| Consilium Company One Limited | Construction | 2023 |
| Consilium Contracting Services Ltd | Construction | 2014 |
| Consilium Holding Group Limited | Construction | 2023 |
| Consilium Plumbing & Heating Ltd | Construction | 2023 |
| Construction Estimators Ltd | Real estate | 2011 |
| Consultant QS Ltd | Professional & scientific | 2018 |
| Contact Industrial Cleaning Ltd | Administrative & support | 2014 |
| Contour Contract Services Ltd | Administrative & support | 2019 |
| Conturo Ltd | Construction | 2013 |
| Cooper 7 Ltd | Professional & scientific | 2025 |
| Coorie & Stone Limited | Construction | 2026 |
| Coorie Psychology Ltd | Education | 2026 |
| Coorie Retreats Ltd | Hospitality | 2022 |
| Copperface Ltd | Information & communication | 2020 |
| Core 2 Computing Ltd | Other services | 2021 |
| Core Cloud Ltd | Information & communication | 2021 |
| Corinne Moffat Photography Ltd | Professional & scientific | 2024 |
| Corps Monitoring Limited | Information & communication | 1999 |
| Corrigan Interiors (Paisley) Ltd | Construction | 2025 |
| Cosh Education Consultancy Limited | Education | 2020 |
| Cost Sale Ltd | Wholesale & retail | 2025 |
| Cosy Casa Ltd | Real estate | 2026 |
| Cosy Nest Garden Rooms Ltd | Manufacturing | 2025 |
| Coughlin Technical Services Ltd | Administrative & support | 2012 |
| Counselling & Coaching Solutions Limited | Administrative & support | 2014 |
| Cove Farm Glamping Ltd | Hospitality | 2025 |
| Coverstitch Limited | Other services | 2007 |
| Cowie & Co Accountants Ltd | Professional & scientific | 2025 |
| CP Paisley Foods Ltd | Hospitality | 2025 |
| CP Roofing Solutions Ltd | Construction | 2017 |
| Craa Ltd | Wholesale & retail | 2024 |
| Craigalan Controls Limited | Construction | 2004 |
| Craigalan EOT Limited | Construction | 2020 |
| Craigalan Group Ltd | Construction | 2017 |
| Crane and Machine Limited | Other services | 2013 |
| Crazy Capers Limited | Health & social care | 2007 |
| CRD International Transport Ltd. | Transport & logistics | 2003 |
| CRE8IVE Signs & Graphics Limited | Professional & scientific | 2016 |
| Creating Wealth Ltd | Extraterritorial | 2019 |
| Creations Mart Ltd | Wholesale & retail | 2018 |
| Creationware Ltd. | Information & communication | 2020 |
| Creative Renfrewshire | Education | 2018 |
| Crispy Chip Limited | Real estate | 1985 |
| Crob Contracts Ltd | Professional & scientific | 2025 |
| Croftlee Properties Ltd | Real estate | 2023 |
| Crossburn Investments Limited | Administrative & support | 2013 |
| Crossfit Paisley Ltd | Arts & recreation | 2022 |
| Crosshouse Children’S Fund | Other services | 2022 |
| Crowdglow Ltd | Information & communication | 2016 |
| Crowdkind Limited | Information & communication | 2026 |
| Crown Logic Ltd | Professional & scientific | 2025 |
| Cruachan Superconductors Ltd | Professional & scientific | 2025 |
| Crystal Clear Aesthetics Ltd | Other services | 2019 |
| CS Mackenzie Holdings Ltd | Professional & scientific | 2019 |
| Cscs:Sports, Physiotherapy and Education Limited | Education | 2017 |
| CSM Civils Ltd. | Construction | 2023 |
| Csmr Electrical Services Ltd | Construction | 2020 |
| CTM Auto 2023 Limited | Wholesale & retail | 2023 |
| Cuil Assets Ltd | Financial services | 2024 |
| Cuil Developments Ltd | Construction | 2020 |
| Cuil Seafood Ltd | Hospitality | 2023 |
| Cultureelevate Ltd | Professional & scientific | 2025 |
| Cumbrae Supply Company Limited | Wholesale & retail | 2006 |
| Cunnea Limited | Administrative & support | 2023 |
| Curry Scot Ltd | Hospitality | 2026 |
| Curtain Workshop Ltd | Manufacturing | 2016 |
| Curtainwise (Scotland) Ltd. | Manufacturing | 2003 |
| CW Building Contracts Ltd | Construction | 2023 |
| Cyberhare Solutions Ltd | Information & communication | 2025 |
| D & G Carpentry and Joinery Ltd | Construction | 2026 |
| D & G Drainage Ltd. | Construction | 2003 |
| D & M Footwear Enterprise Ltd | Wholesale & retail | 2015 |
| D 2 Corporate Solutions Limited | Financial services | 2002 |
| D Adams IT Solutions Ltd | Information & communication | 2019 |
| D Morrison Finance Ltd | Financial services | 2020 |
| D P Lighting Consultants Limited | Real estate | 1993 |
| D Percival Engineering Limited | Manufacturing | 2025 |
| D S Supplies Limited | Hospitality | 2015 |
| D Semple Contractors Limited | Construction | 2009 |
| D&L Rose Ltd | Hospitality | 2024 |
| D&S Pubs Ltd | Hospitality | 2026 |
| D. Hamilton Plumbing & Electrical Services Ltd | Wholesale & retail | 2004 |
| D.D.I. Services Ltd | Professional & scientific | 2015 |
| D.M.C. Transportation Limited | Transport & logistics | 2006 |
| D.Mccomish Services Ltd | Construction | 2025 |
| D.T.B. Painting & Decorating Limited | Construction | 2012 |
| D.W. Parker Limited | Transport & logistics | 2003 |
| D2 Financial Solutions (UK) Limited | Financial services | 2009 |
| D3 Direct Travel Ltd | Transport & logistics | 2025 |
| Daisy Fresh Ltd | Administrative & support | 2025 |
| Daisy's Florist Limited | Wholesale & retail | 2019 |
| Daisydoom Limited | Arts & recreation | 2018 |
| Dalmarnock Productions Ltd | Information & communication | 2011 |
| Dalriada Golf Tours Ltd | Administrative & support | 2026 |
| Dalriada Group Limited | Real estate | 2023 |
| Dalry Biro Ltd | Wholesale & retail | 2021 |
| Dana Facial Aesthetics Ltd | Other services | 2023 |
| Daniel Fabrications Ltd | Other services | 2017 |
| Dapper Ground Maintenance Ltd | Other services | 2019 |
| Darciw Limited | Hospitality | 2021 |