| QODEA LIMITED | Manchester | A rating |
| QODEA TECHNOLOGY LIMITED | Manchester | A rating |
| Qogita UK Ltd | London | A rating |
| Qomply Limited | London | A rating |
| Qontrol Ltd. | Bristol | A rating |
| Qoolize Ltd | London | A rating |
| Qore Legal Ltd | London | A rating |
| Qorvo UK Ltd | Theale | A rating |
| QOTU LTD | London | A rating |
| QP Hire Ltd | Downpatrick | A rating |
| QP ONLINE LIMITED | KENT | A rating |
| QPC Limited | Mold | A rating |
| Qpd London Ltd | London | A rating |
| QQ INCORPORATION LIMITED | Dagenham | A rating |
| QQS 786 LTD | Manchester | A rating |
| QR Corporations Ltd | Lancashire | A rating |
| QRC Quality Reliable Care Ltd | HAILSHAM | A rating |
| QRM LTD | Halifax | A rating |
| Qrowdsy Ltd. | London | A rating |
| QRS SERVICES LTD | BRADFORD | A rating |
| QS CHEF LIMITED T/A QUEENS SPICY CHEF | Blackburn | A rating |
| QS ENTERPRISES LTD | LONDON | A rating |
| QS Foodservice Ltd | Bradford | A rating |
| QS Quacquarelli Symonds Ltd | London | A rating |
| QSC Concrete LTD | Birmingham | A rating |
| QSC UK & Ireland Ltd | Egham | A rating |
| QSI Group Limited | Billingham | A rating |
| QSID Limited | Bedfordshire | A rating |
| QSM Fashion Ltd | London | A rating |
| QSM TECH LIMITED | London | A rating |
| QSR 1 Limited | London | A rating |
| QSR FUEL LTD T/a FRESHLY BAKED LTD | East Sussex | A rating |
| QSR Trading Limited | Meriden | A rating |
| QTS Group | Strathaven | A rating |
| Qu Junktions LLP | Bristol | A rating |
| Quabbala Limited | London | A rating |
| QUAD NETWORK SOLUTIONS LTD | Swansea | A rating |
| Quad UK Midco 2 Limited | Nottingham | A rating |
| QuadConsult Ltd | Cardiff | A rating |
| QuadCorps Ltd | Stratford-Upon-Avon | A rating |
| QUADER ESTATES LIMITED | Sheffield | A rating |
| QUADIENT UK LIMITED | London | A rating |
| Quadir Hairdressers | Cardiff | A rating |
| QUADRA QUICK LIMITED | Romford | A rating |
| Quadralene Limited | Derby | A rating |
| Quadram Institute Bioscience | Norwich | A rating |
| Quadrangle Research Group Limited | London | A rating |
| Quadrant Care Services LTD | Luton | A rating |
| Quadrant Development Management Limited | London | A rating |
| Quadrant GEO Ltd | London, England | A rating |
| QUADRANT HARMON CONSULTING LIMITED | LONDON | A rating |
| Quadrant Heating & Electrics Limited | High Wycombe | A rating |
| Quadrant Strategies Ltd | London | A rating |
| Quadranz Ltd | Luton | A rating |
| Quadrata Limited | Stevenage | A rating |
| Quadrature Capital Limited | London | A rating |
| Quadrature Climate Foundation | London | A rating |
| Quadreal UK Services Limited | London | A rating |
| Quadrise International Limited | London | A rating |
| Quadrivio International Limited | London | A rating |
| Quadrum Facades | Bishops Stortford | A rating |
| Quadrum Real Estate LLP | London | A rating |
| QUADWAVE CONSULTING UK LIMITED | London | A rating |
| Quaero Capital LLP | London | A rating |
| Quai Administration Services Ltd | Lynch Wood, Peterborough | A rating |
| Quaife.net Limited | Redruth | A rating |
| QUAINTSYSS LTD | GLASGOW | A rating |
| Quaisr Limited | Gerrards Cross | A rating |
| Quaker Service | Belfast | A rating |
| Quakers in Britain also known as the Religious Society of Friends | London | A rating |
| QUAKERS LTD | London | A rating |
| Qualasept Ltd t/a Bath ASU | Corsham | A rating |
