| Remitly U.K., Ltd | London | A rating |
| Remote Technology Services LTD | London | A rating |
| REMY COINTREAU UK DISTRIBUTION LIMITED | London | A rating |
| Renaissance Capital Limited | London | A rating |
| Renaissance Learning UK Limited | Swindon | A rating |
| Renaissance Learning UK Ltd | London | A rating |
| Renaissance Strategic Advisors Ltd | London | A rating |
| RenaissanceRe Syndicate Management Limited | London | A rating |
| Renault Retail Group Limited | London | A rating |
| Rendel Limited | London | A rating |
| Renesas Design (UK) Limited | Bourne End | A rating |
| Renesas Electronics Europe GmbH | Bourne End | A rating |
| Renesco UK Limited | London | A rating |
| Renishaw plc | Wotton-under-Edge | A rating |
| Rentokil Initial 1927 plc | Crawley | A rating |
| Repligen UK Ltd | Altrincham | A rating |
| Replimune Limited | Abingdon | A rating |
| Reply Limited | London | A rating |
| REPROCELL Europe Ltd | Glasgow | A rating |
| Reproductive Health Group | Warrington | A rating |
| Repsol Resources UK Limited | Aberdeen | A rating |
| Repsol Sinopec Resources UK Limited | Aberdeen | A rating |
| Reputation (RI) UK Limited | London | A rating |
| RES Ltd | Kings Langley | A rating |
| Rescale UK Limited | London | A rating |
| Research Affiliates Global Advisors (Europe) Limited | London | A rating |
| RESEARCH OBJECTIVE CONSULTING INDUSTRIAL UK LIMITED | London | A rating |
| Research Triangle Institute | Greater Manchester | A rating |
| RESERVE BANK OF AUSTRALIA | LONDON | A rating |
| Reservoir Group Limited | Blackburn | A rating |
| RESINEX UK LIMITED | BUCKINGHAMSHIRE | A rating |
| Resistant AI Limited | Warwick | A rating |
| ResMed (UK) Limited | Didcot | A rating |
| Resolute Corporate Services UK Limited | London | A rating |
| Resolute Management Limited | London | A rating |
| Resolve Salvage & Fire (Europe) Limited | London | A rating |
| Resources Connection (UK) Limited | London | A rating |
| Restless Development | London | A rating |
| Retail Finance Intelligence Ltd | London | A rating |
| Retail Insight Ltd. | Richmond | A rating |
| Retailmenot UK Limited | London | A rating |
| RETAILNEXT BVI UK LTD | MILTON KEYNES | A rating |
| RETARUS (UK) LTD | Reading | A rating |
| Rethink Priorities UK Ltd | Eastbourne | A rating |
| Retool UK Limited | London | A rating |
| Reuters News & Media Ltd | London | A rating |
| Revantage Global Services UK Limited | London | A rating |
| Revenue Management Solutions Limited | London | A rating |
| Reverb B.V. | Brighton | A rating |
| Revionics Limited | London | A rating |
| Revlon International Corporation | London | A rating |
| Revolut Ltd | London | A rating |
| Revvity (UK) Holdings Limited | Llantrisant | A rating |
| Reward Gateway (UK) Limited | London | A rating |
| Reward Gateway (UK) Ltd | London | A rating |
| Rex Labs Ltd | London | A rating |
| REXEL UK LIMITED | Birmingham | A rating |
| Reynolds Porter Chamberlain LLP | London | A rating |
| Rezayat Europe Ltd | London | A rating |
| RFM Investments UK Limited | London | A rating |
| RG Hotels UK Ltd | London | A rating |
| RGA Uk Services Ltd | London | A rating |
| RGIS INVENTORY SPECIALISTS LIMITED | Birmingham | A rating |
| RH London Gallery Ltd | Banbury | A rating |
| Rhea Space Activity UK, Ltd. | Edinburgh | A rating |
