| B2C2 Ltd | London | A rating |
| B3 SA Brasil Bolsa Balcao UK Ltd | London | A rating |
| Babcock & Wilcox Volund Limited | London | A rating |
| Babcock Defence & Security Holdings LLP | London | A rating |
| Babcock Integrated Technology Limited | Bristol | A rating |
| Babcock International Limited | London | A rating |
| Babcock Training Limited | Cosham | A rating |
| BABY THREADZ LTD | Stock Port | A rating |
| Babylon Park UK Play & Entertainment Ltd | London | A rating |
| Babylon Partners Limited | London | A rating |
| Bacardi Global Brands Ltd | London | A rating |
| Bachy Soletanche Limited | Burscough | A rating |
| Back Market UK Limited | Bristol | A rating |
| Backbase UK Limited | Cardiff | A rating |
| BackOffice Associates Europe (UK) Limited | Farnborough | A rating |
| Badenoch and Clark Limited T/A LHH Recruitment Solutions | London | A rating |
| Badoo Limited | London | A rating |
| BAE Systems Plc | London | A rating |
| BAeHAL Software Limited | SLOUGH | A rating |
| Bagelcode UK LTD | London | A rating |
| Baglioni (UK) Limited | London | A rating |
| Bagot Refractory Limited | Rickmansworth | A rating |
| Baillie Gifford | Edinburgh | A rating |
| BAIN & COMPANY UNITED KINGDOM LLP | LONDON | A rating |
| Bain Capital | London | A rating |
| Bairds Malt Limited | Witham | A rating |
| Baker & McKenzie LLP | London | A rating |
| Baker Botts (UK) LLP | London | A rating |
| Baker Hicks Limited | Warwickshire | A rating |
| Baker Hughes Energy Technology UK Limited | Bristol | A rating |
| Baker Tilly International Limited | London | A rating |
| BakerRisk Europe Limited | Chester | A rating |
| Bakkafrost Scotland Limited | Edinburgh | A rating |
| Bakkavor (London) Limited | Lincolnshire | A rating |
| Balbec Capital Limited | London | A rating |
| Balfour Beatty Group Employment Limited | London | A rating |
| Ball Beverage Packaging Europe Limited | Luton | A rating |
| Balyasny Asset Management (UK) LLP | London | A rating |
| BAM Construct & Ventures UK Ltd | Hemel Hempstead | A rating |
| BAM Nuttall Limited | Farnborough | A rating |
| Bamboo Rose Ltd | Belfast | A rating |
| Bamford Collection Limited | Moreton-In-Marsh | A rating |
| Banco Bilbao Vizcaya Argentaria S.A. | London | A rating |
| Banco de Sabadell S.A. | London | A rating |
| BANCO DO BRASIL SA | LONDON | A rating |
| Banco Santander SA, London Branch | London | A rating |
| Bancosta (UK) Ltd | London | A rating |
| Bandai Namco Amusement Europe Limited | Surrey | A rating |
| Bandai Namco Entertainment UK Ltd. | Richmond | A rating |
| Bandai Namco Holdings UK Limited | Surrey | A rating |
| Bandai UK Limited | Richmond | A rating |
| Bandhan Technologies Limited | London | A rating |
| Bangkok Bank Public Company Ltd | London | A rating |
| Banijay Services Limited | London | A rating |
| Bank Indonesia | London | A rating |
| Bank Mandiri (Europe) Limited | London | A rating |
| Bank of Africa United Kingdom PLC | London | A rating |
| Bank of America, N.A. | London | A rating |
| BANK OF BARODA | LONDON | A rating |
| Bank of Baroda (UK) Ltd | London | A rating |
| Bank of Beirut (UK) Ltd | London | A rating |
| BANK OF CEYLON(UK) LTD | LONDON | A rating |
| Bank of China (UK) Limited | London | A rating |
| BANK OF CHINA INTERNATIONAL (UK) LIMITED | LONDON | A rating |
