| Commercial & Properties Ltd | Real estate | 2023 |
| Commercial Aluminium Services Limited | Construction | 2008 |
| Commercial and Industrial Lighting Services Limited | Professional & scientific | 2017 |
| Commercial Body Solutions Limited | Manufacturing | 2014 |
| Commercial Car Claims Ltd | Administrative & support | 2024 |
| Commercial Catering B'Ham Ltd | Manufacturing | 2016 |
| Commercial Curiosity 108 Ltd | Professional & scientific | 2026 |
| Commercial Doors and Windows Ltd | Construction | 2021 |
| Commercial Electrical Services Ltd | Construction | 2026 |
| Commercial Engineering Services Limited | | 1991 |
| Commercial Equipt Limited | Wholesale & retail | 2021 |
| Commercial Fashions Limited | Wholesale & retail | 2001 |
| Commercial Financial Solutions Limited | Financial services | 2014 |
| Commercial Floors Ltd | Construction | 2019 |
| Commercial Heights Ltd | Real estate | 2018 |
| Commercial Management Consulting Limited | Professional & scientific | 2012 |
| Commercial Matrix Ltd | Information & communication | 2026 |
| Commercial Properties (West Midlands) Limited | Real estate | 2017 |
| Commercial Properties Parking Limited | Real estate | 2011 |
| Commercial Rates Ltd | Professional & scientific | 2023 |
| Commercial Services (Birmingham) Limited | Wholesale & retail | 2001 |
| Commercial Tarmacadam Limited | Administrative & support | 2017 |
| Commercial Testing Services Limited | Professional & scientific | 2003 |
| Commercial Tiling Limited | Manufacturing | 2026 |
| Commex Property Services Ltd | Professional & scientific | 2018 |
| Commex Services Ltd | Transport & logistics | 2017 |
| Commodus Germany Limited | Administrative & support | 2008 |
| Common Interest Solutions Ltd | Information & communication | 2019 |
| Common Interests Beauty Ltd | Other services | 2023 |
| Common Land DEV Limited | Administrative & support | 2020 |
| Common Land Holdings Ltd | Extraterritorial | 2020 |
| Common Lane 1970 Limited | Extraterritorial | 2015 |
| Common Unity Housing Ltd | Health & social care | 2024 |
| Commonhold Property Management Ltd | Professional & scientific | 2021 |
| Commonwealth Mint Worldwide Ltd | Extraterritorial | 2011 |
| Commrai Commercial Limited | Financial services | 2019 |
| Commstech Pro Limited | Wholesale & retail | 2022 |
| Commston Ltd | Information & communication | 2020 |
| Communicourt Limited | Professional & scientific | 2011 |
| Communities and Housing Investment Consortium Limited | Wholesale & retail | 2010 |
| Communities Engage and Thrive C.I.C. | Public administration | 2019 |
| Community Advisory Services Ltd | Professional & scientific | 2026 |
| Community Aero-Kick Ltd | Arts & recreation | 2014 |
| Community Breast Care Ltd. | Health & social care | 2015 |
| Community Bridges UK CIC | Education | 2026 |
| Community Buildings Ltd | Real estate | 2022 |
| Community Care Foundation Birmingham Ltd | Other services | 2020 |
| Community Care Housing C.I.C. | Hospitality | 2024 |
| Community Care Recruitment Ltd | Health & social care | 2013 |
| Community Cohesion Projects CIC | Education | 2023 |
| Community Connect Network CIC | Other services | 2025 |
| Community Deaf | Education | 2013 |
| Community Diagnostic Services Limited | Health & social care | 2025 |
| Community Drive CIC | Education | 2025 |
| Community Education Services (UK) Ltd | Education | 2014 |
| Community Engage CIC | Hospitality | 2026 |
| Community Engagement Services C.I.C. | Arts & recreation | 2015 |
| Community Enterprise Growth C.I.C. | Administrative & support | 2020 |
| Community Environmental Trust | Information & communication | 2000 |
| Community Foundation | Education | 2010 |
| Community Fusion West Midlands Limited | Education | 2013 |
| Community Group & K Limited | Other services | 2019 |
| Community Guidance and Learning Hub CIC | Education | 2026 |
| Community Heart Hub Community Interest Company | Education | 2025 |
| Community Holmes Ltd | Real estate | 2024 |
| Community Housing Solutions Ltd | Extraterritorial | 2025 |
| Community Immigration Services Ltd | Professional & scientific | 2021 |
| Community Interest Research Centre (Circ) CIC | Professional & scientific | 2025 |
| Community Labour Ltd | Hospitality | 2023 |
| Community Life Network CIC | Health & social care | 2023 |
| Community Living and Support Services Limited | Health & social care | 2009 |
| Community Music Drive CIC | Information & communication | 2011 |
| Community Navigator Services C.I.C. | Professional & scientific | 2013 |
| Community Networks and Education CIC | Education | 2022 |
| Community Outreach Centre C.I.C. | Public administration | 2023 |
| Community Pathways Ltd | Health & social care | 2024 |
| Community Plaza CIC | Education | 2024 |
| Community Policy Forum Limited | Other services | 2022 |
| Community Quest CIC | Hospitality | 2025 |
| Community Reform CIC | Education | 2022 |
| Community Social Housing CIC | Hospitality | 2025 |
| Community Support Services C.I.C. | Health & social care | 2022 |
| Community Supportive Housing Ltd | Real estate | 2024 |
| Community Transport Services Birmingham Ltd | Transport & logistics | 2015 |
| Community Tuition Centre Ltd | Education | 2018 |
| Community, Education and Development Foundation Limited | Other services | 2002 |
| Communityuplift CIC | Education | 2023 |
| Compact Orbital Gears Limited | Manufacturing | 2001 |
| Compact Soft Limited | Information & communication | 2013 |
| Compact With Love Ltd | Wholesale & retail | 2022 |
| Compalley Ltd | Information & communication | 2022 |
| COMPANIES999 Ltd | Professional & scientific | 2025 |
| Companion Healthcare Ltd | Health & social care | 2021 |
| Company Associates Limited | Professional & scientific | 2014 |
| Compare Energy Solutions Ltd | Professional & scientific | 2026 |
| Compare Travel Essentials Ltd | Administrative & support | 2019 |
| Compare UK Pharma Ltd | Information & communication | 2022 |
| Comparepost.Com Limited | Transport & logistics | 2013 |
| Comparethebuild.Com Limited | Information & communication | 2022 |
| Comparison Guru Ltd | Information & communication | 2024 |