| NO1 Rentals Limited | Real estate | 2012 |
| NO7 Legal Services Ltd | Administrative & support | 2019 |
| NO: 33 Properties Limited | Real estate | 2026 |
| Noaggro.Com Limited | Information & communication | 2011 |
| Noah’S ARK Housing Limited | Real estate | 2026 |
| Nobel K9 & Facilities Management Ltd | Administrative & support | 2026 |
| Noble Automotive Ltd. | Manufacturing | 1999 |
| Noble Day Associates Limited | Administrative & support | 2018 |
| Noble Faith Limited | Professional & scientific | 2015 |
| Noble Nest Financial Consultants Limited | Financial services | 2024 |
| Nobotchat Limited | Information & communication | 2020 |
| Nociro Holding Limited | Real estate | 2017 |
| Noctis Studios Limited | Information & communication | 2026 |
| Node Urban Design Ltd | Professional & scientific | 2011 |
| Node Zero Limited | Construction | 2006 |
| Node-Links Holdings Limited | Financial services | 2023 |
| Noelle Ltd | Wholesale & retail | 2021 |
| Noelson & Jeffery Ltd | Hospitality | 2026 |
| Noetic Ltd | Professional & scientific | 2024 |
| Nofacesafespace Ltd | Professional & scientific | 2026 |
| Noir-Oracle Ltd. | Wholesale & retail | 2018 |
| Nolimitclothing Ltd | Extraterritorial | 2024 |
| Nolimitjeans Ltd | Extraterritorial | 2024 |
| Nomad Bistro Cafe Ltd | Hospitality | 2020 |
| Nomad Cafe Ltd | Hospitality | 2016 |
| Nomad Capital Developments Ltd | Real estate | 2025 |
| Nomad Express Ltd | Wholesale & retail | 2024 |
| Nomad Flow Limited | Information & communication | 2020 |
| Nomad Investments Limited | Hospitality | 2024 |
| Nomads Clothing Limited | Wholesale & retail | 2000 |
| Nomis Cleaning Ltd | Administrative & support | 2020 |
| Nommie's Logistics Ltd | Transport & logistics | 2024 |
| Nomon Ltd | Information & communication | 2025 |
| Noms Properties Ltd | Real estate | 2020 |
| NON Trading GP Landlord Cleaning Services Ltd | Administrative & support | 2019 |
| NON Trading Growth Partners 001 Limited | Administrative & support | 2017 |
| Nono Purchasing Ltd | Transport & logistics | 2025 |
| Nonso HC Limited | Professional & scientific | 2023 |
| NOO Properties Ltd | Real estate | 2014 |
| Nood Trading Ltd | Wholesale & retail | 2021 |
| Noodle Village Ltd | Hospitality | 2024 |
| NOODLEBAR2016 Limited | Hospitality | 2016 |
| Nook Corner Coffee Shop Limited | Hospitality | 2011 |
| Nook Properties (Leicester) Limited | Real estate | 2022 |
| Noor Builders Leicester Ltd | Construction | 2025 |
| Noor City Bikes Ltd | Manufacturing | 2025 |
| Noor Datoo Engineering Ltd | Professional & scientific | 2010 |
| Noor E Muhammadi Limited | Wholesale & retail | 2025 |
| Noor Enterprise Ltd | Administrative & support | 2014 |
| Noor Groceries Ltd | Wholesale & retail | 2022 |
| Noor LET Properties Limited | Real estate | 2026 |
| Noor Luxe Properties Ltd | Real estate | 2025 |
| Noor Medical Ltd | Health & social care | 2024 |
| Noor Naan House Ltd | Hospitality | 2025 |
| Noor Newparks Ltd | Wholesale & retail | 2026 |
| Noor Productions Ltd | Information & communication | 2024 |
| Noorani Academy | Education | 2017 |
| Noorani Ltd | Health & social care | 2018 |
| Noorzay Limited | Wholesale & retail | 2023 |
| Nora Draper Limited | Manufacturing | 2011 |
| Norah Cafe Restaurent Ltd | Hospitality | 2018 |
| Norarch Limited | Other services | 2012 |
| Norayn Cafe Limited | Hospitality | 2023 |
| Norbryght Farm Limited | Real estate | 2019 |
| Norbusystems Ltd | Information & communication | 2018 |
| Nordcrest Stone Ltd | Real estate | 2026 |
| Nordic Electrum Ltd | Extraterritorial | 2017 |
| Nordic Group LP | | 2017 |
| Nordic Kolektive Investment Limited | Professional & scientific | 2019 |
| Nordic Projects LP | | 2018 |
| Nordic Seed Design Limited | Wholesale & retail | 2018 |
| Nordmark LP | | 2017 |
| Norfolk Holiday Lettings Limited | Hospitality | 2020 |
| Norford Properties Ltd | Real estate | 2017 |
| Norjas Ltd | Agriculture & fishing | 2018 |
| Norjay Limited | Professional & scientific | 1962 |
| Norland Place (Flat 2) Limited | Real estate | 2023 |
| Norlyn Properties Ltd | Real estate | 2024 |
| Normanton Trading Ltd | Wholesale & retail | 2026 |
| Normantonroad Cakes Ltd | Wholesale & retail | 2024 |
| Normix Ltd | Wholesale & retail | 2025 |
| Norray Joinery Limited | Construction | 2000 |
| Norsemen Ltd | Construction | 2020 |
| North 24FITNESS Limited | Arts & recreation | 2021 |
| North Alarms Limited | Administrative & support | 2018 |
| North Block Capital Limited | Financial services | 2018 |
| North Bramham Ltd | Real estate | 2025 |
| North by North Productions Ltd | Professional & scientific | 2011 |
| North Creative Co. Ltd. | Information & communication | 2010 |
| North Lodge Farm (Old Dalby) Management Company Limited | Real estate | 2020 |
| North Point Homes Ltd | Real estate | 2026 |
| North Ridge Anaesthetic Services Limited | Health & social care | 2022 |
| North Shropshire Voluntary Action | Arts & recreation | 2001 |
| North Star Resilience Ltd | Professional & scientific | 2026 |
| North Star Strategies Ltd | Construction | 2025 |
| North Street Apartments Ltd | Hospitality | 2024 |
| North Supply Limited | Information & communication | 1998 |
| North to South Legal Limited | Administrative & support | 2025 |
| Northampton GUT Clinic Ltd | Health & social care | 2014 |
| Northamptonshire Care Limited | Health & social care | 2020 |