| Dogs4Rescue | Irlam | A rating |
| Dohatech Healthservice Limited | Salisbury | A rating |
| DOHE EUROPE LTD | London | A rating |
| Doherty and Gray Limited | Ballymena | A rating |
| Doherty IT Solutions Ltd Trading As Doherty Associates | London | A rating |
| DOHERTY WOODSHAVINGS LTD | BALLYMENA | A rating |
| Dohler (UK) Limited | Milton Keynes | A rating |
| DOIT International UK&I Ltd | London | A rating |
| Doitsu Center Ltd., UK Branch | Leicester | A rating |
| Dojima Sake Brewery UK & Co | Ely | A rating |
| DOJO CONSTRUCTION LIMITED | Stonehouse | A rating |
| Doka UK Formwork Technologies Ltd | Sittingbourne | A rating |
| DOKMAH TRADING AND CONSTRUCTION LTD | London | A rating |
| Doktas Trading UK Ltd | Lichfield | A rating |
| Dolakha Bhimsen Limited | London | A rating |
| DolarApp UK Ltd | London | A rating |
| Dolby Europe Limited | London | A rating |
| Dolce & Gabbana UK Limited | Worthing | A rating |
| Dolce Leisure Group | London | A rating |
| Dolce Vita F A Ltd T/A Dolce Vita Restaurant | High Wycombe | A rating |
| Dollar Academy | Dollar | A rating |
| Dollhouse Fashions Limited | Dagenham | A rating |
| DOLLIS HILL TRADERS LTD | LONDON | A rating |
| DOLLMEAD LIMITED | LONDON | A rating |
| Dolloo Limited | London | A rating |
| Dolly's Food Ltd T/A Subway | Kent | A rating |
| Dollys News Ltd | LONDON | A rating |
| Dolma Kitchen | Eastbourne | A rating |
| DOLMEN DEVELOPMENT UK LTD | Middlesbrough | A rating |
| Dolon Limited | London | A rating |
| DOLOS LTD | Bracknell | A rating |
| Dolphin Care Agency LTD | Cardiff | A rating |
| Dolphin Drilling Limited | Aberdeen | A rating |
| DOLPHIN FISH LTD | Chesterfield | A rating |
| Dolphin Homes Ltd | Havant | A rating |
| Dolphin IT Solutions (UK) Ltd | Barnstaple | A rating |
| Dolphin Logistics Supply Chain Management UK Limited | London | A rating |
| DOLPHIN PERSONNEL LTD | Cannock | A rating |
| Dolphin School Limited | Reading | A rating |
| Dolphin Tensile Awnings | Dovercourt | A rating |
| DOLSMEDIA LTD | Birmingham | A rating |
| DOM INTERIORS (UK) LTD | GRAVESEND | A rating |
| Dom Uk Limited | Tipton | A rating |
| Doma Build Contractors Ltd | London | A rating |
| Doma Hospitality Limited | London | A rating |
| DOMAIN CARE NORTH WEST LTD | Manchester | A rating |
| Domaines Bournet-Lapostolle UK Limited | Chiddingfold | A rating |
| Domainex Limited | Saffron Walden | A rating |
| Dome Brands Limited | Worcester | A rating |
| Dome Consulting Ltd | London | A rating |
| Dome Group Financial Advisers Limited | London | A rating |
| Domestic & General Group Limited | Wimbledon | A rating |
| DOMESTIC GAS AND HEATING LTD | Southall | A rating |
| DOMESTIC UTILITIES SERVICES LTD | Blackburn | A rating |
| DOMESTIK APPLIANCES LTD | Birmingham | A rating |
| Dometic UK Awnings Limited | Witham | A rating |
| Dometic UK Limited | Blandford | A rating |
| Domex Limited | Epsom | A rating |
| Domi Domingo LTD | Leeds | A rating |
| Domicile Ltd | Hounslow | A rating |
| Domiciliary Care Experts Limited | Gillingham | A rating |
| Domiciliary Care Services (UK) Limited | Leicester | A rating |
| Domin Limited | Bristol | A rating |
| Dominic Care Limited | Fleet | A rating |
| Dominic Harrington Nurseries Ltd. | Wisbech | A rating |
| Dominic Harris Studio Ltd. | London | A rating |
| Dominican Missionary Sisters of the Sacred Heart of Jesus, CIO No.1168379 | Crawley | A rating |
| Dominican Sisters Of St Joseph | Lymington | A rating |
