| 35 TAN Ltd | Other services | 2022 |
| A & H Coating Inspections Limited | Professional & scientific | 2010 |
| A&R International Logistics Ltd | Transport & logistics | 2019 |
| Abbey Grappling Ltd | Education | 2026 |
| Aiston Consultancy Services Limited | Information & communication | 2024 |
| ALL 8S Local Taxi Services Ltd | Transport & logistics | 2020 |
| Appletree Property Investments Ltd | Real estate | 2020 |
| Appletree Property Limited | Real estate | 2018 |
| Arch-Viz Limited | Professional & scientific | 2007 |
| Arcticcleanse Ltd | Wholesale & retail | 2024 |
| Ards Antiques & Art Ltd | Wholesale & retail | 2019 |
| Ards Dance Centre Ltd | Arts & recreation | 2021 |
| Ascent Development Management (NI) Limited | Professional & scientific | 2025 |
| Atlas People Ltd. | Administrative & support | 2024 |
| Back to Earth Limited | Agriculture & fishing | 2024 |
| Ballyfrenis Footwear Limited | Wholesale & retail | 2026 |
| Ballyfrenis Investment Limited | Financial services | 2024 |
| Ballyfrenis Property Limited | Real estate | 2024 |
| Bay of Bengal DD Ltd | Hospitality | 2024 |
| Beaux Baby Boutique Ltd | Wholesale & retail | 2017 |
| Blade Construction Group Ltd | Construction | 2022 |
| Booktastic Network CIC | Education | 2024 |
| BOW Bells Donaghadee Ltd | Hospitality | 2020 |
| Bowdee Ltd | Real estate | 2023 |
| BP Property & Lettings Ltd | Real estate | 2025 |
| Bradwood Limited | Health & social care | 1996 |
| BVS Education Limited | Education | 2012 |
| BWT (NI) Limited | Water & waste | 2012 |
| Cairnview Property Limited | Construction | 2019 |
| Captains Table Donaghadee Ltd | Hospitality | 2023 |
| Carpetni Ltd | Construction | 2023 |
| Castlecreek Lettings Ltd | Real estate | 2021 |
| CDL Claims Services Ltd | Financial services | 2022 |
| Clarke IS Ltd | Professional & scientific | 2021 |
| Coastlands Ballyhalbert Management Company Limited | Real estate | 2025 |
| Conscious Locations Limited | Information & communication | 2018 |
| Copeland Distillery Company (NI) Ltd | Extraterritorial | 2018 |
| Copeland Spirits Ltd | Manufacturing | 2015 |
| Cotton Tails Farm Ltd | Agriculture & fishing | 2024 |
| County Hardware DEE Limited | Wholesale & retail | 2022 |
| Court Electrics Solutions Ltd | Administrative & support | 2014 |
| Cream Cafe Limited | Hospitality | 2019 |
| Creative Gardens Food (NI) Limited | Manufacturing | 2025 |
| Croc Consulting Ltd | Professional & scientific | 2023 |
| Croc Golf Ltd | Wholesale & retail | 2023 |
| Cryotherapy (Ireland) Limited | Other services | 2017 |
| Currie Labelling Solutions Limited | Manufacturing | 1995 |
| D & L Diamond Limited | Hospitality | 2014 |
| DAM Contracts Ltd | Construction | 2024 |
| DEE Indian Limited | Hospitality | 2019 |
| Deercreek Limited | Hospitality | 2015 |
| Delphi Productions Limited | Information & communication | 2024 |
| Digital Steam Ltd | Information & communication | 2016 |
| Digitalhope Limited | Information & communication | 2025 |
| Donaghadee Heritage Preservation Company | Arts & recreation | 2016 |
| Donaghadee Tyres Ltd | Wholesale & retail | 2023 |
| Down Wholesale Limited | Wholesale & retail | 2009 |
| DRH ENG Services Ltd | Professional & scientific | 2024 |
| E Howell Painting Ltd | Construction | 2015 |
| Eat@Cod Limited | Real estate | 2021 |
| Eatwell Engineering Ltd | Professional & scientific | 2015 |
| Emerald Insights Ltd | Professional & scientific | 2023 |
| Fastnet Ventures I LP | | 2012 |
| Final Take Ltd | Wholesale & retail | 2024 |
| Fjord Films Limited | Information & communication | 2020 |
| Freedom Movement Ltd | Information & communication | 2026 |
| Fufil Ltd | Information & communication | 2025 |
| Further North Ltd | Administrative & support | 2018 |
| Garden Leisure(Ni) Ltd | Wholesale & retail | 2012 |
| Gassco Holdings (NI) Limited | Financial services | 2025 |
| Gassco Property Limited | Real estate | 2020 |
| GDP Ltd | Professional & scientific | 2017 |
| Geddis Developments Limited | Construction | 1988 |
| Getaway Cabs Ltd | Transport & logistics | 2026 |
| Glasnostics Computing Limited | Information & communication | 1994 |
| Gold Coast Arcadia Ltd | Wholesale & retail | 2024 |
| Governor Rocks Ltd | Real estate | 2019 |
| Grace Neill's Limited | Real estate | 2003 |
| Grange Wine Merchants (Donaghadee) Limited | Wholesale & retail | 2016 |
| Green Room Florist NI Ltd | Wholesale & retail | 2025 |
| Greenhouses(Ni) Ltd | Wholesale & retail | 2020 |
| Greyabbey Limited | Hospitality | 2003 |
| Halliday Financial Guidance Limited | Financial services | 2007 |
| Harbour Court Apartments Management Company Limited | Extraterritorial | 1989 |
| Harry Homes 777 Limited | Real estate | 2025 |
| Haysen Harbour Hounds Ltd | Extraterritorial | 2024 |
| Hegan House Ltd | Real estate | 2026 |
| Hern HOG Films Ltd | Information & communication | 2025 |
| Herrons of Donaghadee Ltd | Wholesale & retail | 2017 |
| Hive Effects Ltd | Professional & scientific | 2024 |
| Hoist Assisted Holidays C.I.C. | Hospitality | 2022 |
| Homecare & Nursing Services Ltd | Health & social care | 1999 |
| Hugh Drennan and Sons Limited | Manufacturing | 2014 |
| Infosecservices Limited | Information & communication | 2014 |
| J Young Consulting Ltd | Administrative & support | 2014 |
| J. Wright & SON Butchers Ltd | Wholesale & retail | 2021 |
| JAX Hair and Beauty Ltd | Other services | 2016 |
| JHF Enterprises Ltd | Hospitality | 2013 |
| JK Drylining Ltd | Construction | 2015 |
| Johnston Graham Limited | Professional & scientific | 2003 |