| Mphasis UK Limited | London | A rating |
| MSI Computer (UK) Ltd | London | A rating |
| MTR Corporation Limited | London | A rating |
| MUFG Bank, Ltd. | London | A rating |
| Muller UK & Ireland Group LLP T/A Muller Milk & Ingredients | Market Drayton | A rating |
| Munich Re UK Services Limited | London | A rating |
| Mustang Engineering Limited | Woking | A rating |
| N Consulting Ltd | London | A rating |
| Nakano Asset Global Ltd | London | A rating |
| National Oilwell Varco UK Limited | Aberdeen | A rating |
| NautaDutilh | London | A rating |
| Navigator Gas | London | A rating |
| Nedbank Ltd | London | A rating |
| NETS International Limited | Redhill | A rating |
| Nexperia UK Ltd | Stockport | A rating |
| NFL International Limited | London | A rating |
| Nifco UK Limited | Stockton-on-Tees | A rating |
| Nihon Cyber Defence Ltd | Belfast | A rating |
| Nissan Motor Manufacturing (UK) Ltd | Sunderland | A rating |
| Nissan Trading Europe Ltd. | Sunderland | A rating |
| NNR GLOBAL LOGISTICS UK LIMITED | FELTHAM | A rating |
| Nomique Seating Limited | Telford | A rating |
| Norton Rose Fulbright LLP | London | A rating |
| Norwegian Hull Club - London Branch | London | A rating |
| Nova Systems (International )Ltd | Bournemouth | A rating |
| Novo Nordisk Ltd | Gatwick | A rating |
| NSI INDUSTRIAL O&M SOLUTIONS LTD | Truro | A rating |
| NTT Limited | London | A rating |
| NUCSOFT LTD | Wembley | A rating |
| Obaseki & Co LTD | London | A rating |
| Ocean Winds UK Ltd | Edinburgh | A rating |
| Octus Intelligence Limited | London | A rating |
| OPERIS GROUP PLC | LONDON | A rating |
| Oracle Solicitors and Consultants Ltd (Trading as Oracle Law Global) | London | A rating |
| Orica UK Ltd | Warrington | A rating |
| ORMAZABAL UK LIMITED | St. Helens | A rating |
| Orona Ltd | Sunbury-on-Thames | A rating |
| Orsted Power (UK) Limited | London | A rating |
| Oxford Instruments Nanotechnology Tools Limited | Abingdon | A rating |
| Pall Europe Ltd | Portsmouth | A rating |
| Palladium International Limited | London | A rating |
| Palram Europe Limited | Doncaster | A rating |
| Pan Pacific London Hotel Ltd | London | A rating |
| Parker Hannifin Manufacturing Limited | Hemel Hempstead | A rating |
| Partners Group (UK) Ltd. | London | A rating |
| PBP SERVICES | Fraserburgh | A rating |
| Perceptual Robotics Limited | BRISTOL | A rating |
| Pictet Asset Management Ltd | London | A rating |
| PIERRE FABRE LIMITED | London | A rating |
| Pinsent Masons LLP | Birmingham | A rating |
| PKF Littlejohn LLP | London | A rating |
| Polen Capital UK LLP | London | A rating |
| Prepay Technologies trading as PPS | Swindon | A rating |
| PricewaterhouseCoopers LLP | London | A rating |
| Princes Limited | Liverpool | A rating |
| PRODAPT (UK) LIMITED | READING | A rating |
| Projective Group UK Limited | London | A rating |
| Prysmian Cables & Systems Limited | Eastleigh | A rating |
| QinetiQ Group Plc | Farnborough | A rating |
| QX Limited | North Yorkshire | A rating |
| R Twining & Co Ltd | Andover | A rating |
| Random House Group Ltd | London | A rating |
| Rave Technologies (UK) Limited | Hemel Hempstead | A rating |
| Reckitt Benckiser Group Plc | Slough | A rating |
| REHAU Ltd | Ross-on-Wye | A rating |
| RELX (UK) Limited | London | A rating |
