| Best Roti Ltd | Hospitality | 2022 |
| Betta Brand Ltd | Manufacturing | 2019 |
| Bettabodies Fitness Limited | Health & social care | 2014 |
| Better Sundays Limited | Wholesale & retail | 2025 |
| BEV Bruce Investments Limited | Real estate | 2019 |
| Bevan & Chapman Consulting Limited | Administrative & support | 2017 |
| Bevan and Chapman Limited | Administrative & support | 2002 |
| Bevan Consultants Limited | Professional & scientific | 2015 |
| BF (Nelson) Ltd | Real estate | 2021 |
| BGM Consultancy Services Ltd | Professional & scientific | 2023 |
| Big Break Bites Ltd | Hospitality | 2025 |
| Big Break Snooker Ltd | Arts & recreation | 2016 |
| Big Data Engineering Limited | Information & communication | 2019 |
| Big Soup Residential Limited | Hospitality | 2019 |
| Bikedok Ltd | Administrative & support | 2024 |
| Bikerbuddy Ltd | Information & communication | 2025 |
| Billys Taxis Limited | Transport & logistics | 2025 |
| Bingley Boundaries Fencing and Gardening Services Limited | Construction | 2020 |
| Bingley Textile Supplies Limited | Manufacturing | 2004 |
| Bingley Window and Glass Company Limited | Manufacturing | 2010 |
| Bio-Nature Limited | Administrative & support | 2004 |
| Bioshade Limited | Manufacturing | 2009 |
| Bixi Consultancy Ltd | Households | 2021 |
| Bizzy Brainz Ltd | Education | 2019 |
| BKM Garage Ltd | Wholesale & retail | 2025 |
| Black Brothers (Cheadle) Limited | Real estate | 2025 |
| Black Brothers (Harrogate) Limited | Real estate | 2022 |
| Black Brothers (Ilkley) Limited | Real estate | 2023 |
| Black Brothers (Malton) Limited | Real estate | 2025 |
| Black Brothers (Stamford) Limited | Real estate | 2025 |
| Black Family (Durham) Limited | Real estate | 2021 |
| Black Family Investments Limited | Administrative & support | 2008 |
| Black Milk Limited | Professional & scientific | 2007 |
| Black Moor Properties Limited | Real estate | 2023 |
| Black Raccoon Consulting Ltd | Professional & scientific | 2026 |
| Blackburn Haulage Logistics Ltd | Transport & logistics | 2026 |
| Blackburn Robinson Limited | Administrative & support | 2002 |
| Blackjacks Shop Ltd | Wholesale & retail | 2025 |
| Blackstone Bridge UK Ltd | Wholesale & retail | 2026 |
| Blackwells Solicitors Limited | Professional & scientific | 2019 |
| Bladze Barbers Ltd | Other services | 2021 |
| Blands Waste Products Limited | Administrative & support | 2004 |
| Blaro Property Services Limited | Real estate | 1988 |
| Blaze Supplies Ltd | Wholesale & retail | 2023 |
| Blazing Motorcycles Limited | Wholesale & retail | 2015 |
| Blessed Life Limited | Administrative & support | 2019 |
| Blindgiant Ltd | Wholesale & retail | 2018 |
| Bloomhill Properties Limited | Administrative & support | 1998 |
| Bloomin Marvellous Flowers Limited | Wholesale & retail | 2019 |
| Blossom INNOV8 Limited | Information & communication | 2021 |
| BLP Aesthetics and Beauty Ltd | Other services | 2026 |
| Blue Chip Investments (Yorkshire) Ltd | Arts & recreation | 2023 |
| Blue Iris Homewares Ltd | Wholesale & retail | 2022 |
| Blue Moon Online Enterprises Ltd | Wholesale & retail | 2025 |
| Blue Ocean Management Services Limited | Professional & scientific | 2015 |
| Blue Ribbon Walk Ltd | Real estate | 2023 |
| Blue Signal Systems Ltd | Information & communication | 2025 |
| Blue Sky Event Catering Services Ltd | Wholesale & retail | 2023 |
| Blue Sky Event Services Limited | Wholesale & retail | 2022 |
| Blue Weave Welds Ltd | Manufacturing | 2017 |
| Blueprint Product Design Consultants LLP | | 2017 |
| Blugibbon Ltd | Health & social care | 2016 |
| BM North Limited | Wholesale & retail | 2026 |
| BMB Engineering Ltd | Professional & scientific | 2021 |
| BMT Maintenance Ltd | Construction | 2019 |
| BNM Light Haulage Ltd | Transport & logistics | 2022 |
| Bobhod Limited | Construction | 2015 |
| Bodyfix Physio Limited | Health & social care | 2005 |
| Bolling Projects Limited | Construction | 2015 |
| Bolling Properties Limited | Households | 2024 |
| Bolton Gardens (Silsden) Management Company Limited | Households | 2021 |
| Bolton Road Allotments C.I.C. | Agriculture & fishing | 2022 |
| Bondmark Properties Limited | Real estate | 1999 |
| Bonne Voie Consulting Ltd | Professional & scientific | 2019 |
| Boosta Bappa Limited | Real estate | 2024 |
| Border Leisure Parks Limited | Hospitality | 2019 |
| Born and Red Productions Ltd | Information & communication | 2025 |
| Bostan Medical Services Limited | Health & social care | 2012 |
| Bottle Shock Limited | Hospitality | 2024 |
| Bowerbank Property Services Ltd | Administrative & support | 2018 |
| BPM Bathroom Supplies Ltd | Wholesale & retail | 2013 |
| Bracken Bank Stores Ltd. | Wholesale & retail | 2003 |
| Bradbury, Stephenson and Co. Limited | Real estate | 1983 |
| Bradford (Holdings) Limited | Professional & scientific | 1992 |
| Bradvent Management Services Limited | Construction | 2021 |
| Brampton Enterprises Ltd | Health & social care | 2012 |
| Brands Bargain Ltd | Wholesale & retail | 2018 |
| Brassington Birtwistle Limited | Real estate | 1999 |
| Bree Merryn Art Limited | Other services | 2016 |
| Bree Merryn Art Online Limited | Arts & recreation | 2019 |
| Bree's Herbal Teas Ltd | Manufacturing | 2022 |
| Brenmoor Ltd | Manufacturing | 2005 |
| Bridge Car Hire Limited | Other services | 2014 |
| Bridge Patterns 3D Limited | Manufacturing | 2017 |
| Brighouse Healthcare Limited | Wholesale & retail | 2023 |
| Bright Horizon Constructions Limited | Construction | 2017 |
| Brightfox UK Ltd | Wholesale & retail | 2023 |
| Brim Burgers Mile END Ltd | Hospitality | 2024 |
| Britannia Door Panels Limited | Manufacturing | 2018 |
| Britannia Mobility & Bathing Aids Limited | Information & communication | 2017 |