| Qualco UK Limited | Weybridge | A rating |
| Qualcomm Technologies International Ltd | Cambridge | A rating |
| QUALIENT TECHNOLOGY SOLUTIONS UK LIMITED | READING | A rating |
| Qualifications Scotland | Dalkeith | A rating |
| Qualified Ltd | Birmingham | A rating |
| QUALIS FLOW LIMITED | LONDON | A rating |
| QUALITASCARE LIMITED | Morecambe, | A rating |
| QUALITCARE LTD/QUALITCARE24-7 LTD | PORTSMOUTH | A rating |
| QUALITECH INTEGRATED SERVICES LTD | Thrapton | A rating |
| Qualitest Software Testing Limited | London | A rating |
| Qualitetch Components Ltd | March | A rating |
| Qualities Services Ltd | London | A rating |
| Quality & Compassion Ltd | Aylesbury | A rating |
| Quality & Compassionate Care Ltd | Bristol | A rating |
| Quality + Care Solutions Ltd | Easington Colliery | A rating |
| QUALITY AND PRICE FURNITURE LTD | Nottingham | A rating |
| QUALITY ASSURED CARE SERVICES LTD | STUDLEY | A rating |
| Quality Assured Ltd | London | A rating |
| QUALITY AUTO SELECT LTD | RAINHAM | A rating |
| QUALITY BARGAINS INTL LTD. | LONDON | A rating |
| Quality Bites Ltd | Walsall | A rating |
| Quality Booze Ltd | Croydon | A rating |
| Quality Building Envelope Solutions Ltd | East Kilbride | A rating |
| QUALITY BUTCHERS AND INTERCONTINENTAL FOODS LTD | Harlow | A rating |
| Quality by Randomization Limited | Salford | A rating |
| Quality Care (Devon) Limited | Torquay | A rating |
| QUALITY CARE (SC) LIMITED | EDINBURGH | A rating |
| Quality Care (Surrey) Ltd | Luton | A rating |
| QUALITY CARE & RECRUITMENT SOLUTIONS LIMITED | Greenford | A rating |
| Quality Care and Companionship Ltd t/a Acer Care | Hanley Swan | A rating |
| Quality Care Dorset Ltd. | Christchurch | A rating |
| Quality Care Home (Midlands) Ltd | Birmingham | A rating |
| Quality Care Limited Company Limited | Woolwich | A rating |
| Quality Care Resourcing | Colchester | A rating |
| Quality Care Scotland Ltd | Glasgow | A rating |
| Quality care selby ltd | SELBY | A rating |
| QUALITY CARE SERVICES LIMITED | PETERBOROUGH | A rating |
| Quality care time ltd | Southgate | A rating |
| QUALITY CARPET & FLOORING LTD | Romford | A rating |
| Quality Carpet & Furniture Ltd | Luton | A rating |
| Quality Cars and Parts Limited | Dagenham | A rating |
| QUALITY CENTER LIMITED | Birmingham | A rating |
| Quality Chess UK Ltd | Glasgow | A rating |
| Quality Chicken & Ribs Limited t/as Quality Chicken & Ribs | Kent | A rating |
| QUALITY CHOICE LTD | Glenrothes | A rating |
| Quality Clouds Limited | London | A rating |
| QUALITY CONVENIENCE STORES LTD TA 10 O.CLOCK SHOP | Glasgow | A rating |
| Quality Counsel Law | London | A rating |
| Quality Crops (UK) Limited | Luton | A rating |
| Quality Dental : Shoreham-by-Sea ( Shoreham Oral Care Ltd ) | Shoreham-by-Sea | A rating |
| Quality Dental Care Limited | KETTERING | A rating |
| Quality dry cleaners | Surrey | A rating |
| QUALITY ENGINEERED PRODUCTS LIMITED | Gloucestershire | A rating |
| quality fast facades | liverpool | A rating |
| QUALITY FIRST AND FOREMOST CARE LIMITED | BRISTOL | A rating |
| QUALITY FLORENCE LIMITED | London | A rating |
| QUALITY FOOD AND SERVICE LIMITED | LONDON | A rating |
| Quality Food and Wine | Greenwich | A rating |
| Quality Food Center Ltd | London | A rating |
| Quality Food Products (Aberdeen) Ltd | Aberdeen | A rating |
| Quality Foods | Ilford | A rating |
