| Carty and Mitchell Ltd | Professional & scientific | 2025 |
| Carty Tileworks Limited | Professional & scientific | 1943 |
| Carty's Bakery Ltd | Manufacturing | 2018 |
| Carumbe LP | | 2020 |
| Carvall Management Limited | Extraterritorial | 2009 |
| Carvia Ltd | Wholesale & retail | 2026 |
| Carwash Edin Limited | Administrative & support | 2024 |
| Cary & Co Developments Limited | Real estate | 2024 |
| Carzoon Automotive Ltd | Information & communication | 2026 |
| CAS (EBT) Limited | Professional & scientific | 2013 |
| CAS PAR CAS Scotland Ltd | Manufacturing | 2016 |
| Casa Angelina Ltd | Manufacturing | 2013 |
| Casa Bonnifer Limited | Professional & scientific | 2004 |
| Casa Complete Limited | Real estate | 2009 |
| Casa DE LA Pasta Ltd | Manufacturing | 2026 |
| Casa Edin Ltd | Transport & logistics | 2022 |
| Casa Manzil Limited | Real estate | 2025 |
| Casa Nostra Scotland Ltd | Real estate | 2015 |
| Casa Subsea Engineering Limited | Professional & scientific | 2005 |
| Casa Tejon Limited | Other services | 2023 |
| Casaberetta Investments Limited | Real estate | 2019 |
| Casas Kadap Ltd | Hospitality | 2025 |
| Casc Whisky Ltd | Wholesale & retail | 2024 |
| Cascade Alliance LP | | 2015 |
| Cascade Assets LP | | 2014 |
| Cascade International LP | | 2015 |
| Cascateks Industries LP | | 2014 |
| Cascavel LP | | 2003 |
| Casco Organisation L.P. | | 2011 |
| Case Management Services Limited | Health & social care | 1988 |
| Casehub Limited | Wholesale & retail | 2024 |
| Casey Joinery Ltd. | Construction | 2017 |
| Casf V Investments 2 LP | | 2025 |
| Casf V Investments GP LLP | | 2025 |
| Cash for Chances Competitions Limited | Arts & recreation | 2025 |
| Cash Makers LP | | 2015 |
| Cashbackapp UK LP | | 2017 |
| Cashel Representation Limited | Other services | 2019 |
| Cashel Travel Trustees Limited | Other services | 2025 |
| Cashire Development LP | | 2012 |
| Cashmore General Steels Limited | Extraterritorial | 1935 |
| Casillero LP | | 2016 |
| Casioleta SP | | 2003 |
| Casjaylia Services Ltd | Administrative & support | 2026 |
| Cask Flow Limited | Administrative & support | 2025 |
| Cask Smugglers Ltd | Hospitality | 2020 |
| Caske Ltd | Real estate | 2026 |
| Caskly Ltd | Information & communication | 2026 |
| Casknoir Ltd | Wholesale & retail | 2025 |
| Casks of Significance Limited | Wholesale & retail | 2004 |
| Caskshare (Scotland) Limited | Wholesale & retail | 2015 |
| Caspar Holdings Limited | Real estate | 2020 |
| Caspar Schneider Heritage Industrial Supply Company LP | | 2015 |
| Casper United LP | | 2014 |
| Caspian Energy Group | | 1994 |
| Caspian Marine Service S.A. Limited | Professional & scientific | 2019 |
| Caspian Rail Logistics LP | | 2016 |
| Caspian Standard Co LP | | 2013 |
| Caspian Support Solutions Services Ltd | Hospitality | 2001 |
| Caspian Trade SLP | | 2003 |
| Cassidy Assets LP | | 2013 |
| Cassillis Investment Management Limited | Real estate | 2021 |
| Cassis Group LP | | 2019 |
| Cassley Event Marketing Limited | Professional & scientific | 1994 |
| Cast Consultancy Limited | Information & communication | 1995 |
| Cast International Limited | Administrative & support | 2019 |
| Cast TV Ltd | Information & communication | 2025 |
| Casteal Science and Technology Ltd | Professional & scientific | 2025 |
| Castello Wholesale Ltd | Wholesale & retail | 2025 |
| Castellum Group Limited | Transport & logistics | 2021 |
| Castelnovo SP | | 2003 |
| Castfield Partners L.P. | | 2015 |
| Castillo Productions LP | | 2016 |
| Castilum Ltd | Transport & logistics | 2025 |
| Casting Connect Limited | Wholesale & retail | 2025 |
| Casting Cred Ltd | Information & communication | 2006 |
| Castlake Company LP | | 2014 |
| Castle Apartments Edinburgh Limited | Real estate | 2024 |
| Castle Assets Limited | Real estate | 2016 |
| Castle Bell Investments L.P. | | 2014 |
| Castle Care 24/7 Ltd | Other services | 2018 |
| Castle Cars Edinburgh Ltd | Transport & logistics | 2025 |
| Castle Chemicals Ltd. | Wholesale & retail | 1995 |
| Castle Craig Investments Limited | Real estate | 2013 |
| Castle Day Group LP | | 2016 |
| Castle Douglas Investment Trading (Scotland) Partnership SP | | 2022 |
| Castle European Limited | Professional & scientific | 2022 |
| Castle Foods Store Ltd | Wholesale & retail | 2018 |
| Castle G.C. Limited | Hospitality | 2025 |
| Castle Hotel Management Company Limited | Hospitality | 2008 |
| Castle Import-Export Holding LP | | 2018 |
| Castle Import-Export L.P. | | 2012 |
| Castle Investments Worldwide L.P. | | 2012 |
| Castle Knight Global LP | | 2015 |
| Castle Mortgage Advice Ltd | Financial services | 2018 |
| Castle Motorhomes Limited | Administrative & support | 2025 |
| Castle Mount a LP | | 2017 |
| Castle Mount Impact Partners FP LP | | 2021 |
| Castle Mount Impact Partners GP LLP | | 2021 |
| Castle Mount LP | | 2016 |