| Q & Y International Ltd | High Wycombe | A rating |
| Q Accountants Ltd | London | A rating |
| Q BOARD LTD | Wednesbury | A rating |
| Q C Polymer Limited | Coseley | A rating |
| Q C POLYMER LIMITED | BILSTON | A rating |
| Q Care Assist | Nottingham | A rating |
| Q Care Limited | Abergavenny | A rating |
| Q Chi Limited | Swindon | A rating |
| Q CHOWDHURY LIMITED | LONDON | A rating |
| Q Collection (UK) Limited | Ashby-de-la-Zouch | A rating |
| Q Cube Limited | London | A rating |
| Q Cutz Ltd | MANCHESTER | A rating |
| Q INDIA (UK) LIMITED | London | A rating |
| Q Management Services Ltd | London | A rating |
| Q RETAIL STORES LTD | GOLDTHORPE | A rating |
| Q River Limited T/A Mum and You | Brentford | A rating |
| Q Squared Solutions Ltd | Livingston | A rating |
| Q STONE CO U.K LTD | BIRMINGHAM | A rating |
| Q Stores London Ltd T/As Q Stores | London | A rating |
| Q Sustain Ltd | Manchester | A rating |
| Q Tandoori (Leire) Ltd | Leicester | A rating |
| Q TECH MIDLANDS LTD | Hockley | A rating |
| Q Tech Private Ltd | Bromley | A rating |
| Q Verde | Richmond | A rating |
| Q-Bot LTD | London | A rating |
| Q-CTRL UK Limited | Oxford | A rating |
| Q-Energy Sustainable Investments Ltd | London | A rating |
| Q-Energy Sustainable Services Limited | London | A rating |
| Q-Flo Ltd. | Sevenoaks | A rating |
| Q-FREE (BRISTOL) UK LIMITED | Weston-Super-Mare | A rating |
| Q-Mass Ltd | Kelvin South Business Park | A rating |
| Q-Online Limited | Croydon | A rating |
| Q-Style Ltd. T/A Aura | Richmond upon Thames | A rating |
| Q.A.ELECTRICAL PRODUCTS LIMITED | Walsall | A rating |
| Q&B 92 Limited t/a Taste of Lahore | Paddington | A rating |
| Q&L LOGISTIC (UK) LTD | Milton Keynes | A rating |
| Q&L-OSTECH LIMITED | Oxford | A rating |
| Q&N FOODS LIMITED | Bristol | A rating |
| Q&Q REAL ESTATE LTD | London | A rating |
| Q&S INVESTMENTS LTD | ILFORD | A rating |
| Q+ | London | A rating |
| Q12 PJ Limited T/A Papa Johns | Nottingham | A rating |
| Q2 LOCS PARLOUR LIMITED | England | A rating |
| Q2 Pharma Ltd t/a Q2 Pharmacy | High Wycombe | A rating |
| Q2Q Communications Ltd | Richmond | A rating |
| Q4 LONDON LIMITED | LONDON | A rating |
| Q5 LTD | London | A rating |
| Q500 Services Limited | London | A rating |
| QA CERTIFIED ACCOUNTANTS & TAX ADVISORS LTD | Ilford | A rating |
| QA Electrical Products ltd | Walsall | A rating |
| QA Limited | London | A rating |
| QA Point Ltd | Brentford | A rating |
| QA TAKEAWAY LIMITED t/a Red Chillies | Alloa | A rating |
| QA TEST PROFESSIONALS LTD | Newport | A rating |
| QA TRADE LIMITED | London | A rating |
| QA-UK LIMITED | Middlesex | A rating |
| Qaba Limited T/a Pepes Piri Piri | Donchester | A rating |
| Qabalo Ltd | Middlesbrough | A rating |
| QAD (BRIGHTON) LTD T/A Chowringhee | Brighton | A rating |
| QAD EUROPE LTD | BIRMINGHAM | A rating |
| QADRIA FOODS LTD | Glasgow | A rating |
| QADRIA TRUST (UK) | Birmingham | A rating |
| QAF Limited | London | A rating |
| QAHE Limited | London | A rating |
| Qair Renewables UK Limited | Liverpool | A rating |
