| Messagematic Ltd | Administrative & support | 2019 |
| Metalville Ltd | Administrative & support | 2019 |
| Mill Road (Kilkeel) Management Limited | Households | 2017 |
| Miller Wicks (N.I.) Limited | Manufacturing | 2005 |
| Moodelica Ltd | Transport & logistics | 2019 |
| Mornweigh Ltd | Health & social care | 2024 |
| Mourne Architectural Design Ltd | Professional & scientific | 2021 |
| Mourne Marine Surveys Limited | Manufacturing | 2010 |
| Mourne Memories Limited | Manufacturing | 2005 |
| Mysticbunny Ltd | Transport & logistics | 2019 |
| NA Cairde Oisri Limited | Wholesale & retail | 2023 |
| Neptunes Kilkeel Ltd | Hospitality | 2026 |
| New Beginnings Charitable Foundation | Health & social care | 2015 |
| Newell Property Ltd | Real estate | 2018 |
| Newry Street Unite Limited | Arts & recreation | 2020 |
| NI Marketing Solutions Ltd | Professional & scientific | 2024 |
| Novelmoney Ltd | Transport & logistics | 2019 |
| Nunton Ltd | Administrative & support | 2021 |
| O'Reilly Mechanical Installations Ltd | Construction | 2020 |
| OH SO Lean Ltd | Manufacturing | 2013 |
| Onvolve Ltd | Administrative & support | 2019 |
| P H Elite Events Limited | Arts & recreation | 2019 |
| Patrons International | Other services | 2019 |
| Periberis Ltd | Transport & logistics | 2019 |
| PFA Holdings Limited | Financial services | 2023 |
| Pison Innovations C.I.C. | Professional & scientific | 2015 |
| Pitstop Fastfood Limited | Hospitality | 2015 |
| Planet ABC CIC | Health & social care | 2023 |
| Porolissum Ltd | Transport & logistics | 2022 |
| Providence Wealth Management Ltd | Real estate | 2014 |
| Qualen Ltd | Transport & logistics | 2019 |
| RAS Haulage Limited | Transport & logistics | 2013 |
| Red Kite Planning Solutions Ltd | Professional & scientific | 2025 |
| Renew and Flourish Ltd | Real estate | 2021 |
| Retainusers Ltd | Administrative & support | 2019 |
| Rhagon Ltd | Transport & logistics | 2019 |
| Riggith Ltd | Transport & logistics | 2019 |
| Riglarlic Ltd | Transport & logistics | 2019 |
| River Valley Development Association Limited | Hospitality | 1995 |
| Riverside Kilkeel Management Limited | Households | 2022 |
| Riverview Fishing Limited | Agriculture & fishing | 2010 |
| Rooney Fish Limited | Manufacturing | 2017 |
| Ryan ORR Fishing Company Limited | Agriculture & fishing | 2014 |
| Schomberg Society Kilkeel Limited | Other services | 2002 |
| Scrub a PUP Ltd | Other services | 2025 |
| Seacliff Fishing Ltd | Agriculture & fishing | 2014 |
| Serenity Tiles (NI) Ltd | Wholesale & retail | 2013 |
| Sethrazy Ltd | Construction | 2023 |
| Shepyer Ltd | Transport & logistics | 2019 |
| Shouldersdoomed Ltd | Transport & logistics | 2019 |
| Siccoshell Ltd | Transport & logistics | 2019 |
| Siddirika Ltd | Transport & logistics | 2019 |
| SJ Contracts Ltd | Construction | 2020 |
| Skin Kerr Limited | Health & social care | 2017 |
| Skythroat Ltd | Administrative & support | 2019 |
| Soggishell Ltd | Manufacturing | 2019 |
| Sokemeric Ltd | Wholesale & retail | 2019 |
| SP Spence Ltd | Transport & logistics | 2016 |
| Spaldwick Ltd | Transport & logistics | 2021 |
| Spiers Contracts Limited | Construction | 2008 |
| Springfield Shooting Academy Ltd | Arts & recreation | 2015 |
| SS Owen Ltd | Administrative & support | 2021 |
| SSA Fishing Limited | Agriculture & fishing | 2018 |
| Steamflight Ltd | Manufacturing | 2019 |
| Strathearn Livestock Limited | Agriculture & fishing | 2017 |
| Stronggust Ltd | Transport & logistics | 2019 |
| Supreme Fishing Company Limited | Agriculture & fishing | 1988 |
| Sweetiebubblegum Ltd | Transport & logistics | 2019 |
| T Hanna Building Limited | Construction | 2024 |
| T Hanna Property Ltd | Real estate | 2021 |
| T W Newell Farms Ltd | Agriculture & fishing | 2016 |
| Tabila Ltd | Transport & logistics | 2019 |
| Tagabox Ltd | Transport & logistics | 2019 |
| Tagliacozzo Ltd | Transport & logistics | 2022 |
| Takuforts Ltd | Transport & logistics | 2022 |
| Tecksash Ltd | Transport & logistics | 2019 |
| TH Nicholson and Mourne Seafoods Limited | Wholesale & retail | 2026 |
| Torvic Properties Ltd | Extraterritorial | 2014 |
| Trevor Spiers ENG. Ltd | Manufacturing | 2014 |
| Valiantjam Ltd | Manufacturing | 2019 |
| Valiantrunner Ltd | Transport & logistics | 2019 |
| Valuegiant Ltd | Transport & logistics | 2019 |
| VF Foodservice Limited | Hospitality | 2017 |
| VN Kelly Ltd | Transport & logistics | 2021 |
| Voroeus Ltd | Transport & logistics | 2019 |
| White Colne Ltd | Administrative & support | 2021 |
| Wild Bay Property Ltd | Real estate | 2026 |
| Wild Bay Seafood Limited | Real estate | 2021 |
| Winkfield ROW Ltd | Administrative & support | 2021 |
| WY Drew Ltd | Administrative & support | 2021 |
| Yenyrea Ltd | Transport & logistics | 2019 |