| Coney Lodge View Ltd | Real estate | 2019 |
| Confetti and Carousel Limited | Administrative & support | 2017 |
| Connect Mobile Radio Limited | Information & communication | 2012 |
| Connektred Ltd | Wholesale & retail | 2018 |
| Conservatories Direct (Midlands) Limited | Construction | 2005 |
| Construct UK Group Limited | Financial services | 2025 |
| Construction Consultancy Services (UK) Limited | Construction | 2018 |
| Contact Coffee Company Limited | Wholesale & retail | 2016 |
| Content Minds CIC | Education | 2025 |
| Content Shack Ltd | Extraterritorial | 2022 |
| Contineo Technology Ltd | Information & communication | 2024 |
| Control Logistics Ltd | Transport & logistics | 2024 |
| Conway Construction & Training Limited | Education | 2013 |
| Coope Holdings Limited | Financial services | 2026 |
| Cooper & Co. Business Consultants Limited | Professional & scientific | 2009 |
| Cooper and Gracie Limited | Wholesale & retail | 2017 |
| Cooper's Solar Panel Installations Ltd | Construction | 2023 |
| Coopers Recycling Limited | Water & waste | 2018 |
| Copious Finance Ltd | Financial services | 2019 |
| Copsons Commercials Ltd | Manufacturing | 2021 |
| Copy I.T Technical Limited | Administrative & support | 2018 |
| Corey Campbell Developments Limited | Construction | 2017 |
| Cornerstone Bookkeeping Services Limited | Professional & scientific | 2022 |
| Cornucopian Properties Limited | Professional & scientific | 2014 |
| Corrosion Control Affiliates Ltd | Professional & scientific | 2016 |
| Cosauto Limited | Wholesale & retail | 2024 |
| Cosgrove Management Limited | Construction | 2022 |
| Coton Interiors Ltd | Construction | 2014 |
| Cotswold Land & Property Limited | Real estate | 2020 |
| Cottons Property and Developments Ltd | Real estate | 2024 |
| Cotty's Waste Removal Ltd | Transport & logistics | 2026 |
| CPM Motors Ltd | Wholesale & retail | 2025 |
| Cpms Training Services Limited | Other services | 2003 |
| Crabmill Glamping Ltd | Hospitality | 2022 |
| Crabmill Properties Limited | Hospitality | 2016 |
| Craft Crusades Ltd | Arts & recreation | 2025 |
| Craig Dace Drylining Limited | Wholesale & retail | 2008 |
| Craig Hill Fencing Limited | Construction | 2017 |
| Craig Whyman Building Services Limited | Construction | 2016 |
| Crandon Cubs Nursery Ltd | Health & social care | 2025 |
| Creation Hair and Beauty Limited | Other services | 2015 |
| Creation Wholesale Limited | Wholesale & retail | 2017 |
| Creative Auto Solutions Ltd | Wholesale & retail | 2019 |
| Creative Technikal Services Limited | Construction | 2015 |
| Creative Vehicle Wrapping Limited | Professional & scientific | 2020 |
| Crestview Living Residential Ltd | Health & social care | 2024 |
| Creteprint Paving Co Limited | Construction | 2011 |
| Crewglen Limited | Arts & recreation | 1982 |
| CRH (Stafford) Limited | Financial services | 2010 |
| CRH Corporation Limited | Other services | 2025 |
| CRJ Family PUB Co Limited | Hospitality | 2025 |
| Crocsrockco Ltd | Wholesale & retail | 2023 |
| Croft BC Holding Ltd | Financial services | 2018 |
| Croft Building & Conservation Ltd | Construction | 2002 |
| Cronimet Great Britain Limited | Wholesale & retail | 1985 |
| Cross & Co Property Limited | Households | 2016 |
| Crossan Safety Consultants Ltd | Professional & scientific | 2026 |
| Crown Court (Penkridge) Management Company Limited | Real estate | 2003 |
| Crown Floor and Fabric Care Limited | Administrative & support | 2022 |
| Crown Legal Services Limited | Extraterritorial | 2003 |
| CRS Performance Limited | Wholesale & retail | 2020 |
| CRS Plumbing & Heating Ltd | Construction | 2013 |
| Cruise Central Limited | Administrative & support | 2022 |
| Crusty Pizza and Grill Ltd | Hospitality | 2025 |
| CRW Property Limited | Real estate | 2023 |
| Crystal Academy: Aerial Arts & Dance CIC | Education | 2023 |
| Crystal Evolution Ltd | Real estate | 2024 |
| Crystal Fountain Midlands Limited | Hospitality | 2018 |
| CSH Property Management Limited | Real estate | 2026 |
| Cspc Healthcare Ltd | Health & social care | 2011 |
| CT Holdings & Property Ltd | Real estate | 2022 |
| CT Interiors Limited | Construction | 2017 |
| CTR Management Consultancy Limited | Professional & scientific | 2019 |
| Cube GAS Heating & Plumbing Ltd | Construction | 2008 |
| Current Affairs North Devon Ltd | Construction | 2024 |
| Curvaceous Bella Boutique Ltd | Wholesale & retail | 2024 |
| Customer Contact Resolution Limited | Other services | 2016 |
| Custos Investments Limited | Financial services | 2026 |
| Cuubo Limited | Hospitality | 2024 |
| Cyberbits Ltd | Information & communication | 2022 |
| CYCLONE21 TV Limited | Information & communication | 2007 |
| Cygnet Electronic Services Ltd | Manufacturing | 2003 |
| D & J House Maintenance Limited | Construction | 2024 |
| D & J S Developments Limited | Real estate | 2016 |
| D & K Chilled Transport Limited | Transport & logistics | 2010 |
| D Baugh Property Limited | Real estate | 2025 |
| D Chambers Limited | Wholesale & retail | 2018 |
| D H Castle Services Limited | Wholesale & retail | 2025 |
| D J a Contracts Ltd | Construction | 2012 |
| D J G Electrical Ltd | Professional & scientific | 2026 |
| D J Massey (2007) Limited | Wholesale & retail | 2007 |
| D L Motorcycles Limited | Other services | 2011 |
| D M Gaskell Brickwork Ltd | Construction | 2014 |
| D Murphy Electrical Installations Ltd | Construction | 2018 |
| D P Automotive Holdings Limited | Financial services | 2026 |
| D R Murray Properties Limited | Real estate | 2013 |
| D T Engineering (Midlands) Limited | Construction | 2016 |
| D Thompson Electrical Limited | Construction | 2005 |
| D W H Holdings Ltd | Professional & scientific | 2020 |
| D&C Telecoms Ltd | Information & communication | 2023 |