| Dalata UK Limited | Cardiff | A rating |
| Dalet UK Limited | London | A rating |
| Dalkia UK Holding Limited | London | A rating |
| DALRADIAN GOLD LIMITED | OMAGH | A rating |
| Damartex UK Ltd | Bingley | A rating |
| Damm 1876 Ltd | Bedford | A rating |
| Dana Petroleum Limited | Aberdeen | A rating |
| Dana UK Axle Limited | Birmingham | A rating |
| DANA UK DRIVESHAFT LIMITED | Wellingborough | A rating |
| Danfoss Limited | Uxbridge | A rating |
| Dani Foods Limited | Boston | A rating |
| Daniel J Edelman Limited | London | A rating |
| DANIELI UK HOLDING LIMITED | Rotherham | A rating |
| Daniels Chilled Foods Ltd | Leeds | A rating |
| Danish Bake UK Ltd | London | A rating |
| Danish Crown UK Ltd | Rochdale | A rating |
| Danske Bank A/S, London Branch | London | A rating |
| Danske Commodities UK Limited | London | A rating |
| Danwood (UK Branch) Plc | Galashiels | A rating |
| Dar Al-Handasah Consultants (Shair & Partners) (UK) Ltd. | London | A rating |
| Daregal Gourmet Ltd | Long Stratton | A rating |
| Darkocean Marine Ltd. | Hampshire | A rating |
| Darwin Enterprise Limited | Essex | A rating |
| Dassault Systemes UK Ltd | Warwick | A rating |
| Data Center Erith Limited | Erith | A rating |
| Data Centre Dynamics Limited | LONDON | A rating |
| Data Intensity Limited | Chelmsford | A rating |
| Data Science Central UK Ltd. | London | A rating |
| Data Theorem Limited | London | A rating |
| Databricks UK Limited | London | A rating |
| DATACO INTERNATIONAL UK LIMITED | London | A rating |
| Datadog Ireland Limited | London | A rating |
| Dataiku Ltd | London | A rating |
| Datamatics Infotech Limited | Slough | A rating |
| Datamato Technologies Limited | Greater London | A rating |
| Datametica UK Limited | London, | A rating |
| Datamine International Ltd | Bristol | A rating |
| Dataminr UK Ltd | London | A rating |
| DATAPAO LIMITED | Nottingham | A rating |
| Datar Cancer Genetics UK Private Limited | Guildford | A rating |
| DataRobot UK LTD | Bristol | A rating |
| Datasite UK Ltd. | London | A rating |
| Datassential UK Limited | London | A rating |
| Datix Ltd t/a RL Datix Ltd | London | A rating |
| Datto Europe Limited | Reading | A rating |
| Davall Gears Ltd | Welham Green | A rating |
| David Zwirner Limited | London | A rating |
| Davidson Hospitality UK Limited | London | A rating |
| Davidson Kempner European Partners, LLP | London | A rating |
| Davies Global (CDL) Limited | London | A rating |
| Davis Polk & Wardwell London LLP | London | A rating |
| DAVITA INTERNATIONAL LIMITED | London | A rating |
| Dawson International (UK) Ltd. | London | A rating |
| Dawsongroup Limited | Milton Keynes | A rating |
| DAYFORCE EMEA LIMITED | Glasgow | A rating |
| Dazzling Engineering Ltd | Bristol | A rating |
| DB Cargo (UK) Limited | Doncaster | A rating |
| DB Group Services (UK) Ltd | London | A rating |
| DBJ Europe Limited | London | A rating |
| DBM Vircon Services (UK) Limited | Oxford | A rating |
| DBS Bank Ltd, London Branch | London | A rating |
| DBT LABS UK LIMITED | READING | A rating |
| DCC Holdings (UK) Limited | London | A rating |
| DDI UK Ltd | London | A rating |
| DE BEERS UK LIMITED | London | A rating |
| De Brauw Blackstone Westbroek London B.V. | London | A rating |
| De La Rue Limited | Basingstoke | A rating |
| De Lage Landen Leasing Limited | Watford | A rating |