| REMY COINTREAU UK DISTRIBUTION LIMITED | London | A rating |
| RESINEX UK LIMITED | BUCKINGHAMSHIRE | A rating |
| Reynolds Porter Chamberlain LLP | London | A rating |
| Rhenus Home Delivery Limited | Manchester | A rating |
| Rhenus Logistics Limited | manchester | A rating |
| Rhomberg Sersa UK Limited | Sheffield | A rating |
| Ricardo plc | Shoreham by Sea | A rating |
| Rohlig UK Ltd | Middx | A rating |
| Rolls-Royce plc | Derby | A rating |
| RPC Containers Limited | Corby, | A rating |
| RWE Generation UK Plc | Swindon | A rating |
| RWE Renewables Management UK Limited | Wiltshire | A rating |
| RWE Supply & Trading GmbH | Swindon | A rating |
| Sacyr UK Limited | London | A rating |
| SAFE-door Industries Limited | Brampton | A rating |
| SafeRad Ltd | Durham | A rating |
| Salesforce UK Limited | London | A rating |
| Sasol UK Limited | London | A rating |
| Say Digital Limited | London | A rating |
| Schleich UK Ltd | Watford | A rating |
| Schroder Investment Management Limited | London | A rating |
| SCOTT BADER UK LIMITED | Wellingborough | A rating |
| ScottishPower Limited | Glasgow | A rating |
| SEAB Power Ltd | London | A rating |
| SEDAMYL UK LTD | Selby | A rating |
| Sedex Information Exchange Limited | London | A rating |
| Select Property Group Limited | Alderley Edge | A rating |
| Sent Entertainment Limited | London | A rating |
| Serimax ltd | Evanton | A rating |
| Severfield Commercial & Industrial Limited | Thirsk | A rating |
| Shell International Ltd | London | A rating |
| Siemens Holdings plc (including Siemens plc) | Camberley | A rating |
| Simmons & Simmons LLP | London | A rating |
| Simona Peak Pipe Systems Ltd | Chesterfield | A rating |
| Sinolingua London Limited | London | A rating |
| SISL INFOTECH UK LTD | UXBRIDGE | A rating |
| SIX Financial Information UK Ltd | London | A rating |
| Skadden,Arps,Slate,Meagher & Flom (UK) LLP | London | A rating |
| SKAT Logistics Ltd | London | A rating |
| SKF (U.K.) Limited | Luton | A rating |
| Slaughter and May | London | A rating |
| SMARTER GRID SOLUTIONS LTD | Glasgow | A rating |
| SMARTRENTAL REINO UNIDO LTD | London | A rating |
| Smurfit Kappa UK Limited | Liverpool | A rating |
| Sociedad Iberica de Construcciones Electricas S.A. | Reading | A rating |
| Socomec U.K. Limited | Cirencester | A rating |
| Sojitz Aerospace Corporation | London | A rating |
| Sojitz Global Finance plc | London | A rating |
| Sonardyne International Limited | Yateley | A rating |
| Sony Europe Limited | Weybridge | A rating |
| Sony Music Entertainment UK Limited | London | A rating |
| Southampton Container Terminals Limited trading as DP World Southampton | Southampton | A rating |
| SOUTHERN SPARS (UK) LIMITED | POOLE | A rating |
| Spherea Test & Services Ltd | Christchurch | A rating |
| SPIRAX SARCO LIMITED | CHELTENHAM | A rating |
| Sportradar UK Limited | London | A rating |
| Sprinklr UK Ltd | London | A rating |
| St. James's Place plc | Cirencester | A rating |
| Stagecoach Holdings Limited | Perth | A rating |
| Star Micronics GB Limited | Derby | A rating |
| State Street Bank and Trust Company | London | A rating |
| Statkraft UK Ltd. | London | A rating |
| Stephenson Harwood | London | A rating |
| STICKS 'N' SUSHI UK LIMITED | London | A rating |
| Stikeman Elliott LLP | London | A rating |
| Storck UK Limited | Basingstoke | A rating |
