| NO 1 Developments Limited | Real estate | 2011 |
| NO 1 Holles Crescent Management Limited | Households | 1991 |
| NO 22 Fish and Chip Ltd | Hospitality | 2026 |
| NO 8 Properties Ltd | Real estate | 2019 |
| NO Angel Ltd | Administrative & support | 2005 |
| NO BS Advertising Ltd | Professional & scientific | 2023 |
| NO Limits Alternative Provision Ltd | Education | 2026 |
| NO Lyrics Ltd | Wholesale & retail | 2023 |
| NO Organisation Limited | Information & communication | 1989 |
| NO Safe Margin Ltd | Information & communication | 2026 |
| NO. 33 Burlington Road Sherwood Property Management Limited | Households | 2001 |
| NO. 41 Style & Home Limited | Wholesale & retail | 2018 |
| NO.1 Barber Shop Notts Ltd | Other services | 2026 |
| NO.1 Consultants Ltd | Information & communication | 2014 |
| NO.1 Contractors Ltd | Construction | 2025 |
| NO18 Coffee & Eatery Ltd | Hospitality | 2024 |
| NO58 Bistro Ltd | Hospitality | 2025 |
| NOA Soft Limited | Wholesale & retail | 2025 |
| Noah's Retreat Laceby Limited | Hospitality | 2021 |
| Nobel Group UK Limited | Information & communication | 2007 |
| Nobel Xpression Ltd | Wholesale & retail | 2025 |
| Noble Air Express Ltd | Transport & logistics | 2025 |
| Noble Electrical Contractors Limited | Construction | 2010 |
| Noble Fire & Security Ltd | Construction | 2023 |
| Noble Kids Limited | Wholesale & retail | 2026 |
| Noble Live-In Care Ltd | Administrative & support | 2016 |
| Noble Place Ltd | Households | 2024 |
| Noble Stone Holiday Home Cleaning Limited | Administrative & support | 2023 |
| Noblesecure Services Ltd | Administrative & support | 2026 |
| Noclip.Studio Limited | Information & communication | 2026 |
| Noctara Security Ltd | Information & communication | 2026 |
| Nocturnal Lifting Club Ltd | Wholesale & retail | 2024 |
| Nocturnal Minds Consultancy Limited | Administrative & support | 2021 |
| Nodal Studio Ltd | Professional & scientific | 2026 |
| Node Building Consultancy Limited | Professional & scientific | 2017 |
| Nodrog Group Ltd | Real estate | 2018 |
| Noevus Technologies Ltd | Information & communication | 2026 |
| Nofc 1882 Ltd | Arts & recreation | 2023 |
| Nofools Ltd | Information & communication | 2005 |
| Nohadad Limited | Households | 2025 |
| Nohponex Limited | Information & communication | 1943 |
| Noir Press Ltd | Information & communication | 2017 |
| Noiseassess Ltd | Professional & scientific | 2010 |
| Noitavonni Ltd | Construction | 2010 |
| Noja Retail Group Ltd | Wholesale & retail | 2025 |
| Noladistilleryuk Ltd | Manufacturing | 2026 |
| Nolaventuresuk Limited | Hospitality | 2025 |
| Noma Travel Ltd | Hospitality | 2024 |
| Nomad Catering Ltd | Hospitality | 2022 |
| Nomad Diagnostics Ltd | Information & communication | 2026 |
| Nomad World Tapas Ltd | Hospitality | 2026 |
| Nomadic Capital Limited | Financial services | 2026 |
| Nomadic Spirit Ltd | Wholesale & retail | 2016 |
| Nomis Consulting Services Limited | Professional & scientific | 2020 |
| Nomis Lease Properties Limited | Real estate | 2024 |
| Nomis Properties Limited | Real estate | 2018 |
| Nompharma Limited | Wholesale & retail | 2019 |
| NON Stop Drops Limited | Transport & logistics | 2018 |
| Nona Bruce Services Ltd | Health & social care | 2023 |
| Nonagon Ltd | Hospitality | 2015 |
| NONEED2SHOUT Ltd | Arts & recreation | 2020 |
| Nonno's Pizzeria Ltd | Hospitality | 2016 |
| Nonpareil Construction Services Ltd | Professional & scientific | 2016 |
| Nonsuch Studios Trading Limited | Arts & recreation | 2022 |
| Nonsuch Theatre Limited | Education | 2013 |
| Noodle Group Ltd | Information & communication | 2018 |
| Nook Makers Collective Ltd | Wholesale & retail | 2026 |
| Nook&Cranny Cleaning Services Ltd | Administrative & support | 2026 |
| Noonan Engineering Ltd | Professional & scientific | 2022 |
| Nooney’S Home Interiors Ltd | Wholesale & retail | 2024 |
| Noor Care Ltd | Health & social care | 2022 |
| Noor Consultants Limited | Information & communication | 2025 |
| Noor Consulting Ltd | Information & communication | 2023 |
| Noor E Haram Traders Limited | Wholesale & retail | 2025 |
| NOOR1 Supermarket Ltd | Wholesale & retail | 2023 |
| Noori Hoori Fast Food Ltd | Hospitality | 2023 |
| Noornco Ltd | Transport & logistics | 2024 |
| Noorr Ltd | Professional & scientific | 2023 |
| Nooyou Healthcare & Nutrition Ltd | Wholesale & retail | 2022 |
| Norbrook Consulting Ltd | Information & communication | 2008 |
| Norchibas Ltd | Health & social care | 2021 |
| Nord Properties Ltd | Real estate | 2019 |
| Nordic Hot Tubs Limited | Extraterritorial | 2021 |
| Nordic Yard Limited | Other services | 2018 |
| Nordmach Global Limited | Wholesale & retail | 2025 |
| Norexa Ventures Ltd | Wholesale & retail | 2026 |
| Norfolk Park (Nottingham) Management Limited | Households | 1971 |
| Norivane Limited | Professional & scientific | 2014 |
| Norma Gregory Solutions Ltd | Information & communication | 2024 |
| Norman 1969 Ltd | Manufacturing | 2026 |
| Norman Galloway Homes CIC | Information & communication | 2019 |
| Norman Galloway Ltd | Real estate | 2016 |
| Norman Galloway VB Services Limited | Real estate | 2020 |
| Norman Smith Equipment (UK) Limited | Wholesale & retail | 2001 |
| Norman-Smirnovs Ltd | Wholesale & retail | 2021 |
| Normant Transport Limited | Transport & logistics | 2025 |
| Normark Fishing Ltd. | Wholesale & retail | 1969 |
| Normark UK Sport Ltd. | Manufacturing | 2012 |
| Norris Contracting Ltd | Construction | 1998 |
| Norris Plant Hire & Sales Limited | Wholesale & retail | 1995 |