| De Rosee Sa Ltd | London | A rating |
| Dealogic | London | A rating |
| Debevoise & Plimpton LLP | London | A rating |
| Debit Finance Collections Plc | Orchard Street | A rating |
| Decagon AI UK Ltd | London | A rating |
| Decathlon UK Ltd | London | A rating |
| Dechert LLP | London | A rating |
| Dechra Pharmaceuticals Holdings Limited | Northwich | A rating |
| Decimal Point Analytics Limited | Barking | A rating |
| Decision Inc. United Kingdom | London | A rating |
| Deckers Europe Ltd | LONDON | A rating |
| Decus Insurance Brokers Limited | London | A rating |
| Dedert International (UK) | Maidenhead | A rating |
| Deep Dock BV Limited | Middlesex | A rating |
| Deep Sea Rig (UK) Ltd | Eastleigh | A rating |
| DeepAlert Limited | Bromley | A rating |
| Deepfin Research Limited | London | A rating |
| DeepL UK Limited | LONDON | A rating |
| DeepOcean Subsea Services Limited | Aberdeen | A rating |
| DeepResponse Ltd | London | A rating |
| DEF-UK Ltd | Bristol | A rating |
| DEFACTO RETAIL UK LIMITED | London | A rating |
| DEFOR Limited | Cardiff | A rating |
| Deimos Space UK Limited | Didcot | A rating |
| DEKRA UK Management Ltd | Southampton | A rating |
| Delabie UK Limited | Wallingford | A rating |
| DeLaval Limited | Cardiff | A rating |
| Delaware North Companies (UK) Ltd | Uxbridge | A rating |
| DELEGATION OF THE GOVERNMENT OF CATALONIA TO THE UNITED KINGDOM LTD | London | A rating |
| Delifrance UK Ltd | Leicester | A rating |
| Delinian Limited | London | A rating |
| Deliverect Ltd | London | A rating |
| Dell Corporation Limited | London | A rating |
| Dellner Limited | Swadlincote | A rating |
| Deloitte LLP | London | A rating |
| Delphic HSE Solutions Limited | Camberley | A rating |
| Delpro Wind Ltd | Lowestoft | A rating |
| Delta Air Lines Inc | Hammersmith | A rating |
| DELTA CAPITA CONSULTING LTD | London | A rating |
| Delta Electronics (UK) Ltd | Hemel Hempstead | A rating |
| Delta Lighting Design | London | A rating |
| Delta Mobrey Ltd | Camberley | A rating |
| Deltapro Tech Ltd | London | A rating |
| Deltatre Limited | London | A rating |
| Deltec International Couriers Ltd | Hounslow | A rating |
| Deltek GB Ltd | Hammersmith | A rating |
| Deltroit Asset Management (UK) LLP | London | A rating |
| Deluxe 142 Limited | London | A rating |
| Deluxe Media Europe Limited | Perivale | A rating |
| Demandbase Limited | St. Albans | A rating |
| DemandScience UK Limited | London | A rating |
| Dematic Ltd | Banbury | A rating |
| Denham Capital Management (UK) LLP | London | A rating |
| DENIOS LIMITED | Newport | A rating |
| Denodo Technologies LTD | London | A rating |
| DENSO Automotive UK Ltd | COVENTRY | A rating |
| DENSO Manufacturing UK Limited | Telford | A rating |
| Denso Marston Limited | Bradford | A rating |
| Dentons Europe LLP | London | A rating |
| Dentons UK and Middle East Legal Services | London | A rating |
| DENTSU SOKEN UK, LTD. | London | A rating |
| Dentsu Sports Europe Limited | London | A rating |
| Dentsu: Global, Regional | London | A rating |
| Dentsu: London | London | A rating |
| Dentsu: Transition | London | A rating |
| Department for Business & Trade | LONDON | A rating |
| Depop Limited | London | A rating |
| Deposco UK Limited | London | A rating |
| DEPROM LV | LONDON | A rating |
| Deputy EMEA Limited | Slough | A rating |
