| Chemicadence Limited | Professional & scientific | 2025 |
| Cherry Tree Preschool Nursery Ltd | Health & social care | 2025 |
| Christies Buckie Limited | Manufacturing | 2026 |
| Cinecosse Limited | Information & communication | 2003 |
| Circulate Plus Ltd | Professional & scientific | 2021 |
| Cjweld Ltd | Manufacturing | 2023 |
| Clark Mechanical Services Ltd | Manufacturing | 2020 |
| Claymore Electrical Services Limited | Energy | 2007 |
| CLOUD9 Campers Ltd | Other services | 2019 |
| Cluny Events Limited | Other services | 2016 |
| Cluny Farming Partnership | | 2001 |
| Cluny Home Farms Limited | Agriculture & fishing | 1972 |
| Cluny Property Ltd | Real estate | 2023 |
| Cobban Architecture Ltd | Professional & scientific | 2011 |
| Cobracad Solutions Limited | Professional & scientific | 2009 |
| Cococaramel Ltd | Other services | 2022 |
| Coffee & Sports Ltd | Hospitality | 2021 |
| Colin Tough Joinery Limited | Construction | 2002 |
| Coltest Limited | Professional & scientific | 2002 |
| Commander ROV Ltd | Professional & scientific | 2021 |
| Connect Three Consultants Limited | Information & communication | 2018 |
| Connecterra Ltd | Professional & scientific | 2025 |
| Construction Planning Consultant Ltd | Construction | 2017 |
| Core Design (Scotland) Ltd. | Professional & scientific | 2004 |
| Core Technical Services Aberdeen Limited | Professional & scientific | 2020 |
| Cornabo Wind Limited | Energy | 2015 |
| Corsman Properties Limited | Agriculture & fishing | 2004 |
| Corsmanhill Consulting Ltd | Health & social care | 2021 |
| Coull Trees Ltd | Agriculture & fishing | 2021 |
| Courier Services (Scot) Ltd | Transport & logistics | 2025 |
| Coutts Family Investment Limited | Financial services | 2025 |
| Cowleylegal Limited | Professional & scientific | 2020 |
| CPH Fumigation Ltd | Administrative & support | 2020 |
| CPM (Inverurie) Ltd | Professional & scientific | 2017 |
| Crachan Property Lets Ltd | Real estate | 2024 |
| Craftech Consultants Limited | Professional & scientific | 2024 |
| Craig & Beverly Ltd | Other services | 2012 |
| Craigharr Stables Limited | Agriculture & fishing | 2022 |
| Craigmile Joinery Services Ltd. | Construction | 2010 |
| Craigmile Plumbing and Heating Limited | Construction | 2012 |
| Craigmile Properties Limited | Real estate | 2012 |
| Crazyass Prints Ltd | Manufacturing | 2024 |
| Crc-Evans Offshore Limited | Other services | 2006 |
| Create Your Kindspace Ltd | Information & communication | 2022 |
| Creative Partners & Co Ltd | Administrative & support | 2010 |
| CRG Energy Services Ltd | Professional & scientific | 2025 |
| CRG Group Limited | Real estate | 2022 |
| Cross Engineering Solutions Limited | Administrative & support | 2017 |
| Crossland Clan Ltd | Agriculture & fishing | 2023 |
| Crowmec Ltd | Wholesale & retail | 2019 |
| Cruden Cleaning Services Ltd | Administrative & support | 2013 |
| Cruickshank Electrical Services Ltd. | Construction | 2003 |
| Cruickshank Energy (Westerton) Limited | Energy | 2017 |
| CT Harvesting Limited | Agriculture & fishing | 2004 |
| CTH Electrical Offshore Services Ltd | Manufacturing | 2018 |
| CTI Joinery Limited | Manufacturing | 2014 |
| Cuan Design Limited | Arts & recreation | 2005 |
| Cultivate Culture Ltd | Administrative & support | 2025 |
| CYBERMENT2 Limited | Professional & scientific | 2022 |
| D & T D'Arcy Limited | Manufacturing | 2006 |
| D a Gauld Properties Limited | Construction | 2010 |
| D Calder (Builders) Ltd. | Construction | 2000 |
| D Murray Electrical Ltd | Construction | 2013 |
| D&D Tech Limited | Wholesale & retail | 2023 |
| D18 Digital Limited | Information & communication | 2025 |
| Daffie Management Ltd | Administrative & support | 2012 |
| Dalgarno Properties Limited | Administrative & support | 2013 |
| Dandin Ltd | Professional & scientific | 2019 |
| Danu Solutions Ltd | Professional & scientific | 2024 |
| Dara Services Limited | Construction | 2016 |
| Darwin Strategic Search Limited | Administrative & support | 2026 |
| Davah Wood Services Limited | Professional & scientific | 2026 |
| Davidson Wealth Management Limited | Financial services | 2010 |
| Davidsons (Scotland) Limited | Manufacturing | 2009 |
| Davidsons Inverurie Ltd. | Manufacturing | 2006 |
| Daviot Community Trust | Other services | 2008 |
| Davlan Solutions Limited | Professional & scientific | 2020 |
| DB Quality Services Ltd | Professional & scientific | 2012 |
| DCB Drilling Consultant Ltd | Mining & quarrying | 2022 |
| DCJ Contracts Ltd | Construction | 2024 |
| Dcsmm Ltd | Construction | 2024 |
| Decision and Risk Consulting Ltd | Professional & scientific | 2011 |
| Decommissioning Solutions Limited | Professional & scientific | 2018 |
| Deecite Ltd | Information & communication | 2026 |
| Deepminer Limited | Information & communication | 2017 |
| Deevek Ltd | Professional & scientific | 2013 |
| Delta Reliability Limited | Professional & scientific | 2012 |
| Demi Business Limited | Transport & logistics | 2025 |
| DEN Service Limited | Agriculture & fishing | 2024 |
| Denis Tawse Limited | Construction | 2003 |
| Denmore Kitchens Limited | Wholesale & retail | 2002 |
| Detailpipingdesignsolutions Ltd | Professional & scientific | 2024 |
| Dewar Mechanical Services Ltd | Manufacturing | 2024 |
| DEY Coffee Co Ltd | Hospitality | 2023 |
| DFE Services Limited | Professional & scientific | 2023 |
| Dhseq Limited | Administrative & support | 2015 |
| Diack Associates Limited | Professional & scientific | 2005 |
| Diana Muriel Direct Communications Ltd | Information & communication | 2006 |
| Digifabcnc.Com Limited | Professional & scientific | 2013 |
| Dillyhill Investments Limited | Administrative & support | 2015 |