| DEF-UK Ltd | Bristol | A rating |
| DEFACTO RETAIL UK LIMITED | London | A rating |
| Defaqto Ltd | Haddenham | A rating |
| Defcode Ltd | London | A rating |
| Defected Records Limited | London | A rating |
| Defence Academy of the United Kingdom | Swindon | A rating |
| Defence Security Solutions Company Limited | Brentwood | A rating |
| DEFENCEART LTD | LONDON | A rating |
| DEFENDER PROPERTY SOLUTIONS LTD | London | A rating |
| Defense.com UK Ltd | Stevenage | A rating |
| DEFENX LIMITED | London | A rating |
| DEFEYENE LEGAL SOLUTIONS LIMITED | London | A rating |
| Defiant Enterprises Limited | Attleborough | A rating |
| Defibstore Ltd | Buxton | A rating |
| DEFICHI LTD | London | A rating |
| Define Planning and Design Limited | Birmingham | A rating |
| DEFINE SERVICES LTD | Kettering, Northamptonshire | A rating |
| Defined Wine Ltd | Canterbury | A rating |
| Definite Article Media Limited | London | A rating |
| DEFNE TRADING LIMITED | London | A rating |
| DEFOR Limited | Cardiff | A rating |
| DEG FOODS LTD | London | A rating |
| DEGH TEGH LTD | Ilford | A rating |
| Degiorgio Holdings Limited | Gillingham | A rating |
| Degould Limited | Exeter | A rating |
| Degusta Ltd | Bristol | A rating |
| DeHavilland Information Services Limited | London | A rating |
| Deheza Ltd | London | A rating |
| Dehoss Ltd | Cranleigh | A rating |
| Dehshid & Co Accountants | London | A rating |
| Deia Bidco Limited | Wells-Next-The-Sea | A rating |
| Deichmann-Shoes UK Limited | Market Harborough | A rating |
| Deighton Manufacturing (UK) Ltd | Bradford | A rating |
| Deighton Stores | Huddersfield | A rating |
| Deimos Cloud Ltd | London | A rating |
| Deimos Space UK Limited | Didcot | A rating |
| Deintyddfa Glandwr Dental Practice | Criccieth | A rating |
| Deiveega Kalasam Ltd T/A Haute Dolci Deansgate | Manchester | A rating |
| Deje Limited | London | A rating |
| DEKAHVIL LOGISTICS LTD | LONDON | A rating |
| Dekamed Limited | Bath | A rating |
| DEKBED UK LIMITED | Manchester | A rating |
| DEKEYSER GROUP PRACTICE | LEEDS | A rating |
| DEKO LTD | LONDON | A rating |
| Dekonil UK Ltd | Leicester | A rating |
| DEKRA UK Management Ltd | Southampton | A rating |
| Dekrastone Scotland Limited | Glasgow | A rating |
| Del Accountancy and Tax Support Limited | Hull | A rating |
| Del and Dee Ltd | Slough | A rating |
| Del Brickwork Limited | Slough | A rating |
| DEL Interiors (UK) Limited | London | A rating |
| Del Monte (UK) Ltd | Staines-upon-Thames | A rating |
| Delabie UK Limited | Wallingford | A rating |
| DelaControl Limited | Bristol | A rating |
| Delancey Investment Advisory Services Limited | London | A rating |
| Delaney Polo Team | Windsor | A rating |
| Delap and Waller Ltd | Antrim | A rating |
| Delapre Dental Care | Northampton | A rating |
| DeLaval Limited | Cardiff | A rating |
| Delaware Digital LLP | London | A rating |
| Delaware North Companies (UK) Ltd | Uxbridge | A rating |
| DELCE STORE LIMITED | ROCHESTER | A rating |
| DELCIOUS SPICE KITCHEN LTD | Milton Keynes | A rating |
| Delectable Foods Ltd | London | A rating |
| Delegat Europe Limited | London | A rating |
| DELEGATION OF THE GOVERNMENT OF CATALONIA TO THE UNITED KINGDOM LTD | London | A rating |
| Delfa Limited | London | A rating |
| DELFIELD PRECISION ENGINEERING CO LTD | Ruislip | A rating |
