| Blue Tees Golf Ltd | London | 2026 |
| Blue Tongue Projects Ltd. | Dorchester | 2019 |
| Blue Wave Boat and Marine Ltd | Enniskillen | 2023 |
| Blue Wave Maritime Limited | Abergavenny | 2010 |
| Blue Weave Welds Ltd | Keighley | 2017 |
| Blue Whale Technologies Co. Ltd | Kingston Upon Thames | 2019 |
| Blue Whistling Duck Ltd | Derby | 2016 |
| Blue Willow Tree Limited | Templeborough Rotherham | 2004 |
| Blue Wing Wood Industry Limited | London | 2025 |
| Blue Wings Marine Service Co., Ltd | Cambridge | 2023 |
| Blue Wire Electrical (NW) Ltd | Thornton-Cleveleys | 2013 |
| Blue Wolf Empire Ltd | Sheffield | 2020 |
| Blue Wolf Ltd | Croydon | 2015 |
| Blue Yeti Scenic Carpentry Ltd | Chertsey | 2025 |
| Blue Yonder Controls Limited | Gloucester | 2015 |
| Blue Zinc Group Ltd | Oswestry | 2022 |
| Blue Zulu Golf Ltd | Kilmarnock | 2019 |
| Blue-Gray Limited | Newick | 1998 |
| Blueaura Premium Spring Water Ltd | Welling | 2025 |
| Bluebadger Foods Ltd | Hitchin | 2024 |
| Blueball Brewery Ltd | Runcorn | 2011 |
| Bluebat Limited | Leicester | 2014 |
| Bluebay Technical Limited | Liverpool | 2014 |
| Bluebean Software Ltd | Wincanton | 2012 |
| Bluebell Communications Systems Limited | Exeter | 2010 |
| Bluebell Dairy Limited | Derby | 2007 |
| Bluebell Distribution Ltd | Sevenoaks | 2026 |
| Bluebell Fitted Furniture Limited | Warrington | 2011 |
| Bluebell GIN Limited | Rossendale | 2019 |
| Bluebell Hill Engineering (Aylesford) Limited | Braintree | 1969 |
| Bluebell Industries Limited | Alfreton | 1997 |
| Bluebell Opticom Ltd | Bourne End | 2003 |
| Bluebell Realisations One Limited | Alfreton | 1973 |
| Bluebell Technology Ltd | Daventry | 2005 |
| Bluebell Trading UK Limited | Holmfirth | 2005 |
| Bluebell Vineyard Estates Limited | Pinner | 1982 |
| Bluebells and Butterflies Crafts Limited | Willenhall | 2021 |
| Bluebells Pottery Limited | Bolton | 2012 |
| Blueberry Designs (Cheshire) Ltd | Altrincham | 2020 |
| Blueberry Hill Design Ltd | South Molton | 2023 |
| Blueberry Hill Meals Limited | Stirling | 2016 |
| Blueberry Moon Studio Ltd. | Omagh | 2021 |
| Blueberry Partners Limited | Congleton | 2010 |
| Bluebird Advertising Co., Limited | Beckenham | 2023 |
| Bluebird Aero Ltd | Barry | 2025 |
| Bluebird Aviation Engineering Ltd | Bath | 2023 |
| Bluebird Bakery Ltd | York | 2015 |
| Bluebird Caravans Limited | Sheffield | 1998 |
| Bluebird Chain & Findings Limited | Crawley | 1991 |
| Bluebird Creative Limited | Glasgow | 2011 |
| Bluebird Fixings Limited | Lincoln | 1988 |
| Bluebird Graphics Limited | Axminster | 2000 |
| Bluebird Print Ltd | Chesterfield | 2019 |
| Bluebird Refrigeration & Air Conditioning Limited | Skelmersdale | 2011 |
| Bluebird Technologies Limited | Long Ashton | 1999 |
| Bluebird Vehicles Limited | Leeds | 2003 |
| Bluebottle Limited | Buckinghamshire | 2003 |
| Bluebox Optics Limited | Swansea | 2017 |
| Bluebridges Sugar Confectionery Ltd | Nottingham | 2022 |
| BLUEBUBBLE123 Limited | Clitheroe | 2012 |
| Bluecape Global Ltd | Kington | 2026 |
| Bluecastle Catering Ltd | London | 2018 |
| Bluechilli Design & Print Limited | Birmingham | 2009 |
| Bluechip CNC Limited | Bromsgrove | 2009 |
| Bluecoat Engineering Limited | Beckenham | 2011 |
| Bluecode Labelling Technology Limited | Rugby | 1998 |
| Bluecore Heatsinks Limited | Birmingham | 2008 |
| Bluecrest Freebooter Limited | Liverpool | 1977 |
| Bluecrow Team Ltd | St. Ives | 2021 |
| Bluecrystalglass Limited | Epping | 2019 |
| Bluedale Enterprises Limited | Mansfield | 2020 |
| Bluedell Limited | Rowley Regis | 2006 |
| Bluedop Medical Ltd | London | 2014 |
| Bluedot Display Limited | Godalming | 2000 |
| Blueeva Aviation Ltd | Spalding | 2025 |
| Bluefield Houseboats Ltd | Belfast | 2009 |
| Bluefin Living Ltd | Newport | 2015 |
| Bluefix Energy Services Ltd | London | 2026 |
| Blueflow Heating Limited | Cannock | 2024 |
| Bluefly Engineering Limited | Sutton | 2019 |
| Blueford Beef Company Limited | Dursley | 2020 |
| Bluefrog Design Limited | Market Harborough | 2003 |
| Bluegene Technologies Ltd | London | 2015 |
| Blueglue Ltd | London | 2025 |
| Bluegrassdesign Limited | South Shields | 2015 |
| Bluegreyex Ltd | London | 2022 |
| Bluehaven Supply Ltd | West Midlands, England | 2026 |
| Bluehull Marine Engineering Ltd | Cardiff | 2025 |
| BLUEJ24 Ltd | Harrogate | 2011 |
| Blueking Holdings Limited | Reading | 2018 |
| Bluekit Medical Limited | Redhill | 2012 |
| Bluelight Electrical Solutions Ltd | Nottingham | 2020 |
| Blueline AI Ltd | Glasgow | 2025 |
| Bluelite Graphics Limited | Burgess Hill | 1997 |
| Bluemay Limited | Melksham | 1973 |
| Bluemay Weston Limited | Melksham | 1999 |
| Bluemet Labels Ltd | Barnsley | 2017 |
| Bluemet Ltd | Barnsley | 2023 |
| Bluemet Technology Ltd | Barnsley | 2023 |
| Bluepig Energy Ltd | Thirsk | 2025 |