| Dorgan Sports Horses Limited | Liphook | A rating |
| Dorian Restaurants Ltd | London | A rating |
| Doric Partners LLP | London | A rating |
| Doridge Limited T/A Daawat India And Beyond | Solihull | A rating |
| Doris CCTV LTD | London | A rating |
| Doris Engineering UK Limited | London | A rating |
| Dorix Ltd | London | A rating |
| Dorking Cricket Club | Dorking | A rating |
| Dorking Healthcare Ltd | Redhill | A rating |
| DORKING SUSHI LTD | Alton | A rating |
| Dorm Limited | London | A rating |
| dormakaba UK Ltd | Hitchin | A rating |
| Dormakaba UK Ltd. | Tiverton | A rating |
| Dormans Group Ltd | Magherafelt | A rating |
| Dormole Limited | Dartford | A rating |
| Dormy Care Communities (Hereford) Limited | Hereford | A rating |
| Dormy Care Communities South Ltd | London | A rating |
| Dornan Engineering Services Limited | London | A rating |
| Dornbracht UK Ltd. | Coventry | A rating |
| Dornier Group UK Ltd | Glasgow | A rating |
| DORNIZ FASHION & BEAUTY LTD | London | A rating |
| Dorodvand Developments Ltd | London | A rating |
| Dorothys Cardiff Ltd | Cardiff | A rating |
| DORRI LTD | London | A rating |
| DORRI LTD | Wembley | A rating |
| Dorridge Cricket Club | Dorridge | A rating |
| Dorrington House | Dereham | A rating |
| Dorset Council | Dorchester | A rating |
| DORSET COUNTRY HOTEL LIMITED | BRIDPORT | A rating |
| Dorset County Hospital NHS Foundation Trust | Dorchester | A rating |
| DORSET ENTERPRISE LTD T/A OLD HARBOUR FISH AND CHIPS | WEYMOUTH | A rating |
| DORSET HALL NURSERY PARKSIDE LIMITED | LONDON | A rating |
| Dorset HealthCare University NHS Foundation Trust | Poole | A rating |
| Dorset Home Care Limited (Trading as Home Instead Dorchester) | Dorchester | A rating |
| DORSET ISLAMIC CULTURAL ASSOCIATION T/A Poole Mosque | Poole | A rating |
| Dorset Mind | Bournemouth | A rating |
| DORSET NOODLE COMPANY LTD | BOURNEMOUTH | A rating |
| Dorset Opera | DORCHESTER | A rating |
| DORSET SECURITY SERVICES LTD | Bournemouth | A rating |
| Dorset Wellbeing Limited | Corfe Castle | A rating |
| DORSEY & WHITNEY (EUROPE) LLP | LONDON | A rating |
| Dortech Architectural Systems Ltd | Huddersfield | A rating |
| Dorway Limited | London | A rating |
| Dosa Bar Ltd | Swansea | A rating |
| Dosa Chef Limited T/A Your Favourites | NORTHAMPTON | A rating |
| DOSA DARLING | Oxford | A rating |
| DOSA HOUSE LIMITED | Dartford | A rating |
| DOSA HUT LTD T/A DOSA HUT RESTAURANT | WOLVERHAMPTON | A rating |
| Dosa Kitchen | Newcastle Upon Tyne | A rating |
| DOSA MAMA LIMITED | COVENTRY | A rating |
| DOSA N CHUTNEY LTD | London | A rating |
| Dosa N Sambal Express Ltd t/a Dosa N Sambal Express | London | A rating |
| DOSANJH DOUBLE GLAZING LTD | GRAVESEND | A rating |
| Doshaheen Solutions UK Limited | Watford | A rating |
| DOSHERO LIMITED | London | A rating |
| Doshi (London) Ltd | London | A rating |
| Doshi Accountants Limited | Croydon , London | A rating |
| Doshi App Limited | London | A rating |
| Doshi Levien Limited | London | A rating |
| DOSI CAMP LTD | LONDON | A rating |
| DOSIRAK LTD | London | A rating |
| Dost Catering Ltd | Porthcawl | A rating |
| Dosthill Fish Bar | Tamworth | A rating |
| Dostlar Ltd | London | A rating |
| Dot Dynamics ltd | Reading | A rating |
| DOT Enterprise Group Ltd | Woking | A rating |
| DOT Group Ltd | London | A rating |
