| DT SOURCE LIMITED | London | A rating |
| DT&G LTD | WIRRAL | A rating |
| DTCC Europe Limited | London | A rating |
| DTD Courier & Cargo Limited | Leicester | A rating |
| DTD Developments Ltd | Leicester | A rating |
| DTDC Courier & Cargo (UK) Limited | Slough | A rating |
| DTE HOLDINGS (NORTH WEST) LTD | RUNCORN | A rating |
| Dtechtive Limited | London | A rating |
| DTEK International Ltd | London | A rating |
| DTEK INVESTMENTS LIMITED | London | A rating |
| DTH Plant Hire Ltd | Leicester | A rating |
| DTI EMEA Ltd | Milton Keynes | A rating |
| DTK Consultancy Ltd | London | A rating |
| DTM Diesel and petrol Injection Specialists ltd | bristol | A rating |
| DTN Europe UK Limited | London | A rating |
| DTS FINANCIAL SOLUTIONS LTD | Luton | A rating |
| DTS LONDON LIMITED | London | A rating |
| DTS Trading Inc Ltd | London | A rating |
| Du Bois Enterprises Ltd/TR Tropifresh | Leyton | A rating |
| du Boulay Projects Ltd | London | A rating |
| DU Clean Limited | Durham | A rating |
| Du Pont (U.K.) Industrial Limited | Derry | A rating |
| Du Pont (UK) Limited | Stevenage | A rating |
| Dua & Co Ltd | Watford | A rating |
| DUA AUTOS LTD | Romford, | A rating |
| DUA CAFE LTD | Manchester | A rating |
| DUA CONSTRUCTIONS LTD | London | A rating |
| DUA FRESH MEAT AND GROCERY LTD | Dagenham | A rating |
| Dua Lipa Limited | London | A rating |
| DUA LOFTS LTD | Dartford | A rating |
| DUA MANAGEMENT SERVICES LTD | Kingston Upon Thames | A rating |
| DUA PROPERTIES LTD | Rainham | A rating |
| Dua Wholesale Ltd | Peterborough | A rating |
| DUA'S GRILL LIMITED | Manchester | A rating |
| DUADATA Limited T/A Mooboo | London | A rating |
| DUAL LAYER IT SOLUTIONS (UK) LTD | LONDON | A rating |
| Dual Vertex Ltd | Greater Manchester | A rating |
| Dual-Stream Ltd | Ashton Under Lyne | A rating |
| Dualit Limited | Crawley, | A rating |
| Duality Quantum Photonics Limited | Bristol | A rating |
| DUAMENTES LTD | London | A rating |
| Duan & Duan UK LLP | London | A rating |
| Duane Morris | London | A rating |
| Duarte's Bakery LTD | Kinmel Bay - Rhyl | A rating |
| DUB Building Ltd | Kent | A rating |
| Dubai Cars Limited | Windsor | A rating |
| Dubai Equestrian Club UK Representative Office | Newmarket | A rating |
| Dubai Gold Jewellers Ltd | Manchester | A rating |
| Dubarry Technology Ltd | Egham | A rating |
| Dubit Limited | Leeds | A rating |
| DUBLIN AUTO SPARE PARTS TRADING UK LTD (15489767) | ENGLAND | UK Expansion Worker: Provisional |
| DUBLIN HALAL MEATS LIMITED | London | A rating |
| Dublin Meats Limited | London | A rating |
| Dubseo Limited | London | A rating |
| Ducati UK Limited | Towcester | A rating |
| DUCHY STORES LTD | Manchester | A rating |
| Duchy Veterinary Ltd | Redruth | A rating |
| Duck & Rice | London | A rating |
| Duck Creek Technologies Limited | London | A rating |
| DUCK Software Limited | Potters Bar | A rating |
| Duck Soup Films Ltd | Leeds | A rating |
| duckrabbit LTD | Birmingham | A rating |
| DUCKY PRODUCKTION LTD | London | A rating |
| Duco Technology Limited | London | A rating |
| DUCT & VENT LTD | Hertford | A rating |
| DUDDON VALLEY MEDICAL PRACTICE | KIRKBY-IN-FURNESS | A rating |
| DUDE Hub Ltd | London | A rating |
| Dudley Academies Trust | Dudley | A rating |
| Dudley Building Society | Brierly Hill | A rating |