| Qair Scotland Limited | Edinburgh | A rating |
| QAIS TRADERS LIMITED t/a Station News | Port Glasgow | A rating |
| QAISAR CONSTRUCTION LTD | Surrey | A rating |
| Qalam Academy for Excellence Limited | Paisley | A rating |
| Qandil Barber Shop Ltd | Newcastle upon Tyne | A rating |
| Qantas Airways Limited (UK) | London | A rating |
| Qantas Cabin Crew (UK) Ltd | Hounslow | A rating |
| QAPlus Ltd | Cwmbran | A rating |
| Qargo Tech Limited | London | A rating |
| Qarik Group Limited | Belfast | A rating |
| Qasim Enterprise Ltd T/A Smart Cabs Norwich | Norwich | A rating |
| Qasim Jan Limited | Southampton | A rating |
| QASR AL MADINA USED CARS UK LTD | Windsor | A rating |
| QASTCO LIMITED | Manchester | A rating |
| Qatalog Ltd | London | A rating |
| Qatalyst Partners Limited | London | A rating |
| Qatar Airways Group Q.C.S.C. | London | A rating |
| Qatar National Bank (Q.P.S.C.), London Branch | London | A rating |
| QATARI DIAR EUROPE LLP | LONDON | A rating |
| Qatro UK Ltd | London | A rating |
| QAWORKFORCE LTD | LEEDS | A rating |
| QAZ MOTOR SPORTS LTD | Greenford | A rating |
| QAZI & QAZI LIMITED | Birmingham | A rating |
| QAZI AND SONS ACCOUNTANTS LIMITED | London | A rating |
| Qazi Auto repairs Ltd | Nottingham | A rating |
| QB financials Ltd | Bristol | A rating |
| QBARTER TECHNOLOGY AND SERVICES LIMITED | Reading | A rating |
| QBC Nightime Solutions Ltd | HUDDERSFIELD | A rating |
| QBE Management Services (UK) Limited | London | A rating |
| Qbera Capital LLP | London | A rating |
| QBIC Hunter Services Limited | Southall | A rating |
| Qbots Energy Ltd | Manchester | A rating |
| QBS Software Limited | Wembley | A rating |
| QBurst Technologies UK Limited | Salisbusry | A rating |
| Qbyte Computing Limited | Stevenage | A rating |
| QC NEWPORT LTD | LONDON | A rating |
| QC QUALITY CONSTRUCTION LTD | London | A rating |
| Qcert Auto Sales Ltd | Sheffield | A rating |
| QCIC ltd | London | A rating |
| QCL Associates LLP | MILTON KEYNES | A rating |
| QCL Human Resources Limited | London | A rating |
| QCM Healthcare Limited | Colchester | A rating |
| QCMD | Glasgow | A rating |
| Qcom Limited | London | A rating |
| QCVC Limited (Queens Crescent Vets) | Glasgow | A rating |
| QD Holdings Limited | Glasgow | A rating |
| QD HORSHAM LTD | Harrow | A rating |
| QDD Surgery Limited | Liverpool | A rating |
| QDH CARS LTD | Harlow | A rating |
| Qdot Technology Ltd | Kidlington | A rating |
| QDrive Performance Limited | London | A rating |
| QDSA LIMITED | Dundee | A rating |
| QE Development Holdco Ltd | London | A rating |
| QED EDUCATION GROUP LIMITED | Windsor | A rating |
| QED Education Group Ltd | Windsor | A rating |
| QED Energy Ltd | Liverpool | A rating |
| QED Foundation Limited | Bradford | A rating |
| QED Investors UK Limited | London | A rating |
| QED London Ltd | Stanmore | A rating |
| QED Structures Ltd | Hove | A rating |
| QEGS Blackburn Academy Trust | Blackburn | A rating |
| QEGSMAT | Ashbourne | A rating |
| QEMPSI LIMITED | London | A rating |
