| Dentsu Sports Europe Limited | London | A rating |
| Dentsu: Global, Regional | London | A rating |
| Dentsu: London | London | A rating |
| Dentsu: Transition | London | A rating |
| DENUKAN NETWORK UK BR. LTD | Chelmsford | A rating |
| Denver Bars Ltd | London | A rating |
| Denville Hall 2012 | Northwood | A rating |
| DENYS NV UK | LONDON | A rating |
| Deol and Deol Sons Ltd T/A Eastender/ABS Grocers | Leicester | A rating |
| DEOL DENTAL GROUP | Coventry | A rating |
| Deol Haulage Ltd | Coalville | A rating |
| Deol Super Construction Ltd. | Southall | A rating |
| Deol's Convenience Stores Limited | Crewe | A rating |
| DEOW UK Ltd. | LONDON | A rating |
| Department for Business & Trade | LONDON | A rating |
| Department for Business, Energy & Industrial Strategy | London | A rating |
| Department for Culture Media and Sport | London | A rating |
| Department for Education | London | A rating |
| Department for Energy and Net Zero | London | A rating |
| Department for Science, Innovation and Technology | London | A rating |
| Department for Transport | London | A rating |
| Department for Work and Pensions | Sheffield | A rating |
| Department of Health & Social Care | Leeds | A rating |
| Depaul Northern Ireland | Belfast | A rating |
| Dependability | Greenford | A rating |
| Dependable Care LLP | Lye Stourbridge | A rating |
| DEPENDABLE HEALTH CARE LTD | Huddersfield | A rating |
| Dependable Home Care Services | Worcester | A rating |
| Dependable Social & Mental Health Limited | Abingdon | A rating |
| Dephna Group Limited | London | A rating |
| Depixus | CAMBRIDGE | A rating |
| Deplidge International Ltd. | Lytham St Annes | A rating |
| Deploy Ecommerce Limited | Stoke-on-Trent | A rating |
| Deploy Retail Services Ltd | Tonbridge | A rating |
| Deployflow Ltd | Bracknell | A rating |
| Depop Limited | London | A rating |
| Deposco UK Limited | London | A rating |
| DEPOT HIRE LTD | BERWICK UPON TWEED | A rating |
| Depotnet Ltd | Henley-in-Arden | A rating |
| DEPROM LV | LONDON | A rating |
| Dept Personalised Content Limited | London | A rating |
| Dept UK Holding Ltd | Manchester | A rating |
| DEPTFORD FOOD CENTRE UK LIMITED | LONDON | A rating |
| Deptford Super Market | London | A rating |
| Deputy EMEA Limited | Slough | A rating |
| Dera Baba Gobind Dass | Wolverhampton | A rating |
| Dera Care Limited | Rainham | A rating |
| Dera karahi ltd | Slough | A rating |
| DERA PARTNERSHIP LTD | Dagenham | A rating |
| Derby Bar Ltd t/a Tynant Spring Water | Ceredigion | A rating |
| Derby Care Home Ltd t/a Westside Nursing Home | Derby | A rating |
| Derby City Dental Care | Derby | A rating |
| Derby College | Derby | A rating |
| Derby Congregational Cricket Club | Derby | A rating |
| DERBY COUNTY (THE RAMS) LIMITED | Derby | A rating |
| Derby County Community Trust | Derby | A rating |
| Derby Dreamon Ltd | Guildford | A rating |
| DERBY ESTATES SERVICES LTD | Derby | A rating |
| Derby Foods Ltd TA Veggie Master Derby | Derby | A rating |
| Derby Halal Meat Limited | Derby | A rating |
| Derby Kfood Ltd | Derby | A rating |
| Derby Lodge (Preston) Limited | Preston | A rating |
| Derby Maintenance Ltd | Derby | A rating |
| Derby Medical Centre | Epsom | A rating |
| Derby Road Health Centre | Nottingham | A rating |
| Derby Street Pharmacy | Bolton | A rating |
| DERBY STREET PHARMACY | Stoke-on-Trent | A rating |
