| Community Connect Hub CIC | Hospitality | 2023 |
| Community Education Employment and Advice (Radford) Ltd | Education | 2012 |
| Community Education Employment and Advice Ltd | Education | 2020 |
| Community Ethical Media Ltd | Information & communication | 2004 |
| Community Glaucoma Ltd | Health & social care | 2024 |
| Community Home Solutions Limited | Construction | 2020 |
| Community Learning Network (CLN) | Education | 2000 |
| Community Life Investments Ltd | Real estate | 2018 |
| Community Nutrition Farm Ltd | Agriculture & fishing | 2026 |
| Community Portal Ltd | Education | 2025 |
| Community Recording Studio | Health & social care | 2009 |
| Community Solutions Investment Partners Limited | Professional & scientific | 2002 |
| Community Support Hub Ltd | Administrative & support | 2025 |
| Community Transport BUS CIC | Other services | 2024 |
| Community Voices Matter Limited | Health & social care | 2013 |
| Compa Foods Limited | Hospitality | 2021 |
| Compact Solution Limited | Administrative & support | 2024 |
| Company Chemists Association Limited | Other services | 1898 |
| Company Health Management Ltd | Health & social care | 2012 |
| Company Records Limited | Information & communication | 2009 |
| Comparethegym Ltd | Other services | 2019 |
| Compass DUE North Ltd | Water & waste | 2021 |
| Compass DUE South Ltd | Professional & scientific | 2025 |
| Compass Elite Consulting Ltd | Professional & scientific | 2025 |
| Compass Group (East Midlands) Ltd | Manufacturing | 2023 |
| Compass Hire Solutions Ltd | Financial services | 2012 |
| Compass Homes Support CIC | Hospitality | 2026 |
| Compass Homes Support Services Ltd | Hospitality | 2023 |
| Compass Logistics Services Ltd | Transport & logistics | 2019 |
| Compass Networks Limited | Information & communication | 2005 |
| Compass Plus (Great Britain) Limited | Information & communication | 2005 |
| Compass Plus GB Online Limited | Information & communication | 2021 |
| Compass Research Limited | Professional & scientific | 1998 |
| Compass Specialists Ltd. | Professional & scientific | 2025 |
| Compassion Care Help CIC | Health & social care | 2025 |
| Compassion Care Limited | Health & social care | 2012 |
| Compassionate Cultures Ltd | Professional & scientific | 2021 |
| Compassionate Krew CIC | Education | 2026 |
| Compelling Connections Ltd | Education | 2026 |
| Competa Properties Limited | Construction | 1985 |
| Competitive Auto Sales Limited | Wholesale & retail | 2023 |
| Competitive Carbon Composites Limited | Professional & scientific | 2011 |
| Complete Building Inspection Ltd | Administrative & support | 2017 |
| Complete Cable Services Limited | Professional & scientific | 2013 |
| Complete Care Holdings Limited | Health & social care | 2002 |
| Complete Care Needs Ltd | Health & social care | 2022 |
| Complete Care Nottingham Limited | Health & social care | 2025 |
| Complete Care Servco Limited | Professional & scientific | 2019 |
| Complete Compliance Solutions Limited | Administrative & support | 2020 |
| Complete Conveyor Projects Limited | Manufacturing | 2017 |
| Complete Cooling Services Ltd | Construction | 2002 |
| Complete Electrical Nottingham Ltd | Other services | 2021 |
| Complete Heating Care Limited | Construction | 2018 |
| Complete House Solutions Ltd | Construction | 2024 |
| Complete Hygiene Solutions Limited | Wholesale & retail | 2005 |
| Complete Industrial Access Ltd | Other services | 2018 |
| Complete Insulated Structures Limited | Construction | 2026 |
| Complete Joinery Midlands Limited | Administrative & support | 2008 |
| Complete Lean Tube Limited | Manufacturing | 2018 |
| Complete Logistics Group Limited | Wholesale & retail | 2021 |
| Complete Money Care Ltd | Financial services | 2011 |
| Complete North America Limited | Administrative & support | 1999 |
| Complete Racking Solutions UK Ltd | Manufacturing | 2017 |
| Complete Roofing Exsperts Limited | Construction | 2025 |
| Complete Safety Compliance Ltd | Public administration | 2023 |
| Complete Sales Progression Ltd | Real estate | 2023 |
| Complete Shopfitting Services Ltd | Administrative & support | 2009 |
| Complete Skydiving Solutions Limited | Arts & recreation | 2024 |
| Complete Tools and Fixings TR Ltd | Wholesale & retail | 2017 |
| Complete Traveller Limited | Administrative & support | 2011 |
| Complete View Ltd | Other services | 2024 |
| Complete Warehouse Group Holdings Limited | Administrative & support | 2017 |
| Complete Warehouse Services Limited | Transport & logistics | 2013 |
| Complete-Upkeep. Co. UK Ltd | Construction | 2019 |
| Complex Landscapes Ltd | Administrative & support | 2023 |
| Compliance Surveys Ltd | Professional & scientific | 2002 |
| Complispace Europe Limited | Administrative & support | 2014 |
| Compliville Ltd | Information & communication | 2026 |
| Compose Dental Limited | Health & social care | 2022 |
| Composite Braiding Limited | Manufacturing | 2016 |
| Compost Corner (Nottm) Limited | Wholesale & retail | 2017 |
| Compound Corporate Health Ltd | Other services | 2021 |
| Compound Fitness Limited | Other services | 2013 |
| Compound Healthcare Ltd | Health & social care | 2021 |
| Compound Strength & Conditioning Ltd | Other services | 2021 |
| Comprehensive IT Developers Ltd | Information & communication | 2023 |
| Compton Acres Dental Practice Limited | Health & social care | 2006 |
| Compton Electrical Contractors Ltd | Construction | 2022 |
| Compton Wealth Management Limited | Professional & scientific | 2019 |
| Compusys Consulting Ltd | Information & communication | 2015 |
| Compute Cloud Services Ltd | Information & communication | 2020 |
| Computer Literate Limited | Information & communication | 2001 |
| Computer Support (Nottingham) Limited | Information & communication | 2003 |
| Computer Visual Design Limited | Professional & scientific | 1989 |
| Computerised Accounting Solutions (Nottingham) Ltd | Information & communication | 2000 |
| Compuweb Communications Services Limited | Information & communication | 1999 |
| Comunal Ltd | Health & social care | 2023 |
| Concept 2 Limited | Wholesale & retail | 1989 |
| Concept 3 Consulting Limited | Administrative & support | 2018 |
| Concept Builders & Joiners Nottingham Limited | Construction | 2011 |