| Bryany Aston Limited | Brackley | 2004 |
| Bryce Amps Limited | Bangor | 2007 |
| Bryce Aviation Ltd | Ayr | 2025 |
| Bryce of Scotland (Fencing) Limited | Kelso | 1986 |
| Brycla Limited | Wantage | 2010 |
| Bryden Precision Engineering Ltd | Bolton | 2024 |
| Brydian Smart Cards Limited | Orpington | 2018 |
| Brygold Limited | Derby | 2025 |
| Bryher (Mouldings) Limited | Falmouth | 1978 |
| Bryher Boatyard Limited | Isles Of Scilly | 2011 |
| Bryken Limited | Liverpool | 1982 |
| Brylloyd Interiors Limited | Carterton | 2026 |
| Brymor Limited | Ripon | 2015 |
| Bryn Farm Engineering Limited | Swansea | 2012 |
| Bryn Roberts Workshops Limited | Wrexham | 1993 |
| Bryn Rock Records Ltd | Denbigh | 2019 |
| Brynkir Woollen Mill Limited | Garn Dolbenmaen | 1969 |
| Brynleigh Technology Limited | Basildon | 1992 |
| Brynol Chrome Limited | Pyle | 2004 |
| Brynsway Ltd | Coventry | 2026 |
| Bryntech Limited | Rushden | 2008 |
| Brynwood Holdings Limited | Brynmemyn | 1982 |
| Brynymor Digital Ltd | Swansea | 2003 |
| Brynymor Mailbox Limited | Swansea | 2015 |
| Bryony Attwood Ltd | Somerton | 2023 |
| Bryony Designs Limited | Northallerton | 2015 |
| Bryony Signs Limited | Pontefract | 2014 |
| Bryony's Botanicals Ltd | Hexham | 2024 |
| Brysdales Intralogistics Ltd | Chorley | 2003 |
| Brysdales Ltd | Chorley | 1971 |
| Bryse Consulting Ltd | Salford | 2024 |
| Bryson Tractors Limited | Lanarkshire | 2002 |
| Brytallium Limited | Blackpool | 1968 |
| Bryte Coffee Limited | St. Andrews | 2024 |
| Bryte Digital and Screen Limited | Gateshead | 2013 |
| Brython Ltd | Burrington | 2018 |
| Brython Tecwyn CYF | Porthmadog | 2011 |
| Brythonic Yachts Limited | Brecon | 2020 |
| Brytin Ltd | Bath | 2023 |
| Brytone Limited | Rotherham | 2004 |
| Bryzan Worldwide Limited | Reigate | 2015 |
| Brzn Ltd | Worthing | 2019 |
| Brzozowski Ltd | Auchterarder | 2023 |
| Brzrk Limited | Southampton | 2024 |
| Bríd's Cross Brewing Ltd | Penryn | 2022 |
| BS Aero (ENG) Ltd | Wimborne | 2026 |
| BS Aero Ltd | Carrickfergus | 2025 |
| BS Aero Servicing Ltd | Porthcawl | 2025 |
| BS British Drain Ltd | London | 2022 |
| BS Computer & Telephones Ltd | Cardiff | 2022 |
| BS Elastomers Ltd | Tewkesbury | 2012 |
| BS Fabrications (UK) Ltd | Scarborough | 2014 |
| BS Fabrications Limited | Darlington | 1991 |
| BS Gtbb Ltd | Bromley | 2025 |
| BS IP & Knowhow Ltd | Leeds | 2011 |
| BS Lift Services Ltd | Bexley | 2021 |
| BS Lion Ltd | Pudsey | 2020 |
| BS Machinery Installation Ltd | Doncaster | 2025 |
| BS Patterns Limited | Newcastle | 2019 |
| BS Surgical Instruments Ltd | Wolverhampton | 2023 |
| BS Suthi and Bros Limited | Coventry | 2016 |
| BS Tiling Limited | London | 2026 |
| BS27 Sauna Build Limited | Cheddar | 2026 |
| BS5 Beyond Games Ltd | Bristol | 2023 |
| BS73 Limited | Weymouth | 2026 |
| BSA Aviation Ltd | Telford | 2026 |
| BSA Guns (UK) Limited | Birmingham | 1986 |
| BSA Home Improvement Limited | Glasgow | 2023 |
| BSA Products Limited | King'S Lynn | 2012 |
| BSA Rational Automation Limited | Southampton | 1957 |
| BSA Regal Engineering Limited | Southampton | 1991 |
| BSA Sport Ltd | Bromley | 2018 |
| BSA Tools and Services Ltd | Birmingham | 2026 |
| BSA Tools Limited | Birmingham | 1996 |
| BSA Tube Runner Limited | Southampton | 1980 |
| Bsam Kiesse Ltd | Manchester | 2025 |
| BSB Maintenance Services Limited | Grimsby | 2025 |
| BSB Print Ltd | Rotherham | 2021 |
| BSB Products Limited | Reigate | 2012 |
| BSB Progeny Ltd | Manchester | 2023 |
| BSB Realisations Limited | Manchester | 2023 |
| BSB Refrigeration Ltd | Immingham | 2023 |
| BSB Rollers Ltd | Stockport | 2010 |
| BSB Roofing Supplies Ltd | Stockport | 2007 |
| BSB Structural Ltd. | Motherwell | 2004 |
| Bsboards Limited | Southampton | 2003 |
| BSC Contracts Ltd | Harlow | 2013 |
| BSC Diecasting & Finishing Ltd | Walsall | 2015 |
| BSC Distribution Ltd | Abergele | 2013 |
| BSC Filters Limited | York | 1989 |
| BSC Power Engineering Ltd | Andover | 2022 |
| BSC Print Limited | London | 1972 |
| BSC Signs Ltd | Warrington | 2020 |
| BSC Tools Limited | Caerphilly | 2021 |
| BSC Ventures Ltd | Bolton | 2025 |
| BSD (UK) Ltd | Gateshead | 2002 |
| BSD Cool Ltd | London | 2021 |
| BSE Controls Limited | Haywards Heath | 2024 |
| BSE Integrated Research & Development Limited | Leighton Buzzard | 2024 |
| Bsec Ltd | London | 2017 |