| Bluepoint Corporation Limited | Milton Keynes | 1992 |
| Bluepoint Marine Services Limited | Liverpool | 2010 |
| Blueprint and Design Limited | Beckenham | 2002 |
| Blueprint Apparel (International) Ltd | Leeds | 2024 |
| Blueprint Construction, Modelmaking and Design Ltd. | Wallsend | 2014 |
| Blueprint Custom Clothing Limited | Hailsham | 2001 |
| Blueprint Design and Graphics Limited | Stourbridge | 2006 |
| Blueprint Design Engineering Limited | Ulverston | 2006 |
| Blueprint Document Solutions Limited | Louth | 2010 |
| Blueprint Engineering Limited | Chelmsford | 2006 |
| Blueprint Fitted Furniture Limited | Wokingham | 2014 |
| Blueprint GB Limited | Stockport | 2003 |
| Blueprint Imaging Limited | Witney | 2002 |
| Blueprint Kitchens Limited | Falmouth | 2016 |
| Blueprint Leisure Limited | Hailsham | 1989 |
| Blueprint Medicines (UK) Ltd. | London | 2019 |
| Blueprint Premier Limited | Nottingham | 2008 |
| Blueprint Publications Limited | Spital Road Maldon | 1988 |
| Blueprint Services Ltd | Birmingham | 2000 |
| Blueprint Woodworking Ltd | Bideford | 2024 |
| Blueprinted Visions Limited | Bromley | 2025 |
| Blueprints 3D Ltd | Oxford | 2024 |
| Blueprints Worldwide Ltd | Perth | 2018 |
| Bluerock Automation Ltd | Llandudno | 2014 |
| Blues Group (Holdings) Limited | Maldon | 2013 |
| Blues K Technology Co., Ltd | Cardiff | 2021 |
| Blueseng Limited | Hull | 2009 |
| Blueshade Limited | London | 1991 |
| Blueshift International Materials (UK) Limited | Edinburgh | 2015 |
| Bluesky Group International Limited | London | 2025 |
| Bluesky Helicopter Maintenance Ltd | Mold | 2018 |
| Bluesky Purify Water Ltd | Leicester | 2025 |
| Bluesky Tools Co., Ltd | Gillingham | 2019 |
| Bluesky Windows Services Ltd | West Bromwich | 2025 |
| Bluesona Limited | Belfast | 2017 |
| Bluespark Automotive Ltd | Houghton Le Spring | 2011 |
| Bluespot Direct Ltd | Leicester | 2015 |
| Bluesquare Repair Services Limited | Reading | 2011 |
| Bluesquareclub Ltd | Mildenhall | 2025 |
| Bluestar Manufacturing Ltd | Keele | 2024 |
| Bluestar Polyurethane Mouldings Ltd | Keele | 2023 |
| Bluestar Print Finishers Limited | Harlow | 2006 |
| Bluestar Products Ltd | Manchester | 2016 |
| Bluesteel Engineering Ltd | Dungannon | 2011 |
| Bluestone Aerospace Ltd | Whitstable | 2022 |
| Bluestone Aviation Limited | Salisbury | 2025 |
| Bluestone Brewing Company Limited | Newport | 2013 |
| Bluestone Chemicals Limited | Clwyd. | 1992 |
| Bluestone City Limited | Swindon | 1996 |
| Bluestone Composites Limited | Pembroke | 2024 |
| Bluestone Hemingway Ltd | Reading | 2026 |
| Bluestone Marketing Limited | Loughborough | 2004 |
| Bluestone Property Investments Limited | Pickering | 2003 |
| Bluestone Recycling Limited | Halstead | 2009 |
| Bluestone Technology Limited | Devon | 2002 |
| Bluestone Welding & Fabrication Limited | Narberth | 2023 |
| Bluesun Pv.Ph Co., Ltd | Manchester | 2024 |
| Bluesweets Limited | Bridgend | 2008 |
| Bluetech Systems International Ltd | Ivybridge | 2016 |
| Bluethumb Ltd | Dunfermline | 2019 |
| Blueton Limited | Glasgow | 2005 |
| Bluetor Limited | Middlesex | 2006 |
| Bluetouch Communications Limited | London | 2001 |
| Bluetree Boat Builders Ltd | Lyme Regis | 2023 |
| Bluetree Print Limited | Rotherham | 2021 |
| Bluetrolley.Com Limited | Cardiff | 2013 |
| Bluett & Co. Limited | Ilford | 1958 |
| Bluevolt Electrical and Renewables Limited | Fareham | 2026 |
| Bluewarp Limited | Salford | 2021 |
| Bluewater BIO Holdings Limited | London | 2014 |
| Bluewater BIO Limited | London | 2007 |
| Bluewater Boats Limited | Leamington Spa | 2002 |
| Bluewater Marine ( North Wales) Ltd | Pwllheli | 2012 |
| Bluewater Marine Limited | Reading | 2025 |
| Bluewave Innovation Group Ltd | Sittingbourne | 2025 |
| Blueway Associates Limited | Manchester | 2002 |
| Bluewedge Ltd | Holywood | 2025 |
| Bluewhalestudio Ltd | Norwich | 2021 |
| Bluewire International Ltd | Ilford | 2014 |
| Bluezon Limited | Carlisle | 2008 |
| Blufin Limited | Lancashire | 2004 |
| Bluindium Ltd | London | 2023 |
| Blum UK | Milton Keynes | 1987 |
| Blum-Novotest Ltd. | Burton-On-Trent | 1999 |
| Blumax Metal Finishers Limited. | Nottinghamshire | 2001 |
| Blumiere Cosmetics Ltd | Crofton | 2025 |
| Blumotiv Limited | Woodford Green | 2024 |
| Blundell Harling Limited | Weymouth | 1948 |
| Blundell Production Equipment Limited | Coventry | 1968 |
| Blunomics Ltd | London | 2025 |
| Blunt Composites Ltd | Belper | 2017 |
| Blunt Soar Limited | Loughborough | 2018 |
| Bluntray (Engineers) Ltd | Radlett | 2014 |
| Bluntrock Brewery Ltd | Bodmin | 2019 |
| Bluprint (UK) Limited | London | 2003 |
| Bluprint Artist Ltd | Bristol | 2013 |
| Bluprint Express Logistics Limited | London | 2025 |
| BLUPRINTS3D Ltd | Heanor | 2024 |
| Blurum Entertainment Ltd | London | 2023 |
| Bluseal Limited | Worcester | 2004 |