| Chalmers Construction Consultants Ltd | Real estate | 2019 |
| Chalmers Transmissions Limited | Wholesale & retail | 2013 |
| Changeforge Limited | Hospitality | 1993 |
| Check YOU Limited | Extraterritorial | 2015 |
| Cherry Blossom Children’S Residential Home Ltd | Health & social care | 2020 |
| Cherryblossom (Ellon) Limited | Hospitality | 2022 |
| Cherrytree (North East) Limited | Other services | 2016 |
| Chico's Grill Ltd | Hospitality | 2024 |
| Choice Carpets Ltd. | Wholesale & retail | 2003 |
| Choice Properties (Peterhead) Limited | Real estate | 2022 |
| Christian Scott Limited | Wholesale & retail | 1988 |
| Christom Ltd | Professional & scientific | 2017 |
| Christopher Hocking Limited | Construction | 2022 |
| CJR Fishing Ltd | Agriculture & fishing | 2025 |
| Ckmcl Logistics Ltd | Transport & logistics | 2026 |
| Clara House Ltd. | Hospitality | 2010 |
| Clara House PHD Ltd | Wholesale & retail | 2013 |
| Classy Cleaning Crew LLP | | 2021 |
| Cleaton Services Ltd | Agriculture & fishing | 2017 |
| Clola Properties Ltd. | Real estate | 2011 |
| Cloud City Ltd | Professional & scientific | 2024 |
| Cloverfield on the Quarry Ltd | Agriculture & fishing | 2018 |
| CLS Marine Ltd | Agriculture & fishing | 2012 |
| CO2 Recovery Ltd | Manufacturing | 2022 |
| Cobban Metering Ltd | Mining & quarrying | 2013 |
| Cobra Fabrication Limited | Manufacturing | 2015 |
| Cock & Bull Country Inns Limited | Hospitality | 1996 |
| Coldwells of Hillhead Ltd | Agriculture & fishing | 2026 |
| Collieburn Properties Ltd | Households | 2025 |
| Colquhoun Compliance Ltd | Professional & scientific | 2022 |
| Comfort Fishing Company Limited | Other services | 2012 |
| Compass MBA Ltd | Administrative & support | 2011 |
| Concade Ltd | Information & communication | 2024 |
| Consortium PD174 Ltd | Agriculture & fishing | 2016 |
| Cooper HR Ltd | Administrative & support | 2021 |
| Cooper R.C. Limited | Agriculture & fishing | 2006 |
| Core HQ CIC | Arts & recreation | 2026 |
| Corinnes Ltd | Agriculture & fishing | 2011 |
| Cottontail & Whiskers Ltd | Wholesale & retail | 2022 |
| Cowie Seafoods Limited | Manufacturing | 1998 |
| Coyote Landscape & Building Renovation Ltd | Construction | 2021 |
| CPM (Peterhead) Ltd | Professional & scientific | 2025 |
| Crackan View Properties Ltd | Real estate | 2025 |
| Craig a Wright Electrical Ltd | Construction | 2018 |
| Craig Yeomans Limited | Manufacturing | 2025 |
| Craigdon Mountain Sports (Inverurie) Limited | Other services | 2014 |
| Craighead Farms | | 1998 |
| Craigston Tyres Ltd. | Wholesale & retail | 2006 |
| Crichie Diving Limited | Other services | 2019 |
| Crieff Vape Shop Ltd | Wholesale & retail | 2026 |
| Crimond Charitable Trust | Health & social care | 2010 |
| Crimond Garage Limited | Wholesale & retail | 2015 |
| Crimond Track Shop Limited | Arts & recreation | 2003 |
| Cromarty Fishing Company Limited | Agriculture & fishing | 2022 |
| Cross Contracting Ltd | Professional & scientific | 2019 |
| CRS Helicopters Ltd | Professional & scientific | 2025 |
| Cruden Bay Garage Ltd | Wholesale & retail | 2018 |
| Cruden Bay Plastering Ltd. | Construction | 2000 |
| Cruden Bay Shellfish Ltd | Agriculture & fishing | 2017 |
| Cruden Bay Training Limited | Wholesale & retail | 2014 |
| Crudens Limited | Construction | 2008 |
| Cruickshank Support Services Ltd | Mining & quarrying | 2023 |
| Cruickshanks Joinery Ltd. | Construction | 2011 |
| CSC Promotions Limited | Arts & recreation | 1999 |
| CSC Property Limited | Real estate | 2022 |
| CSK Gifts Ltd | Wholesale & retail | 2018 |
| Cullens Fresh Food Ltd | Other services | 2016 |
| Cumming Farming Ltd | Agriculture & fishing | 2022 |
| Cunningham Plastering Ltd | Construction | 2009 |
| Current Commercials Limited | Wholesale & retail | 2019 |
| CUT Cost Carpets Ltd. | Administrative & support | 2002 |
| Cvln Limited | Wholesale & retail | 2020 |
| CWO (Peterhead) Ltd | Agriculture & fishing | 2019 |
| CWS Joinery Limited | Construction | 2018 |
| CWW Electrical Ltd | Construction | 2015 |
| D & D E Sutherland LLP | | 2019 |
| D & J Buchan Services Ltd. | Professional & scientific | 2010 |
| D Callaghan WS Ltd | Mining & quarrying | 2023 |
| D J C Strachan Joinery Ltd | Construction | 2020 |
| D Sutherland Support Services Ltd | Administrative & support | 2022 |
| D.R. Welding Services Ltd. | Construction | 1997 |
| D.S.C. (Aberdeen) Limited | Administrative & support | 2007 |
| D7 Investments Ltd | Professional & scientific | 2011 |
| Daily JOB Ltd | Administrative & support | 2018 |
| Daingnich Limited | Administrative & support | 2016 |
| Dales 2002 Limited | Manufacturing | 2002 |
| Dales Engineering Services Limited | Manufacturing | 1987 |
| Dalescot Limited | Real estate | 2006 |
| DAN MOR Developments Limited | Agriculture & fishing | 2007 |
| Dance Joy Studio Ltd | Arts & recreation | 2019 |
| Daniel a J Limited | Wholesale & retail | 2026 |
| Danirit Fishing Ltd | Agriculture & fishing | 2019 |
| Darkside Drilling Limited | Mining & quarrying | 1999 |
| DAS Horizon Ltd | Professional & scientific | 2025 |
| Dateon International Ltd | Administrative & support | 2015 |
| David Bremner Services Ltd. | Manufacturing | 2002 |
| David Buchan Marine Ltd | Agriculture & fishing | 2019 |
| David Killoh Meat Co. Ltd. | Wholesale & retail | 2006 |
| David Mckay Brown (Gunmakers) Limited | Manufacturing | 1985 |
| Davidson Properties Limited | Real estate | 1996 |