| DERBY TYRE & SERVICES LIMITED | Derby | A rating |
| Derbylane Medical LTD | Liverpool | A rating |
| DERBYROAD GROUP PRACTICE | PORTSMOUTH | A rating |
| DERBYSHIRE COMMUNITY CARE LTD | LOSCOE,HEANOR | A rating |
| Derbyshire Community Health Services NHS Trust | Chesterfield | A rating |
| Derbyshire County Council | Matlock | A rating |
| Derbyshire County Cricket Club Ltd | Derby | A rating |
| Derbyshire Healthcare NHS Foundation Trust | Derby | A rating |
| Derbyshire Home Care Services Ltd | Matlock | A rating |
| DerbySoft (UK) Limited | London | A rating |
| DERDES LIMITED T/A SIDS LOCAL | Burgess Hill | A rating |
| Dereham Pizza Limited T/A Caprinos Pizza | Dereham | A rating |
| Derek Parnaby Cyclones International Ltd | Chilton Nr. Ferryhill | A rating |
| Deri Promotions | Leeds | A rating |
| Derisk360 Ltd | London | A rating |
| Deriv Technologies Limited | Reading | A rating |
| Derivco Ipswich Ltd | Ipswich | A rating |
| Derive Care Ltd | Monmouth | A rating |
| Derivia Intelligence Limited | London | A rating |
| Derma Clinic Limited | London | A rating |
| Derma Consult Skincare Specialists LTD | London | A rating |
| DERMA REVIVE SKIN CLINIC LTD | London | A rating |
| DERMACARE LTD | London | A rating |
| Dermafocus Ltd | London | A rating |
| Dermal Future Limited | Peterborough | A rating |
| Dermalogica (UK) Limited | Leatherhead | A rating |
| Dermwise Clinics Limited | Llwyngwril | A rating |
| DERON HIRES Ltd T/A Tasty African Food | DARTFORD | A rating |
| Derpathfinder Ltd | Shankill, Belfast | A rating |
| Derriaghy Cricket Club | Belfast | A rating |
| Derriford House Limited | Fleet | A rating |
| Derry City Football Club LTD | Derry | A rating |
| DERRYDUFF FARM LTD | Dungiven | A rating |
| Derrylard Nurseries | Portadown | A rating |
| Derrys Ltd | Annaghmore | A rating |
| derschutze ltd | London | A rating |
| Dertour UK Limited T/A Detour UK | Dorking | A rating |
| DERW GLASS LTD | BONCATH | A rating |
| Derwent Residential Care Limited | St Leonards on Sea | A rating |
| Derwent Vale Farm Vets | Pickering | A rating |
| Derwent Valley Medical Practice | Derby | A rating |
| DES Composites Ltd | Sheffield | A rating |
| DES Energy Limited | Poulton Le Fylde | A rating |
| DES Healthcare Ltd | Lincoln | A rating |
| DES PARDES RESTAURANT LTD | Bradford | A rating |
| DES RAJ LTD | LEICESTER | A rating |
| DESAI BROTHERS CATERING PVT LTD | LEICESTER | A rating |
| Desai Care Homes | Bristol | A rating |
| Desai Regulatory Services Limited | Wimbledon | A rating |
| Desap Limited | Salford | A rating |
| DESARA PASTA RESTAURANT LTD | London | A rating |
| Desborough College Academy Trust | Maidenhead | A rating |
| DESBOROUGH NEWS LTD | Walthamstow | A rating |
| Descare Ltd | Bristol | A rating |
| Descartes UK Agency Ltd | London | A rating |
| DESCO (DESIGN & CONSULTANCY) LIMITED | Sunderland | A rating |
| DESERT HARBOUR UK LTD | Birmingham | A rating |
| Desford Dental Care | Desford | A rating |
| DESHI CUISINE LTD | CONWY | A rating |
| Deshi Deli Ltd T/A Maya Indian Restaurant | Eastleigh | A rating |
| DESHI FASHION LIMITED | Leicester | A rating |
| DESI BUILDING MATERIAL SUPPLIES LTD | London | A rating |
| Desi Cakes and Shakes Ltd | Oldham | A rating |
| DESI CATERING LTD | Thornton Heath | A rating |
| DESI CURRY LTD T/A DESI CURRY | Kingston Upon Hull | A rating |
| Desi Curry Palace | Glasgow | A rating |