| DOT IT CONSULTING LTD | Bristol | A rating |
| DOT MATERIAL TRADE LTD | Manchester | A rating |
| Dot Origin Limited | Godalming | A rating |
| Dot Signs & Prints Ltd | Manchester | A rating |
| Dot Square Lab Limited | London | A rating |
| Dot.com Glazing Ltd | Leicester | A rating |
| Dotcentric Limited | London | A rating |
| Dotdigital EMEA Ltd | London | A rating |
| DotEcon Ltd | London | A rating |
| doTERRA Europe Ltd | Milton Keynes | A rating |
| Dotfive Limited | Yeovil | A rating |
| Dotlines Holdings Limited | London | A rating |
| Dotmatics Limited | Hertfordshire | A rating |
| DotModus Limited | London | A rating |
| DOTNET SOLUTIONS UK LIMITED | Leeds | A rating |
| DOTNPIX MEDIA LIMITED | London | A rating |
| DOTPRINTUK LTD | London | A rating |
| DotSquares Ltd | Albourne | A rating |
| Dott Management Ltd | Esher | A rating |
| Dotted Eyes Solutions t/a Field Dynamics Ltd | Worcester | A rating |
| DOUBLE A EIGHT LIMITED | BLACKBURN | A rating |
| Double Ark Ltd | London | A rating |
| Double Click Design Ltd | Hull | A rating |
| Double Crown Healthcare Ltd | Beith | A rating |
| Double Eleven Limited | Middlesbrough | A rating |
| DOUBLE EM SERVICES LTD | Northampton | A rating |
| DOUBLE FIVE HOSPITALITY LIMITED | BOURNEMOUTH | A rating |
| Double G Studios Ltd | London | A rating |
| DOUBLE GLAZING WAREHOUSE LIMITED | Coventry | A rating |
| Double Impact Services | Nottingham | A rating |
| Double J Limited | BASILDON | A rating |
| Double Negative Limited | London | A rating |
| Double One Hospitality Limited | Banstead | A rating |
| Double R Racing Ltd | Woking | A rating |
| DOUBLE RED 359 | PETERHEAD | A rating |
| Double S Builder Ltd | Harrow | A rating |
| Double Seven Hospitality Ltd | London | A rating |
| Double Six Hospitality Ltd | London | A rating |
| Double Three Ltd | Lightwater | A rating |
| DOUBLE WINGS INTERNATIONAL LTD | Bloomsbury | A rating |
| DOUBLE Y JESMOND LTD | Newcastle Upon Tyne | A rating |
| Double Y Ltd | Newcastle Upon Tyne | A rating |
| DOUBLE Y SEABURN LTD | Newcastle Upon Tyne | A rating |
| Double zero pizzeria ltd | Manchester | A rating |
| DOUBLELIGHT TECHNOLOGY LIMITED | Harlow | A rating |
| Doubletree by Hilton London Elstree | Borhamwood | A rating |
| DoubleVerify Ltd | London | A rating |
| Dougal Inns Ltd | Caterham On The Hill | A rating |
| Dougall Off Licence Limited | Coventry | A rating |
| DOUGALTOWN LTD T/A Sylhet Tandoori Restaurant And Takeaway | Cambridgeshire | A rating |
| Dough & Fire Ltd t/a Dough and Fire | Birmingham | A rating |
| Dough Bro Pizza Ltd t/a Crust Bros | London | A rating |
| Dough Eyed Limited | York | A rating |
| Doughlicious Ltd | London | A rating |
| Doughnut Time (UK) Ltd | London | A rating |
| Douglas and Grahame Ltd | Belfast | A rating |
| Douglas Huston LLP | Belfast | A rating |
| Douglas Knowledge Partners UK Ltd | London | A rating |
| Douglas Wynd Grocers and Sandy Post Office | Broxburn | A rating |
| DOULAITOU MANAGEMENT LIMITED | LIVERPOOL | A rating |
| Doulton Court Care Home | Mablethorpe | A rating |
| Dounemount Care Home | Banff | A rating |
| Douneside House | Aberdeenshire | A rating |
| DOUX CHATON LIMITED | WIDNES | A rating |
| Dove Dental & Wellbeing Spa | London | A rating |
| Dove House London Limited | London | A rating |
| Dove River Practice | Ashbourne | A rating |
