| Chinmay Consultants Ltd. | Administrative & support | 2011 |
| Chris Mitchell Engineering Limited | Professional & scientific | 2016 |
| Christie Johnston Photography Ltd | Professional & scientific | 2024 |
| CIAOBELLA1 Ltd | Hospitality | 2023 |
| Cirque Insight Limited | Professional & scientific | 2024 |
| Citadin Foundations Ltd | Construction | 2025 |
| City of Aberdeen Distillery Ltd | Manufacturing | 2016 |
| CJE Repairs (UK) Ltd | Wholesale & retail | 2020 |
| CJS Well Services Ltd | Professional & scientific | 2020 |
| CKD Consulting Services Ltd | Administrative & support | 2024 |
| Claymore Design & Media Ltd | Professional & scientific | 2022 |
| Clayski Limited | Construction | 1991 |
| Clear Horizon Path Ltd | Information & communication | 2025 |
| Close UP Inspection Ltd | Energy | 2014 |
| Cloud Codero Limited | Information & communication | 2025 |
| Clyde Designers Limited | Professional & scientific | 2007 |
| CM Piping Design Ltd | Professional & scientific | 2019 |
| CMB (Westhill) Developments Ltd | Hospitality | 2019 |
| CMR Tax Advisory Limited | Professional & scientific | 2022 |
| Coast Energy Development Engineering Management Ltd | Professional & scientific | 2022 |
| Coast Media Scotland Ltd | Professional & scientific | 2021 |
| Coffee Partners Limited | Hospitality | 1994 |
| Coffee Text Limited | Wholesale & retail | 2021 |
| Colosseum Fitness (Aberdeen) Ltd | Arts & recreation | 2022 |
| Compass Offshore Catering Limited | Hospitality | 1975 |
| Compass Scottish Site Services Limited | Professional & scientific | 1975 |
| Complete Trade Solutions Limited | Construction | 2017 |
| Completions Engineering Services Limited | Professional & scientific | 2026 |
| Coneyco Energy Services Ltd | Professional & scientific | 2026 |
| Conntrak Catering Limited | Hospitality | 2018 |
| Continuous Marketing Limited | Professional & scientific | 2021 |
| Contlaw Management Ltd | Professional & scientific | 2020 |
| Cool Air Aberdeen Ltd | Construction | 2017 |
| Coralcroft Limited | Professional & scientific | 2000 |
| Coralpeak Systems Ltd | Information & communication | 2020 |
| Cornerhouse Developments Ltd | Real estate | 2009 |
| Cotr Limited | Professional & scientific | 2024 |
| CPA OIL & GAS Consultancy Limited | Professional & scientific | 2011 |
| Craig Banks Limited | Professional & scientific | 2019 |
| Craigs Offshore Services Ltd | Construction | 2022 |
| CRE8 Hair Studio (Portlethen) Limited | Other services | 2019 |
| Crest Glazing Limited | Construction | 1987 |
| Crossaxle Design Limited | Professional & scientific | 2007 |
| Cruden Engineering Limited | Administrative & support | 2010 |
| Cruden Sotto Mare Ltd | Professional & scientific | 2011 |
| CSL Retail Enterprises Limited | Wholesale & retail | 2025 |
| D D Digging Ltd | Construction | 2022 |
| Dalriada Engineering Ltd | Professional & scientific | 2026 |
| Darren James Recruitment Limited | Administrative & support | 2023 |
| Dave Marples Consulting Ltd | Professional & scientific | 2020 |
| Daveduncanrovltd Limited | Professional & scientific | 2020 |
| DC Maintenance Services Limited | Professional & scientific | 2016 |
| DC Orthopaedics Limited | Administrative & support | 2019 |
| Decision Analyze Limited | Professional & scientific | 2015 |
| Decom Mission | Other services | 2009 |
| Deemonte Designs Ltd | Professional & scientific | 2019 |
| Deep Casing Tools Limited | Mining & quarrying | 1999 |
| Deering Joinery Ltd | Construction | 2022 |
| Deeside Distillers Ltd | Manufacturing | 2016 |
| Deesyfer Ltd | Information & communication | 2025 |
| Deet Limited | Professional & scientific | 2011 |
| Delaton Limited | Information & communication | 1998 |
| Devonian Petrophysical QA Services Limited | Professional & scientific | 2013 |
| DH & NW Jackson Ltd | Real estate | 2021 |
| DH & NW Jackson Partnership LLP | | 2021 |
| Diamond Property Developments (8QR) Ltd | Construction | 2023 |
| Diamond Property Developments - 10 NSS Ltd | Real estate | 2022 |
| Diamond Property Developments - Masonic Lodge Limited | Construction | 2018 |
| Diamond Property Developments - RDH Ltd | Construction | 2023 |
| Diamond Property Developments - Spire View Ltd | Real estate | 2019 |
| Diamond Property Developments -78 QR Ltd | Construction | 2023 |
| Diamond Property Developments Ltd | Construction | 2015 |
| Digital Farsight Ltd. | Professional & scientific | 2023 |
| Dignissim Training Limited | Professional & scientific | 2019 |
| Dimbim Properties and Investment Ltd | Mining & quarrying | 2023 |
| Divex Limited | Professional & scientific | 2010 |
| DJ Automotive Engineering Ltd | Wholesale & retail | 2016 |
| DKM Home Improvements Ltd | Wholesale & retail | 2024 |
| DMC (Aberdeen) Design Services Limited | Professional & scientific | 2013 |
| DMC Builders Ltd | Construction | 2024 |
| Doggie Style Ltd | Other services | 2024 |
| Doggy Dudes Ltd | Other services | 2014 |
| Donside Consultants Limited | Professional & scientific | 2003 |
| Downhole Engineering Services Limited | Professional & scientific | 2011 |
| DR Eline Pedersen Limited | Health & social care | 2005 |
| DRI Technologies Ltd | Professional & scientific | 2025 |
| Drum Cabins Ltd | Construction | 2023 |
| DS IT Consultancy Limited | Information & communication | 2018 |
| Dubba Media Limited | Professional & scientific | 2021 |
| Dunbar Events and Marketing Limited | Administrative & support | 2014 |
| Duncan's Tours Scotland Ltd | Administrative & support | 2013 |
| Duncanos Group Limited | Hospitality | 2025 |
| Dundas Shellfish Limited | Agriculture & fishing | 2013 |
| Dundee Ahead Ltd | Professional & scientific | 2024 |
| Dunecht Bar Limited | Hospitality | 2024 |
| Dunecht Diner Ltd | Hospitality | 2020 |
| Dunecht Estates Moorland Management Limited | Administrative & support | 2024 |
| Dunedin Property Development & Leasing Services Ltd | Real estate | 2016 |
| Dunnichen Consultants Limited | Professional & scientific | 1987 |
| Dunnichen Investments Limited | Professional & scientific | 1987 |