| Candy Carousel Ltd | Wholesale & retail | 2025 |
| Cardsuit Limited | Construction | 1998 |
| Carson Ventures Ltd | Financial services | 2024 |
| Castle Roofing Supplies Limited | Construction | 2002 |
| CCS Decoration Ltd | Construction | 2018 |
| CFM Prime Limited | Wholesale & retail | 2025 |
| Chambers Heating Ltd | Construction | 2015 |
| Championship Structures Ltd | Arts & recreation | 2019 |
| Chatteris Barber Ltd | Other services | 2022 |
| Chatteris Independent Funeral Services Ltd | Other services | 2013 |
| Chatteris OFF Licence Limited | Wholesale & retail | 2023 |
| Chatteris Spice Limited | Hospitality | 2023 |
| Chatteris Unionist Club Company Limited(The) | Real estate | 1914 |
| Chatti Logs Ltd | Agriculture & fishing | 2023 |
| Chatti Pawz Ltd | Agriculture & fishing | 2021 |
| Chromiumtech Limited | Wholesale & retail | 2008 |
| Circlone Limited | Information & communication | 2022 |
| Claerwen Cottages Ltd | Real estate | 2025 |
| Clamos Ltd | Wholesale & retail | 2025 |
| Clearance Professionals Ltd | Water & waste | 2020 |
| Cliffgate Holdings Limited | Professional & scientific | 2022 |
| CML Holdings Limited | Financial services | 2022 |
| Coign IT Solutions Ltd | Extraterritorial | 2011 |
| Collinsbrickwork Ltd | Construction | 2017 |
| Comer IT Services Limited | Information & communication | 2022 |
| Component Services Ltd | Wholesale & retail | 2021 |
| Composite Products Limited | Manufacturing | 2012 |
| Connect Care and Compliance Solutions Ltd | Health & social care | 2025 |
| CRC Creative Ltd | Professional & scientific | 2018 |
| Creative Models Ltd | Wholesale & retail | 2003 |
| Crewbotics Ltd. | Manufacturing | 2015 |
| Cross Health Consulting Ltd | Administrative & support | 2017 |
| Crown UK Limited | Manufacturing | 1991 |
| CTS Material Salvage Ltd | Wholesale & retail | 2019 |
| Cumulus Accountancy Limited | Extraterritorial | 2021 |
| Cumulus Accounting Limited | Extraterritorial | 2021 |
| Cumulus Bookkeeping Services Ltd | Professional & scientific | 2014 |
| Cumulus Payroll Services Ltd | Extraterritorial | 2017 |
| Cuthbert Family Law Limited | Professional & scientific | 2013 |
| Cycle Surgery Limited | Wholesale & retail | 2025 |
| D & R Housing Ltd | Construction | 2021 |
| Daiventa Ltd | Wholesale & retail | 2025 |
| David Polley Motorsport Ltd | Wholesale & retail | 2020 |
| Delilah Close Limited | Households | 2014 |
| Design Desk Limited | Professional & scientific | 2024 |
| Designtek Ltd | Information & communication | 2011 |
| DG Motorhomes Ltd | Wholesale & retail | 2019 |
| DG Whitby & SON Limited | Construction | 2009 |
| Digitalfreeone Ltd | Manufacturing | 2025 |
| DMJ Imagery Limited | Information & communication | 2016 |
| Dragon Inn Chatteris Ltd | Hospitality | 2018 |
| Duckpond Farm Ltd | Real estate | 2024 |
| Duffbros Ltd | Transport & logistics | 2025 |
| Dummy the Movie Ltd | Information & communication | 2007 |
| E & M Property Management Ltd | Real estate | 2012 |
| East Sussex Financial Limited | Financial services | 2025 |
| Eastern Heating & Plumbing Limited | Construction | 2002 |
| ECHOMK1 Ltd | Information & communication | 2024 |
| Eco-Pak Limited | Wholesale & retail | 1998 |
| Ecoshine Cleaning Ltd | Administrative & support | 2025 |
| Eden Tax Consultancy Ltd | Professional & scientific | 2025 |
| Edstation Ltd | Information & communication | 2012 |
| Egida Silver Wheels Ltd | Transport & logistics | 2022 |
| Elevano Ltd | Information & communication | 2023 |
| Ellis Winters (Chatteris) Limited | Real estate | 2004 |
| EMI Transport Ltd | Transport & logistics | 2019 |
| Emplake Ltd | Wholesale & retail | 2022 |
| EMR Renders & Wall Coatings Ltd | Construction | 2013 |
| EMR Renders Limited | Construction | 2015 |
| Endido Ltd | Households | 2018 |
| ENG8 Limited | Energy | 2023 |
| Enidantek Limited | Information & communication | 2003 |
| EQC Associates Ltd | Health & social care | 2025 |
| ERM Family Investment Company Limited | Extraterritorial | 2017 |
| Euro UK Logistic Ltd | Transport & logistics | 2019 |
| Europa Maxxi Ltd | Wholesale & retail | 2024 |
| Evox Medical Ltd | Information & communication | 2025 |
| Fade of House Limited | Other services | 2022 |
| Fenland Contracts Limited | Construction | 2012 |
| Fenland Drainage Contractors Ltd | Construction | 2020 |
| Fens Care Limited | Health & social care | 2022 |
| Fensport Ltd | Wholesale & retail | 2019 |
| Fentem-Jones Rehab Ltd | Professional & scientific | 2016 |
| Ferry Associates Ltd | Professional & scientific | 2003 |
| Ferry Environmental Services Ltd | Other services | 2021 |
| Finance & YOU Limited | Professional & scientific | 2024 |
| Fingate Holdings Limited | Professional & scientific | 2022 |
| Fiore Media Ltd | Information & communication | 2008 |
| Fireflies Forest School Ltd | Education | 2024 |
| Fit for Function VP Ltd | Professional & scientific | 2024 |
| Fitpilates Limited | Arts & recreation | 2010 |
| Fitzroy Property Holdings Limited | Real estate | 2023 |
| Flanders Services Limited | Construction | 2014 |
| Flux Marketing Ltd | Administrative & support | 2026 |
| Flying Fysh Cleaning Company Ltd | Administrative & support | 2013 |
| Food Consultancy Services Limited | Hospitality | 2015 |
| Football FUN Factory (Community 020) Limited | Arts & recreation | 2021 |
| Football FUN Factory (Community 114) Limited | Arts & recreation | 2024 |
| Four Counties Fencing, Stables and Sheds Limited | Construction | 2019 |
| Freeburn Robotics Limited | Professional & scientific | 2010 |