| Delfin Management UK Limited | London | A rating |
| Delfina Foundation | London | A rating |
| Delfinus LLP | London | A rating |
| Delfinus Partners Limited | London | A rating |
| Delft Investments Limited | London | A rating |
| Delga Press Limited | Rochester | A rating |
| DELHI 6 LOUNGE WESTOE LIMITED | South Shields | A rating |
| Delhi 6 Restaurant Limited | BIRMINGHAM | A rating |
| Delhi Brothers Limited | Basingstoke | A rating |
| Delhi Emperor Ltd t/a Delhi Emperor | Sunderland | A rating |
| DELHI LIVE LTD | Romford | A rating |
| Delhi Mirch Masala Ltd | Manchester | A rating |
| DELHI SPICE COTTAGE LTD T/A BOMBAY SPICE | Heathfield | A rating |
| Delhi Spice Indian Restaurant & Takeaway | worcester | A rating |
| Delhi Xpress Limited | Essex | A rating |
| DELI 29 LTD | Bradford | A rating |
| DELI 29 PARKSIDE LTD | Bradford | A rating |
| Deli 786 Ltd | Keighley | A rating |
| DELI BITE (UK) LTD | Bradford | A rating |
| Deli Chez (Leeds) LTD | Leeds | A rating |
| DELI LITES Ireland Ltd. | Newry | A rating |
| DELI MUNCH BOX LIMITED | keighley | A rating |
| Deli Spaces | London | A rating |
| DELI24 LTD | BLETCHLEY | A rating |
| Delian Alliance Industries UK Ltd | London | A rating |
| Delicasil Limited | Enfiled | A rating |
| DELICATE HOSPITALITY SERVICES LTD T/A DELICATE | Burton upon Trent | A rating |
| Delice de France | MIDDLESEX | A rating |
| DELICEUK LIMITED | Romford | A rating |
| DELICIOUS CATERING (2000) LIMITED | Uxbridge | A rating |
| Delicious Indian Cuisine Ltd | Fleckney | A rating |
| Delicious Pizza (Ashford) Ltd | Staines | A rating |
| Delicious Pizza (Kettering) Ltd | Luton | A rating |
| Delicious Pizza London Limited T/A Herbies Pizza | High Wycombe | A rating |
| Delifrance UK Ltd | Leicester | A rating |
| DELIGHT COFFEE LTD | LONDON | A rating |
| Delight Essential Services UK Limited t/a Dolphin Healthcare | Birmingham | A rating |
| Delight Foods (UK) Ltd | Birmingham | A rating |
| Delight Foods Scotland Ltd | Glasgow | A rating |
| DELIGHT FOODZ UK LTD | Liverpool, Merseyside | A rating |
| Delight Global Logistics UK Ltd | Harrogate | A rating |
| DELIGHT INDIAN CUISINE LIMITED | Worthing | A rating |
| DELIGHT MANAGEMENT SERVICES LTD | MANCHESTER | A rating |
| DELIGHT SUPPORT SERVICES LTD | SHEFFIELD | A rating |
| Delight Supported living Ltd | Letchworth Garden City | A rating |
| Delightful Care Ltd | Birmingham | A rating |
| DELIGHTFULLY FRESH LIMITED | WEMBLEY | A rating |
| Delights Food Limited | London | A rating |
| DELIGHTSDEN CHILDCARE LTD | London | A rating |
| DELILAURENT39 LTD | London | A rating |
| Delin Property Asset Management UK Ltd | London | A rating |
| Delin Ventures Advisors Limited | London | A rating |
| Delinea UK Limited | London | A rating |
| Delinian Limited | London | A rating |
| Delio Ltd | Cardiff | A rating |
| Delion's Daycare ltd | Luton | A rating |
| Delirium Limited T/A The Winery | London | A rating |
| Delish Foods Ltd T/A Japes Camden | Camden | A rating |
| Delish Fried Chicken | Folkestone | A rating |
| DELISH-DISH LIMITED | Sunderland | A rating |
| DELISYS TECHNOLOGIES LTD | NOTTINGHAM | A rating |
| Delivago Logistics Ltd | Coventry | A rating |
| Deliver Biosciences Limited | London | A rating |
| Deliver E Hub Ltd | Manchester | A rating |
