| Noors Hair Salon Ltd | Other services | 2024 |
| Noors Meesum Barber Ltd | Other services | 2016 |
| Noorul Healthcare Ltd | Wholesale & retail | 2019 |
| Nora Holdings Limited | Financial services | 2025 |
| Nordholt Investments Limited | Professional & scientific | 1998 |
| Nordic Consulting Services Ltd | Education | 2019 |
| Noreen Rose Limited | Professional & scientific | 2015 |
| Norfolk Square Estates Ltd | Real estate | 2024 |
| Norid Property Ltd | Real estate | 2025 |
| Norman House Holdings Ltd | Financial services | 2020 |
| Normandy Roofing Services Limited | Construction | 2023 |
| Norms Decor Limited | Construction | 2015 |
| Norms Estates Limited | Real estate | 2020 |
| Nortab Ltd | Real estate | 2025 |
| North ARC Limited | Real estate | 2017 |
| North Camp Management Ltd | Households | 2018 |
| North East Logistics & Warehousing Limited | Transport & logistics | 2026 |
| North Finchley Foods Ltd | Wholesale & retail | 2024 |
| North Harrow Nursery Limited | Other services | 2002 |
| North Harrow Properties Limited | Real estate | 2018 |
| North Harrow Scissors Hand Ltd | Other services | 2024 |
| North London Stars Ltd | Arts & recreation | 2022 |
| North South Network Security Consultants Limited | Information & communication | 2026 |
| North Star IT Ltd | Information & communication | 2020 |
| North Star London Ltd | Construction | 2016 |
| North Star Marine Consultancy Limited | Professional & scientific | 2024 |
| North West London Electric Ltd | Extraterritorial | 2021 |
| Northacres Partnership Limited | Administrative & support | 2016 |
| Northampton Peri Peri Bites Ltd | Hospitality | 2024 |
| Northants Property Management Ltd | Households | 2020 |
| Northcote Investments Limited | Administrative & support | 2023 |
| Northdowns Developments Ltd | Construction | 2020 |
| Northern Star Capital Limited | Real estate | 2020 |
| Northern Starjets UK Ltd | Transport & logistics | 2013 |
| Northerns Property Ltd | Real estate | 2026 |
| Northex Ltd | Construction | 1997 |
| Northgate Developments Limited | Construction | 2023 |
| Northleaf Limited | Information & communication | 2006 |
| Northleaf Properties Limited | Real estate | 2021 |
| Northpoint (Bromley) Management Company Limited | Households | 1999 |
| Northpoint Properties Ltd | Real estate | 2015 |
| Northshore Construction Limited | Construction | 2007 |
| Northstarconsultancylondon Ltd | Hospitality | 2026 |
| Northvale Builderswork Limited | Construction | 2022 |
| Northvale Construction Group Ltd | Financial services | 2026 |
| Northvale Construction Ltd | Construction | 2008 |
| Northway House Energy Management Company Limited | Households | 2015 |
| Northway House Management Company Limited | Households | 2015 |
| Northwest Consultants Ltd | Administrative & support | 2016 |
| Northwest Eats Limited | Information & communication | 2020 |
| Northwest Heating & Plumbing Ltd | Wholesale & retail | 2013 |
| Northwest Orthodontists Limited | Health & social care | 2011 |
| Northwestern Engineering and Commercial Operator Services Limited | Manufacturing | 2012 |
| Northwick Investments Ltd | Financial services | 2019 |
| Northwick Park Institute for Medical Research | Professional & scientific | 1997 |
| Northwild Commerce Limited | Wholesale & retail | 2026 |
| Northwood Paper UK Limited | Wholesale & retail | 2008 |
| Northworks Studio Limited | Professional & scientific | 2023 |
| Norty Drinks Ltd | Wholesale & retail | 2023 |
| Norvex Consulting Limited | Professional & scientific | 2024 |
| Norwich Oasis Residential Association Ltd | Households | 2026 |
| Norwood Green Residential Ltd | Real estate | 2019 |
| Nory’S Beauty Limited | Other services | 2019 |
| NOT Another Consultant Limited | Professional & scientific | 2021 |
| NOT in the Guidebooks Limited | Information & communication | 2017 |
| Notesvilla - Lamplight Holding Ltd. | Wholesale & retail | 2020 |
| Notion Events Limited | Other services | 2019 |
| Notorious Mykonos Limited | Extraterritorial | 2012 |
| Notting Hill Gift Shop Ltd | Wholesale & retail | 2019 |
| Notting Hill Hostel Ltd. | Administrative & support | 2017 |
| Nougie Film Limited | Information & communication | 2022 |
| Noura Catering Limited | Financial services | 1999 |
| Noura Kingston Limited | Hospitality | 2021 |
| Nourish Gateway Ltd | Wholesale & retail | 2025 |
| Nourishbysk Ltd | Hospitality | 2018 |
| Nourissentials UK Limited | Wholesale & retail | 2023 |
| NOV Interiors Limited | Construction | 2018 |
| Nov-X Limited | Information & communication | 2024 |
| Nova 360 Solutions Ltd | Professional & scientific | 2024 |
| Nova Astra Holdings Ltd | Real estate | 2026 |
| Nova Building Ltd | Construction | 2025 |
| Nova Care Surgical Ltd | Health & social care | 2025 |
| Nova CUT Hairstylist Ltd | Other services | 2025 |
| Nova Fades Ltd | Other services | 2023 |
| Nova MOB Ltd | Manufacturing | 2018 |
| Nova Outdoor Solutions Holdings Limited | Financial services | 2021 |
| Nova Outdoor Solutions Limited | Construction | 2009 |
| Nova Smart FBA Limited | Wholesale & retail | 2024 |
| Nova Technolabs Ltd | Information & communication | 2023 |
| Nova VCL Projects Limited | Construction | 2024 |
| Nova-Speed Ltd | Wholesale & retail | 2023 |
| Novabend Solutions Limited | Information & communication | 2015 |
| Novaklad Install Services Limited | Construction | 2019 |
| Novalta Partners Limited | Professional & scientific | 2025 |
| Novanet Limited | Professional & scientific | 2023 |
| Novara Properties Limited | Real estate | 2018 |
| Novastorm Limited | Real estate | 2015 |
| Novavec Ltd | Information & communication | 2026 |
| Novelties Direct (Parties) Limited | Manufacturing | 2003 |
| Novelties Direct Limited | Extraterritorial | 2005 |