Ltd | London | A rating |
| INSIGHTS IT SOLUTIONS LIMITED | Warrington | A rating |
| Insights Learning & Development Limited | Dundee | A rating |
| Insights T/A ISX4 Limited | Warrenpoint | A rating |
| Insightsoftware UK Ltd | London | A rating |
| INSIGNIA HEALTHCARE GROUP LTD | NORWICH | A rating |
| Insignia Medical Systems Limited | Basingstroke | A rating |
| INSIGNIA SHIPPING SERVICES LTD | Grays | A rating |
| InSite Technical Services Limited | Pembroke Dock | A rating |
| Inskip Gee Architects Ltd | London | A rating |
| Insmed Innovation UK Ltd | Cambridge | A rating |
| Insolvency Practitioners Association | London | A rating |
| Insourced Agency | Newbury | A rating |
| INSPACE CONSTRUCTION GROUP LTD | Northampton | A rating |
| Inspec Solutions | Sheffield | A rating |
| Inspection Limited | Barnet | A rating |
| Inspectorate International Ltd | Witham | A rating |
| Inspira Digital Ltd. | Barnstaple | A rating |
| Inspira Health | Liverpool | A rating |
| Inspiralba Ltd | Campbel Town | A rating |
| Inspiralis Ltd | Norwich | A rating |
| inspiratia | London | A rating |
| INSPIRATION CARE GROUP LIMITED | LUTON | A rating |
| INSPIRATION HEALTHCARE GROUP PLC | Croydon | A rating |
| INSPIRATION TECH LTD | London | A rating |
| Inspiration Trust | Norwich | A rating |
| INSPIRATIONAL DEVELOPMENT GROUP LIMITED | Ascot | A rating |
| Inspirations Leicestershire LTD | Leicester | A rating |
| Inspirations Residential Care Home Ltd | Wolvehampton | A rating |
| Inspire (Walsall) Limited | Walsall | A rating |
| Inspire Audio Visual Ltd | Wetherby | A rating |
| INSPIRE BOLTON LIMITED | Bolton | A rating |
| Inspire Building Supplies Ltd | Derby | A rating |
| Inspire Care Agencies Limited | Tonbridge | A rating |
| Inspire Childcare Ltd | London | A rating |
| Inspire Community Services | St Helens | A rating |
| INSPIRE CONNECT COLLEGE & RECRUITMENT LTD | Hounslow | A rating |
| Inspire Dental Care | Rickmansworth | A rating |
| Inspire Dental Croydon Ltd T/A Croydon Dental Care | Surrey | A rating |
| Inspire Dental Ilford Limited T/A Whitestar Dental Care | Essex | A rating |
| Inspire Dental Rochford Ltd T/A Oak Dental Rochford | Rochford | A rating |
| Inspire Dental Southall Ltd | Southall | A rating |
| Inspire Education Group | Peterborough | A rating |
| Inspire Education Trust | Coventry | A rating |
| INSPIRE INVESTMENTS GROUP LTD | Middlesbrough | A rating |
| Inspire London Church | London | A rating |
| Inspire London College Limited | London | A rating |
| INSPIRE MANAGEMENT GROUP LTD | Surbiton | A rating |
| Inspire Middlesex College Ltd | Hounslow | A rating |
| Inspire Movement | Chesterfield | A rating |
| Inspire Neurocare Limited | Slough | A rating |
| Inspire Neurocare Limited | Worcester | A rating |
| Inspire Partnership Academy Trust | Woolwich | A rating |
| Inspire Pharmacy | Newcastle-under-Lyme | A rating |
| Inspire Physio & Fitness | London | A rating |
| INSPIRE SUPPORT WORKERS LTD | LONDON | A rating |
| Inspire Supported Living Ltd | Bedford | A rating |
| Inspire Talent Ltd | London | A rating |
| Inspire Together Ltd | Clevedon | A rating |
| Inspire Wellbeing Ltd | Belfast | A rating |
| Inspire Wholesale Limited | Ilford | A rating |
| Inspire you care ltd | Birmingham | A rating |
| Inspired 2 Care Ltd | Liverpool | A rating |
| Inspired By D LTD | Harrow | A rating |