| Bank of Communications Co., Limited London Branch | London | A rating |
| Bank of East Asia Limited | London | A rating |
| Bank of India | London | A rating |
| Bank of Japan | London | A rating |
| Bank Of Montreal | London | A rating |
| Bank of New York Mellon | London | A rating |
| Bank of Singapore Limited, UK Branch | London | A rating |
| Bank of Taiwan | London | A rating |
| Bank of the Philippine Islands (Europe) Plc | London | A rating |
| Bank Saderat Plc | London | A rating |
| Bank Sepah International PLC | London | A rating |
| Banking Circle | London | A rating |
| Banque Chaabi Du Maroc | London | A rating |
| Barclays Bank PLC | London | A rating |
| Barclays Bank UK PLC | London | A rating |
| Barclays Execution Services Limited | London | A rating |
| Bard Limited | Crawley | A rating |
| Barilla Acceleration Limited | London | A rating |
| Baringa Partners LLP | London | A rating |
| Barings (U.K.) Limited | London | A rating |
| Barjane International Group Limited | London | A rating |
| BARLOWORLD UK LIMITED | Maidenhead | A rating |
| Barracuda Networks Limited | Nottingham | A rating |
| BARRICK GOLD (LONDON) LTD | LONDON | A rating |
| Barrier Architectural Services Limited | Teesside | A rating |
| Barrows Connected Store UK Limited | Orpington | A rating |
| Barry Callebaut Manufacturing (UK) Limited | Banbury | A rating |
| Barry's Bootcamp Ltd | London | A rating |
| BARSAN GLOBAL LOGISTICS LTD | COVENTRY | A rating |
| BASEEL LIMITED | London | A rating |
| BASF Metals ltd | London | A rating |
| BASF Plc | Stockport | A rating |
| BASILDON CHEMICAL CO. LIMITED | Abingdon | A rating |
| Basilic Fly Studio UK Private Limited | London | A rating |
| Basis Technology Limited | Beaconsfield | A rating |
| Basu Associates Limited | York | A rating |
| Basware Holdings Ltd | London | A rating |
| Bauer Radio Limited | Peterborough | A rating |
| Bauer Technologies Limited | Bishops Stortford | A rating |
| Baufritz (UK) Ltd | Cambridge | A rating |
| BAUMONT REAL ESTATE CAPITAL LIMITED | LONDON | A rating |
| Bausch & Lomb UK Limited | Kingston Upon Thames | A rating |
| BAWAG P.S.K. INTERNATIONAL | London | A rating |
| Baxter Healthcare Limited | Reading | A rating |
| Baya Systems Limited | Cambridge | A rating |
| Bayer plc | Reading | A rating |
| Bayerische Landesbank | London | A rating |
| Bayview International UK Ltd | London | A rating |
| BayWa R.E. UK Limited | Edinburgh | A rating |
| Baywater Healthcare Limited | Crewe | A rating |
| Bazaarvoice Limited | London | A rating |
| BB (UK) Limited | Watford | A rating |
| BB Securities Ltd | London | A rating |
| BB&R Limited | London | A rating |
| BBD Software Limited | London | A rating |
| BBH Partners LLP | London | A rating |
| BBI Resources Limited | Crumlin | A rating |
| BC London Lions Limited | London | A rating |
| BCDH Capital Holding (UK) Limited | London | A rating |
| BCE Partners UK Ltd | London | A rating |
| BCEGI Construction (UK) Ltd | Manchester | A rating |
| BCG Digital Ventures | London | A rating |
| BCG Global Specialty Businesses | London | A rating |
| bChannels Ltd | London | A rating |
| BCI UK IRR Limited | London | A rating |
| BCM Limited | Nottingham | A rating |
| BCP Securities UK Ltd | London | A rating |
| BD UK Ltd | Wokingham | A rating |
| BDM Ads Ltd | LONDON | A rating |