| Rheinmetall BAE Systems Land Limited | Telford | A rating |
| Rheinmetall Technical Publications UK (RTP UK Ltd) | Bristol | A rating |
| Rhenus Home Delivery Limited | Manchester | A rating |
| Rhenus Logistics Limited | manchester | A rating |
| Rhinetex United Kingdom Ltd. | Peterborough | A rating |
| Rhino Products | Ellesmere Port | A rating |
| Rhobus Limited | London | A rating |
| Rhomberg Sersa UK Limited | Sheffield | A rating |
| RHONE GROUP LLP | LONDON | A rating |
| RIA Advisory LTD | London | A rating |
| RIB UK&I Limited | London | A rating |
| Ribbon Communications UK Ltd | Maidenhead | A rating |
| Ricardo Performance Products Ltd | Shoreham by Sea | A rating |
| Ricardo plc | Shoreham by Sea | A rating |
| Ricardo-AEA Limited | Didcot | A rating |
| Rich Ocean Group (UK) Limited | London | A rating |
| Rich Products Limited | Andover | A rating |
| Richemont International Limited | London | A rating |
| Richmond Accounting & Advisory Ltd | Richmond Upon Thames | A rating |
| Richstone Properties Construction Ltd | London | A rating |
| Ricoh Europe PLC | London | A rating |
| Ricoh Printing Solutions Europe | Telford | A rating |
| Ricoh UK Products Ltd | Telford | A rating |
| Ride Therapeutics Limited | Cambridge | A rating |
| Riedel Communications Ltd | Harefield | A rating |
| Rigby & Peller Ltd | London | A rating |
| Rigetti UK Limited | London | A rating |
| Right To Play International | London | A rating |
| RightShip UK Ltd | London | A rating |
| Rightsline Software UK Ltd | London | A rating |
| RigNet UK Limited | Westhill | A rating |
| Rimes Technologies Limited | London | A rating |
| RINA Tech UK Limited | Leatherhead | A rating |
| Ring London Advertising Ltd | London | A rating |
| RingCentral UK Ltd | London | A rating |
| Rio Tinto Plc | London | A rating |
| Riot Games Services Limited | London | A rating |
| Ripple Markets UK Ltd | London | A rating |
| Rippling UK Limited | London | A rating |
| Rishabh Info Services Pvt Ltd | Harrow | A rating |
| Risk Capital Advisors Limited | London | A rating |
| Riskcare Limited | London | A rating |
| RISKIFIED UK LTD | LONDON | A rating |
| Riskonnect Ltd | London | A rating |
| RISKPOYNT LTD | Poole | A rating |
| Riso Kagaku Corporation London Office | Watford | A rating |
| Rite Track Scotland Limited | Edinburgh | A rating |
| Rithm Capital Ltd | London | A rating |
| Rithum CA UK Limited | London | A rating |
| Rittal-CSM Ltd | Plymouth | A rating |
| Ritz Tours Limited | London | A rating |
| RIV UK Engineering Limited | London | A rating |
| Riverbed Technology Limited | London | A rating |
| RiverRock European Capital Partners LLP | London | A rating |
| Riverside Europe Partners LLP | London | A rating |
| Rivi Partners UK Limited | London | A rating |
| Rivos Systems UK Limited | Cheltenham | A rating |
| Riyad Bank London Branch | London | A rating |
| Rizing Limited | London | A rating |
| RJ Corp International (UK) Pvt Ltd | London | A rating |
| RJI Capital (UK) Limited | London | A rating |
| RL Retail Services Limited | Watford | A rating |
| RLE International Product Development | Essex | A rating |
| RLG International Limited | London | A rating |
| RM & Partners UK Limited | London | A rating |
| RM Auctions Limited | Richmond Upon Thames | A rating |
| RMD Kwikform Limited | Walsall | A rating |
