| Brady Technologies Limited | London | A rating |
| Bragg Gaming Group - Group Services Ltd | London | A rating |
| Brain Labs Digital Ltd | London | A rating |
| BRAINSTATION LEARNING LIMITED | London | A rating |
| BRAINTREE LIMITED | Kent | A rating |
| Brambles Holdings (UK) Limited | Weybridge | A rating |
| Branch Metrics UK Ltd | London | A rating |
| Brand Evangelists For Beauty Ltd | Nottingham | A rating |
| Brand Power Limited | London | A rating |
| Brands DirectLimited | Colchester | A rating |
| Brandscapes Worldwide Consultancy Services Ltd | London | A rating |
| Brave Software Europe Ltd | London | A rating |
| Bravura Solutions (UK) Limited | London | A rating |
| Braze Limited | London | A rating |
| BRC Imagination Arts Ltd | Leigh | A rating |
| Bregal Investments LLP | London | A rating |
| Breton UK Machinery and Services Limited | Cambridge | A rating |
| BREVAN HOWARD ASSET MANAGEMENT SERVICES LIMITED | LONDON | A rating |
| Brewer Science Limited | Derby | A rating |
| BRF FOODS UK LTD | Altrincham | A rating |
| Bricz Supply Chain Ltd | Preston | A rating |
| BRIDGE REAL ESTATE INVESTMENTS GROUP LTD | London | A rating |
| Bridge UK, Limited | London | A rating |
| BRIDGEBIO UK LIMITED | London | A rating |
| Bridgepoint Advisers Limited | London | A rating |
| Bridges Fund Management Limited | London | A rating |
| Bridgestone Europe NV/SA, UK Branch | Warwick | A rating |
| Bridgnorth Aluminium Ltd | Bridgnorth | A rating |
| BRIDON International Ltd | Doncaster | A rating |
| Bridor UK Limited | Camberley | A rating |
| BRIGAD LTD | LONDON | A rating |
| Brigade Capital UK LLP | London | A rating |
| Briggs of Burton Limited | Burton on Trent | A rating |
| Brigham Young University Limited | London | A rating |
| BRIGHT COURTYARD LONDON LIMITED | London | A rating |
| Bright Horizons Family Solutions | Northampton | A rating |
| BRIGHTCOVE UK LIMITED | London | A rating |
| Brightedge Technologies Limited | London | A rating |
| Brighter Green Engineering | High Wycombe | A rating |
| Brighton Park Capital UK Limited | London | A rating |
| Brightstar Lottery UK Solutions Limited | London | A rating |
| Brightsun Travel UK Ltd | Hounslow | A rating |
| BrightTALK Ltd | London | A rating |
| BRILLIANT IN EXCELLENCE (UK) LIMITED | Silverstone | A rating |
| Brillio Technologies Private Limited | London | A rating |
| BRILLIO UK LIMITED | London | A rating |
| Brineflow Ltd | GREAT YARMOUTH | A rating |
| Brink's Global Services Limited | Feltham | A rating |
| Brioche Pasquier UK | Milton Keynes | A rating |
| Bristol Laboratories Limited | Berkhamstead | A rating |
| Bristol Uniforms | Yate | A rating |
| Bristol-Myers Squibb Pharmaceuticals Limited | Denham | A rating |
| Bristow Helicopters Ltd | Dyce | A rating |
| Brit Group Services Limited | London | A rating |
| Brita Water Filter Systems Limited | Bicester | A rating |
| Britannia Financial Group Limited | London | A rating |
| Britannia Global Investments Limited | London | A rating |
| Britannia Refined Metals Limited | Northfleet | A rating |
| Britdeals Limited | Warrington | A rating |
| British Airways PLC | Harmondsworth | A rating |
| British American Tobacco Plc | London | A rating |
| British Arab Commercial Bank Limited | London | A rating |
| British Broadcasting Corporation | Birmingham | A rating |
| British Council | London | A rating |
