| CB Inspection (NE) Limited | Professional & scientific | 2013 |
| CB Property Solutions Northern Ltd | Administrative & support | 2011 |
| CBL Property Maintenance Ltd | Construction | 2026 |
| CBS Teesside Limited | Real estate | 2017 |
| Cbseven Ltd | Real estate | 2025 |
| CC Solutions Group Ltd | Professional & scientific | 2026 |
| CC Technical Services Limited | Professional & scientific | 2020 |
| CCC Scaffolding Limited | Construction | 2025 |
| CCD Technical Limited | Professional & scientific | 2023 |
| Cces Electrical Services Limited | Construction | 2020 |
| CCG Cable Terminations Limited | Wholesale & retail | 2002 |
| CCL Fleet Management Ltd | Transport & logistics | 2023 |
| Ccmb Limited | Construction | 2022 |
| CCN Property Ltd | Real estate | 2025 |
| CCR Inspection Limited | Professional & scientific | 2013 |
| Cct&E Services Limited | Professional & scientific | 2016 |
| Cctv Monitoring and Patrol Limited | Administrative & support | 2004 |
| CD Carpentry (NE) Limited | Manufacturing | 2019 |
| CDB Design Ltd | Construction | 2007 |
| Cdci Limited | Professional & scientific | 2025 |
| CDM Management Limited | Real estate | 2024 |
| CDM Rigging Services Limited | Professional & scientific | 2021 |
| CDP Project Management Ltd | Construction | 2024 |
| CDS (Disabled Supplies) 2009 Ltd | Wholesale & retail | 2009 |
| Cece's (Middlesbrough) Limited | Hospitality | 2025 |
| Cedar Care Professionals Ltd | Administrative & support | 2023 |
| Cedar E&I Services Ltd | Energy | 2021 |
| CEF Engineering Limited | Information & communication | 2024 |
| CEI Properties Limited | Real estate | 2022 |
| Celeste Stays Ltd | Real estate | 2026 |
| Celestial Windows and Conservatories Limited | Manufacturing | 2010 |
| Cellar Door Properties Ltd | Real estate | 2019 |
| Celtrain Ltd | Education | 2021 |
| Cent Ltd | Wholesale & retail | 2025 |
| Centex Auto Refinishing Services Limited | Professional & scientific | 1994 |
| Central Escapes Limited | Real estate | 2025 |
| Central Garage Hinderwell Limited | Wholesale & retail | 2020 |
| Central Middlesbrough PCN Limited | Health & social care | 2025 |
| Centre Marketing Ltd | Professional & scientific | 2013 |
| Century Auto Refinishers Limited | Wholesale & retail | 2008 |
| Century Three Ltd | Real estate | 2025 |
| CEO PR Limited | Professional & scientific | 2018 |
| Cerberus Ltd | Extraterritorial | 2025 |
| Cerebrus AI Limited | Wholesale & retail | 2025 |
| Cerv North East Ltd | Construction | 2025 |
| CF Forster Property Development Limited | Real estate | 2020 |
| CF Ropeaccess Ltd | Construction | 2023 |
| CFL Motors Ltd | Wholesale & retail | 2026 |
| CFM Services Ltd | Professional & scientific | 2026 |
| CG Lifting (NE) Limited | Construction | 2019 |
| CG Walker High Voltage Ltd | Construction | 2024 |
| CG5 Utilities Limited | Administrative & support | 2023 |
| CGR Portfolio Limited | Construction | 2005 |
| CGR Safety Solutions Limited | Mining & quarrying | 2017 |
| CGS Fencing Ltd | Administrative & support | 2021 |
| CGS Group Holdings Ltd | Financial services | 2026 |
| CH Access Ltd | Construction | 2019 |
| CH Paving Ltd | Administrative & support | 2023 |
| CH Roofing and Building Ltd | Construction | 2020 |
| CH Seller Ltd | Wholesale & retail | 2025 |
| CH Soccer Services Limited | Arts & recreation | 2014 |
| CH Watch Repairs Limited | Other services | 2016 |
| CH23 Limited | Construction | 2007 |
| Chadwicks Inn (Lease) Ltd | Hospitality | 2017 |
| Chaii-Wale Limited | Hospitality | 2020 |
| Chaloner ST Coffee House Ltd | Hospitality | 2023 |
| Chameleon Marketing (H.I) Ltd | Construction | 2012 |
| Chancery Investments (NE) Ltd | Real estate | 2015 |
| Change Labs Group Ltd | Professional & scientific | 2024 |
| Changing Winds Property Investment Ltd | Real estate | 2021 |
| Channa Enterprises Ltd | Wholesale & retail | 2025 |
| Chapel 1890 Ltd | Hospitality | 2021 |
| Chapman Instrument Services Ltd | Professional & scientific | 2023 |
| Chapman Instruments Ltd | Professional & scientific | 2026 |
| Chappy's Bistro Limited | Hospitality | 2019 |
| Character Access Limited | Construction | 2025 |
| Charis Security Services Ltd | Administrative & support | 2016 |
| Charisma Empire Limited | Wholesale & retail | 2025 |
| Charles Clinkard Limited | Wholesale & retail | 1953 |
| Charles Newmarch French Polishing Ltd | Other services | 2004 |
| Charles Wells Properties Ltd | Real estate | 2021 |
| Charlescoms Ltd | Information & communication | 2024 |
| Charlie Construction Ltd | Manufacturing | 2018 |
| Charlie the VET Ltd | Manufacturing | 2021 |
| Charlies Fresh Food & Convenience Ltd | Wholesale & retail | 2026 |
| Charlton and Caster Limited | Professional & scientific | 2019 |
| Charlton Courier Ltd | Transport & logistics | 2025 |
| Charltonmason Ltd | Construction | 2023 |
| Charnwood Commercial Services Limited | Professional & scientific | 2015 |
| Charnwood Dental Limited | Health & social care | 2008 |
| Charon Ltd | Wholesale & retail | 2018 |
| Chartwell Retail Limited | Wholesale & retail | 2024 |
| Chase Kart Limited | Wholesale & retail | 2024 |
| Chat & PAT Ltd | Agriculture & fishing | 2025 |
| Checkmate Inspections Ltd | Professional & scientific | 2025 |
| Checkmmate Inspections Limited | Other services | 2019 |
| Cheesebrough Electrical Services Limited | Construction | 2007 |
| Cheesman & Co Limited | Health & social care | 2016 |
| Cheesy Tees Ltd | Wholesale & retail | 2024 |
| Cheetham Providence Ltd | Information & communication | 2026 |