| Deliverance AI Ltd | Newry | A rating |
| Deliverect Ltd | London | A rating |
| Deliveries 4 U Limited | NOTTINGHAM | A rating |
| Delivers.AI LTD | Warwick | A rating |
| Delivino Crieff Ltd. | Crieff | A rating |
| Delivix Limited | Glasgow | A rating |
| Delizia E3 Limited | London | A rating |
| DELIZIA FAST FOOD LTD | Derby | A rating |
| Delizie D'Italia Limited | London | A rating |
| DELIZIOSO 78 LIMITED | Farnham | A rating |
| Dell Care | Wymondgam | A rating |
| Dell Corporation Limited | London | A rating |
| Dellbray Ltd T/A Carmel | London | A rating |
| Delli Limited | London | A rating |
| DELLMOOR LTD | Romford | A rating |
| Dellner Glass Solutions Limited | Tamworth | A rating |
| Dellner Limited | Swadlincote | A rating |
| Dellonville Global Associates Ltd | Glasgow | A rating |
| DELLSHAW LIMITED | London | A rating |
| Delma Trade UK LTD | London | A rating |
| Delmar Systems Ltd | Aberdeen | A rating |
| DELMERGATE LIMITED | Kent | A rating |
| Delmon Pizza Limited | London | A rating |
| Deloitte LLP | London | A rating |
| DELPHI FOOD PRODUCTS LIMITED | LONDON | A rating |
| Delphi Services Ltd | Swindon | A rating |
| Delphic HSE Solutions Limited | Camberley | A rating |
| DELPHINE HOMECARE LIMITED | WESTERN SUPER MARE | A rating |
| Delphix Software Limited | Bracknell | A rating |
| Delphos Partners LLP | London | A rating |
| Delpro Wind Ltd | Lowestoft | A rating |
| Delrose House Ltd | Ilford | A rating |
| Delstron Process Engineers | Burton upon Trent | A rating |
| Delsys Europe Ltd | Sale | A rating |
| Delt Shared Services | PLymouth | A rating |
| Delta 4 Services Limited | London | A rating |
| Delta 5 Security Limited T/A Delta 5 Security | Eastham | A rating |
| Delta Academies Trust | Knottingley | A rating |
| Delta Air Lines Inc | Hammersmith | A rating |
| Delta Alpha Psi | Kidlington | A rating |
| DELTA CAPITA CONSULTING LTD | London | A rating |
| Delta Capita Ltd | London | A rating |
| DELTA CARE LTD | Preston | A rating |
| DELTA CEDAR LTD | Weybridge | A rating |
| DELTA CHESFORD GRANGE OP CO LIMITED T/A CHESFORD GRANGE | WARWICK | A rating |
| Delta Consulting Group Ltd | London | A rating |
| Delta Cosworth Limited | Silverstone | A rating |
| Delta Display Ltd | London | A rating |
| Delta Electrical Repairs Ltd | Nelson | A rating |
| Delta Electronics (UK) Ltd | Hemel Hempstead | A rating |
| Delta Energy Systems (UK) Ltd | East Klibride | A rating |
| DELTA ENGINEERS LTD | LONDON | A rating |
| Delta Executive Search Ltd | London | A rating |
| Delta Fire Engineering Ltd | Preston | A rating |
| DELTA FORCE GROUP LTD | Rainham | A rating |
| Delta H Consulting Ltd | London | A rating |
| Delta HV Limited | Polegate | A rating |
| Delta Lighting Design | London | A rating |
| Delta Marine t/a JIFMAR Scotland | Lerwick | A rating |
| Delta Mobrey Ltd | Camberley | A rating |
| Delta Obstruction Lighting Ltd | Rochdale | A rating |
| Delta Pharmaceutics Ltd | Chatham | A rating |
| DELTA PROFLOOR UK LTD | New Malden | A rating |
| Delta Rubber Imports Limited | Kidderminster | A rating |
| DELTA SERVICE STATION LTD | Mansfield | A rating |
| Delta Slaley Hall Op Co Limited Slaley Hall Hotel | Hexham | A rating |
| Delta Strategies Global Investors Limited | London | A rating |
| DELTA TECH GLOBAL LIMITED | London | A rating |