| British International Investment plc | London | A rating |
| British Standards Institution | London | A rating |
| British Steel Limited | Scunthorpe | A rating |
| British Sugar UK & Ireland | Peterborough | A rating |
| British Tourist Authority | Birmingham | A rating |
| Britvic Soft Drinks Ltd | Hemel Hempstead | A rating |
| Broadcom Europe Limited | Cambridge | A rating |
| Broadridge Financial Solutions Ltd | London | A rating |
| Broadway Malyan Holdings Limited | London | A rating |
| Brock Solutions UK Limited | Reading | A rating |
| Brocklesby Limited | Brough | A rating |
| Broetje-Automation UK Ltd | Sandycroft | A rating |
| BROOKFIELD ASSET MANAGER (UK) HOLDCO LIMITED | London | A rating |
| Brookfield Global Asset Management Limited | London | A rating |
| Brose Ltd | Coventry | A rating |
| Brother International Europe LTD | Manchester | A rating |
| Brown & Brown (Europe) Limited | London | A rating |
| Brown Advisory Limited | London | A rating |
| Brown Brothers Harriman Investor Services Limited | LONDON | A rating |
| Brown Rudnick LLP | London | A rating |
| Brown-Forman Beverages, Europe, Limited | London | A rating |
| Browns (South Molton Street) Limited | London | A rating |
| BrowserStack UK Ltd | London | A rating |
| Bruichladdich Distillery Company Limited | Glasgow | A rating |
| Brunel International UK Limited | Manchester | A rating |
| Brunswick Consultants LTD | London | A rating |
| Brush Group Limited | Loughborough | A rating |
| Bryan Cave Leighton Paisner LLP | London | A rating |
| BRYTER Services UK Limited | Holborn | A rating |
| BSBL UK Limited | London | A rating |
| BSH Home Appliances Ltd | Wolverton | A rating |
| BSW Timber Ltd | Earlston | A rating |
| BT Group | London | A rating |
| BTG Pactual (UK) Limited | London | A rating |
| BTIG Limited | London | A rating |
| BTS in London Limited | London | A rating |
| BTVK Advisory LLP | London | A rating |
| Bucci Industries UK Limited | London | A rating |
| Buchan Offshore Wind Limited | Glasgow | A rating |
| Bucherer UK Limited | London | A rating |
| Budgy Smuggler UK Ltd | London | A rating |
| Budri London Limited | London | A rating |
| Buffer London Limited | London | A rating |
| Buhler UK Limited | London | A rating |
| BUI LTD | DERBY | A rating |
| BUILDING DESIGN PARTNERSHIP LIMITED t/a BDP Ltd | London | A rating |
| Built Fitout and Refurbishment Limited | London | A rating |
| Bullhorn International, Limited | LONDON | A rating |
| Bullish UK Services Ltd | London | A rating |
| Bumi Armada UK Ltd | Aberdeen | A rating |
| BUNZL PLC | London | A rating |
| Bupa | London | A rating |
| Bupa Care Services | Leeds | A rating |
| Bupa Cromwell Hospital | London | A rating |
| Bupa Occupational Health Limited | London | A rating |
| Burberry Limited | London | A rating |
| Burda Principal Investments Limited | London | A rating |
| Bureau Veritas UK Ltd | Birmingham | A rating |
| Burns & McDonnell Europe (UK) Limited | Birmingham | A rating |
| Burns & Wilcox Global Solutions Ltd | London | A rating |
| Buro Happold Engineers Limited | Bath | A rating |
| Burson Group Limited | London | A rating |
| Burt Boulton & Haywood Limited | Newport | A rating |
| Business & Human Rights Resource Centre | London | A rating |
| Business Centric Services Group Ltd | London | A rating |
| Business Connexion Limited | Stevenage | A rating |
| BUSINESS INSIDER EUROPE LIMITED | London | A rating |
