| Blue Moon Tattoos Ltd | Leighton Buzzard | 2023 |
| Blue Morpho Edinburgh Ltd | Edinburgh | 2019 |
| Blue Mount Property Limited | London | 2013 |
| Blue Mountain Shipping Company Ltd | Luton | 2019 |
| Blue N Green Limited | Birmingham | 2023 |
| Blue Nails and Spa LS2 Ltd | Leeds | 2024 |
| Blue Nails and Spa Ltd | London | 2023 |
| Blue Nails Limited | Enfield | 2021 |
| Blue Oak (Series One) Limited | Southport | 2024 |
| Blue Oak Advisory Limited | Surbiton | 2019 |
| Blue Oak Trading & Investment Limited | Horsham | 2004 |
| Blue Ocean Beauty Ltd | London | 2020 |
| Blue Ocean Group (Scotland) Limited | Glasgow | 2016 |
| Blue Ocean HCW Ltd | Market Harborough | 2018 |
| Blue Ocean IT Hosting Limited | Leigh-On-Sea | 2006 |
| Blue Ocean Kaizen Ltd | Livingston | 2026 |
| Blue Ocean Nails & Spa Pedicure Limited | London | 2025 |
| Blue OLA Ltd | Preston | 2020 |
| Blue Orchids Cleaning Ltd | Shrewsbury | 2018 |
| Blue Oriel Limited | Newcastle | 2025 |
| Blue Parking Ltd | Birmingham | 2026 |
| Blue Pearl DRY Cleaners Limited | Bromley | 2017 |
| Blue Pearl Nails Ltd | Edinburgh | 2025 |
| Blue Pheonix Limited | Hayes | 2012 |
| Blue Phoenix Marine Ltd | London | 2016 |
| Blue Pirate Services Limited | London | 2011 |
| Blue Pixel Design Limited | Haywards Heath | 2006 |
| Blue Planet Vending Limited | Old Dalby | 2019 |
| Blue Pool Network Limited | Aylesford | 2021 |
| Blue Posts Management Ltd | London | 2023 |
| Blue Power Limited | London | 2025 |
| Blue Print Orthotics Limited | Chesterfield | 2010 |
| Blue Property Maintenance UK Limited | Nottingham | 2007 |
| Blue Raspberry Ltd | Bognor Regis | 2003 |
| Blue Rays Limited | London | 2009 |
| Blue Rebellion Ltd | Glasgow | 2020 |
| Blue Reef Capital Limited | London | 2007 |
| Blue Ridge Kennels Ltd. | Glasgow | 2021 |
| Blue Ridge Runners Ltd | Burnham-On-Sea | 2011 |
| Blue Risk Management UK Limited | Nottingham | 2007 |
| Blue Roan Ltd | Hunstanton | 2002 |
| Blue Rock CAP A4 Limited | Milton Keynes | 2025 |
| Blue Rock Express Limited | London | 2018 |
| Blue Rock Paper Merchants Ltd | Birmingham | 2019 |
| Blue Roman Services Limited | Brentwood | 2009 |
| Blue Roots Limited | Haywards Heath | 2020 |
| Blue Rose Capital Ltd | London | 2020 |
| Blue Rose Counselling Ltd | Sutton Coldfield | 2025 |
| Blue Rose Global Limited | Lisburn | 2020 |
| Blue Rose Holdings Ltd | London | 2021 |
| Blue Rose Management Services Ltd | Lancaster | 2021 |
| Blue Rose T Ltd | Wolverhampton | 2025 |
| Blue Sail Management Ltd | Yarmouth | 2007 |
| Blue Screen Solutions Ltd | Braintree | 2011 |
| Blue Sea Assets Ltd | Brighton | 2016 |
| Blue Serenity Ltd | Kingswinford | 2020 |
| Blue Services Limited | Milton Keynes | 2023 |
| Blue Shard Limited | London | 2018 |
| Blue Sheep Venture Ltd. | London | 2025 |
| Blue Shutters Limited | Weybridge | 2020 |
| Blue Skies Garden Services Limited | High Wycombe | 2013 |
| Blue Skin Limited | London | 2006 |
| Blue Sky Asset Solutions Ltd | Great Yarmouth | 2019 |
| Blue Sky Business Solutions Ltd | Fareham | 2023 |
| Blue Sky Caravans Ltd | Cheddar | 2015 |
| Blue Sky Care Group Ltd | Derby | 2016 |
| Blue Sky Cleaner Ltd | London | 2011 |
| Blue Sky Cooling Limited | Aylesbury | 2014 |
| Blue Sky Design Interiors Limited | Wetherby | 2005 |
| Blue Sky Film & Media Limited | Bath | 2000 |
| Blue Sky Guttering Franchise Limited | Hayes | 2013 |
| Blue Sky Marquees Limited | Pembroke Dock | 2010 |
| Blue Sky OD Ltd | Pinner | 2025 |
| Blue Sky Photography Ltd | Edinburgh | 2014 |
| Blue Sky Polymers Ltd | St. Helens | 2021 |
| Blue Sky PPC Ltd | Wolverhampton | 2021 |
| Blue Sky Property and Portfolio Developments Limited | Cheadle | 2021 |
| Blue Sky Shop Fronts Ltd | Bradford | 2017 |
| Blue Sky Simulations Limited | London | 2005 |
| Blue Sky Snow Day Limited | London | 2018 |
| Blue Sky Surrey Cleaning Ltd | Aldershot | 2026 |
| Blue Sky Tipis Ltd | Borehamwood | 2019 |
| Blue Sky Window Cleaning Ltd | Wallington | 2018 |
| Blue Skys Aviation Limited | Brackley, Northamptonshire | 2018 |
| Blue Sound Limited | Altrincham | 2008 |
| Blue Spaces Wellbeing Ltd | London | 2020 |
| Blue Sparkle Cleaning & Support Limited | London | 2021 |
| Blue Spectrum Consulting Ltd | Blackpool | 2012 |
| Blue Sponge Cleaning Company Ltd | Barry | 2017 |
| Blue Square Cleaning Ltd | Leeds | 2021 |
| Blue Stag Technologies Limited | Bromsgrove | 2016 |
| Blue Star (Turkiye) Ltd | Bristol | 2017 |
| Blue Star Ayrshire Ltd | Prestwick | 2020 |
| Blue Star Company 786 Ltd | Southall | 2007 |
| Blue Star London Ltd | Croydon | 2018 |
| Blue Steel Storage Ltd | Falkirk | 2022 |
| Blue Stefan Ltd | Liverpool | 2019 |
| Blue Stone Home and Garden Ltd | Chippenham | 2003 |
| Blue Suede (UK) Limited | Pinner | 2002 |
| Blue Summit Limited | Walsall | 2017 |