| Dominion Bierrum Limited | Milton Keynes | A rating |
| Dominion Childcare Limited | London | A rating |
| Dominion Consultancy Group | Wellinborough | A rating |
| DOMINION LOGIC SERVICES LTD | Faversham | A rating |
| DOMINION PROPHETIC OUTREACH MINISTRIES | ABBEYWOOD | A rating |
| DOMINION STORES | KENT | A rating |
| DOMINISH LTD | LIVERPOOL | A rating |
| Domino Data Lab Limited | London | A rating |
| DOMINO PRINTING SCIENCES PLC | BAR HILL | A rating |
| Domino Recording Company Ltd. | London | A rating |
| Domino's Pizza Group PLC | Milton Keynes | A rating |
| Dominus Aldgate Hotel Limited | London | A rating |
| Dominus Dixon Hotel Limited | Reading | A rating |
| Dominus Hospitality Management | London | A rating |
| Dominus St. Pauls Hotel Limited | Reading | A rating |
| Dominvs Aviation Limited | London | A rating |
| Dominvs Company Project 3 Ltd | Oxford | A rating |
| Domio Home Interiors Trading Ltd | London | A rating |
| Domis Construction | Wigan | A rating |
| DOMLYN LTD | Leicestershire | A rating |
| Domo Corporation Ltd | Slough | A rating |
| Domo Europe Limited | London | A rating |
| Domo Group Ltd | Bristol | A rating |
| Domo Tactical Communications (DTC) Limited | Whiteley | A rating |
| Doms Power Limited | Coventry | A rating |
| Domu Brands Limited | Manchester | A rating |
| DOMUK PIZZA | Peterborough | A rating |
| Don & Low Limited | Forfar | A rating |
| Don Albertoâ??s Leigh Ltd | Leigh | A rating |
| Don Construction Products Limited | Haverhill | A rating |
| Don Electronics Ltd | Leeds | A rating |
| DON GIOVANNI'S (KNUTSFORD) LIMITED | Manchester | A rating |
| Don Marco Ltd. | Manchester | A rating |
| Don Productions London Limited | London | A rating |
| DON VALLEY ENGINEERING GROUP LIMITED | Doncaster | A rating |
| DON'S ROCKET NEWS LTD | Liverpool | A rating |
| DONALD FLETCHER LTD | Mitcham | A rating |
| Donald Insall Associates | London | A rating |
| Donald Reid Limited | Wokingham | A rating |
| Donald Russell Limited | Inverurie | A rating |
| Donald S McGregor and Partners Ltd | Wick | A rating |
| Donald Stanley | Hoddesdon | A rating |
| Donald Ward Limited | Ilkeston | A rating |
| Donaldson Filtration (GB) Limited | Leicester | A rating |
| Donaldson Timber Engineering Limited | Fife | A rating |
| Donaldsons Services | Huddersfield | A rating |
| DONALS CHICKEN LTD T/A Donals Chicken | Croydon | A rating |
| DONAMIT LIMITED | Essex | A rating |
| Donatellos Pizza | Stockton-on-Tees | A rating |
| Donavalli Consulting Limited | Reading | A rating |
| Donburi Cho Ltd | London | A rating |
| Doncaster & Bassetlaw Hospitals NHS Foundation Trust | Doncaster | A rating |
| DONCASTER RACING LIMITED | York | A rating |
| DONCASTER ROAD DENTAL PRACTICE LIMITED | LEICESTER | A rating |
| Doncaster Rugby Football Club Limited | Doncaster | A rating |
| Doncaster Rugby League Club Limited | Doncaster | A rating |
| Doncaster Town Cricket Club | DONCASTER | A rating |
| Doncaster Townfields Squash Club CIC | Bennettorpe | A rating |
| Doncaster Visionplus Ltd t/a Specsavers | Doncaster | A rating |
| Doncasters Limited | Leeds | A rating |
| DONDON DINING LTD | Lodnon | A rating |
| DONE MEDIA CONCEPT & BRANDING SERVICES LTD | Edinburgh | A rating |
| DONEMANA CRICKET CLUB | STRABANE | A rating |
| Doner Base (Leyton) Ltd | London | A rating |
| Doner Gyros Reading Ltd T/A Mr T's | Reading | A rating |
| DONER GYROS TAUNTON LIMITED TA DONER GYROS | TAUNTON | A rating |
| DONER K1 CORPORATION LTD | Ilford | A rating |
