| Bioveda Holdings LP | | 2016 |
| Biozone Learning Media (UK) Limited | Information & communication | 1998 |
| BIP Candy & Toys UK Limited | Wholesale & retail | 1999 |
| Bipyramid Ltd | Real estate | 2022 |
| Biravi LP | | 2014 |
| Birch Assist Limited | Health & social care | 2009 |
| Birch House (Trustees) Limited | Administrative & support | 2025 |
| Birchbrae Scotland Limited | Hospitality | 2008 |
| Birchmuir Limited | Professional & scientific | 2001 |
| Birchwood Art Studio Ltd. | Arts & recreation | 2020 |
| Birchwood Bistro Wine Limited | Hospitality | 2024 |
| Bircode Technologies Ltd | Information & communication | 2026 |
| Bird Brain Software Ltd | Information & communication | 2024 |
| Bird Feed Ltd | Hospitality | 2020 |
| Bird File SP | | 2001 |
| Bird SLP 1 LP | | 2015 |
| Birdham Sales LP | | 2015 |
| Birds' EYE Vista Ltd | Professional & scientific | 2020 |
| Birkiewood Ltd | Administrative & support | 2020 |
| Birla Softwares Ltd | Administrative & support | 2021 |
| Birlinn Limited | Information & communication | 1992 |
| Birnam Investments Limited | Professional & scientific | 2016 |
| Birnam Trading Limited | Hospitality | 2015 |
| Birnam Villa LP | | 2012 |
| Birnam Villa Unlimited | Administrative & support | 2011 |
| Birnie Ltd | Construction | 2023 |
| Birou DE Orice Ltd | Professional & scientific | 2019 |
| Birrell and Rainford Opticians Limited | Health & social care | 2010 |
| Birrell Property Holdings Limited | Real estate | 2026 |
| Birth and Beyond Ltd | Information & communication | 2017 |
| Birthing Solutions Limited | Manufacturing | 2017 |
| Birthtree Limited | Agriculture & fishing | 2020 |
| Biryani Box EDI Ltd | Hospitality | 2020 |
| Biryani Box Scotland Ltd | Hospitality | 2025 |
| Bisbrook Business LP | | 2019 |
| Biscayne International | | 2002 |
| Biscoat Bakery Ltd | Manufacturing | 2026 |
| Biscuit Box Edin Limited | Hospitality | 2020 |
| Biscuit TIN Ltd | Information & communication | 2023 |
| Biscuit TIN Planning Limited | Other services | 2016 |
| Bishop Infrastructure L.P. | | 2012 |
| Bishop Infrastructure S1 L.P. | | 2012 |
| Bishop Infrastructure S2 L.P. | | 2012 |
| Bishop Infrastructure S2A L.P. | | 2013 |
| Bishop Watson Limited | Administrative & support | 2023 |
| Bismark Corp. LP | | 2016 |
| Bisset Executive Travel LP | | 2012 |
| Bistadd Ltd | Manufacturing | 2026 |
| BIT Developments Europe LP | | 2014 |
| Bita Impex L.P. | | 2019 |
| Bitb Cash Ltd | Arts & recreation | 2020 |
| Bitbunny Limited | Information & communication | 2020 |
| Bitcatch LP | | 2015 |
| Bitchin Pieces Hair Extensions Ltd | Other services | 2023 |
| Bite Dentistry Limited | Health & social care | 2014 |
| Bite ME! Cafe Bar Limited | Hospitality | 2010 |
| Bite Size Games Limited | Information & communication | 2014 |
| Bitey Bear Media Ltd | Professional & scientific | 2024 |
| Bitmonsters LP | | 2016 |
| Bitone Development LP | | 2014 |
| Bitone Financial LP | | 2016 |
| Bitrix LP | | 2012 |
| Bits and Pieces Ltd | Information & communication | 2018 |
| Bittersweet Ltd | Hospitality | 2021 |
| Bitumtex Commercial LP | | 2013 |
| Biuropl Limited | Real estate | 2018 |
| BIZ Corp. Ltd | Information & communication | 2012 |
| Bizamz Trading Co Ltd | Wholesale & retail | 2021 |
| Bizcare Services Limited | Information & communication | 2023 |
| Bizlaw Cosporation LP | | 2015 |
| Bizlaw Services LP | | 2015 |
| Bizmaster Systems LP | | 2017 |
| Bizmasters Alliance LP | | 2017 |
| Biznet Corporation LP | | 2017 |
| Biznex Solutions LP | | 2016 |
| BJ Mander Medical Services Ltd | Health & social care | 2017 |
| BJM Solutions Limited | Information & communication | 2005 |
| Bjork Wall LP | | 2016 |
| Bjorneborg LP | | 2014 |
| BJP Aero LP | | 2016 |
| BJP Investment Management Ltd | Extraterritorial | 2012 |
| Bjvc Properties Limited | Real estate | 2025 |
| BJW Plumbing & Tiling Ltd | Construction | 2025 |
| BK Capital Partners | | 1991 |
| BK Event Production Ltd | Information & communication | 2020 |
| BK Projects L.P. | | 2016 |
| BK Property Holding Ltd | Real estate | 2025 |
| BK Tech Solutions LP | | 2017 |
| BK Verdo Trade LP | | 2016 |
| BKM Scotland Limited | Construction | 2024 |
| Bkms II L.P. | | 2018 |
| Bkms L.P. | | 2016 |
| BKS Finance LP | | 2018 |
| BKS Visual Limited | Professional & scientific | 2008 |
| BL West Farm Commercial Limited | Construction | 2014 |
| BL West Farm Residential Limited | Construction | 2014 |
| Black & Co Corporate Ltd. | Professional & scientific | 2012 |
| Black & Lizars Limited | Wholesale & retail | 1998 |
| Black & Sons Window Cleaning Ltd | Administrative & support | 2024 |
| Black & White Publishing Limited | Information & communication | 1999 |