| Dovecare Services Limited | Derby | A rating |
| Dovecot Dental Practice | Liverpool | A rating |
| Dovecot Studios Ltd | Edinburgh | A rating |
| Dovecote Care Homes Limited | Braintree | A rating |
| Dovedale Dental Practice | Wolverhampton | A rating |
| DOVEDALE DEVELOPERS LIMITED | Lodnon | A rating |
| Doveleigh Care Limited | Seaton | A rating |
| Dover College | Dover | A rating |
| Dover District Council | Dover | A rating |
| DOVER FAVORITE CHICKEN LTD T/A Favorite Chicken | Dover | A rating |
| Dover Fueling Solutions UK Ltd | Dundee | A rating |
| Dover Grammar School for Boys | Dover | A rating |
| Dover Harbour Board | Dover | A rating |
| Dover Holdings UK Ltd | London | A rating |
| DOVER HOTEL | LONDON | A rating |
| Dover House (GC) Limited | Dover | A rating |
| Dover International supermarket | Dover | A rating |
| Dover Marina Hotel & Spa, Tapestry Collection by Hilton | Kent | A rating |
| Dover Store Ltd | Dover | A rating |
| Dover Street Logistics Limited | London | A rating |
| DOVER STREET MARKET INTERNATIONAL DSMI Ltd | London | A rating |
| Dover Visionplus Ltd t/a Specsavers | Dover | A rating |
| Dovercourt Surgery | Sheffield | A rating |
| Doves Care Agency Ltd | Hemel Hempstead | A rating |
| Doves Care and Support Limited | Stafford | A rating |
| DOVES CONTRACT CLEANING LTD | LONDON | A rating |
| Doves Farm Foods Ltd | Hungerford | A rating |
| Doves Healthcare Ltd | Guildford | A rating |
| Dovestone Estates Limited T/A Wray Common Nursing & Residential Home | Reigate | A rating |
| DOVETAIL IT SUPPORT LIMITED | London | A rating |
| DOVISTA UK Limited | Huntingdon | A rating |
| Dow Chemical Company Limited | Cheadle | A rating |
| Dow Jones International Limited | London | A rating |
| Dow Properties Limited | Edgware | A rating |
| Dowbusz Property LTD | Sheffield | A rating |
| Dowdales School | Dalton-in-Furness | A rating |
| Dowhigh Limited | Liverpool | A rating |
| Dowie Investments (UK) Limited | London | A rating |
| Dowlais Group Headquarters Limited | London | A rating |
| Down and Out London Ltd | London | A rating |
| Down Developments Ltd | Newry | A rating |
| DOWN HALL CARE LTD | ESSEX | A rating |
| Down Street Electrics Limited t/a Mr Resistor | LONDON | A rating |
| Down Syndrome International | Exmouth | A rating |
| DOWNBAY LTD T/A LINESIGHT | LONDON | A rating |
| Downe Catering Ltd | London | A rating |
| Downe House School | Thatcham | A rating |
| Downend Cricket Club | Bristol | A rating |
| Downend Health Group | Downend | A rating |
| DOWNES EQUINE LTD | STOKE ON TRENT | A rating |
| DOWNEY BARS LIMITED T/A THE BANK BAR AND BISTRO | NEWRY | A rating |
| Downfield Mini Market | Dundee | A rating |
| Downforce Technologies Limited | London | A rating |
| Downham Associates Ltd | Blackburn | A rating |
| Downham Baptist Church | Bromley | A rating |
| DOWNHAM PETROLEUM COMPANY LIMITED | Norfolk | A rating |
| Downham Stow Cricket Club | Kings Lynn | A rating |
| Downhole Products Limited | Aberdeen | A rating |
| Downing College | Cambridge | A rating |
| Downing Dental Limited | Solihull | A rating |
| Downing LLP | London | A rating |
| Downlands Care Ltd | Pinner | A rating |
| Downside Abbey | Bath | A rating |
| Downside House Residential Care Home | Ventnor | A rating |
| Downside Primary School | Luton | A rating |
| Downside School | Radstock | A rating |