| Desi Daru Ltd | London | A rating |
| DESI DERA RESTAURANT LIMITED | BIRMINGHAM | A rating |
| Desi Dhaba Veg Express Limited T/A Desi Dhaba | Wembley | A rating |
| Desi Downtown Limited t/a Desi Nights Downtown | Nottingham | A rating |
| Desi Food Club Limited | Glasgow | A rating |
| Desi Groom UK Ltd | London | A rating |
| DESI KHAZANA LIMITED | LEICESTER | A rating |
| Desi Kitchen And Grill Ltd | Immigham | A rating |
| DESI LOUNGE UK LIMITED | MANHCESTER | A rating |
| DESI OASIS LTD | London | A rating |
| DESI PRODUCTION UK LTD | Hayes | A rating |
| Desi Spice | Bradford | A rating |
| DESI STREET LIMITED | London | A rating |
| DESI STYLZ LTD T/A SALEEM TAWA & GRILL | MANCHESTER | A rating |
| Desi Swad Catering Ltd T/A Desi Swad | Hounslow | A rating |
| DESI TAILORING LTD | PRESTON | A rating |
| DESI TAILORS LIMITED | London | A rating |
| DESI TASTE DUDLEY LIMITED | Dudley | A rating |
| DESI TENT HIRE LIMITED | LEICESTER | A rating |
| Desi Wedding T/A Desi Wedding Limited | London | A rating |
| DESIDOSTH LTD T/A MIKOS | London | A rating |
| DesiFusion Food Ltd | West Feltham | A rating |
| Design & Build Builders Ltd | Watford | A rating |
| Design & Construct (London) Limited | Loughton | A rating |
| Design & Dine Ltd | London | A rating |
| DESIGN 1972 LTD | London | A rating |
| DESIGN AND BUILDING CONTRACTORS LTD | Manchester | A rating |
| Design and Management Consultants Ltd | Warrington | A rating |
| Design and Plan Consultants Ltd | Southall | A rating |
| DESIGN ARC UK LIMITED | WATFORD | A rating |
| Design Bridge Ltd | London | A rating |
| Design Build International Ltd | Colnbrook | A rating |
| DESIGN BUILD SAFELY LIMITED | Rochester | A rating |
| DESIGN BUNDLES LIMITED | Stoke-On-Trent | A rating |
| Design Cleaning Services (UK) Ltd | London | A rating |
| Design Engine Architects Ltd | Winchester | A rating |
| Design Fire Consultants Ltd | Leeds | A rating |
| Design for Leisure Ltd | Enfield | A rating |
| Design Ghar Limited | Ilford | A rating |
| Design ID Consulting Limited | Hillsborough | A rating |
| Design Innovation Ltd | Nottingham | A rating |
| Design Integration Ltd. | Didcot | A rating |
| Design is Alive Limited | Cambridge | A rating |
| Design MEP Limited | London | A rating |
| DESIGN OF DESSERT LIMITED | Dagenham | A rating |
| Design Research Limited | London | A rating |
| Design Si Solutions Ltd | Doncaster | A rating |
| Design Squared Ltd | London | A rating |
| DESIGN STOREY LIMITED | Oxford | A rating |
| Design Stories Limited | London | A rating |
| Design Studio Associates Ltd | London | A rating |
| Design to Rank Ltd | Glasgow | A rating |
| Design4Structures Ltd | London | A rating |
| Designability Charity Limited | Bath | A rating |
| Designcore Derby CIC | Derby | A rating |
| Designed by Woulfe Ltd | London | A rating |
| DESIGNEMBASSY LIMITED | London | A rating |
| DESIGNER FOOD CREATIONS LTD | OXFORD | A rating |
| Designer Jeans Ltd | London | A rating |
| Designer M & E Services UK Limited | London | A rating |
| Designers at Zoya's | Birmingham | A rating |
| DESIGNERS COLLECTION LTD | Greenford | A rating |
| Designers Guild Limited | London | A rating |
| Designhouse Consultants Ltd | London | A rating |
| Designific Limited | Reading | A rating |
| Designit Denmark A/S (London branch) | London | A rating |
| DESIGNITUDE ASSOCIATES LTD | London, | A rating |