| Clare Abbott Eventing Ltd | Education | 2025 |
| Clyde-A-Scope Ltd | Construction | 2012 |
| Cochino Ltd | Real estate | 2016 |
| Colin Davidson Limited | Arts & recreation | 2007 |
| Combined Ltd | Professional & scientific | 2020 |
| Commercial FS Limited | Financial services | 2015 |
| Composite Products Ireland Ltd | Wholesale & retail | 2023 |
| Conduix Ltd | Information & communication | 2009 |
| Confido Polo LLP | | 2017 |
| Core Issues Trust | Education | 2011 |
| Corris Engineering Ltd. | Professional & scientific | 2016 |
| Corrosion Ltd | Professional & scientific | 2021 |
| Corsehill Dunlop Limited | Construction | 2026 |
| Crabtree Associates Limited | Real estate | 2024 |
| Craigavon Developments Limited | Construction | 2021 |
| Craigfad Ltd | Professional & scientific | 2014 |
| Crane Positive Postures Ltd | Professional & scientific | 2018 |
| Cromlyn 41 Ltd | Administrative & support | 2021 |
| Cromlyn House Surgical Ltd | Health & social care | 2001 |
| Crothers Commercial Holdings Ltd | Other services | 2023 |
| Crothers Construction Limited | Construction | 2019 |
| Culcavy Commercial Repairs Ltd | Wholesale & retail | 2025 |
| D&J Flooring Ltd | Construction | 2019 |
| Davison DX Consulting Ltd | Information & communication | 2021 |
| Dawn Aviation Limited | Education | 2014 |
| Delmas Holdings Ltd | Real estate | 2016 |
| Design ID Consulting Limited | Professional & scientific | 2011 |
| Design ID EOT Limited | Extraterritorial | 2026 |
| DGO Foundation | Other services | 2010 |
| DJC Contracts Ltd | Construction | 2022 |
| DM Retail Limited | Wholesale & retail | 2015 |
| Dominic Morris Architects Limited | Professional & scientific | 2009 |
| Down Developers Limited | Real estate | 2014 |
| Down Properties Ltd | Real estate | 2014 |
| DR a P Cairns Consulting Ltd | Health & social care | 2013 |
| DR MB Limited | Public administration | 2025 |
| Drumaknockan Farm to Fork Ltd | Hospitality | 2025 |
| Drumbo Limited | Professional & scientific | 2015 |
| E Ball Consulting Limited | Health & social care | 2022 |
| E Collins & Sons Ltd | Wholesale & retail | 2023 |
| Ebenezer Properties N.I. Limited | Construction | 2006 |
| Edentrillick Sport Horses Ltd | Agriculture & fishing | 2024 |
| Edgewater Apartments (Number Five) Limited | Households | 1988 |
| Eglantine Demesne Management Limited | Households | 2026 |
| Eleu Ltd | Other services | 2018 |
| Elevate Psychology Group Ltd | Health & social care | 2024 |
| Enerchem Solutions Limited | Manufacturing | 2019 |
| EOS IT Holdings Limited | Financial services | 2016 |
| EOS IT Management Solutions (UK) Ltd | Transport & logistics | 2013 |
| Epic Dental Limited | Health & social care | 2020 |
| Epoxy Flooring Solutions Ltd | Construction | 2024 |
| Escalade Rope Access Ltd | Professional & scientific | 2014 |
| Eti-Link Limited | Professional & scientific | 1992 |
| Everest Chartered Accountants Ltd | Professional & scientific | 2023 |
| Everest Venture Group Ltd | Financial services | 2024 |
| Evergreen Management Services Limited | Real estate | 2015 |
| Evolve Simply Ltd | Professional & scientific | 2020 |
| Excel Mech Ltd | Energy | 2023 |
| Excel Property Services Limited | Other services | 2025 |
| Expert Risk Management Ltd | Other services | 2021 |
| F a L Properties Ltd | Real estate | 2021 |
| F and G Property Ltd | Real estate | 2022 |
| Falcon FOX Limited | Health & social care | 2022 |
| Falloon Brothers (Lisburn) Limited | Agriculture & fishing | 1970 |
| Fauna Hospitality Ltd | Hospitality | 2025 |
| Federation of Family Practices Lisburn C.I.C. | Health & social care | 2015 |
| Ferguson Memorial Museum Ltd | Arts & recreation | 2025 |
| Fettle Fitness Education Ltd | Education | 2024 |
| FL Developments Limited | Manufacturing | 2011 |
| Flipping Stacks Ltd | Wholesale & retail | 2022 |
| Flowerday Properties Ltd | Real estate | 2021 |
| Flowerday Property Management LLP | | 2019 |
| Flows 2 Forms Ltd | Information & communication | 2019 |
| Foot and Ankle Professional Solutions Limited | Health & social care | 2010 |
| Found & Formed LLP | | 2018 |
| FWB Electrical & Catering Ltd | Manufacturing | 2022 |
| G & H Bell (Life & Pensions) Limited | Financial services | 2004 |
| G & H Bell (Properties) Limited | Real estate | 1928 |
| G&H Shed Ltd | Construction | 2018 |
| GGS Construction Hillsborough Ltd | Construction | 2025 |
| GIP Management Services Limited | Professional & scientific | 2015 |
| Gldn Group Limited | Wholesale & retail | 2025 |
| Glebe Equine Ltd | Agriculture & fishing | 2025 |
| Glebe Homes Limited | Construction | 2013 |
| Gleeson N.I. Limited | Wholesale & retail | 2004 |
| Glen Dairy Farms Limited | Agriculture & fishing | 2023 |
| Global Lubricants NI Limited | Wholesale & retail | 2006 |
| GML Enterprises Ltd | Professional & scientific | 2023 |
| Go SOW | Other services | 2021 |
| Goldflyer Developments Ltd | Construction | 2001 |
| Goldflyer Properties Ltd | Professional & scientific | 1998 |
| Gorse and Thistle Ltd | Administrative & support | 2024 |
| Gortcalley Property Management Ltd | Real estate | 2024 |
| Goshen Developments Limited | Construction | 2006 |
| Grace Communications N.I. Ltd | Information & communication | 2010 |
| Graham Asset Management Limited | Administrative & support | 2008 |
| Graham Investment Projects Limited | Administrative & support | 2009 |
| Green Linen Limited | Real estate | 2015 |
| Greer Estates Group Limited | Real estate | 2024 |
| Greer the Blue House Ltd | Hospitality | 2020 |