| Business Modelling Associates UK Ltd. | Chester | A rating |
| BUSINESS SWEDEN | London | A rating |
| Business Sweden Business Support Office UK branch | London | A rating |
| Business Talent Group Europe Ltd | London | A rating |
| Busuu Limited | London | A rating |
| BUX Financial Services Limited | London | A rating |
| BuyingTeam Limited T/A Proxima | London | A rating |
| BuzzFeed UK Limited | London | A rating |
| Bvlgari (UK) Ltd | London | A rating |
| BVN UK Architecture Ltd | London | A rating |
| BVP UK & Europe Investors Limited | London | A rating |
| BW CDMO HOLDINGS UK LIMITED | London | A rating |
| BW Flexible Systems UK Limited | Beeston | A rating |
| BW Offshore (UK) Limited | Aberdeen | A rating |
| BWAM UK Limited | London | A rating |
| BWB Consulting Ltd | Nottingham | A rating |
| BWS International Limited | Northampton | A rating |
| BWSC Generation Services UK Ltd | Sleaford | A rating |
| Byblos Bank Europe SA | LONDON | A rating |
| BYD (U.K.) CO.,LTD | Uxbridge | A rating |
| BYK Additives Ltd | Widnes | A rating |
| Bynder Limited | London | A rating |
| Byrom plc | Cheadle | A rating |
| Bystronic UK Ltd | Coventry | A rating |
| Bytes Software Services Limited | Leatherhead | A rating |
| C & C Reservoirs Limited | Reading | A rating |
| C & W (U.K.) LLP | London | A rating |
| C-MART SOLUTIONS LIMITED | London | A rating |
| C. & J. Clark International Limited | Street | A rating |
| C.H. Robinson Worldwide (UK) Limited | Slough | A rating |
| C.K. Crane (International) Limited | Burton-On-Trent | A rating |
| C2FO Ltd | London | A rating |
| C40 Cities Climate Leadership UK | London | A rating |
| CA AUTO FINANCE UK LTD | SLOUGH | A rating |
| CAA ICON UK Limited | London | A rating |
| CAA Sports UK Limited | London | A rating |
| Cabot Carbon Ltd | Sully | A rating |
| Cabot Communications Ltd | Bristol | A rating |
| Cabot Partners Limited | London | A rating |
| Cabot UK Holdco Limited | Kent | A rating |
| CAC EUROPE Ltd | London | A rating |
| CACEIS Bank UK Branch | London | A rating |
| CACI Limited | London | A rating |
| CACTUS COMMUNICATIONS LIMITED | LONDON | A rating |
| Cadence Design Systems Limited | Bracknell | A rating |
| Cadila Pharmaceuticals (Europe) Ltd | Ascot | A rating |
| Cadran Services Limited t/a ICP | London | A rating |
| CADS Ltd | BROADSTONE | A rating |
| Cadwalader, Wickersham & Taft LLP | London | A rating |
| CAE (UK) plc | Burgess Hill | A rating |
| CAE (UK) plc | West Sussex | A rating |
| CAE USA Inc | Bury St. Edmunds | A rating |
| Caesars Trading and Technology Services Limited | Leeds | A rating |
| CAF Rail UK Limited | Belfast | A rating |
| Cafe Royal Management Limited | London | A rating |
| CAFOD | London | A rating |
| Cahill Gordon & Reindel LLP | London | A rating |
| Cainiao UK Supply Chain Limited | Dunstable | A rating |
| CaixaBank SA UK Branch | London | A rating |
| Caldererias Indalicas Sociedad Limitada | Aberdeen | A rating |
| Caldero Holdings Ltd | Leeds | A rating |
| Callaway Golf Europe Ltd | Chessington | A rating |
| Calm.com (GB) Limited | London | A rating |
| Calo Catering Services LTD | London | A rating |
| CALOR GAS LIMITED | Warwick | A rating |
| Calsoft Labs UK Private LTD | London | A rating |
| Calzedonia UK Ltd | LONDON | A rating |
| Cambon Partners Ltd | London | A rating |
| Cambox Ltd | Cambridge | A rating |