| Quality Fried Chicken T/A QFC | LONDON | A rating |
| Quality Fruit & Veg Limited | Peterborough | A rating |
| QUALITY HALAL BUTCHER LTD | ROCHDALE | A rating |
| QUALITY HALAL MEAT & FISH LIMITED T/A Quailty Halal Meat | London | A rating |
| QUALITY HALAL MEAT & GROCERS LTD | Ilford | A rating |
| Quality Health &Homecare Services Ltd | Evesham | A rating |
| Quality Healthcare Agency Limited | East Sussex | A rating |
| Quality Healthcare Professionals LTD | Bournemouth | A rating |
| Quality Houseware Ltd | London | A rating |
| QUALITY HOUSING & SOCIAL CARE LIMITED | London | A rating |
| QUALITY INDIAN FOODS LTD T/A KOH-I-NOOR | Sheerness | A rating |
| QUALITY INSPECTION SERVICES INC JAP | WALTHAM ABBEY | A rating |
| Quality Life Matters Care Services Ltd | Milton Keynes | A rating |
| Quality Life UK (Care Services) Ltd | Derbyshire | A rating |
| QUALITY LIVING PLUS | Haverhill | A rating |
| Quality Marble Granite LTD | Wembley | A rating |
| QUALITY MATTERS LTD | Wallasey | A rating |
| Quality of Life Foundation | London | A rating |
| Quality of Life Homecare Ltd | London | A rating |
| Quality of Life Services Ltd. t/a Leading Care Lancashire | Preston | A rating |
| Quality Pack Limited | Harlow | A rating |
| QUALITY PART X LIMITED | Bedfordshire | A rating |
| QUALITY PART X SURBITON LIMITED | RIPLEY | A rating |
| Quality Pet Care | Rotherham | A rating |
| Quality Pet Care (t/a The Vet) | Woking | A rating |
| Quality Process limited | London | A rating |
| Quality Professional Services Ltd | Rugby | A rating |
| Quality Protects Children Ltd | Liverpool | A rating |
| Quality Quartz & Granite Ltd. | Slough | A rating |
| QUALITY RESPONSE SERVICES LTD | SHEFFIELD | A rating |
| Quality Traders Ltd | Romford | A rating |
| Quality Veg Suppliers Ltd | BRADFORD | A rating |
| QUALITY WAY LTD | Southall | A rating |
| Qualityone Consultancy Limited | Leeds | A rating |
| QUALITYSWEETS LIMITED | London | A rating |
| QualRisk Ltd | London | A rating |
| Qualter Hall & Co. Ltd | Barnsley | A rating |
| Qualtex | Manchester | A rating |
| QUALTICK WINDOWS & GLAZING LTD | Birmingham | A rating |
| Qualys Limited | Reading | A rating |
| Quant Golf Limited | City of London | A rating |
| Quant Group Ltd | London | A rating |
| Quant Insight Ltd | London | A rating |
| Quant Network Limited | London | A rating |
| Quanta Corp Ltd | London | A rating |
| Quanta Dialysis Technologies Ltd | Warwick | A rating |
| Quantaco | London | A rating |
| QUANTAMIC SOLUTIONS LIMITED | London | A rating |
| Quantatative Limited | Sutton | A rating |
| Quantbot Technologies Ltd | London | A rating |
| Quantbox Research UK Ltd | Cambridge | A rating |
| Quantcast Limited | London | A rating |
| QuantCo Holding Ltd | London | A rating |
| Quantcore Technologies Ltd | Glasgow | A rating |
| QUANTEA SITE 2 LTD | London | A rating |
| QUANTEAM UK LIMITED | London | A rating |
| Quantem Services Limited | London | A rating |
| Quantemol limited | LONDON | A rating |
| Quantex Arc Limited | London | A rating |
| Quantexa Ltd | London | A rating |
| Quantfury Trading UK Limited | London | A rating |
| Quanticate Interntional Limited | Hitchin | A rating |
| Quantico Analytics Limited | London | A rating |
| Quantics Consulting Ltd. | Edinburgh | A rating |
| Quantifi Limited | London | A rating |
| Quantinuum Limited | London | A rating |
| Quantiphi Limited | Reading | A rating |