| STRABAG AG UK Branch | London | A rating |
| Strabag UK Limited | London | A rating |
| Structuretone Ltd | London | A rating |
| Subsea 7 (UK Service Company) Limited | Aberdeenshire | A rating |
| Sullivan & Cromwell LLP | London | A rating |
| Sumitomo Electric Wiring Systems (Europe) Ltd | Newcastle under Lyme | A rating |
| Sumitomo Mitsui Trust Bank Limited | London | A rating |
| Sun Chemical Ltd | Bath | A rating |
| Sutherland Digital UK Private Limited | London | A rating |
| Sweep London Limited | London | A rating |
| Swiss Finance & Property UK Ltd | London | A rating |
| Swiss Re Services Ltd | London | A rating |
| Swisslog (UK) Ltd | Redditch | A rating |
| SYMRISE LIMITED | Marlow | A rating |
| Synthomer plc | Harlow | A rating |
| Tabacalera SLU | London | A rating |
| Tata Consultancy Services | London | A rating |
| Tata Steel UK Limited | Port Talbot | A rating |
| Techlabs London Ltd | High Wycombe | A rating |
| TechnipFMC UK Limited | Aberdeen | A rating |
| Teraflow Ltd | Esher | A rating |
| Terex GB Limited | County Tyrone | A rating |
| TES-AMM UK Ltd | Cannock | A rating |
| Thales UK Limited | Reading | A rating |
| The Bank of Nova Scotia | London | A rating |
| The Bart Ingredients Co Ltd | Bristol | A rating |
| The Edrington Group | Glasgow | A rating |
| The Norinchukin Bank | London | A rating |
| The Toronto Dominion Bank | London | A rating |
| Theodo Ltd | London | A rating |
| Thermographic Measurements Co Ltd | Deeside | A rating |
| Thorn Lighting Ltd | Spennymoor | A rating |
| Thorn Security Limited | Sunbury On Thames | A rating |
| Thornton & Ross Limited | Nr Huddersfield | A rating |
| TIES AND MORE LTD | Lewisham | A rating |
| Tikehau Capital Europe Limited | London | A rating |
| TISSOT INDUSTRY UK Ltd | Crydon | A rating |
| Tokio Marine Kiln Insurance Services Ltd | London | A rating |
| Tony Gee and Partners LLP | Esher | A rating |
| Toshiba International (Europe) Limited | Staines Upon Thames | A rating |
| TotalEnergies Gas and Power Limited | Tadworth | A rating |
| Touchdown PR Limited | Basingstoke | A rating |
| Toyota | Derby | A rating |
| TSO SAS UK | London | A rating |
| Tsubakimoto UK Ltd | Annesley | A rating |
| TUI Travel Limited | Luton | A rating |
| Tullow Oil Plc | London | A rating |
| Ubisoft Reflections Ltd | Gosforth | A rating |
| UBS AG | London | A rating |
| Uchimura UK. Ltd | Co. Durham | A rating |
| Unicredit Bank GMBH London Branch | London | A rating |
| Unilever UK Limited | Kingston-upon-Thames | A rating |
| Uniper UK Ltd | Solihull | A rating |
| UNIPRES (UK) LIMITED | Sunderland | A rating |
| UNLIMINT EU LTD | London | A rating |
| Untha UK Ltd | Roecliffe | A rating |
| Unum Limited | Dorking | A rating |
| Urbaser Ltd. | Cheltenham | A rating |
| Van Lanschot Kempen Investment Management (UK) Limited | London | A rating |
| Van Oord | Henfield | A rating |
| Vanderlande Industries United Kingdom Limited | Solihull | A rating |
| Vattenfall Wind Power Ltd | London | A rating |
| Vectone Mobile Holding Limited | LONDON | A rating |
| Vestas Technology UK Limited | Newport | A rating |
| VIAVI Solutions UK Limited | Stevenage | A rating |
| Vodafone Group Services Limited | Newbury | A rating |
| Volvo Car UK | Maidenhead | A rating |
| Vorwerk UK Limited | Sunninghill | A rating |