| Inspired by Events Ltd | Edinburgh | A rating |
| INSPIRED CARE 4ALL LTD | Leicester | A rating |
| Inspired Day Care Services Limited t/a Inspired Day Care | Doncaster | A rating |
| Inspired Design and Build Limited | Gerrards Cross | A rating |
| Inspired Dwellings Ltd | London | A rating |
| Inspired Educational Consulting Limited | Cambridge | A rating |
| Inspired Elements Limited | Stanmore | A rating |
| Inspired Finco Holdings Limited | London | A rating |
| Inspired Gaming (UK) Limited | Burton on Trent | A rating |
| Inspired Health Chiropractic Ltd | Writtle | A rating |
| Inspired Homes Network Ltd | Conwy | A rating |
| INSPIRED HOUSING LTD | Birmingham | A rating |
| Inspired Indian Limited T/A Sakonis Restaurant | Pinner, Hatch End | A rating |
| Inspired Learning Group (UK) Limited | Stanmore | A rating |
| Inspired Life Care Ltd | Crewe | A rating |
| Inspired Lighting Ltd | Heywood | A rating |
| Inspired Limited | Kirkham | A rating |
| Inspired Pet Nutrition Ltd | Topcliffe | A rating |
| Inspired PLC | Preston | A rating |
| Inspired Project Developments Limited | Manchester | A rating |
| INSPIRED SECURITY SOLUTIONS (MANCHESTER) LTD | Crewe | A rating |
| Inspired Testing Limited | London | A rating |
| Inspired Thinking Group (ITG) Limited | Birmingham | A rating |
| INSPIREDGT LTD | Twickenham | A rating |
| Inspiren Global Education Ltd | London | A rating |
| InspireXT Consulting Ltd | London | A rating |
| Inspiring Aspirations Plus Ltd T/A Inspiring Support | Ipswich | A rating |
| INSPIRING GENERATIONS LTD | Wakefield | A rating |
| INSPIRING ON - HEALTHCARE LTD | Plymouth | A rating |
| Inspiring Restaurants Ltd | Gloucester | A rating |
| Inspiring Tutors Ltd | London | A rating |
| Inspiring Vet Care Ltd | Keynsham | A rating |
| Inspiringmindsnet UK Ltd | London | A rating |
| INSPIZER LTD | London | A rating |
| INSTA MEDI CARE SOLUTIONS LIMITED | Luton | A rating |
| Insta Rice Ltd | London | A rating |
| Instabase UK Ltd | London | A rating |
| Instabook Ltd | London | A rating |
| INSTADEEP LTD | London | A rating |
| INSTAGRID UK LTD | CRAWLEY | A rating |
| Installation Maintenance And Controls Ltd | Coventry | A rating |
| INSTALLER SOLUTIONS LTD | BURY | A rating |
| Installforce Ltd | Stoke-on-Trent | A rating |
| INSTALLIO LTD | London | A rating |
| INSTANCE SAVE LTD | Greater London | A rating |
| Instant Access Technologies | Wokingham | A rating |
| Instant Accounting Solutions Ltd | Birmingham | A rating |
| INSTANT BUILDERS LTD | London | A rating |
| Instant Care Ltd. | Oldham | A rating |
| INSTANT CARE SOLUTIONS LIMITED | HOUNSLOW | A rating |
| Instant Energy Ltd | London | A rating |
| Instant Impact Ltd | London | A rating |
| INSTANT KARMA RETAIL LTD | London | A rating |
| INSTANT KARMA STORE LIMITED | London | A rating |
| Instant Offices Limited | London | A rating |
| INSTANT PEST CONTROL LTD | Greenford | A rating |
| Instant Physio Ltd. | London | A rating |
| Instant Security Limited | Luton | A rating |
| INSTANT SOLUTION LTD | Hounslow | A rating |
| Instant Win Gaming Ltd | London | A rating |
| InstantonIT Limited | London | A rating |
| INSTATECH GLOBAL LTD | Brentford | A rating |
| Instem Ltd | Stone | A rating |
| Instil Bio (UK) Limited | Manchester | A rating |
| Instill AI Ltd | London | A rating |
| Instinct Studios Limited | London | A rating |
