| Cjaye Consulting Ltd | Financial services | 2019 |
| CKD Developments Ltd | Construction | 2014 |
| Cklj Consulting Ltd | Information & communication | 2018 |
| Clan Care the Firs Ltd | Health & social care | 2015 |
| Clann Trading Ltd | Wholesale & retail | 2026 |
| Clansman Executive Chauffeur Ltd | Transport & logistics | 2026 |
| Clanvale Ltd | Real estate | 1997 |
| Clarawara Investments Limited | Real estate | 2007 |
| Clarkston Hair Co Limited | Other services | 2012 |
| Classic Car & Commercial Ltd | Wholesale & retail | 2025 |
| Classic Carpets and Flooring (Scotland) Limited | Other services | 2011 |
| Classymart Limited | Wholesale & retail | 2024 |
| Clean Co Scotland Ltd | Administrative & support | 2022 |
| Clean Machine Scotland Limited | Administrative & support | 2008 |
| Clean Slate Roofing Services Ltd | Construction | 2022 |
| Cleancare Cleaning & Hygiene Limited | Administrative & support | 2018 |
| Clearfield Construction Limited | Construction | 2001 |
| Cleland Contracts Ltd | Construction | 2024 |
| Clelland Property Developments Ltd | Real estate | 2025 |
| Clieo Metals Limited | Wholesale & retail | 2021 |
| Cling on Rope Access Ltd | Administrative & support | 2012 |
| Clinic INK Ltd | Wholesale & retail | 2023 |
| Clinic Muse Academy Ltd | Other services | 2026 |
| Clinic Muse Limited | Other services | 2024 |
| CLR Systems Ltd | Information & communication | 2016 |
| Clrc Consulting Limited | Professional & scientific | 2025 |
| Clyde Compost Ltd | Wholesale & retail | 2024 |
| Clyde Decking and Joinery Ltd | Construction | 2026 |
| Clyde Electrical Ltd | Manufacturing | 2021 |
| Clyde Financial Ltd | Financial services | 2023 |
| Clyde Security Systems Ltd | Administrative & support | 2021 |
| Clyde Valley Dental Practice Limited | Health & social care | 2014 |
| Clyde Valley Holdings Limited | Real estate | 2002 |
| Clyde Valley Water Limited | Hospitality | 2003 |
| CM Beauty Training Ltd | Professional & scientific | 2022 |
| CM Comercial Services Ltd | Wholesale & retail | 2024 |
| CM Window Cleaning Services Limited | Administrative & support | 2025 |
| Cmis Properties Ltd | Real estate | 2018 |
| CMM Commissioning & Completions Ltd | Professional & scientific | 2017 |
| CMS Food and Drink Limited | Hospitality | 2020 |
| CND Electrical Ltd | Construction | 2025 |
| Cngz Limited | Other services | 2023 |
| CNN Administration Limited | Administrative & support | 2021 |
| Coach House (Edinburgh) Ltd | Other services | 2019 |
| Coatbridge Engineering Ltd. | Professional & scientific | 1996 |
| Coatbridge Property and Investment Company Limited | Real estate | 1946 |
| Coconut Holidays Ltd. | Administrative & support | 2000 |
| Colin Kane Limited | Health & social care | 2013 |
| Collaborative Consulting Limited | Information & communication | 2009 |
| Collins D Limited | Wholesale & retail | 2021 |
| Colville Interiors Ltd | Manufacturing | 2025 |
| Communication Strategies Ltd | Information & communication | 2010 |
| Communications Global Network Services Limited | | 2001 |
| Communikat Limited | Education | 2015 |
| Community Volunteers Enabling YOU Ltd. | Health & social care | 1999 |
| Companion Horse Network Limited | Information & communication | 2025 |
| Compass Aviation Solutions Limited | Professional & scientific | 2023 |
| Completomics Limited | Professional & scientific | 2022 |
| COMPUTERS4U (Wishaw) Limited | Information & communication | 2004 |
| Computersciencementors Ltd | Information & communication | 2024 |
| Concept Installations Ltd | Construction | 2022 |
| Concept Management Systems International Limited | Professional & scientific | 1994 |
| Conlon Cleaning Services Ltd | Administrative & support | 2024 |
| Connect Catering (Hamilton) Ltd | Hospitality | 2023 |
| Connexpay UK Ltd | Financial services | 2021 |
| Conor O'Malley Ltd | Health & social care | 2009 |
| Construction Parts & Equipment Limited | Real estate | 1995 |
| Construction Scotland Limited | Administrative & support | 2011 |
| Construction Waste Disposal Ltd | Transport & logistics | 2024 |
| Consult Jhjc Ltd | Professional & scientific | 2022 |
| Consult MCR2024 Ltd | Professional & scientific | 2024 |
| Consult ZAK Ltd | Professional & scientific | 2019 |
| Contacts & Specs Direct Ltd. | Professional & scientific | 2005 |
| Contacts & Specs Holdings Ltd | Professional & scientific | 2014 |
| Container World Limited | Administrative & support | 2009 |
| Contour Paving & Driveways Limited | Administrative & support | 2020 |
| Controldec Media Limited | Arts & recreation | 2023 |
| Controlmax Limited | Manufacturing | 2003 |
| Conveyorworks Ltd | Manufacturing | 2011 |
| Conyers Trust Company (Bermuda) Limited | | 2023 |
| Cool Coatings Ltd | Manufacturing | 2022 |
| Coolco Ltd. | | 2024 |
| Cooper Architects Limited | Professional & scientific | 2008 |
| Coorie Glasgow Ltd | Wholesale & retail | 2024 |
| Copleston Chiro Limited | Health & social care | 2017 |
| Coppen Limited | Health & social care | 2021 |
| Copula Corporate Finance Limited | Professional & scientific | 2015 |
| COR AD COR Ltd | Professional & scientific | 2019 |
| Coral Sea Private Trust Company Ltd | | 2023 |
| Corbyn Property Investments Ltd | Real estate | 2019 |
| Core Accounting Limited | Professional & scientific | 2016 |
| Core Consultants (Immigration & Study Abroad) Limited | Real estate | 2021 |
| Core Squared Construction Limited | Manufacturing | 2025 |
| Coregenrecruitment Ltd | Administrative & support | 2025 |
| Corestone Properties Falkirk Ltd | Households | 2026 |
| Cornerstone Wellbeing Limited | Health & social care | 2026 |
| Cornhills Farm Ltd | Agriculture & fishing | 2022 |
| Cornhills Holding Limited | Agriculture & fishing | 2024 |
| Cosmic Balloons Ltd | Arts & recreation | 2025 |
| Counselling With Karen M Limited | Health & social care | 2025 |