| Crystal Clear Grampian Ltd | Construction | 2013 |
| Crystal Hawk Ltd | Construction | 2025 |
| CS (PVT) Ltd | Wholesale & retail | 2014 |
| CS Autobody Aberdeen Ltd | Wholesale & retail | 2025 |
| CS Facilities Services Ltd | Administrative & support | 2021 |
| CS Marine Ltd | Other services | 2023 |
| CS Plant Hire Ltd | Administrative & support | 2019 |
| CS Rope Access Ltd | Construction | 2025 |
| Csarchitecture Ltd | Construction | 2021 |
| CSH E&I Consultants Ltd | Administrative & support | 2025 |
| CSM Inspections Ltd | Professional & scientific | 2025 |
| CSM Sustainable Energy (Holdings) Ltd | Professional & scientific | 2023 |
| CSP Forestry Limited | Administrative & support | 2003 |
| CSS Aberdeen Limited | Professional & scientific | 2011 |
| CSW Matco Consultants Ltd | Mining & quarrying | 2024 |
| CT Garage Aberdeen Limited | Wholesale & retail | 2020 |
| Ctev Initiative Limited | Health & social care | 2021 |
| CTP Electrical Ltd | Construction | 2024 |
| CTS Corporation U.K. Limited | Professional & scientific | 1984 |
| Cubanhall Limited | Administrative & support | 2000 |
| Cubismo Ltd | Professional & scientific | 2019 |
| Cucina DEI Misto Sapori Ltd | Hospitality | 2025 |
| Cuillin Investments Ltd | Financial services | 2024 |
| Cuillin Ltd | Wholesale & retail | 2024 |
| Culachy Limited | Administrative & support | 2016 |
| Cullen House Gardens Limited | Households | 1984 |
| Culra Ltd | Professional & scientific | 2008 |
| Culsalmond Air Holdings Limited | Financial services | 2014 |
| Culsalmond Air Limited | Energy | 2014 |
| Culsalmond Property & Investment Company Limited | Professional & scientific | 2002 |
| Culter Properties Limited | Real estate | 2010 |
| Cults Consultancy Ltd | Professional & scientific | 2010 |
| Cults Enterprises Ltd | Real estate | 2024 |
| Cults Hospitality Co Limited | Hospitality | 2023 |
| Cults Hotel Limited | Hospitality | 2009 |
| Cults Property Development Company Limited | Construction | 2013 |
| Culture North East Ltd | Arts & recreation | 2025 |
| Culture Technology Limited | Administrative & support | 2025 |
| Culvie Wind (Holdings) Ltd | Energy | 2018 |
| Culvie Wind Limited | Energy | 2015 |
| Culzean Advisory Ltd | Professional & scientific | 2025 |
| Culzean Granite Properties Limited | Real estate | 2026 |
| Cumberland Cathodic Protection Limited | Administrative & support | 2004 |
| Cumming & Co. (Aberdeen) Ltd. | Professional & scientific | 2003 |
| Cumming and Co. (Cove) Limited | Administrative & support | 2012 |
| CUP (Aberdeen) Limited | Hospitality | 2012 |
| CUP Tea Salon Ltd | Hospitality | 2022 |
| CUP@474 Limited | Hospitality | 2023 |
| Cupla Clicks Ltd | Information & communication | 2026 |
| Curaitt Limited | Information & communication | 2024 |
| Cured Click Ltd | Information & communication | 2023 |
| Curio Food Machinery Limited | Manufacturing | 2014 |
| Curl Aberdeen Ltd | Arts & recreation | 2016 |
| Currie Brothers Limited | Construction | 1987 |
| Curry Club Aberdeen Ltd | Hospitality | 2025 |
| Curry Club Ellon Ltd | Hospitality | 2021 |
| Curry Mount Indian Takeway Ltd | Hospitality | 2019 |
| Curry Network Ltd | Hospitality | 2026 |
| Cuseck Engineering Services (Aberdeen) Limited | Professional & scientific | 2007 |
| Custcom Trade LP | | 2014 |
| Custom Couture Ltd | Wholesale & retail | 2024 |
| Custom Project Services Ltd | Other services | 2026 |
| Custom Tuning (Aberdeen) Limited | Wholesale & retail | 2021 |
| Cutting Underwater Technologies Ltd. | Mining & quarrying | 1999 |
| Cvsm Consulting Limited | Professional & scientific | 2016 |
| CW Access Ltd | Construction | 2025 |
| CWC Trading Ltd | Administrative & support | 2024 |
| CWI Applications Ltd | Information & communication | 2021 |
| CWL Drilling Limited | Professional & scientific | 2017 |
| CWM Associates Ltd | Professional & scientific | 2023 |
| CY Treasures Ltd | Hospitality | 2025 |
| Cyan Sentinel Limited | Professional & scientific | 2013 |
| Cyan Squirrel Software Ltd | Information & communication | 2022 |
| Cyan Subsea UK Ltd. | Mining & quarrying | 1994 |
| Cyber DP Tech Ltd | Information & communication | 2025 |
| Cyber Nandhini Ltd | Information & communication | 2025 |
| Cyber News Global Limited | Information & communication | 2023 |
| Cyber Stories Ltd | Information & communication | 2017 |
| Cyberfind Limited | Professional & scientific | 2000 |
| Cyberion Labs Ltd | Information & communication | 2026 |
| Cybersafe Scotland Ltd | Education | 2022 |
| Cybervision Tech Ltd | Information & communication | 2020 |
| Cyclogenix Limited | Professional & scientific | 2007 |
| Cyclone F.O. Services Ltd | Professional & scientific | 2018 |
| Cyclops Enterprises Ltd | Professional & scientific | 2025 |
| Cycy Hair Collections Limited | Administrative & support | 2018 |
| Cygnas Solutions Limited | Mining & quarrying | 2015 |
| Cygnus Enterprises Limited | Education | 2014 |
| Cygnus Foods Limited | Hospitality | 2025 |
| Cygnus Olor Holdings Ltd | Financial services | 2024 |
| Cyme Ltd | Professional & scientific | 2019 |
| Cymee Ltd | Wholesale & retail | 2020 |
| Cyphercrescent UK Limited | Information & communication | 2018 |
| Cyrydiad Limited | Professional & scientific | 2017 |
| D & D Hart Limited | Professional & scientific | 2015 |
| D & D Slating Ltd. | Construction | 2003 |
| D & G Aberdeen Limited | Wholesale & retail | 2004 |
| D & G Nolan Limited | Real estate | 2009 |
| D & JL Limited | Other services | 2009 |
| D a Liston Business Solutions Limited | Professional & scientific | 2014 |