| Instinet Global Services Limited | London | A rating |
| Institut francais du Royaume-Uni | London | A rating |
| Institute for Employment Studies | HOVE | A rating |
| Institute for Fiscal Studies | London | A rating |
| Institute for Government | London | A rating |
| Institute for Strategic Dialogue | London | A rating |
| Institute for Sustainable Philanthropy | Plymouth | A rating |
| Institute for the Future of Work | London | A rating |
| Institute for Voluntary Action Research | London | A rating |
| Institute of Advanced Motorists | Welwyn Garden City | A rating |
| Institute of Art and Law Limited | Builth Wells | A rating |
| Institute of Art London Limited | London | A rating |
| INSTITUTE OF CHARITY(The Rosminians) | MANSFIELD | A rating |
| Institute of Chartered Shipbrokers | London | A rating |
| Institute of Christ the King Sovereign Priest | New Brighton | A rating |
| Institute of Contemporary Arts | London | A rating |
| Institute of Development Studies | Brighton | A rating |
| Institute of Directors | London | A rating |
| Institute of Economic Affairs Limited | London | A rating |
| INSTITUTE OF INTEGRATED SYSTEMIC THERAPY | LONDON | A rating |
| Institute of Occupational Medicine | Penicuik | A rating |
| Institute of Risk Management | London | A rating |
| INSTITUTE OF ST.MARCELLINA | London | A rating |
| Institution of Civil Engineers | London | A rating |
| Institution of Occupational Safety and Health | Leicester | A rating |
| Institutional Investors Group on Climate Change Limited | London | A rating |
| Institutional Limited Partners Association (UK) Limited | London | A rating |
| Institutional Shareholder Services UK Limited | London | A rating |
| Institutional Venture Partners UK LLP | Fitzorvia London | A rating |
| Instituto Cervantes | London | A rating |
| Instonians | Belfast | A rating |
| INSTRADING LTD | Bedworth | A rating |
| Instro Precision Ltd | Sandwich | A rating |
| Instron - Division of ITW Ltd | High Wycombe | A rating |
| INSTRUCKO LIMITED | London | A rating |
| Instructional Design and Training Limited | Horsham | A rating |
| Instructure Global Limited | London | A rating |
| Instrument & Control Services Limited | Stoke On Trent | A rating |
| Instrument Transformers Limited | East Kilbride | A rating |
| Instyle Hair&Beauty LTD | Wakefield | A rating |
| Insulation Global Solutions Ltd | London | A rating |
| Insulcon Technical Limited | North Shields | A rating |
| Insulet International Limited | London | A rating |
| Insultec Limited | West Drayton | A rating |
| Insurance Collections Bureau Ltd | Welwyn Garden City | A rating |
| Insurance Data Solutions | Chelmsford | A rating |
| Insurance Development Forum Limited | London | A rating |
| Insure and Go Insurance Services Limited | Bristol | A rating |
| Insure Smart Limited | Kirkcaldy, | A rating |
| InsureMO (UK) Limited | London | A rating |
| Insurity Europe Ltd | London | A rating |
| Insurtech Insights Limited | London | A rating |
| Insurwave Limited | London | A rating |
| InsurX Limited | London | A rating |
| INSYDIUM LTD | Holmfirth | A rating |
| Insync Bikes LIimited | Manchester | A rating |
| InSync Technology Ltd | Petersfield | A rating |
| INT ADMISSION SERVICE LTD | Ilford | A rating |
| INT Direct Limited | Enfield | A rating |
| INT Enterprise Limited | Slough | A rating |
| Intacare Ltd | CHESTERFIELD | A rating |