| NL000768 LP | | 2020 |
| NL000770 LP | | 2020 |
| NL000779 LP | | 2020 |
| NL000783 LP | | 2020 |
| NL000789 LP | | 2021 |
| NL000792 LP | | 2021 |
| NL000793 LP | | 2021 |
| NL000795 LP | | 2021 |
| NL000796 LP | | 2021 |
| NL000802 LP | | 2021 |
| NL000823 LP | | 2021 |
| NL000824 LP | | 2021 |
| NL000825 LP | | 2021 |
| NL000834 LP | | 2022 |
| NL000853 LP | | 2022 |
| NL00086 LP | | 2014 |
| NM Construction & Carpentry Limited | Construction | 2026 |
| NM Painting Ltd | Construction | 2023 |
| NMC Carpentry & Construction Ltd | Construction | 2016 |
| Nmfs Limited | Administrative & support | 2014 |
| NMK Electrical (NI) Limited | Construction | 2013 |
| NN Turkish Barber Ltd | Other services | 2026 |
| Nobekari Ltd | Information & communication | 2026 |
| Noireland International Crime Fiction Festival CIC | Education | 2019 |
| NOR Construction Services Ltd | Professional & scientific | 2025 |
| Norbrook Laboratories Limited | Manufacturing | 1969 |
| Nordmile Capital L.P. | | 2017 |
| Noreast Beers (N.I.) Ltd | Wholesale & retail | 1983 |
| Noreast Holdings (N.I.) Ltd | Professional & scientific | 2022 |
| Norlect Engineering (UK) Ltd | Construction | 1994 |
| North Channel Wind Limited | Construction | 2022 |
| North East Accommodation Ltd | Hospitality | 2023 |
| North Side Automobile Sales Ltd | Wholesale & retail | 2025 |
| North South Coffee Company Ltd | Manufacturing | 2006 |
| North South Plant Hire Limited | Administrative & support | 2022 |
| North South PVC Ltd | Construction | 2011 |
| North South Wholesale Ltd | Wholesale & retail | 2021 |
| North West Student & Youth Community Radio Limited | Wholesale & retail | 2017 |
| Northbridge Automotive Limited | Wholesale & retail | 2026 |
| Northern Bonded Ltd | Transport & logistics | 2021 |
| Northern Candles Limited | Manufacturing | 1982 |
| Northern Hills Limited | Information & communication | 2015 |
| Northern Ireland Community Development Health Network Ltd | Administrative & support | 1998 |
| Northern Motor Components Ltd | Wholesale & retail | 2016 |
| Northern Star Genetics Limited | Agriculture & fishing | 2021 |
| Northlake Car Sales Ltd | Wholesale & retail | 2025 |
| Northland Developments ( C & T ) Limited | Construction | 2014 |
| Northside Leisure Ltd | Real estate | 2018 |
| Northsouth Supplies Limited | Wholesale & retail | 2021 |
| Northway Inspection Ltd | Professional & scientific | 2026 |
| Norwood Property Developments Limited | Extraterritorial | 2006 |
| Notaedan Limited | Health & social care | 2013 |
| Note Events Ltd | Arts & recreation | 2020 |
| Nourish Food Catering Ltd | Manufacturing | 2020 |
| Nova Control Solutions Limited | Information & communication | 2026 |
| Nova Growth Group Limited | Professional & scientific | 2025 |
| Novaneoeng LP | | 2022 |
| Novara (2026) Limited | Financial services | 2026 |
| Novoamex L.P. | | 2017 |
| Novotel Projects L.P. | | 2017 |
| NPB Contracts Ltd | Construction | 2016 |
| NPC Bricklaying Ltd | Construction | 2020 |
| NPD Investments Limited | Professional & scientific | 2013 |
| NQS Consultants Ltd | Professional & scientific | 2021 |
| NR Caterers (N.I) Ltd | Hospitality | 2026 |
| NRG Source Ltd | Real estate | 2011 |
| NRG Windows Ltd | Construction | 2022 |
| NRS Group (NI) Limited | Construction | 2015 |
| NS Vehicle Sales Ltd | Wholesale & retail | 2022 |
| NS4X4 UK Ltd | Wholesale & retail | 2022 |
| Ntalale Services Limited | Health & social care | 2022 |
| NTH Haulage Ltd | Transport & logistics | 2015 |
| Nu-Clean Services Ltd | Administrative & support | 2021 |
| Nuada Ltd | Health & social care | 2009 |
| Nugent Carpentry and Construction Ltd | Manufacturing | 2024 |
| Nugent Plant Hire Ltd | Administrative & support | 2024 |
| Numac Estates Ltd | Professional & scientific | 2020 |
| Numac Fabrications Ltd | Manufacturing | 2013 |
| Number 7 Catering Limited | Hospitality | 2018 |
| Nutherm Renewables Ltd | Construction | 2014 |
| Nutrimental Fitness Ltd | Arts & recreation | 2024 |
| NV Transport Newtown Ltd | Transport & logistics | 2019 |
| NWD Property Limited | Real estate | 2021 |
| O & F K Ltd | Wholesale & retail | 2007 |
| O Hamill Property Ltd | Real estate | 2021 |
| O Mcanena Medical Limited | Health & social care | 2011 |
| O R B Property Services Limited | Real estate | 2013 |
| O' Gorman Car Sales Ltd | Wholesale & retail | 2016 |
| O'Brien Developments & Construction Limited | Construction | 2019 |
| O'Callaghan & Sons Limited | Construction | 2023 |
| O'Callaghan Planning Limited | Professional & scientific | 2021 |
| O'Conn Catering Ltd | Hospitality | 2022 |
| O'Connor Murray Limited | Professional & scientific | 2023 |
| O'Hagan & Madden Ltd | Construction | 2005 |
| O'Hagan & Murray Limited | Health & social care | 2009 |
| O'Hagan Developments Limited | Construction | 2010 |
| O'Hagan Plant Ltd | Administrative & support | 2019 |
| O'Hagan Property Limited | Construction | 2000 |
| O'Hanlon & Farrell Contracts Ltd | Construction | 1997 |
| O'Hanlon & Farrell Electrical Limited | Construction | 2015 |