| Derivco Holdings Limited | Richmond upon Thames | A rating |
| Descartes UK Agency Ltd | London | A rating |
| DESIGN ARC UK LIMITED | WATFORD | A rating |
| Design Bridge Ltd | London | A rating |
| Designer M & E Services UK Limited | London | A rating |
| Designit Denmark A/S (London branch) | London | A rating |
| DESIMONE CONSULTING ENGINEERING UK, LIMITED | London | A rating |
| DESWIK EUROPE LIMITED | London | A rating |
| DEUGRO (UNITED KINGDOM) LTD | Sunbury-On-Thames | A rating |
| Deutsche Leasing (UK) Limited | Redhill | A rating |
| Deutsche Pfandbriefbank AG London Branch | London | A rating |
| Deutsche Post Global Mail (UK) Ltd, t/a DHL Cross-Border Solutions UK | Staines-upon-Thames | A rating |
| Deutsche Telekom (UK) Limited | Welwyn Garden City | A rating |
| Deutsche Windtechnik Ltd | Livingston | A rating |
| Deutsche Windtechnik Offshore Limited | Lowestoft | A rating |
| Devbox Technologies Limited | London | A rating |
| Development Media International Associates CIC | London | A rating |
| Development Pathways Ltd | Sidcup | A rating |
| Devonport Royal Dockyard Limited | Devonport | A rating |
| Devoteam UK Ltd | London | A rating |
| Dexcom Operating Ltd | Edinburgh | A rating |
| Dext Software Limited | London | A rating |
| Dextra Construction UK Ltd | Wirral | A rating |
| DFDS Seaways PLC | North East Lincolnshire | A rating |
| DGB Europe Ltd | Abingdon | A rating |
| DH Liberty Limited | London | A rating |
| Dhani Ltd | Harrow | A rating |
| DHL Aviation (UK) Ltd | Derby | A rating |
| DHL GBS (UK) Limited | Milton Keynes | A rating |
| DHL Global Forwarding (UK) Ltd | Staines on Thames | A rating |
| DHL International (UK) Ltd | Slough | A rating |
| DHL Services Limited | Milton Keynes | A rating |
| DHOOT TRANSMISSION (UK) LTD | Kingston upon Hull | A rating |
| Diageo plc | London | A rating |
| DIALECT LIMITED | BATH | A rating |
| DIALECTICA LTD | LONDON | A rating |
| Dialpad UK Ltd | London | A rating |
| Diam UK Limited | Loughborough | A rating |
| Diameter Capital Partners (UK) LLP | London | A rating |
| Diamond Box Limited | West Bromwich | A rating |
| Diamond Resorts (Europe) Limited | Lancaster | A rating |
| DiaSorin Italia S.p.A UK Branch | Dartford | A rating |
| Diaverum UK Ltd | St Albans | A rating |
| DiDi Mobility UK Limited | London | A rating |
| Diebold Nixdorf (UK) Limited | Bracknell | A rating |
| Digicert UK Limited | London | A rating |
| DIGITAIKEN TECH CORPORATION LTD | Park Royal | A rating |
| Digital Applications International Limited | STOCKPORT | A rating |
| Digital Completion UK Limited | Leeds | A rating |
| Digital Medical Supply UK Ltd | London | A rating |
| Digital Mobile Innovations Limited | London | A rating |
| DIGITAL REALTY (UK) LIMITED | LONDON | A rating |
| Digital Science & Research Solutions Limited | London | A rating |
| Digital Surgery Limited | London | A rating |
| DIGITAL TRANSFORMATION CAPITAL PARTNERS UK LIMITED | London | A rating |
| Digital Uncut | London | A rating |
| Digital Workforce Services Ltd | Warwick | A rating |
| DIGITALAPICRAFT UK LTD | LONDON | A rating |
| DIGITALBRIDGE UK ADVISORS 1 LLP | LONDON | A rating |
| Digitally Inspired Limited | Guildford | A rating |
| DigitalOcean Droplet Limited | Walsall | A rating |
| DIGITISINGMART EUROPE LIMITED | London | A rating |