| DARIZ LIMITED T/A KENT QUALITY FISH | KENT | A rating |
| Darjeeling Express Limited | London | A rating |
| DARJEELING SERVICES LIMITED | Huntingdon | A rating |
| Darjeeling Tours Limited | Mattersey | A rating |
| DARK AND CLOUD LTD | LONDON | A rating |
| Dark Energy Films Ltd | London | A rating |
| Dark Horse Digital Ltd | Altrincham | A rating |
| Dark KB Ltd | ELLON | A rating |
| DARK LUSSO LTD | London | A rating |
| Dark Matter Laboratories Limited | London | A rating |
| Dark Spark Consulting Ltd | Woking | A rating |
| DARK4 UK LTD | London | A rating |
| DARKDINE LTD | Glasgow | A rating |
| Darke and Taylor Limited | Witney | A rating |
| Darkocean Marine Ltd. | Hampshire | A rating |
| DARKSIDE DEVELOPMENTS | Barnsley | A rating |
| Darktrace Holdings Limited | Cambridge | A rating |
| Darkwear UK Limited | Croydon | A rating |
| DARLAMI FOOD LTD | TORQUAY | A rating |
| Darlaston Drink Shop Limited | Wednesbury | A rating |
| Darlaston Smith Ltd | Wednesbury | A rating |
| DARLATON DRINK SHOP LIMITED | Wednesbury | A rating |
| Darley Anderson and Associates Ltd. | London | A rating |
| Darling Creative Limited | London | A rating |
| Darlington Building Society | Darlington | A rating |
| Darlington Cricket & Athletic Club | Darlington | A rating |
| DARLINGTON HEALTHCARE LTD | DARLINGTON | A rating |
| Darlington Mowden Park Rugby Football Club Limited | Darlington | A rating |
| Darlington RACC | Darlington | A rating |
| Darnall Supplies Ltd | Sheffield | A rating |
| DARNALLFOOD LIMITED | Sheffield | A rating |
| Darnley Fisheries | Wakefield | A rating |
| DarntonB3 Limited | London | A rating |
| Daron Family Shopper | Port Talbot | A rating |
| Daron Services Ltd | Bridgend | A rating |
| Darren Evans Ltd | Bristol | A rating |
| Darren McMurran & Stewart McMurran | Banbridge | A rating |
| Darrenn Group Limited | London | A rating |
| Darrens Family Ltd | Wellingborough | A rating |
| Darroch Learg Hotel | Ballater | A rating |
| Darroch Nursing Home Ltd | Glasgow | A rating |
| Darryl Bird Ltd. | Redhill | A rating |
| Darshan Azad Limited | Southall | A rating |
| Darshprit | Oldbury | A rating |
| DARSONS HOMES LTD | Halifax | A rating |
| DART INFOTECH LIMITED | Bromley | A rating |
| Dart Security Services & Fm Ltd | Dartford | A rating |
| Dart Tool Group Ltd | Kirkcaldy | A rating |
| Dartbridge Systems Limited | Camberley | A rating |
| Dartford and Gravesham NHS Trust | Dartford | A rating |
| Dartford Clinic Ltd | Manchester | A rating |
| Dartford Food & Wine Limited | DARTFORD | A rating |
| Dartford Food Ltd | Kent | A rating |
| Dartford Grammar School | Dartford | A rating |
| Dartford Home Care ltd t/a Home Instead Dartford | Erith | A rating |
| Dartford Pharmacy Ltd | Dartford | A rating |
| Dartford Pizza Ltd | London | A rating |
| Dartford RIbeye Steakhouse Ltd | Kent | A rating |
| Dartington Service Design Lab | DEVON | A rating |
| Dartmouth Community Golf Club Limited | West Bromwich | A rating |
| Dartmouth Partners Limited | London | A rating |
| Darts Regulation Authority | London | A rating |
| DARUCHINI BRASSERIE (BINFIELD) LTD T/A DARUCHINI BRASSERIE | Berkshire | A rating |
| Daruchini Ltd | Baranrd Castle | A rating |
| Darul Amaan Trust | London | A rating |
| DARUL HADIS LATIFIAH NORTHWEST | OLDHAM | A rating |