| QEPOS SOLUTION LIMITED | Stretford | A rating |
| Qepos Solution Ltd | Manchester | A rating |
| Qera Marketing Ltd | London | A rating |
| QESNOX LIMITED | Newmarket | A rating |
| QFEX International Ltd. | London | A rating |
| QFinds Ltd | London | A rating |
| QFSU LIMITED T/A SHANGHAI EXPRESS | Belfast | A rating |
| QG Construction UK Limited | London | A rating |
| QGate Software Limited | Winchester | A rating |
| QH (Rosewood) Ltd | Lowestoft | A rating |
| QH ACCOUNTANTS LIMITED | Leeds | A rating |
| QH ASSOCIATES LTD | Leeds | A rating |
| QH AT THE LAURELS LIMITED | LEEDS | A rating |
| QH Care Services Limited | Wallington | A rating |
| QH Cranford Ltd T/A The Queens Head | Hounslow | A rating |
| QH Greenhill Ltd | Newton Abbot | A rating |
| QH High Broom Ltd | Crowborough | A rating |
| QH Homes Ltd | Wallington | A rating |
| QH IP Ltd | Crawley | A rating |
| QH Kathleen Chambers Ltd | Burnham- on -sea | A rating |
| QH St Mary's Limited | Worthing | A rating |
| QHSP UK LTD | London | A rating |
| QIAGEN Limited | Manchester | A rating |
| Qian Limited | Slough | A rating |
| Qiaochu Catering Management Ltd | Newcastle Upon Tyne | A rating |
| QIB (UK) plc | London | A rating |
| QIC European Investment Services Limited | London | A rating |
| QIKK NETWORK SOLUTIONS LTD | Sutton-in-Ashfield | A rating |
| QikServe Ltd | Edinburgh | A rating |
| QIMA (UK) LIMITED | London | A rating |
| Qima Coffee Limited | London | A rating |
| QIN NOODLE LTD | Oxford | A rating |
| Qin's Health Wellness Ltd | London | A rating |
| QinetiQ Group Plc | Farnborough | A rating |
| Qing Liang Buddhist Association | London | A rating |
| QiO Technologies Ltd | Egham | A rating |
| Qioptiq Photonics Limited | Southampton | A rating |
| QJC SERVICES LTD | Slough | A rating |
| QJP Limited | Wimborne | A rating |
| QK BOUTIQUE LTD | Manchester | A rating |
| QK9 Services Limited | Blackburn | A rating |
| QLAR Pneumatic Conveying UK Ltd | Doncaster | A rating |
| Qlearsite Ltd | London | A rating |
| Qlegal Ltd | London | A rating |
| QLIK SOLUTIONS LIMITED | Wembley | A rating |
| QlikTech UK Ltd | Winnersh | A rating |
| QLIKZ LTD | BIRMINGHAM | A rating |
| QLOGIC INC LTD | Bristol | A rating |
| QLS United Ltd T/A Showcase KTV | Sheffield | A rating |
| QM CATERING LTD | Nelson | A rating |
| QM LONDON TRADING LTD | LONDON | A rating |
| QM Recycled Energy Ltd | Rochester | A rating |
| QMADS LTD | Epsom | A rating |
| Qmed Pharmaceuticals ltd | London | A rating |
| QMetric Group Limited | London | A rating |
| QMK Management Ltd | London | A rating |
| QMPF LLP | Edinburgh | A rating |
| QMPROPERTYSOLUTION LTD | Bradford | A rating |
| QMR Consultants Limited | High Wycombe | A rating |
| Qmulus Solutions Limited | Worcestershire | A rating |
| QNAP UK Limited | Swindon | A rating |
| Qnary Ltd | London | A rating |
| QNS LLP | London | A rating |
| QNT RETAIL LTD | ILFORD | A rating |
| Qoda Consulting Ltd | London | A rating |
| 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 |