| Donesol Tech Services Ltd T/A Dr Gadgets | Romforfd | A rating |
| DONEWELL PROPERTIES LTD | RUSHDEN | A rating |
| Dong Dao Group UK Limited | Maidenhead | A rating |
| Dong Fang Foods Ltd | London | A rating |
| DONG HWA IND UK LIMITED | Kingston upon Thames | A rating |
| DONG THINH STUDY OVERSEA CONSULTANCY LIMITED | LONDON | A rating |
| DONGRUN CONSTRUCTION UK LTD | London | A rating |
| DONGYI SOURCING UK LIMITED | LEICESTER | A rating |
| Donite Plastics LTD | Belfast | A rating |
| Donland Engineering Ltd | London | A rating |
| Donmac Farms LTD | COOKSTOWN | A rating |
| Donmar Warehouse | London | A rating |
| Donmar Warehouse Projects Ltd | London | A rating |
| Donna Nicol Physiotherapy & Associates Limited | London | A rating |
| Donna Wilson Ltd | London | A rating |
| DONNA'S UK COMMERCIAL TRADING LTD | London | A rating |
| Donnamu LTD. | New Malden | A rating |
| Donnell and Ellis Engineering Ltd | Castlederg | A rating |
| Donnelley Financial Solutions UK Ltd | London | A rating |
| Donnelly & Taggart (Ballymena) Ltd | Ballymena | A rating |
| Donnelly Bros (Belfast) Ltd | Newtownabbey | A rating |
| Donnelly Bros Garages (Dungannon) Ltd | Dungannon | A rating |
| Donnington Medical partnership | Oxford | A rating |
| DONNINGTON MEDICAL PRACTICE | TELFORD | A rating |
| Donoso Polo Ltd | Midhurst | A rating |
| Donostia Interiors Ltd | London | A rating |
| Donostia Restaurants Limited | London | A rating |
| Donot Name It Ltd | London | A rating |
| Dons Care Limited T/A Holly Cottage | Dereham | A rating |
| Donutelier London Limited | Barnet | A rating |
| Donuts N Chai Limited | Birmingham | A rating |
| Dooa Hair and Beauty | Park Royal | A rating |
| Doodle Recruitment Ltd | London | A rating |
| Dooggu Private Limited T/A GLOUCESTER ROAD SUPERMARKET | Bristol | A rating |
| DOON SPICE LIMITED | LEICESTER | A rating |
| Doonamis Limited | Shoeburyness | A rating |
| Door Loading Services UK Limited | Telford | A rating |
| Door Valley Ltd | Leicester | A rating |
| Door2Travel Limited | Harrow | A rating |
| Doorda Limited | London | A rating |
| Doordeck Ltd | Hastings | A rating |
| DOORFEED LTD | LONDON | A rating |
| DOORMAN RECRUITMENT LTD | Hounslow | A rating |
| Doosan Bobcat EMEA UK | Lancashire | A rating |
| DOOSAN DIGITAL INNOVATION EUROPE LIMITED | Renfrew | A rating |
| Doosan Power Systems S.A. (UK branch) | Crawley | A rating |
| Doosan Water UK Ltd | Birmingham | A rating |
| DOOZY VAPE CO. LTD | Dewsbury | A rating |
| Doppelmayr Cable Car UK Ltd | Birmingham | A rating |
| Dora Clothing Limited | London | A rating |
| Doran Consulting Limited | Belfast | A rating |
| DORAN KITCHENS LIMITED | NEWRY | A rating |
| Dorchester Care Homes Limited T/A Gwendoline House Residential Home | Bristol | A rating |
| Dorchester Community Church | Dorchester | A rating |
| DORCHESTER HOMES LONDON LTD | Hayes | A rating |
| Dorchester News Limited | Stockport | A rating |
| Dorchester Operations (No.1) Limited | Twickenham | A rating |
| DORCHESTER ROAD DENTAL LIMITED | Weybridge | A rating |
| Dorchester Visionplus Limited t/a Specsavers | Dorchester | A rating |
| Dorchester Visionplus Limited T/A Specsavers Opticians | Dorchester | A rating |
| Dorchesteruk Ltd | Manchester | A rating |
| Dorco U.K. Limited | London | A rating |
| Dore Partnership Limited | London | A rating |
| DOREEN BIRD COLLEGE OF PERFORMING ARTS | SIDCUP | A rating |
| DORFNER ANZAPLAN UK LIMITED | London | A rating |