| Caffe Monza Paisley Limited | Hospitality | 2025 |
| Caladonia Carbon Credits Limited | Construction | 2024 |
| Caledonia Tyres Ltd | Wholesale & retail | 2024 |
| Calum Watt Landcare & Maintenance Ltd | Administrative & support | 2026 |
| CAM Integration Limited | Manufacturing | 2014 |
| CAM Roofing and Cladding Ltd | Construction | 2025 |
| Cameron Bespoke Interiors Ltd | Construction | 2025 |
| Camerons Hairdressing Limited | Other services | 2026 |
| Campbell Consultancy INT Ltd | Real estate | 2007 |
| Canine Boutique & Spa Limited | Other services | 2026 |
| Canine Cottage Groomers & Spa Limited | Other services | 2026 |
| Carbeth Keepsake Ltd | Arts & recreation | 2012 |
| Carers of West Dunbartonshire Limited | Health & social care | 2007 |
| Carlasolutions Ltd | Construction | 2025 |
| Carlyle's Fine Foods Ltd | Wholesale & retail | 2020 |
| Casa Heating Services Ltd | Construction | 2026 |
| Cassidy Decorators Limited | Construction | 2021 |
| Castlehill Argyll Limited | Hospitality | 2018 |
| Cbdr Letting Ltd | Real estate | 2024 |
| CBH Vehicles Ltd | Wholesale & retail | 2024 |
| CDP Contractors Ltd. | Construction | 2011 |
| CE Services Ltd | Wholesale & retail | 2024 |
| Cedf Limited | Wholesale & retail | 2022 |
| Central CAB Company (Cumbernauld) Limited | Transport & logistics | 2001 |
| Central Coatings Scotland Ltd | Construction | 2022 |
| Centurion FM Ltd | Administrative & support | 2023 |
| Centurion Group Services Limited | Financial services | 2024 |
| Cepm Group Limited | Construction | 2024 |
| CGA Facilities Ltd | Real estate | 2026 |
| Chalmers Street Newsagent Limited | Wholesale & retail | 2018 |
| Champion Dance and Cheer Ltd | Arts & recreation | 2023 |
| Charisma Studio Ltd | Other services | 2014 |
| Charlottes' Flower Dell Ltd | Wholesale & retail | 2010 |
| Chastity Limited | Manufacturing | 2018 |
| Chef Kneads Ltd | Hospitality | 2023 |
| Children of the World Ltd | Extraterritorial | 2025 |
| Chilli Grill Ltd | Hospitality | 2025 |
| CHS Care (E) Ltd. | Health & social care | 2021 |
| Circcare Environmental C.I.C. | Professional & scientific | 2025 |
| Cirkis Dancewear Limited | Manufacturing | 2018 |
| City Haven Exquisite Ltd | Real estate | 2024 |
| Claire White Consulting Limited | Professional & scientific | 2024 |
| Clan Chemists Limited | Wholesale & retail | 1961 |
| Classic Nail Salon Ltd | Other services | 2020 |
| Cleaning Solutions Scotland Limited | Other services | 2020 |
| Cleantronic Ltd | Administrative & support | 2021 |
| Clmc Developments Ltd | Construction | 2024 |
| Cloda Killen Beauty Ltd | Other services | 2026 |
| Cloud 9 Yoga Ltd | Arts & recreation | 2016 |
| Clyde Accounting Solutions Ltd | Professional & scientific | 2019 |
| Clyde Alpha Fabrication Services Ltd | Manufacturing | 2016 |
| Clyde Architectural Drafting Ltd | Professional & scientific | 2026 |
| Clyde Associated Engineers, Limited | Manufacturing | 1952 |
| Clyde Barber Ltd | Other services | 2026 |
| Clyde BED Centre Ltd | Wholesale & retail | 2018 |
| Clyde Car Sales Limited | Wholesale & retail | 2016 |
| Clyde Cleaners Limited | Other services | 2017 |
| Clyde Commercial Diving Ltd | Construction | 2016 |
| Clyde Controls Ltd. | Construction | 2008 |
| Clyde Decorating & Painting Ltd | Construction | 2017 |
| Clyde Defence Lawyers Ltd | Professional & scientific | 2014 |
| Clyde Heating Ltd | Construction | 2025 |
| Clyde Hyperspectral Imaging and Technology Limited | Manufacturing | 2020 |
| Clyde Marine Training Limited | Education | 1986 |
| Clyde NET Zero Group Ltd | Construction | 2024 |
| Clyde Network Testing Ltd | Information & communication | 2022 |
| Clyde Night Events Limited | Real estate | 2024 |
| Clyde Perichicken Ltd | Hospitality | 2024 |
| Clyde Property Buyers Ltd | Real estate | 2025 |
| Clyde Sausage Company Limited | Manufacturing | 2016 |
| Clyde Shopmobility | Other services | 2003 |
| Clyde Travel Limited | Administrative & support | 1988 |
| Clydebank Accident Repair Centre Limited | Wholesale & retail | 2021 |
| Clydebank and District Taxi Owners Association Radio System Limited | Transport & logistics | 1977 |
| Clydebank Autos Ltd | Wholesale & retail | 2020 |
| Clydebank Business Centre LLP | | 2024 |
| Clydebank Car and Taxi Repairs Ltd | Manufacturing | 2016 |
| Clydebank Car Sales Ltd | Wholesale & retail | 2020 |
| Clydebank Car Wash Limited | Other services | 2022 |
| Clydebank Community Sports Hub | Arts & recreation | 2013 |
| Clydebank Cuisine Ltd | Hospitality | 2023 |
| Clydebank Decorators Ltd | Construction | 2026 |
| Clydebank Engineering and Fabrication Limited | Manufacturing | 2009 |
| Clydebank Estate Agents Ltd | Real estate | 2025 |
| Clydebank Estate and Lettings Agents Ltd | Real estate | 2025 |
| Clydebank Fadecut Ltd | Other services | 2024 |
| Clydebank Financial Services Ltd | Professional & scientific | 2002 |
| Clydebank Grocers Ltd | Wholesale & retail | 2019 |
| Clydebank Installations Limited | Construction | 2012 |
| Clydebank Motor Repair Ltd | Wholesale & retail | 2025 |
| Clydebank Municipal Bank Limited | Financial services | 1921 |
| Clydebank Style Ltd | Other services | 2020 |
| Clydebank Usave Ltd | Wholesale & retail | 2019 |
| Clydebank Warehouse and Distribution Centre Limited Limited | Transport & logistics | 2023 |
| Clydebankbridge Limited | Information & communication | 2023 |
| Clydebedcentre Clearance Ltd | Wholesale & retail | 2026 |
| Clydebuilt Lettings Ltd | Real estate | 2018 |
| Clydehome Ltd | Wholesale & retail | 2025 |
| Clydeside Plumbing & Heating Ltd | Construction | 2023 |
| Clydeside Property Maintenance Ltd | Manufacturing | 2018 |