| Best & Smith Property Ltd | Real estate | 2021 |
| Best Bacon Ltd | Manufacturing | 2023 |
| Bethel Ventures Ltd | Real estate | 2024 |
| Betta Butties Limited | Hospitality | 2022 |
| BEV Cross Education & Training Limited | Education | 2008 |
| BGR8 Ltd | Wholesale & retail | 2007 |
| BHP Cars Limited | Wholesale & retail | 2010 |
| Big Zoltan Logistics Ltd | Water & waste | 2022 |
| BIKES4LIFE Limited | Wholesale & retail | 2013 |
| Bill Tinsley Consultancy Limited | Professional & scientific | 2013 |
| Bingbong Appliances L Limited | Extraterritorial | 2026 |
| Bingbongs Appliances Ltd | Wholesale & retail | 2026 |
| Birchwood Lodge Airfield Limited | Real estate | 2025 |
| Birchwood Lodge Business Park Limited | Real estate | 2025 |
| Bishop Meadows Properties Limited | Real estate | 2025 |
| Bistro ZU Ltd | Hospitality | 2023 |
| BJF Flooring Limited | Construction | 2026 |
| Black Butter Limited | Professional & scientific | 2025 |
| Black Marketeers Ltd | Professional & scientific | 2013 |
| Black Swan Group Limited | Information & communication | 2025 |
| Blackhouse Management Limited | Real estate | 2019 |
| Blackley Estates Asset Managment Ltd | Real estate | 2019 |
| Blackley Estates Ltd | Real estate | 2016 |
| Blackley Estates Two Ltd | Real estate | 2023 |
| Blackstone Investment Properties Ltd | Real estate | 2018 |
| Blackwood Hall Holdings Ltd | Financial services | 2024 |
| Blackwood Hall Ltd | Households | 2005 |
| Blak Bear Harrogate Ltd | Other services | 2024 |
| Blanchard Electrical Services Ltd | Construction | 2017 |
| Blenheim Fire Ltd | Public administration | 2019 |
| Bliss Films Limited | Information & communication | 2010 |
| Blood Sweat & Gears C.I.C. | Wholesale & retail | 2024 |
| Bloom & Boundary Gardening and Fencing Ltd | Administrative & support | 2024 |
| Blossoms Day Nursery - Field View Limited | Education | 2021 |
| Blossoms Day Nursery - the New Mill Limited | Education | 2018 |
| Blubear Investments Ltd | Real estate | 2025 |
| Blue Box Medical Limited | Administrative & support | 2004 |
| Blue Chime Ventures Ltd | Professional & scientific | 2022 |
| Blue Flame Heating and Plumbing Ltd | Construction | 2022 |
| Blush and Bloom Limited | Arts & recreation | 2020 |
| Bmhr Ltd | Real estate | 2022 |
| Bobbleboo Ltd | Manufacturing | 2022 |
| Bodyshop Consultancy Services Limited | Professional & scientific | 2020 |
| Bold Body Collective Limited | Arts & recreation | 2025 |
| Bold Venture Partners Ltd | Wholesale & retail | 2025 |
| Boobear Ltd | Information & communication | 2022 |
| Borrows Planning Consultancy Ltd | Administrative & support | 2016 |
| Boss Design & Build Limited | Construction | 2010 |
| Boston Bites Ltd | Wholesale & retail | 2025 |
| Bounceback Sports Coaching Ltd | Education | 2025 |
| Bowker Thomas Consultants Ltd | Real estate | 2018 |
| Bowlsec Limited | Administrative & support | 2018 |
| BPW Consulting Ltd | Professional & scientific | 2025 |
| Bramble & Bloom Ltd | Agriculture & fishing | 2026 |
| Bramley Construction (Yorkshire) Limited | Construction | 2021 |
| Branded Spooling Ltd | Manufacturing | 2022 |
| Brayton Headstart Preschool Ltd | Education | 2022 |
| Brayton Mews Management Co. Limited | Households | 1985 |
| Brecks Engineering Limited | Manufacturing | 2014 |
| Brenchley Associates Limited | Hospitality | 2002 |
| Brent Scaffold Boards (Holdings) Limited | Professional & scientific | 2000 |
| Brent Scaffold Boards Limited | Other services | 1992 |
| Brickquid Limited | Real estate | 2025 |
| Brightbird Agency Ltd | Professional & scientific | 2025 |
| Brindal Electrical & Security Solutions Ltd | Manufacturing | 2012 |
| Bromley Wealth Management Ltd | Professional & scientific | 2020 |
| Brooks & Co Properties Limited | Real estate | 2017 |
| Broomfield Court Management Limited | Households | 1991 |
| Brorce Ltd | Real estate | 2025 |
| Brothers Property Limited | Real estate | 2010 |
| Brown Clark Property Holdings Limited | Real estate | 2025 |
| Brown's Bakery Limited | Wholesale & retail | 2007 |
| BRT Property Ltd | Real estate | 2023 |
| Bsim Consulting Ltd | Professional & scientific | 2017 |
| BTS Property Management Services Ltd | Real estate | 2018 |
| Bubble Heaven (Stockport) Limited | Other services | 2019 |
| Bubcommercial Ltd | Wholesale & retail | 2022 |
| Bubwith Leisure Centre Limited | Hospitality | 2003 |
| Buddog Ltd | Wholesale & retail | 2021 |
| Build North Yorkshire Ltd | Construction | 2025 |
| Burley & Sons Enterprises Ltd | Construction | 2026 |
| Burn Gliding Club Ltd(The) | Arts & recreation | 1959 |
| Burn Road Fisheries Ltd | Agriculture & fishing | 2024 |
| Burne Ltd | Construction | 2022 |
| Burton Cars Ltd | Wholesale & retail | 2016 |
| Burwash Flat 12A Jennifer's RTM Company Limited | Real estate | 2012 |
| Business Training Ventures Limited | Education | 2004 |
| Busy VS Sweets & Treats Ltd | Hospitality | 2025 |
| Butterlane Bakery Ltd | Hospitality | 2020 |
| BWH Alliance Limited | Extraterritorial | 2021 |
| BY Bella Beauty Limited | Other services | 2025 |
| BY BEX & Co Limited | Health & social care | 2023 |
| C H Upholstery Limited | Other services | 2007 |
| C J Elcock Limited | Agriculture & fishing | 2018 |
| C J Hewletts Limited | Construction | 2018 |
| C K Space Ltd | Real estate | 2021 |
| C L Planning Ltd | Real estate | 2025 |
| C Lowson Limited | Professional & scientific | 2003 |
| C M a Costs Consultants Limited | Professional & scientific | 2023 |
| C Scott Properties Ltd | Real estate | 2025 |