| Blue Fire Communications Limited | Worcester | 2009 |
| Blue Gates Hotel Limited | Warley | 2000 |
| Blue Giant (UK) Ltd | Evesham | 2018 |
| Blue Glossy Bay Ltd | London | 2019 |
| Blue Green Yachting Limited | London | 2025 |
| Blue Haven Real Estate Ltd | London | 2025 |
| Blue Heart Clinics Ltd | Dunstable | 2014 |
| Blue Helix Limited | Newbury | 2003 |
| Blue Horizon Investment Partners Ltd | Manchester | 2026 |
| Blue Horizon Marine Ltd | London | 2025 |
| Blue House Design Ltd | Swanley Village | 2009 |
| Blue House Veterinary Centre Limited | Bristol | 2010 |
| Blue Hydrangea Ltd | Edinburgh | 2012 |
| Blue I Technology Limited | Leeds | 2021 |
| Blue II Ltd | London | 2014 |
| Blue Impact International Ltd | London | 2021 |
| Blue Island Limited | Sheffield | 2025 |
| Blue Jack Consultancy Limited | London | 2012 |
| Blue Jaguar 12 Limited | London | 2024 |
| Blue John Gallery Limited | Ashbourne | 2018 |
| Blue Kangaroo Creations Limited | Newcastle Upon Tyne | 2025 |
| Blue Kangaroo Design Holdings Limited | Newcastle Upon Tyne | 2016 |
| Blue Lagoon Heritage Ltd | Bromsgrove | 2010 |
| Blue Lantern Creative Ltd | Doncaster | 2026 |
| Blue Lily Music Ltd | Market Rasen | 2021 |
| Blue Line Canal Carriers Ltd | Towcester | 2012 |
| Blue Liquorice Ltd | Wirral | 2010 |
| Blue Liverpool 1 Limited | London | 2017 |
| Blue Liverpool 2 Limited | London | 2017 |
| Blue Liverpool 3 Limited | London | 2017 |
| Blue Mango Cars Limited | Ilford | 2016 |
| Blue Marble Properties Limited | Worcester | 2015 |
| Blue Marin Ltd | London | 2024 |
| Blue Matrix Limited | Rustington Littlehampton | 2003 |
| Blue Mentality Limited | Weybridge | 2017 |
| Blue Mist Investments Limited | Taunton | 2020 |
| Blue Moon Limited | Broxbourne | 2000 |
| Blue Moon Property Development Limited | Stockport | 2006 |
| Blue Moon Spiritual Well-Being Ltd | High Peak | 2019 |
| Blue Mountain International (UK) Co., Ltd | Beckenham | 2017 |
| Blue Mouse Ltd | London | 2020 |
| Blue Mustard (Truro) Limited | Truro | 2005 |
| Blue Navix Ltd | London | 2025 |
| Blue Neptune Yachting Limited | Blackpool | 2023 |
| Blue Nile Marine Ltd. | Lancashire | 2015 |
| Blue Ocean Apartments Limited | Bodmin | 2015 |
| Blue Ocean Assets Ltd | Hitchin | 2025 |
| Blue Ocean Associates Limited | Weybridge | 2017 |
| Blue Ocean Ship Management Ltd | West Midlands, England, | 2017 |
| Blue Pacific Yachting Ltd | London | 2023 |
| Blue Panda PR Limited | Woking | 2017 |
| Blue Peafowl Solutions Ltd | London | 2017 |
| Blue Pebble Events Limited | Harrogate | 2010 |
| Blue Penguin Television Limited | Marlborough | 2016 |
| Blue Phoenix House Ltd | Newark | 2021 |
| Blue Phoenix Publishing Ltd | Greenhithe | 2023 |
| Blue Point Yachting Ltd | London | 2024 |
| Blue Post Production Company Limited | Burnley | 2018 |
| Blue Print Developer Ltd | London | 2024 |
| Blue Research Limited | Newmarket | 2002 |
| Blue River International Trading Company Limited | Cardiff | 2018 |
| Blue River Life Sciences Ltd | Knutsford | 2024 |
| Blue Rock Invest Limited | Bexhill | 2017 |
| Blue Rose Plumbing and Heating Contractors Ltd | Burnley | 2026 |
| Blue Rune Limited | Winchester | 2023 |
| Blue Sea Star Holding Ltd | London | 2020 |
| Blue Shark Fixings Co., Ltd | Beckenham | 2022 |
| Blue Shield Group Limited | Barnet | 2020 |
| Blue Sireine Productions Limited | London | 2018 |
| Blue Skies Programme Management Limited | Knutsford | 2014 |
| Blue Sky Accounting Services Ltd | South Queensferry | 2015 |
| Blue Sky Coaches Limited | Leeds | 2015 |
| Blue Sky Conversions Ltd | Cambridge | 2014 |
| Blue Sky Drinking Ltd | Market Drayton | 2019 |
| Blue Sky Employee Trustee Limited | Dorset | 2022 |
| Blue Sky Farms Limited | London | 2014 |
| Blue Sky Holdings Limited | Northampton | 2018 |
| Blue Sky Horizons Limited | London | 2006 |
| Blue Sky Leasing Limited | Pershore | 2012 |
| Blue Sky Rentals Limited | Pershore | 2010 |
| Blue Sky Tutoring Ltd | Sherborne | 2018 |
| Blue Skye Investments Ltd | Crewe | 2022 |
| Blue Smoke Properties Ltd | Cardiff | 2020 |
| Blue Spark Consultants Limited | Watford | 2021 |
| Blue Spark Recruitment Limited | Watford | 2021 |
| Blue Sparrow Ltd | South Croydon | 2011 |
| Blue Springs (Matlock) Limited | Leicester | 2000 |
| Blue Square Data MK Limited | Maidenhead | 2009 |
| Blue Square Data Services Limited | Maidenhead | 2009 |
| Blue Star Line Limited | London | 2017 |
| Blue Star Rentals Limited | Newtownabbey | 2011 |
| Blue Stripe Saucer Ltd | Milton Keynes | 2020 |
| Blue Thread Group Limited | London | 2022 |
| Blue Touch Paper Limited | Gerrards Cross | 2007 |
| Blue Transmission Sheringham Shoal (Holdings) Limited | London | 2012 |
| Blue Transmission Sheringham Shoal Limited | London | 2012 |
| Blue Transmission Walney 2 Limited | London | 2011 |
| Blue Treacle Limited | Norwich | 2003 |
| Blue Turbo Group Co., Ltd | Beckenham | 2018 |
| Blue Valley P2 Limited | Perranporth | 2019 |