| Bigland Management Limited | Radlett | 2008 |
| Biglands Bari Limited | Hainault Business Park | 2023 |
| BIGMANBUTIAINT30 Ltd | London | 2023 |
| Bigmore Wills and Probate Limited | Walton-On-Thames | 2016 |
| Bigmother.Ai CIC | Cambridge | 2018 |
| Bignan Consultants Ltd | Ivybridge | 2010 |
| Bignarstie Ltd | South Woodham Ferrers | 2015 |
| Bigoudi Hair Ltd | Croydon | 2021 |
| Bigpats Parcels Ltd | London | 2015 |
| Bigraycutz Ltd | Salford | 2024 |
| Bigsteps Consulting Ltd | Stanmore | 2011 |
| Bigsy Hair Limited | Rayleigh | 2023 |
| Bigtinylittle Limited | Galston | 2018 |
| Bigtreece Event Limited | Canvey Island | 2021 |
| Biguik Ltd | London | 2022 |
| Bigvits Group Limited | Driffield | 2016 |
| Bigyouup Ltd | London | 2013 |
| Bigzbarber Ltd | Leeds | 2025 |
| Bihari Connect UK Ltd | Slough | 2017 |
| Bihari Society UK | Buckinghamshire | 2018 |
| Bihi 90 Ltd | London | 2018 |
| Bii.Aero Ltd | South Nutfield | 2019 |
| Biiz NH Ltd | London | 2024 |
| Bijou Baby Safety Ltd | Southampton | 2023 |
| Bijou Beauty Limited | London | 2016 |
| Bijou Body Piercing Ltd | Belfast | 2022 |
| Bijou Diamond Jewellery Ltd | Manchester | 2012 |
| Bijou Hair & Beauty Limited | Derby | 2008 |
| Bijou Hairdressing IW Ltd | Southampton | 2012 |
| Bijou London Tailoring Ltd | Mitcham | 2020 |
| Bijoux Aesthetics Ltd | Newcastle Upon Tyne | 2024 |
| Bijoux Beautique Ltd. | Wixams | 2015 |
| Bijoux Brows Academy Limited | Kilmarnock | 2023 |
| Bijoux Brows Limited | Hebburn | 2017 |
| Bijoux Hair Limited | Hebburn | 2015 |
| Bijoux Retail Ltd | Greenock | 2019 |
| Biju Beauty Limited | Huddersfield | 2012 |
| Biju Northallerton Limited | Middlesbrough | 2017 |
| Bikafreelance Limited | London | 2025 |
| Bike Boss Ltd | Nottingham | 2025 |
| Bike Fest Live Limited | Warwick | 2017 |
| BIKEABILITY4WALES Ltd | Mid Glam | 2021 |
| Bikeanics Limited | Oldham | 2013 |
| Bikem Support and Empowerment CIC | London | 2024 |
| Biker Howff Motorcycle Storage Ltd | Glasgow | 2016 |
| Bikers Care Approved Limited | Fareham | 2018 |
| Bikesafe Ltd | Milton Keynes | 2024 |
| Bikesmiths Ltd | North Somerset | 2019 |
| Bikesnbits Ltd | Gravesend | 2017 |
| Bikestand Solutions Ltd | Milton Keynes | 2024 |
| Biketastic Ltd | Harrow | 2024 |
| Biko Empire Barbers Ltd | Sheffield | 2025 |
| Bikos Ltd | London | 2016 |
| Bikoy Limited | Tilbury | 2014 |
| Bikram Hot Yoga Chiswick Limited | London | 2012 |
| Bilal Babam Limited | St. Neots | 2025 |
| Bilal Barbers Limited | Huntingdon | 2019 |
| Bilal Gazi Ltd | Salisbury | 2024 |
| Bilal Hairdressers Limited | London | 2026 |
| Bilaman R Limited | Leytonstone | 2021 |
| Bilan Service Ltd | London | 2025 |
| Bilan Textiles Ltd | Birmingham | 2026 |
| Bilanx Machine Business Management Ltd | London | 2020 |
| Bilatiis Ltd | Bolton | 2025 |
| Bilatteral Ltd | Leighton Buzzard | 2012 |
| Bilba Clinic Limited | London | 2023 |
| Bilbas Nice Barber London Ltd | London | 2022 |
| Bilberry Cottage Limited | Sowerby Bridge | 2017 |
| Bilbo's Pet Spa Limited | Blakeney | 2016 |
| Bild Association of Certified Training | London | 2018 |
| Bild Restraint Reduction Network | London | 2018 |
| Bilen Barbers Ltd | Margate | 2020 |
| Bilibon Ltd | London | 2019 |
| Bilimbi Ltd | London | 2023 |
| Bilimway Training and Consultancy Ltd | Waltham Cross | 2016 |
| Bilitanonne Ltd | London | 2020 |
| Biliv Care Limited | Birmingham | 2018 |
| Bilko Aviation Limited | Rugby | 2022 |
| Bill & Sons Ltd | Chelmsford | 2020 |
| Bill and MAR Limited | London | 2017 |
| Bill Cross Marine Services Ltd | Wirral | 2016 |
| Bill Dunham Consulting Ltd | Taunton | 2019 |
| Bill Dyson Skip Hire & Waste Management Limited | West Yorkshire | 2003 |
| Bill Giles Fencing Ltd | Bournemouth | 2026 |
| Bill Hewlett Limited | Ipswich | 2016 |
| Bill Minder Limited | Leeds | 2023 |
| Bill Passmore International Limited | Stourbridge | 2016 |
| Bill Smart Home Emergency Ltd | Bournemouth | 2019 |
| Bill Underwood Hair Ltd | London | 2022 |
| Bill's Blind Spot Ltd | Glasgow | 2015 |
| Bill's Traditional Turkish Barbers Limited | Rochford | 2017 |
| Bill.Me Ltd | London | 2017 |
| Billa Champion Ltd | London | 2023 |
| Billals Cleaning Point Limited | Ilford | 2011 |
| Billani Ltd | London | 2021 |
| Billcoe PV Ltd | Leicester | 2024 |
| Billericay (T) Hairdressing Limited | Alton | 2003 |
| Billericay Barber Shop Limited | Billericay | 2000 |
| Billericay Bathroom Design Limited | Wickford | 2013 |
| Billericay Beauty House Ltd | Chelmsford | 2023 |