| Creative Exchange Artist Studios | Arts & recreation | 2008 |
| Creative Granary Limited | Real estate | 2021 |
| Creative Industries New Entrant Scheme Limited | Information & communication | 2022 |
| Creative Local Action Responses & Engagement C.I.C. | Administrative & support | 2013 |
| Creative NRG Limited | Administrative & support | 2006 |
| Creative Online Media Ltd | Information & communication | 2003 |
| Creative Silo Limited | Financial services | 2023 |
| Creative Smiles Dental Practice Limited | Health & social care | 2010 |
| Creative Workers Co-Operative Ltd | Information & communication | 2012 |
| Creative ZOO Marketing Ltd | Professional & scientific | 2012 |
| Creativity Communications Ltd | Professional & scientific | 2025 |
| Creavona Limited | Wholesale & retail | 2026 |
| Credomark L.P. | | 2016 |
| Creed Solicitors Limited | Professional & scientific | 2015 |
| Creenagh Homes Ltd | Administrative & support | 2005 |
| Creevy Autos Limited | Wholesale & retail | 2022 |
| Cregagh Court Services Limited | Households | 1987 |
| Cregagh Labs Limited | Health & social care | 2012 |
| Cregagh Limited | Construction | 2017 |
| Cregaghy Road Takeaway Ltd | Hospitality | 2025 |
| Cregg Stone (N.I.) Limited | Manufacturing | 2020 |
| Cregganconroe Windfarm Limited | Energy | 2010 |
| Creighton Group Ltd | Financial services | 2015 |
| Creighton Manor Housing Development Limited | Households | 1999 |
| Creighton Mews Development Company Limited | Extraterritorial | 2001 |
| Creighton Mews Property Management Company Limited | Extraterritorial | 2001 |
| Creightons of Balmoral Ltd | Wholesale & retail | 2015 |
| Creightons of Blacks Road Ltd | Wholesale & retail | 2015 |
| Creightons of Finaghy Ltd | Wholesale & retail | 1973 |
| Crema Coffee (N.I.) Company Limited | Wholesale & retail | 2018 |
| Cremton Impact Limited | Real estate | 2023 |
| Crenia Ltd | Real estate | 2015 |
| Crescent (Holywood) Management Limited | Households | 1994 |
| Crescent Bone Health Belfast Limited | Professional & scientific | 2024 |
| Crescent Capital III B LP | | 2011 |
| Crescent Capital IV LP | | 2019 |
| Crescent Motor Company Limited | Wholesale & retail | 2021 |
| Cresit Limited | Information & communication | 2024 |
| Crest Dynamics Limited | Wholesale & retail | 2024 |
| Crest Lion Investments Ltd | Real estate | 2024 |
| Crestbrook Corporation Limited | Professional & scientific | 2020 |
| Crestlink Organization L.P. | | 2018 |
| Crevenagh Hall Properties Ltd | Households | 2020 |
| Crevo Ltd | Wholesale & retail | 2025 |
| Crewdson Consulting Limited | Professional & scientific | 2025 |
| Crewe Park Investments Limited | Financial services | 2015 |
| Crewfield Transport L.P. | | 2018 |
| Cricket Jobs Ltd | Administrative & support | 2023 |
| Crighshane Wind Farm Limited | Energy | 2004 |
| Crimbert Ltd | Information & communication | 2024 |
| Cristie Restaurants Limited | Hospitality | 2017 |
| Cristivia Limited | Health & social care | 2015 |
| Critical Care Reviews | Education | 2013 |
| Critical Skill Ltd | Public administration | 2022 |
| CRL Motors Ltd | Wholesale & retail | 2020 |
| Crlab(Ni) Ltd | Other services | 2022 |
| CRN Financial Management Services Ltd | Extraterritorial | 1974 |
| CRN Financial Services Limited | Financial services | 1985 |
| Croaghaun Holdings Ltd | Water & waste | 2021 |
| Croaghaun Ltd | Water & waste | 2018 |
| Crochet Achini Limited | Wholesale & retail | 2025 |
| Crockandun Wind Farm Limited | Energy | 2014 |
| Crockbaravally Wind Farm Ltd | Energy | 2011 |
| Crockford Consulting Ltd | Administrative & support | 2018 |
| Crockmore View Management Limited | Households | 2025 |
| Crocknamoyle Investments Limited | Real estate | 2025 |
| Crocus Trading Ltd | Hospitality | 2019 |
| Crofton Interiors Ltd | Construction | 2010 |
| Crofty Trading Limited | Manufacturing | 2006 |
| Croi Dubh Limited | Real estate | 2024 |
| Croii Ltd | Information & communication | 2023 |
| Cromac Quay Limited | Real estate | 2013 |
| Cromac Regeneration Initiative C.I.C. | Extraterritorial | 2010 |
| Cromac Square Limited | Real estate | 2015 |
| Cromac Street Studio Ltd | Information & communication | 2018 |
| Cromlyn Wood Ltd | Households | 2023 |
| Cromwell 32 Limited | Extraterritorial | 2012 |
| Cromwell Belfast Apartments Ltd | Households | 2007 |
| Cronston Limited | Real estate | 1995 |
| Croob Properties Ltd | Real estate | 2005 |
| Crophound Limited | Information & communication | 2019 |
| Crosby Windows (NI) Ltd | Construction | 2013 |
| Cross Square Hotel Limited | Hospitality | 2015 |
| Crossbow Agencies Limited | Information & communication | 1997 |
| Crossdermott Wind Limited | Energy | 2015 |
| Crossfit Rslt Ltd | Arts & recreation | 2023 |
| Crossfit TBB Ltd | Arts & recreation | 2026 |
| Crosshill Enviro Limited | Water & waste | 2015 |
| Crosshill Property Limited | Real estate | 2015 |
| Crosslands Properties Limited | Real estate | 2003 |
| Crosspharma Limited | Wholesale & retail | 1987 |
| Crossplatform Development Ltd | Information & communication | 2023 |
| Crossroads Care NI | Other services | 1996 |
| Crossroads Care NI Recruitment Agency Limited | Administrative & support | 2019 |
| Crossvale Europe Limited | Information & communication | 2016 |
| Crosswaving Trading Ltd | Wholesale & retail | 2026 |
| Crowbe Enterprises Limited | Administrative & support | 1995 |
| Crowded Space Limited | Hospitality | 2024 |
| Crowe Ballyboley Limited | Hospitality | 2019 |
| Crown Creative Holdings Limited | Financial services | 2023 |