| Cotswold General Trading Ltd | Manufacturing | 2024 |
| Cotswold Gleam Team Ltd | Administrative & support | 2020 |
| Cotswold Hands Ltd | Construction | 2019 |
| Cotswold Health & Wellness Practice Ltd | Health & social care | 2025 |
| Cotswold Heritage Electrical Ltd | Construction | 2024 |
| Cotswold Holiday Gems Ltd | Hospitality | 2017 |
| Cotswold Home Rental Sunbeds Ltd | Other services | 2022 |
| Cotswold Laser Creations Ltd | Professional & scientific | 2024 |
| Cotswold Manor Estate LLP | | 2025 |
| Cotswold Medical Clinics Ltd | Health & social care | 2020 |
| Cotswold Microcement Ltd | Construction | 2025 |
| Cotswold Mot's Limited | Manufacturing | 2013 |
| Cotswold Motorhome Hire (Oxfordshire) Ltd | Administrative & support | 2023 |
| Cotswold Physiotherapy Limited | Health & social care | 2005 |
| Cotswold Property Holdings Limited | Hospitality | 2026 |
| Cotswold Property Partners (Holdings) Limited | Real estate | 2022 |
| Cotswold Property Partners Limited | Hospitality | 2021 |
| Cotswold Rainwater Services Limited | Construction | 1990 |
| Cotswold Safe Deposit Limited | Administrative & support | 2025 |
| Cotswold Safeguarding Consultancy Ltd | Health & social care | 2022 |
| Cotswold Screen Printers Limited | Manufacturing | 1986 |
| Cotswold Sheepskin Limited | Wholesale & retail | 2001 |
| Cotswold Stonemasonry Limited | Extraterritorial | 2004 |
| Cotswold Tool and Press Limited | Manufacturing | 1974 |
| Cotswold Wedfest CIC | Administrative & support | 2025 |
| Cotswold Window & Door Repairs Ltd | Construction | 2021 |
| Cotswold Wood Fired Pizza Co. Limited | Hospitality | 2023 |
| Cotswold's Painting&Decorating Ltd | Construction | 2019 |
| Cotswolds Capital Limited | Financial services | 2018 |
| Cotswolds Hospitality Group Limited | Real estate | 2024 |
| Cotswolds Motorsport Ltd | Professional & scientific | 2025 |
| Cotswolds Pilates Company Ltd | Arts & recreation | 2025 |
| Cotswolds Publishing Ltd | Information & communication | 2025 |
| Cotswolds Rivers Trust | Administrative & support | 2011 |
| Cotswolds Townhouse Retreats Limited | Real estate | 2025 |
| Cotswolds Wellness Ltd | Other services | 2025 |
| Cottrell Plumbing & Heating Limited | Construction | 2004 |
| Cottsway Group Treasury PLC | Extraterritorial | 2015 |
| Countryfit Limited | Arts & recreation | 2025 |
| Countryside & Forestry Ltd | Administrative & support | 2018 |
| Countrysmiths Limited | Wholesale & retail | 2010 |
| County Developments (Northampton) Limited | Construction | 2013 |
| County Plumbing Supplies Ltd | Wholesale & retail | 2021 |
| Courtenay-Crane Properties Ltd | Real estate | 2017 |
| Courtlands Property Management Ltd | Real estate | 2016 |
| Cousins Healthcare Limited | Health & social care | 2026 |
| Covenant Management Limited | Real estate | 2007 |
| Covered UP Limited | Construction | 2009 |
| Covert Investigations Ltd | Professional & scientific | 2024 |
| Cowley Classic Motor Spares Ltd | Wholesale & retail | 2015 |
| COX Electrical (South) Limited | Construction | 2021 |
| Coxford Travel Limited | Transport & logistics | 2023 |
| Coxwell Gate Management Company (Faringdon) Limited | Households | 2002 |
| CP Carpentry & Construction (Oxford) Ltd | Construction | 2024 |
| Cpds Europe Ltd | Professional & scientific | 2025 |
| Crafted by Leanne Marie Ltd | Manufacturing | 2020 |
| Craig Gibbons General Builder Limited | Construction | 2022 |
| Craig Wyatt Plumbing and Heating Ltd | Construction | 2020 |
| Cranbrook House (Oxford) Management Company Limited | Households | 2025 |
| Cranley Orchard Residents Limited | Real estate | 2004 |
| Crawford Quantity Surveying (CQS) Ltd | Professional & scientific | 2024 |
| Crayfourd Construction Ltd | Construction | 2025 |
| CRE8TE Design Holdings Limited | Financial services | 2019 |
| CRE8TE Design Limited | Professional & scientific | 2009 |
| Creative AD Co Limited | Professional & scientific | 2000 |
| Creative Gold Property Limited | Real estate | 2021 |
| Creative Orthopaedic Solutions Ltd | Real estate | 2013 |
| Cricks Family Butchers Eynsham & Wheatley Limited | Wholesale & retail | 2022 |
| Crispin Thinlunch Enterprises Limited | Financial services | 2017 |
| Crocodile Bytes Ltd | Information & communication | 2023 |
| Crocodiles of the World Limited | Arts & recreation | 2010 |
| Croftsware Limited | Information & communication | 2010 |
| Crown Metal Roofing (Oxford) Limited | Construction | 2011 |
| Crown Mews (OCK Street) Management Company Limited | Households | 1995 |
| Crudgeco Solutions Ltd | Agriculture & fishing | 2023 |
| Crudgeco Storage Ltd | Real estate | 2022 |
| Crux Business Solutions Limited | Information & communication | 2017 |
| Cruzada & Gagui Ltd | Real estate | 2018 |
| Cryoworld Ltd | Professional & scientific | 2021 |
| Crystallize 4CS Limited | Professional & scientific | 2021 |
| CT Creative Solutions Holdings Limited | Financial services | 2021 |
| CT Creative Solutions Ltd | Health & social care | 2011 |
| CTA Management Consulting Limited | Professional & scientific | 2008 |
| CTN Corporation Ltd. | Other services | 2017 |
| Culinary Collective Group Limited | Professional & scientific | 2024 |
| Culinary Gangster Ltd | Hospitality | 2019 |
| Cultured Audio Limited | Manufacturing | 2020 |
| Cumbervale (Lofts) Limited | Construction | 2006 |
| CUP of Love Ltd | Hospitality | 2025 |
| Curated Property Styling Ltd | Professional & scientific | 2025 |
| Curbridge Park Management Company Limited | Households | 2001 |
| Curious Kittens Ltd | Information & communication | 2024 |
| Curry House Oxfordshire Ltd | Hospitality | 2015 |
| Custex Ltd | Professional & scientific | 2025 |
| Customer Psychology Ltd | Professional & scientific | 2010 |
| CVC Direct Ltd | Other services | 1985 |
| Cy-Hsln Ltd | Professional & scientific | 2025 |
| Cybergen Security Ltd | Information & communication | 2025 |
| Cyberprotect Ltd | Information & communication | 2015 |
| Cycle Savvy Limited | Education | 2023 |