| Dudley College of Technology | Dudley | A rating |
| Dudley Court Rest Home | Birmingham | A rating |
| Dudley Gas Station Limited | Dudley | A rating |
| Dudley Halal Butchers Limited | Dudley | A rating |
| DUDLEY LEARNING CENTRE LTD | Dudley | A rating |
| Dudley Oaks Limited | Dudley | A rating |
| DUDLEY PLASTICS, PLUMBING AND BATHROOMS LTD | Dudley | A rating |
| Dudley Road Dental Practice | Wolverhampton | A rating |
| DUDLEY ROAD HALAL MEAT LTD | Birmingham | A rating |
| Dudley Road Limited | Sandbach | A rating |
| Dudley Taylor Pharmacies Ltd | Warwick | A rating |
| Dudley Wood Surgery | Dudley | A rating |
| DUDLEYROADBARBER LTD | Winson Green | A rating |
| Dudra Food Suppliers Ltd T/A Zakariya Halal Meat | Harrow | A rating |
| Dudu N Girlie Limited | Bentalls | A rating |
| Due Limited | London | A rating |
| DUEL AUTOCARE LIMITED | Glossop | A rating |
| Duel Holdings Limited | London | A rating |
| DUELSTONE LTD | Milton Keynes | A rating |
| Duende Lab Limited | London | A rating |
| Duetto Research Limited | London | A rating |
| Duffel Technology Ltd | London | A rating |
| Duffets Stores | Ryde | A rating |
| Duffield Cricket Club | Duffield | A rating |
| Duffryn Ffrwd Manor Ltd | Nantgarw | A rating |
| Duflon Europe Limited | Slough | A rating |
| Dufrain Consulting Limited | Edinburgh | A rating |
| Dufton Stores | Leeds | A rating |
| Dugard and Daughters Limited | London | A rating |
| DUGGAL PROPERTIES & INVESTMENTS LTD | Gosforth | A rating |
| DUHA ENTERPRISE LTD | Birmingham | A rating |
| DUHOK BARBER LTD | Hatfield | A rating |
| Duigan Chiropractic LTD | Perth | A rating |
| Duke Austin & Company Ltd. | Tenbury Wells | A rating |
| Duke Beds Ltd | Wakefield | A rating |
| Duke Corporate Education Limited | London | A rating |
| Duke Medical Centre | Sheffield | A rating |
| Duke of Gordon Hotel | Kingussie | A rating |
| Duke of wellington | london | A rating |
| Duke Street Capital Limited | London | A rating |
| Duke Street Surgery | Barrow in Furness | A rating |
| Dukeberry Limited | Bromborough | A rating |
| Dukes Education Group Ltd | London | A rating |
| Dukes Glossop | Glossop | A rating |
| Dukes Head | Sunninghill | A rating |
| Dukes Hotel Ltd | London | A rating |
| Dukestown Store | Tredegar | A rating |
| Dukinfield Cricket Club | Dukinfield | A rating |
| Dukosi Limited | Edinburgh | A rating |
| DULAI DEEP BLUE LTD | HETTON LE HOLE | A rating |
| DULAI'S GOLDEN FISH & CHIPS | PETERLEE | A rating |
| Dulais Valley Primary Care Centre | Neath | A rating |
| Dulas Court Care Home | Hereford | A rating |
| Dulce's Cakes & Patisserie Ltd | Sevenoaks | A rating |
| Dulcedo Patisserie Limited | Cambridge | A rating |
| DULDUL LTD | Cheadle | A rating |
| Dulogix Ltd | Bardon | A rating |
| Dulrush Lodge | Enniskillen | A rating |
| Dulverton House | Scarborough | A rating |
| Dulwich Chiropractic Ltd | London | A rating |
| Dulwich College | London | A rating |
| Dulwich Dental Clinic Ltd | London | A rating |
| DULWICH ORTHODONTIC CENTRE | LONDON | A rating |
| Dulwich Picture Gallery | LONDON | A rating |
| Dulwich Prep & Senior | London | A rating |
| Dulwich Spice Ltd | London | A rating |
| Dulwich Sports Club Limited | London | A rating |
| Dum Factory Limited | Uxbridge | A rating |
| Duman Bold Street Ltd | Liverpool | A rating |