| Darul Uloom Azizia Hussainia | London | A rating |
| DARUL-ILM | Dewsbury | A rating |
| Darussalam International Publications Ltd | Leyton | A rating |
| DARUSSALAM TRADERS LTD | London | A rating |
| DARWEN CRICKET CLUB | DARWEN | A rating |
| Darwen Healthcare (Dr M Ninan and Partners) | Blackburn | A rating |
| Darwen Pizza & Grill Ltd | Nelson | A rating |
| DARWIN CAMBRIDGE LIMITED | Cambridge | A rating |
| Darwin College | Cambridge | A rating |
| DARWIN DELTA LIMITED | London | A rating |
| Darwin Enterprise Limited | Essex | A rating |
| Darwin Evolution Technologies Ltd | London | A rating |
| Darwin Gray LLP | Cardiff | A rating |
| Darwin Medical Practice | Burntwood | A rating |
| DARYA DRY CLEANERS LTD | London | A rating |
| Daryoush Ghamari Sair T/A Market Street Dental Practice | Watford | A rating |
| Das & Sons Limited | St Albans | A rating |
| Das and Das Group Limited | Bushey | A rating |
| Das Blue Limited | Ipswich | A rating |
| DAS CARE LIMITED | Luton | A rating |
| DAS CONSULTANCY SERVICES LIMITED | London | A rating |
| DAS Fire | Reading | A rating |
| DAS INTERNATIONAL RECYCLING SOLUTION LIMITED | King's Lynn | A rating |
| Das Krupa Ltd | Manor Park | A rating |
| DAS SHOP LTD | BASILDON | A rating |
| DAS SPICE LTD t/a STAR OF INDIA | ARMAGH | A rating |
| DAS STORES LIMITED | Grays | A rating |
| DASA CONSULTING LTD | Edgware | A rating |
| Dasa Umbrella Limited | Edgware | A rating |
| Dasan United Limited | Newcastle upon Tyne | A rating |
| DASANAYAKE LIMITED | LEEDS | A rating |
| DASATVA LTD | FARNBOROUGH | A rating |
| Dascare Home Ltd | Wolverhampton | A rating |
| Dash Arts | London | A rating |
| Dash Care T/A Oak House Care Home | Axminster | A rating |
| Dash Games Ltd | Horsham | A rating |
| DASH LINEN HIRE (UK) LTD | London | A rating |
| Dash Pictures Ltd | London | A rating |
| Dash Testing Ltd | London | A rating |
| DASHI CONSTRUCTION LTD | London | A rating |
| Dashly Limited | London | A rating |
| Dashmesh Sikh Temple | Manchester | A rating |
| Dasht-E Morghab 1&1 Foods UK Limited | London | A rating |
| Dashwood Arms LTD | Kirtlington | A rating |
| Dashwood Brewer & Phipps Ltd | London | A rating |
| DASHWOOD INTERNATIONAL LIMITED | London | A rating |
| DASKI LTD | Crewe, England, | A rating |
| DASS & SONS LTD | Bolton | A rating |
| DASS CLUSTER LTD | Northolt | A rating |
| Dass Ltd | Exeter | A rating |
| DASS Self Service | London | A rating |
| Dassault Aviation Business Services UK Limited | Farnborough | A rating |
| Dassault Systemes UK Ltd | Warwick | A rating |
| DASSTAK LTD | Levenshulme | A rating |
| Dastaan Limited TA Dastaan | Epsom | A rating |
| Dastgyr UK Limited | Romford | A rating |
| Dasway Limited T/A Holden Bridge Service Station | Stoke On Trent | A rating |
| DAT 2000 Ltd ( T/A EliteAutocare ) | Rainham | A rating |
| Data 1St Ltd | SWINDON | A rating |
| DATA ANALYTICS & VISUALISATION LIMITED | Rickmansworth | A rating |
| Data and Marketing Association Ltd | London | A rating |
| Data Care Solutions | Hayes | A rating |
| Data Center Erith Limited | Erith | A rating |
| Data Centre Dynamics Limited | LONDON | A rating |
| Data Clarity Limited | Derby | A rating |
| Data Cloud Ltd | London | A rating |
| Data Connect Solutions Ltd | Reading | A rating |
