| Nina's Nails & Spa Ltd | Other services | 2024 |
| Nina-Adonai Ltd | Health & social care | 2017 |
| Nine Gillespie Place Ltd | Health & social care | 2025 |
| Nine Realms CIC | Arts & recreation | 2023 |
| NINETEEN25 Group Limited | Professional & scientific | 2024 |
| Ninety Nine Oscar Charlie Ltd | Hospitality | 2023 |
| Ninety SIX Marketing Ltd | Administrative & support | 2023 |
| Ningaloo Limited | Health & social care | 2022 |
| Ninoteks Commerce LP | | 2014 |
| Ninth & Arden Limited | Information & communication | 2013 |
| Nip's Bottle Shop Ltd | Wholesale & retail | 2023 |
| Niparo Ltd | Information & communication | 2020 |
| Niro Impex LP | | 2015 |
| Nirpa Wellbeing and Healthcare Limited | Health & social care | 2015 |
| Nirvexa Limited | Hospitality | 2025 |
| Nisbets Solicitors Limited | Professional & scientific | 2016 |
| Nishika Limited | Hospitality | 2024 |
| Nishiki Ltd | Hospitality | 2024 |
| Niskok Services LP | | 2019 |
| Nisr Ltd | Administrative & support | 2025 |
| Nissioasis Ltd | Wholesale & retail | 2019 |
| Nista Group LP | | 2016 |
| Nisus Barbers Ltd | Other services | 2026 |
| Nitech Solutions Limited | Manufacturing | 2003 |
| Nitra Finance LP | | 2017 |
| Nitro Plus LP | | 2015 |
| Nitrogen Agencies Limited | Agriculture & fishing | 2009 |
| Nivaan Technologies Limited | Information & communication | 2023 |
| Nival Logistics LP | | 2016 |
| Nivata Ltd | Professional & scientific | 2024 |
| Nividatech Ltd | Wholesale & retail | 2024 |
| Niwahana Ltd | Real estate | 2023 |
| Niwalen Limited | Professional & scientific | 2010 |
| Nixelt Ventures LP | | 2015 |
| Nixon Corporation L.P. | | 2009 |
| Nixon Surgical Limited | Health & social care | 2018 |
| Nixos GSF Ltd | Hospitality | 2022 |
| Nixton Overseas LP | | 2014 |
| Niyyat Traders Ltd | Wholesale & retail | 2025 |
| Nizami Enterprises Limited | Transport & logistics | 2018 |
| Nizz Project Ltd | Wholesale & retail | 2026 |
| Niñoverse Ltd | Manufacturing | 2022 |
| NJ Holding LP | | 2019 |
| NJ Mansour Ltd | Real estate | 2022 |
| NJB Advisory Limited | Professional & scientific | 2021 |
| NJC Dalry Ltd | Hospitality | 2026 |
| Njccafes Ltd | Hospitality | 2026 |
| Njcmp Ltd | Hospitality | 2026 |
| NJF Contracting Limited | Professional & scientific | 2024 |
| NJM Group Holdings Ltd | Mining & quarrying | 2017 |
| Njmh Limited | Real estate | 2022 |
| Njord Partners (Scotland) Limited | Financial services | 2019 |
| Njord Partners Special Situations Co-Invest LP | | 2019 |
| Njoy Mini Mart Ltd | Wholesale & retail | 2019 |
| NJR Trading Limited | Hospitality | 2009 |
| NK & Co Flawless Aesthetics Ltd | Other services | 2025 |
| NK Comms Ltd | Professional & scientific | 2023 |
| NK Essential Solutions Ltd | Construction | 2014 |
| NK Everest Limited | Hospitality | 2013 |
| NK Property & Real Estate Ltd | Hospitality | 2025 |
| NKD Pizza Edinburgh Limited | Hospitality | 2017 |
| NKH Contractors Ltd | Wholesale & retail | 2019 |
| Nkhan Properties Ltd | Real estate | 2026 |
| Nkkw Limited | Hospitality | 2025 |
| NKL Properties Ltd | Real estate | 2018 |
| Nklk Ltd | Wholesale & retail | 2025 |
| NKT Security Ltd | Administrative & support | 2023 |
| NL Logistics LP | | 2015 |
| Nlei Ltd | Energy | 2015 |
| NLM Holdings Limited | Real estate | 2021 |
| NLM Pro Ltd | Real estate | 2025 |
| NLT Assets L.P. | | 2016 |
| NLX Scot Ltd | Wholesale & retail | 2019 |
| NM Controls Ltd | Professional & scientific | 2021 |
| NM Property Development Limited | Construction | 2017 |
| Nmanu Original Trading Ltd | Wholesale & retail | 2026 |
| Nmcl Ltd | Professional & scientific | 2020 |
| Nmfp Procurement Limited | Information & communication | 2024 |
| NMG Consultancy Ltd | Professional & scientific | 2024 |
| NMS Design Limited | Information & communication | 2024 |
| NMS Enterprises Limited | Wholesale & retail | 1997 |
| NMT Group Limited | Administrative & support | 1996 |
| NNG Windfarm Holdings Limited | Energy | 2018 |
| NO 1 Healthcare Housing Support Services Ltd | Administrative & support | 2023 |
| NO 1 Healthcare London Ltd | Health & social care | 2025 |
| NO 1 Healthcare Ltd | Other services | 2017 |
| NO 1 High Street Limited | Hospitality | 2011 |
| NO 1 People Ltd | Other services | 2019 |
| NO Boundaries School CIC | Education | 2015 |
| NO Diet FAT Loss Ltd. | Other services | 2024 |
| NO Logo Media Limited | Professional & scientific | 2017 |
| NO Offence Tours Limited | Administrative & support | 2026 |
| NO Password Required Ltd | Education | 2026 |
| NO Pollution Industrial Systems Limited | Manufacturing | 2007 |
| NO Stress Pet Solutions Limited | Professional & scientific | 2023 |
| NO. 1 New America Art Fund, L.P. | | 2006 |
| NO. 33 Interiors Ltd | Real estate | 2026 |
| NOA Partners LP | | 2017 |
| Noah Elon Ltd | Wholesale & retail | 2026 |
| Noaro Commercial LP | | 2015 |