| Bafta Albert Limited | London | 2021 |
| BAG of Beard Limited | London | 2021 |
| BAG of Bones Ltd | Gainsborough | 2020 |
| BAG of Dreams Entertainment Ltd | Sheffield | 2020 |
| Bagatelas & Field Ltd | London | 2025 |
| Baggotonia Productions Ltd | London | 2025 |
| Baggy Trouser Music Limited | Arundel | 2010 |
| Bagillt Bowling Club Ltd | Bagillt | 2022 |
| Baglan Dragons Football Club Limited | Baglan | 2025 |
| Baglan RFC Limited | Port Talbot | 2018 |
| Bagley & Bowes Ltd | London | 2026 |
| Bagonya Ltd | London | 2024 |
| Bagpiper for Hire Ltd | Birmingham | 2025 |
| Bagpiper Online Limited | Glasgow | 2003 |
| Bags of Rock Ltd. | Glasgow | 2010 |
| BAGS2MOVE Limited | Minehead | 2010 |
| Bagshot Library | Bagshot | 2013 |
| Bagshots Limited | Ashford | 1993 |
| Bagsy Official Limited | London | 2025 |
| Bagwins Music Services Ltd | London | 2025 |
| Bagworth Community Centre Trust (2013) Limited | Coalville | 2013 |
| BAH Investment Limited | Harrogate | 2023 |
| Bahamas International Music Festival Limited | Orpington | 2025 |
| Bahamas Loco Trading Ltd. | Wakefield | 1991 |
| Bahamas Motor Sports Assoc Ltd | Abinger Hammer | 2019 |
| Bahbak Hashemi-Nezhad Ltd. | London | 2017 |
| Bahia Management Ltd | Wednesbury | 2021 |
| Bahrain Archive Ltd | London | 2021 |
| BAI Lang Kickboxing Limited | Telford | 2022 |
| Baiez Management Limited | London | 2019 |
| Baila Blast Company Ltd | Worcester Park | 2024 |
| Bailame.X Ltd | London | 2025 |
| Bailando Journey Ltd | Portsmouth | 2020 |
| Bailar Ltd | Martock | 2014 |
| Baildon Rugby Union Football Club Limited | Shipley | 2018 |
| Baile/Baile CIC | Edinburgh | 2024 |
| Bailer Music Publishing Limited | London | 1989 |
| Bailes and Light Ltd | Ilford | 2016 |
| Bailey Balloons Limited | Bristol | 2003 |
| Bailey Grace Films Limited | London | 2019 |
| Bailey James Racing Ltd | Burnley | 2023 |
| Bailey MAY Limited | Norwich | 2025 |
| Bailey Sports Therapy Limited | Chorley | 2015 |
| Bailey's World Ltd | Birmingham | 2024 |
| Baileyplay Limited | Stockton On Tees | 2014 |
| Bailie Harkness Tennis Limited | Rickmansworth | 2007 |
| Bainbridge Sports Coaching Ltd | Huddersfield | 2026 |
| Baines Alsbury Leisure (Derby) Limited | Derby | 2013 |
| Bainland Country Park Limited | Lincoln | 1996 |
| Bainloch Deer Park Limited | Halifax | 2021 |
| Bains Business Holding UK Ltd | Farnborough | 2026 |
| Bainton Bikes Limited | Oxford | 2009 |
| Baird Television Ltd | London | 2006 |
| Baise Media Ltd | Kington | 2025 |
| Baitcomps Ltd | Leeds | 2026 |
| Baiteze Squad Limited | Cardiff | 2017 |
| Baithak Limited | | 2006 |
| Baja Beats UK Ltd | Chatham | 2020 |
| Bajaj Polo UK Ltd | Winkfield | 2025 |
| Bajragroup Ltd | London | 2025 |
| Bakalos Equipment Limited | Birmingham | 2021 |
| Bake HQ Ltd | Poole | 2024 |
| Bake IT! Bristol Ltd | London | 2024 |
| Bake of Art Ltd | London | 2019 |
| Bake With a Legend Limited | London | 2017 |
| Bakehouse Boxing & Martial Arts Ltd | Rugby | 2015 |
| Bakehouse Community Boxing & Wellbeing CIC | Rugby | 2025 |
| Bakehouse Fitness Limited | London | 2021 |
| Bakehouse GY CIC | Great Yarmouth | 2024 |
| Bakehouse Music Ltd | Brighton | 2015 |
| Baker Functions Limited | Crosby | 2017 |
| Baker Performance Ltd | Bedworth | 2026 |
| Baker Street Productions Ltd | London | 2020 |
| Bakers Coaching Ltd | Basingstoke | 2019 |
| Bakewell Agricultural & Horticultural Society | Bakewell | 1994 |
| Bakewell Pottery Painting Ltd | High Peak | 2025 |
| Bakht Arkell Theatrical Services Limited | London | 2018 |
| Baks Sport Limited | Barking | 2016 |
| Bakthi UK TV | London | 2024 |
| BAL Polski CIC | London | 2016 |
| Bal-T Ltd | Hayes | 2024 |
| Bala & District Motor Club Limited | Gwynedd | 1992 |
| Bala 4X4 Limited | Bala | 2010 |
| Bala Adventure & Watersports Limited | Bala | 2003 |
| Bala Judo Club Ltd | Llan Ffestiniog | 2024 |
| Bala Town Football Club Limited | Bala | 2010 |
| Balaa Studios Ltd | Fitzrovia | 2024 |
| Balabusta Productions Limited | London | 2018 |
| Balanc.D Ltd | Worcester | 2025 |
| Balance & Options Ltd | Watford | 2016 |
| Balance and Breathe Yoga Ltd | London | 2025 |
| Balance and Burn Studio Limited | London | 2023 |
| Balance Artists Ltd | Eastcote | 2018 |
| Balance Brazilian Jiu-Jitsu Ltd | Marlow | 2025 |
| Balance by Lizzie Ltd | Huntingdon | 2025 |
| Balance Entertainment Limited | Edgware | 2019 |
| Balance Fitness Limited | London | 2024 |
| Balance Grappling Limited | London | 2023 |
| Balance Holistic Group Ltd | London | 2023 |
| Balance Leisure Fitness Ltd | Belfast | 2014 |