| Data Conversion Systems Limited | Swavesey | A rating |
| Data Cubed Limited | Bristol | A rating |
| Data Design Solutions Limited | Iver | A rating |
| DATA ENERGY MANAGEMENT SERVICES LIMITED | Hertfordshire | A rating |
| Data Engineering Project Limited | Glasgow | A rating |
| DATA FIDELITY PVT LTD | London | A rating |
| Data HQ Ltd | Chelmsford | A rating |
| Data Inc UK Ltd | London | A rating |
| Data Intellect Services Limited | Belfast | A rating |
| Data Intelligance Services Ltd | London | A rating |
| Data Intensity Limited | Chelmsford | A rating |
| Data Interconnect Ltd | Watchfield | A rating |
| Data Kraken Consultancy Ltd | Oxford | A rating |
| Data Market Information Technology Ltd | London | A rating |
| Data OPS Limited | Radlett | A rating |
| Data Physics (UK) Ltd | Hailsham | A rating |
| Data Privacy Simplified Ltd | Bedford | A rating |
| Data Protection People Limited | Leeds | A rating |
| Data Science Central UK Ltd. | London | A rating |
| DATA SIP LIMITED | Glasgow | A rating |
| Data Socket Limited | London | A rating |
| Data Solutionz Limited | Milton Keynes | A rating |
| Data Spartan Limited | London | A rating |
| Data Technology Limited | Rickmansworth | A rating |
| Data Theorem Limited | London | A rating |
| DATA TRANS TECHNOLOGIES LIMITED | HOUNSLOW | A rating |
| Data Trek Technologies Ltd | London | A rating |
| DATA TRIALS SOLUTIONS LTD | Milton Keynes | A rating |
| DATA VISION SERVICES LTD | London | A rating |
| Data Vity Innovations T/A The Data City | Ilkely | A rating |
| Data Yield Limited | Milton Keynes | A rating |
| DATA2020 LTD | London | A rating |
| DATAACTIONS LIMITED | Birmingham, England | A rating |
| DataArt Technologies UK Ltd | London | A rating |
| Databarracks Ltd | London | A rating |
| Databook Labs UK Ltd | London | A rating |
| Databricks UK Limited | London | A rating |
| Databuzz Ltd | Slough | A rating |
| Datachoice Solutions Ltd | London | A rating |
| DATACO INTERNATIONAL UK LIMITED | London | A rating |
| Datactics | BELFAST | A rating |
| Datadog Ireland Limited | London | A rating |
| Dataflight Solutions Ltd | Abingdon | A rating |
| Dataflow Events Ltd | London | A rating |
| DATAFORM LAB LIMITED | London | A rating |
| DataGardener Solutions Limited | Eastleigh | A rating |
| DATAGENE LIMITED | Bishop's Stortford | A rating |
| Datagoat Limited | Guildford | A rating |
| Datagraphic Limited | RUGBY | A rating |
| Datagum Limited | London | A rating |
| Dataiku Ltd | London | A rating |
| Datalec Power Installations Limited | Buntingford | A rating |
| DATALEO AI LIMITED | London | A rating |
| Datalex Solutions(UK) LTD | Manchester | A rating |
| Datalineage Consulting Limited | Cardiff | A rating |
| Datalink Electronics Ltd | Loughborough | A rating |
| Datamaran Limited | London | A rating |
| Datamars Agri UK Ltd | Selkirk | A rating |
| Datamatics Infotech Limited | Slough | A rating |
| Datamato Technologies Limited | Greater London | A rating |
| Datambit Limited | London | A rating |
| DataMC UK Ltd | Wakefield | A rating |
| Datamellon Limited | London | A rating |
| Datametica UK Limited | London, | A rating |
| Datametric IT Solutions Ltd | London | A rating |
| DATAMINE DIGITAL LIMITED | Preston | A rating |
| Datamine International Ltd | Bristol | A rating |