| Blue Butterfly Dance Company Limited | Eastleigh | 2018 |
| Blue Carpet Management Limited | Ipswich | 2015 |
| Blue Chilli Flying Limited | Bedford | 2016 |
| Blue Chip Content Limited | High Wycombe | 2021 |
| Blue Chip Interactive Limited | Cheadle | 1997 |
| Blue Chip Investments (Yorkshire) Ltd | Keighley | 2023 |
| Blue Coast Surf Ltd | Banff | 2024 |
| Blue Coat School Heritage Centre | Londonderry | 2018 |
| Blue Court Leicester Ltd | Leicester | 2026 |
| Blue Court Projects Ltd | Leicester | 2025 |
| Blue Cove Resorts Limited | Mountsorrel | 2005 |
| Blue Creed Entertainment World Limited | London | 2018 |
| Blue Crown Entertainment Limited | Ruislip, | 2025 |
| Blue Dawn Studios Limited | Walsall | 2018 |
| Blue Designs Ltd | London | 2002 |
| Blue Dips Ltd | Harrow | 2017 |
| Blue Dolls Creations Ltd | Currie | 2024 |
| Blue Dolphin Yachting Ltd | London | 2025 |
| Blue DOT Adventure Limited | Hollinwood | 2009 |
| Blue DOT Travel Ltd | London | 2018 |
| Blue Dragon Artwork Ltd | York | 2022 |
| Blue Dragon Combat Limited | Southampton | 2015 |
| Blue Dress Movie Ltd | London | 2022 |
| Blue Electric Agency Limited | Gloucester | 2026 |
| Blue Elephant Theatre Limited | London | 1999 |
| Blue Environment CIC | Plymouth | 2008 |
| Blue EYE Events Ltd | Twickenham | 2024 |
| Blue Eyed Books Limited | London | 2015 |
| Blue FIN Diving Ltd | Gainsborough | 2022 |
| Blue Fire Theatre Company Ltd | Teddington | 2017 |
| Blue Fitness Limited | Birmingham | 2025 |
| Blue Flag Visual Limited | Potters Bar | 2017 |
| Blue Flame Band Ltd | London | 2024 |
| Blue Flames Sporting Club Limited | Newcastle Upon Tyne | 1996 |
| Blue Flamingo Entertainments Ltd | Barnet | 2008 |
| Blue Flamingo Music Limited | Hertford | 1988 |
| Blue Flowers Music 2010 Ltd | Wallington | 2010 |
| Blue FOX Events (Leicester) Ltd | Loughborough | 2019 |
| Blue Frog Events Ltd | Treforest Industrial Estate | 2025 |
| Blue Genie Entertainment Limited | Maidstone | 2013 |
| Blue Gold Promotions Ltd | Romford | 2023 |
| Blue Grid Art Ltd | London | 2015 |
| Blue Gunner Limited | Woking | 2015 |
| Blue Haven Productions Limited | Edinburgh | 2019 |
| Blue Highways Limited | London | 2026 |
| Blue Hippo Diving Limited | Glasgow | 2012 |
| Blue Ice Cheerleaders Ltd | Retford | 2023 |
| Blue Inc Design Ltd | Heywood | 2007 |
| Blue International Talent Ltd | London | 2019 |
| Blue JAY Theatre Company Ltd | Chester | 2025 |
| Blue Jeans Management Ltd | Chipping Norton | 2016 |
| Blue John Cavern Limited | Hope Valley | 2024 |
| Blue Kangaroo Design Limited | Newcastle Upon Tyne | 2006 |
| Blue Kangaroo Play Limited | Cottingham | 2008 |
| Blue Lagoon Arts C.I.C. | Caerphilly | 2019 |
| Blue Lavender Music Limited | Dartford | 2025 |
| Blue Leisure Management Limited | Haywards Heath | 2010 |
| Blue Line Adventures Limited | Tunbridge Wells | 2026 |
| Blue Line Motion Limited | London | 2025 |
| Blue Marble Events Ltd | Worcester | 2025 |
| Blue Marble Web Ltd | London | 2023 |
| Blue Martini Group Limited | Beaconsfield | 2014 |
| Blue Masque Limited | Manchester | 2008 |
| Blue Media Group Limited | Weybridge | 1989 |
| Blue Medusa Ltd | London | 2025 |
| Blue Melodies Records Ltd | London | 2026 |
| Blue Melon Records Limited | London | 1998 |
| Blue Mill Studios Ltd | Leominster | 2019 |
| Blue Monkey Sales Limited | Bridgend | 2014 |
| Blue Moon Blood Stock Limited | Meriden | 2009 |
| Blue Moon Entertainment Ltd | Manchester | 2017 |
| Blue Moon Leisure UK Limited | Ilfracombe | 2005 |
| Blue Moon Tattoo LB Ltd | Leighton Buzzard | 2023 |
| Blue Moose Dance Company CIC | Preston | 2014 |
| Blue Mountain Activities Limited | Chesterfield | 2009 |
| Blue Mountain Productions Ltd | London | 2025 |
| Blue Mouse Events CIC | Newton-Le-Willows | 2023 |
| Blue Murder Events Limited | Cupar | 2007 |
| Blue NED Limited | London | 2017 |
| Blue Neil Limited | Beckenham | 2003 |
| Blue Oak Audio Ltd | Barry | 2015 |
| Blue Ocean Waves Centre Ltd | Wembley | 2021 |
| Blue on the Hill CIC | London | 2023 |
| Blue Orange Arts Ltd | Birmingham | 2011 |
| Blue Orchids Films Ltd | Carshalton | 2022 |
| Blue Oriental Ltd | London | 2025 |
| Blue Otter Boats Ltd | Harrogate | 2017 |
| Blue OWL Enterprises Limited | Great Horksley | 2014 |
| Blue OWL Events Ltd | Charlton Adam | 2017 |
| Blue Padel Limited | London | 2025 |
| Blue Palette Art Studio Limited | Kingston Upon Thames | 2017 |
| Blue Panda Productions Limited | London | 2020 |
| Blue Park Theatre Company Ltd | Bury St. Edmunds | 2024 |
| Blue Parrot Ltd | Cheltenham | 2009 |
| Blue Parrot Productions Ltd | Cheltenham | 2010 |
| Blue PEN (SW) Ltd | Exeter | 2025 |
| Blue Pencil Theatre Ltd | London | 2024 |
| Blue Peregrine Limited | Betchworth | 2026 |
| Blue Phoenix Performing Arts Ltd | Brenzett | 2024 |
| Blue Phoenix Productions Ltd | Brenzett | 2019 |