| Dumarey Flybrid Limited | Silverstone | A rating |
| Dumbleton Cricket Club | Evesham | A rating |
| Dumbo London Limited | London | A rating |
| Dumfries and Galloway College | Dumfries | A rating |
| Dumfries and Galloway Council | Dumfries | A rating |
| DUMFRIES FREIGHT LTD | Newry | A rating |
| Dumfries Visionplus t/a Specsavers Limited | Dumfries | A rating |
| DUMIKOLA FINE FOOD LTD | London | A rating |
| Dummond Hotel | limavady, derry | A rating |
| DUMOND MOVING & STORAGE LTD | LONDON | A rating |
| Dumpling Library | Belfast | A rating |
| dumpling shack uk ltd | london | A rating |
| Dun & Bradstreet Limited | London | A rating |
| Dun Cow Bar & Grill Ltd | Telford | A rating |
| Duna Films Ltd | London | A rating |
| Dunamis Healthcare Limited | Wellingborough | A rating |
| Dunamis Homes Limited | Ilford | A rating |
| Dunbai International Ltd | Bicester | A rating |
| Dunbar Road Design Limited | London | A rating |
| Dunbia (UK) | Llanelli | A rating |
| Duncairn Medical Practice | Belfast | A rating |
| Duncan & Griffin Limited T/A Silver Birch Hotel | Omagh | A rating |
| Duncan & Grove Ltd | ,Crawley | A rating |
| Duncan & Toplis | Grantham | A rating |
| DUNCAN ACCOUNTANCY SERVICES (UK) LIMITED | Lewisham | A rating |
| DUNCAN AND TODD LIMITED | Montrose | A rating |
| Duncan Farms Limited | Turriff | A rating |
| DUNCAN FARMS LIMITED | Aberdeenshire | A rating |
| Duncan Lewis Solicitors | London | A rating |
| Duncan Print Group Ltd | Welwyn Garden City | A rating |
| Dundalk Street Surgery | NEWRY | A rating |
| DUNDAR LEGAL SERVICES AND CONSULTANCY LIMITED | LONDON | A rating |
| Dundas Chemical Company Ltd | Dumfries | A rating |
| Dundas Chemical Company Ltd t/a Caledonian Proteins | Motherwell | A rating |
| Dundas Partners LLP t/a Dundas Global Investors | Edinburgh | A rating |
| Dundee Capital Investment Limited | Aberdeen | A rating |
| Dundee City Council | DUNDEE | A rating |
| Dundee Contemporary Arts | Dundee | A rating |
| Dundee Convenience & Underworld Vapes | Dundee | A rating |
| DUNDEE COURT DENTAL CENTRE LIMITED T/A SILVEROAK DENTISTRY | Kings Lynn | A rating |
| Dundee Islamic Society | Dundee | A rating |
| Dundee Rep and Scottish Dance Theatre Limited | DUNDEE | A rating |
| Dundonald House Nursing Home Ltd | Dundonald, Kilmarnock | A rating |
| Dundoran Nursing & Residential Home | Noctorum | A rating |
| Dune Advisors Limited | London | A rating |
| Dunedin Clinic | Exeter | A rating |
| DUNELM FOODSTORES LIMITED | DURHAM | A rating |
| Dunelm Group PLC | Leicester | A rating |
| Dunelm Medical Practice | Durham | A rating |
| Dunelm Retails Ltd | Newcastle upon Tyne | A rating |
| Dunfermline Athletic Football Club Ltd | Dunfermline | A rating |
| Dunfermline Chiropractic Clinic Ltd | Dunfermline | A rating |
| Dunfermline Visionplus Limited t/a Specsavers | Dunfermline | A rating |
| Dunfield House Limited | Kington | A rating |
| Dunham Swan Ltd | London | A rating |
| DUNHAMPTON RESTAURANT LTD T/a Spice Fusion Bar & Restaurant | STOURPORT ON SEVERN | A rating |
| Dunhill Financial Limited | LONDON | A rating |
| Dunhills (Pontefract) Plc T/A HARIBO | Pontefract | A rating |
| Dunkeld Opco Limited | Dunkeld | A rating |
| DUNKLEY & CO LIMITED | Bristol South Glos | A rating |
| Dunlady House Ltd | Belfast | A rating |
| Dunley Hall Ltd | Stourport On Severn | A rating |