| Cotswold Garden Landscapes Limited | Construction | 2019 |
| Cotswold Golf Limited | Wholesale & retail | 1919 |
| Cotswold Green Construction Limited | Construction | 2014 |
| Cotswold Greenscapes Ltd | Construction | 2025 |
| Cotswold Motoring Services Limited | Extraterritorial | 2014 |
| Cotswold Property Management Ltd | Real estate | 2020 |
| Cotswold Property Partnership Limited | Real estate | 2013 |
| Cotswold Space Agency Limited | Real estate | 2013 |
| Cotswold Vale Refrigeration Limited | Manufacturing | 2004 |
| Cotswold Vapour Ltd | Manufacturing | 2017 |
| Cotswold Wills and Estates Ltd | Professional & scientific | 2026 |
| Cotswolds Wind Academy Global Limited | Administrative & support | 2024 |
| Court Farm Mews Management Company Limited | Households | 1993 |
| Cramond Consulting Limited | Professional & scientific | 2025 |
| Creaative Photography Limited | Professional & scientific | 2024 |
| Creative Sheep Ltd | Information & communication | 2005 |
| Crekid Limited | Information & communication | 2025 |
| Cress Green Legal Services Limited | Professional & scientific | 2019 |
| Crick Solar Limited | Energy | 2022 |
| Criscon&Delivery Ltd | Construction | 2024 |
| Cristom Construction Limited | Construction | 1977 |
| Crown Lane Battery Storage Limited | Energy | 2022 |
| Crozer Electrical Ltd | Construction | 2022 |
| Cruach Wind Farm Limited | Energy | 2022 |
| Crypto Mill Ltd | Financial services | 2021 |
| CSC Project Management Services Limited | Construction | 2016 |
| CSE AIS Ltd | Information & communication | 2024 |
| CSW Cars Ltd | Wholesale & retail | 2022 |
| CTM Wildlife Ltd. | Professional & scientific | 2010 |
| Curtis Developments (Cotswolds) Limited | Construction | 2009 |
| Cuttlehill Battery Storage Limited | Administrative & support | 2018 |
| Cw.Controlsystems Ltd | Information & communication | 2023 |
| Cygnus Agri Ltd | Agriculture & fishing | 2025 |
| Cyril Austin & Sons Ltd. | Wholesale & retail | 2000 |
| D Allin Consulting Limited | Information & communication | 2018 |
| D C S (Bristol) Limited | Wholesale & retail | 2006 |
| D W Ironmongery Limited | Wholesale & retail | 2012 |
| D.E. Spencer & Sons (UK) Limited | Construction | 1994 |
| Dairy Partners (Cymru Wales) Limited | Manufacturing | 2013 |
| Dairy Partners Limited | Manufacturing | 1994 |
| Dangerfield Inns Ltd | Hospitality | 2018 |
| Daniel Stewart Architectural Services Limited | Professional & scientific | 2014 |
| Daniels TV and Domestic Appliances Ltd | Wholesale & retail | 2026 |
| Daniels TV Limited | Wholesale & retail | 2004 |
| Danny Barnes DRY Lining Limited | Construction | 2007 |
| Dantyllew Wings Limited | Real estate | 2022 |
| Darkcorp Ltd | Information & communication | 2026 |
| Datagenic Limited | Information & communication | 2002 |
| Datasafe CTO Limited | Information & communication | 2025 |
| Dave Boon Limited | Information & communication | 2024 |
| Dave Jones Power Engineering Limited | Professional & scientific | 2014 |
| Davenport Contracting Limited | Administrative & support | 2019 |
| David Baxter & Sons Limited | Construction | 2003 |
| David Holpin (Farms) Limited | Agriculture & fishing | 1997 |
| Davis Electrical (Stroud) Ltd | Construction | 2021 |
| Davotech Ltd | Wholesale & retail | 2024 |
| Dayford Designs Limited | Professional & scientific | 2003 |
| DB Compliance Ltd | Professional & scientific | 2016 |
| Deanfern Limited | Real estate | 2000 |
| Debbie-B Limited | Manufacturing | 2009 |
| Delfina Limited | Real estate | 2020 |
| Delta Nine IT Ltd | Wholesale & retail | 2013 |
| Delta Precision Limited | Manufacturing | 2004 |
| Denovo Tech Limited | Information & communication | 2020 |
| Dentishri Limited | Health & social care | 2025 |
| Dents Hall Battery Storage Limited | Energy | 2022 |
| Dentsply IH Limited | Wholesale & retail | 1980 |
| Depth Technologies Ltd | Information & communication | 2024 |
| DEV Carpets & Flooring Ltd | Construction | 2026 |
| Dexfire Limited | Public administration | 2022 |
| Digital Real Estate Technologies Ltd | Information & communication | 2018 |
| Direct Colour (UK) Ltd | Manufacturing | 2009 |
| Direct Colouring (UK) Limited | Manufacturing | 2014 |
| Direct Works Glazing Solutions Ltd | Construction | 2024 |
| Disability Grants Ltd | Wholesale & retail | 2014 |
| Discerning Eyewear Limited | Wholesale & retail | 2022 |
| Discobeat Software Limited | Information & communication | 2003 |
| Diversity Environmental Consultants Limited | Professional & scientific | 2007 |
| DK Planning & Development Limited | Professional & scientific | 2011 |
| DKL SFS and Cladding Services Limited | Information & communication | 2014 |
| DKM Estates Limited | Real estate | 2015 |
| DKM Sheet Metal Company Limited | Manufacturing | 1984 |
| DM Gardner Brickwork Limited | Construction | 2023 |
| Dmtmc Limited | Financial services | 2019 |
| Dmtmc Properties Limited | Real estate | 2024 |
| Dojo Construction Limited | Construction | 2023 |
| Dotloe Cars Limited | Wholesale & retail | 2002 |
| Down to Earth Gloucestershire CIC | Administrative & support | 2014 |
| DP Property Maintenance Ltd | Construction | 2018 |
| Drake Consulting Ltd | Other services | 2026 |
| Dreamerz LAB Ltd | Professional & scientific | 2026 |
| Drilling Information Limited | Professional & scientific | 2008 |
| Driving Masters Solutions Ltd | Education | 2024 |
| Dtutor Ltd | Information & communication | 2023 |
| Dudbridge Estates,Limited(The) | Real estate | 1933 |
| Dunns Engineering Medical Limited | Manufacturing | 2016 |
| Durnford Landscapes Limited | Administrative & support | 2023 |
| Durowipers Ltd | Extraterritorial | 2010 |
| DV Repairs & More Ltd | Administrative & support | 2017 |
| Dyeworks Limited | Manufacturing | 2002 |