| Berkshire (East) Limited | Real estate | 2024 |
| Berkshire (South) Limited | Real estate | 2024 |
| Bermar Estates Limited | Real estate | 2024 |
| Bhavaneesha Traders Ltd | Wholesale & retail | 2026 |
| Billingsgate Holdings Limited | Construction | 2024 |
| Bioqual Regulatory Ltd | Professional & scientific | 2024 |
| Bj's Autoshop Limited | Wholesale & retail | 2003 |
| Black HAY LLP | | 2024 |
| Black HAY Trustees Limited | Other services | 2019 |
| Blaig (UK) Limited | Real estate | 2022 |
| Blue Fish Property Ltd | Real estate | 2024 |
| Blue Star Ayrshire Ltd | Other services | 2020 |
| Body Art Piercing Limited | Other services | 2000 |
| Bonacres Limited | Real estate | 2022 |
| Bonnie Abodes Ltd | Real estate | 2024 |
| Boydfield Garage Ltd | Wholesale & retail | 2023 |
| Braehead Advisory Ltd | Information & communication | 2018 |
| Brainstormers Marketing Ltd Limited | Wholesale & retail | 2025 |
| Braithrean Consulting Limited | Professional & scientific | 2025 |
| Bramleys of Prestwick Ltd | Hospitality | 2020 |
| Bride&Vroom Ayrshire Ltd | Transport & logistics | 2025 |
| Brightstar Drex Ltd | Administrative & support | 2012 |
| Britannia Capital Partners LLP | | 2013 |
| Broadhill Holdings Limited | Construction | 2023 |
| Broadsword Charters Limited | Arts & recreation | 1987 |
| BTL Consultancy Ltd | Information & communication | 2020 |
| Buddy Lettings Ltd | Real estate | 2021 |
| Bulltom Limited | Extraterritorial | 2018 |
| Burlesque Blue Ltd. | Wholesale & retail | 2008 |
| Business Solutions by RH Associates Limited | Professional & scientific | 2022 |
| Bywell Holdings | Real estate | 2025 |
| C&C Design Services Limited | Administrative & support | 2003 |
| Cad-Mann Ltd | Administrative & support | 2007 |
| Cairney Consulting Limited | Information & communication | 2019 |
| Caley Myrtle Limited | Real estate | 2026 |
| Cali's Barking MAD Pet Supplies Ltd | Wholesale & retail | 2025 |
| Campbell Software Solutions Limited | Information & communication | 2000 |
| Caprius (UK) Ltd | Administrative & support | 2001 |
| Caroline Jones Consulting Limited | Professional & scientific | 2005 |
| Carrera Consultants Ltd | Administrative & support | 2016 |
| Carrick + Stone Limited | Hospitality | 2026 |
| Carrick Alloy Restoration LLP | | 2021 |
| Carrick Alloys Limited | Wholesale & retail | 2017 |
| Carrickmor Holdings Ltd | Financial services | 2021 |
| Carters Nominees Limited | Professional & scientific | 2023 |
| Casacat Press Ltd | Information & communication | 2021 |
| Cassilis Process and Energy Ltd | Professional & scientific | 2015 |
| Cayr Limited | Health & social care | 2020 |
| Cecchini Property Limited | Real estate | 2020 |
| Cggb International Ltd | Information & communication | 2026 |
| Chede Ltd | Transport & logistics | 2014 |
| CHR Building Surveys Ltd | Construction | 2025 |
| Christie Well Services Limited | Administrative & support | 2001 |
| Christine Forbes Consultancy Limited | Administrative & support | 2017 |
| Cir-Sed Ltd. | Administrative & support | 2006 |
| CJM Lumina Ltd | Professional & scientific | 2008 |
| CK Risk Solutions Ltd | Professional & scientific | 2022 |
| Clear View Windows Scotland Limited | Administrative & support | 2025 |
| Clon Limited | Administrative & support | 2014 |
| Club Coco Ltd | Other services | 2021 |
| Cmsg Ltd | Information & communication | 2020 |
| Co Works Limited | Professional & scientific | 2010 |
| Cochrane Psychological Services Ltd | Professional & scientific | 2021 |
| Colours Prestwick Limited | Other services | 2008 |
| Construction & Property Management Limited | Professional & scientific | 2008 |
| Constructive Architectural Design Limited | Professional & scientific | 2004 |
| Consultancy Project Services Limited | Professional & scientific | 2000 |
| Coolflame Heating Ltd | Professional & scientific | 2016 |
| County Vets Limited | Professional & scientific | 2015 |
| Coutts Engineering Ltd. | Administrative & support | 2006 |
| Craig Brands Electrical Limited | Construction | 2003 |
| Craig Poole Ltd | Extraterritorial | 2025 |
| Creaam Limited | Real estate | 2011 |
| Creative Process (UK) Limited | Administrative & support | 2005 |
| Cresta Knitwear Company Limited | Real estate | 1972 |
| Cristal Geological Services Limited | Administrative & support | 2006 |
| Crosswind Holdings Limited | Financial services | 2026 |
| Cruel Mistress Sports Ltd | Wholesale & retail | 2025 |
| Crystal TEX Ltd | Wholesale & retail | 2025 |
| CSM Processing Ltd | Administrative & support | 2017 |
| Culzean Innovations Ltd. | Manufacturing | 2009 |
| Culzean Ltd | Extraterritorial | 2016 |
| Culzean Medical Devices Ltd | Manufacturing | 2021 |
| Culzean Medical Ltd | Manufacturing | 2021 |
| Culzean Textile Solutions Ltd. | Manufacturing | 2004 |
| Cupp Hospitality Ltd | Hospitality | 2024 |
| D Logan Agri Ltd | Agriculture & fishing | 2025 |
| D.D.Z. Marine Limited | Manufacturing | 1990 |
| D.J.Scott Engineering Ltd | Administrative & support | 2013 |
| Dagger Electrics (Ayrshire) Ltd | Construction | 2017 |
| Dalcon Limited | Construction | 2007 |
| Dalfruin Seaside Ltd | Administrative & support | 2021 |
| Dalgarven Homes (Scotland) Limited | Construction | 2009 |
| David Carfray Financial Services Limited | Financial services | 2023 |
| David Munro Financial Services Limited | Financial services | 2008 |
| David O'Neill Associates Limited | Administrative & support | 2017 |
| David Roper Fishing Ltd | Agriculture & fishing | 2022 |
| DB QS Services Limited | Professional & scientific | 2013 |
| DBS Consultancy (Scotland) Ltd | Professional & scientific | 2023 |
| Dchampion Consultants Limited | Administrative & support | 2013 |