| BDO LLP | London | A rating |
| BDP Management Services Ltd | London | A rating |
| BDT & MSD Partners International, LLP | London | A rating |
| Be Kind Studios ltd | New Malden | A rating |
| Be Shaping the Future Management Consulting Ltd | London | A rating |
| Beacon Legal Recruitment (UK) Limited | London | A rating |
| Beacon Platform Limited | London | A rating |
| Beacon Rail Leasing Limited | London | A rating |
| Beads London Ltd | London | A rating |
| BEAM SUNTORY UK LTD. | London | A rating |
| BearingPoint Limited | London | A rating |
| Beautiful Tracking Limited | London | A rating |
| Beauty Pie Ltd | London | A rating |
| BEAZLEY MANAGEMENT LIMITED | London | A rating |
| Bechtel Limited | London | A rating |
| Beck & Pollitzer Engineering Limited | Burton | A rating |
| Bedford Consultancy Services Limited | London | A rating |
| Bee World UK Limited T/A Jollibee | London | A rating |
| Beeline.com Limited | London | A rating |
| Beggars Group Limited | London | A rating |
| Behaviour Interactive UK Limited | Middlesbrough | A rating |
| Beiersdorf UK Ltd | Birmingham | A rating |
| BeijingWest Industries UK Ltd | Luton | A rating |
| beIN IP Limited | London | A rating |
| Beko plc | Watford | A rating |
| Bel UK Limited | Sevenoaks | A rating |
| BEL Valves Ltd. | NEWCASTLE UPON TYNE | A rating |
| Belavia Belarusian Airlines | London | A rating |
| Belcan International Ltd | Derby | A rating |
| Belden UK Limited | Manchester | A rating |
| BELECTRIC SOLAR LTD | Brinkworth | A rating |
| Belfor UK Limited | Tamworth | A rating |
| Believe Direct Limited | London | A rating |
| Belkin Limited | Rushden | A rating |
| Bell Equipment Ltd | Burton-on-Trent | A rating |
| Belmond (UK) Limited | London | A rating |
| Belron International Limited | Egham | A rating |
| Belstaff International Limited | London | A rating |
| BeMo Tunnelling UK Ltd | London | A rating |
| Ben Nevis Distillery ( Fort William) Limited | Fort William | A rating |
| Bending Spoons Operations S.P.A.(UK Branch) | London | A rating |
| Benefit Cosmetics Limited | Chelmsford | A rating |
| BENIFY UK LIMITED | London | A rating |
| Benoy Limited | Nottinghamshire | A rating |
| Bensussen Deutsch & Associates Limited | London | A rating |
| BentallGreenOak Advisors (UK) LLP | London | A rating |
| Benteler Automotive UK Ltd | Corby | A rating |
| Bentley Motors Limited | Crewe | A rating |
| Bentley Systems (UK) Ltd | London | A rating |
| Beone Medicines UK Ltd | London | A rating |
| Bergenbio Ltd | Oxford | A rating |
| Bericap UK Limited | Hull | A rating |
| Berkeley Financial Holdings Limited | London | A rating |
| Berkeley Research Group (UK) Limited | London | A rating |
| Berkshire Global Advisors Ltd | London | A rating |
| Berlin Brands Group UK Ltd | Witney | A rating |
| Bernstein Autonomous LLP | London | A rating |
| Berry Palmer & Lyle Limited | London | A rating |
| BerryWorld Ltd | Cheshunt | A rating |
| Besins Healthcare (UK) Limited | London | A rating |
| Bespak Limited | Crewe | A rating |
| Bespoke Careers Management Limited | London | A rating |
| Bestpac UK Ltd | Blackburn | A rating |
| Bestseller Wholesale UK Ltd | London | A rating |
| Beta CAE Systems UK Limited | St Albans | A rating |
| Beta Research Ltd. | Burton-on-Trent | A rating |
| Betfair Limited | London | A rating |