| RMSI Limited | Reading | A rating |
| RN ClearPoint Learning Systems UK Ltd | London | A rating |
| Roaming Network Solutions Ltd | London | A rating |
| Robeco Institutional Asset Management UK Limited | London | A rating |
| Robert Bird & Partners | London | A rating |
| Robert Bosch Ltd | Uxbridge | A rating |
| Robert Half Limited | Solihull | A rating |
| Robert W. Baird Group Ltd | London | A rating |
| Robert Walters PLC | London | A rating |
| Robinhood U.K Ltd. | London | A rating |
| Robit GB Ltd | Chesterfield | A rating |
| Robosys Automation Ltd | Southampton | A rating |
| Robt. Jones UK Limited | Glasgow | A rating |
| ROC NATION UK LIMITED | London | A rating |
| Rocco Forte & Family (Hotel Management) Limited | London | A rating |
| Roche Diagnostics Limited | Burgess HIll | A rating |
| Roche Products Limited | Welwyn Garden City | A rating |
| Rock Paper Reality UK Ltd | Bristol | A rating |
| Rock Rail Holdings Limited | London | A rating |
| Rock Solid Processing Ltd | Exeter | A rating |
| Rock-it Cargo Limited | Middlesex | A rating |
| Rocket Music Management Limited | London | A rating |
| RocketMill Ltd | Brighton | A rating |
| Rockline Industries Limited | Redditch | A rating |
| Rockstar Games UK Limited | Edinburgh | A rating |
| Rocksteady Studios Limited | London | A rating |
| Rockwell Automation UK Ltd | Milton Keynes | A rating |
| Rockwood Specialties Limited | London | A rating |
| Rockwool Ltd | Bridgend | A rating |
| Rode (UK) Ltd | Marlow | A rating |
| Roeslein & Associates, Ltd. | Northampton | A rating |
| Roger Bullivant Limited | Swadlincote | A rating |
| Rogo Technologies Ltd | London | A rating |
| Rohde & Schwarz Services Limited | Fleet | A rating |
| Rohlig UK Ltd | Middx | A rating |
| Rokos Services (UK) Limited | London | A rating |
| Roku UK Limited | Cambridge | A rating |
| Roland Berger | London | A rating |
| Roland Europe Group Limited | Reading | A rating |
| Rolepoint Limited | LONDON | A rating |
| ROLINE TECHNOLOGY (UK) LIMITED | London | A rating |
| ROLLER Networks LTD | London | A rating |
| Rolls-Royce plc | Derby | A rating |
| Rolta UK Limited | Reading | A rating |
| Romax Technology Limited | Nottingham | A rating |
| Romi Machines UK Ltd | Rugby | A rating |
| Rondia LLP | London | A rating |
| Rongxin Power Limited | Altrincham | A rating |
| Roofoods Ltd t/a Deliveroo | London | A rating |
| Roots Systems Ltd | Stonehouse | A rating |
| ROPES & GRAY INTERNATIONAL LLP | LONDON | A rating |
| ROSEN(UK) | Newcastle Upon Tyne | A rating |
| Rosenxt UK Ltd | Aberdeen | A rating |
| Rosetti Marino UK Limited | London | A rating |
| Roshana Global Limited | Esher | A rating |
| Ross Video (UK) Limited | London | A rating |
| Rota Geek Limited | Horsham | A rating |
| Rothschild & Co Global Markets Solutions Limited | London | A rating |
| Rothschild & Co Wealth Management UK Limited | London | A rating |
| Rotork Controls Ltd | Bath | A rating |
| Rouse International Limited | London | A rating |
| Route Mobile (UK) Limited | London | A rating |
| Rover Engineering Limited | Cardiff | A rating |
| Rovi Europe Ltd, a TiVo company | London | A rating |
| ROVISYS UK PRIVATE LIMITED | London | A rating |
| Roxane (UK) Ltd | Lichfield | A rating |
| Royal Academy of Dance | London | A rating |
| Royal Air Maroc | London | A rating |