| NKF Dent Limited | Health & social care | 2022 |
| NLK Properties Ltd | Real estate | 2023 |
| NLO Space Ltd | Wholesale & retail | 2026 |
| NM Lifts Ltd | Manufacturing | 2021 |
| NM Propco Ltd | Real estate | 2023 |
| NMK Consultancy Services Ltd | Professional & scientific | 2022 |
| NMS (Sussex) Ltd | Professional & scientific | 2024 |
| Nncr Limited | Real estate | 2016 |
| NO 16 Sackville Gardens Hove Limited | Other services | 1971 |
| NO 27 Brunswick Square Hove Limited | Households | 1985 |
| NO 35 RTM Company Limited | Real estate | 2014 |
| NO 45 Wilbury Road.Hove Limited | Extraterritorial | 1966 |
| NO 6 Fourth Avenue Hove Limited | Households | 1962 |
| NO 6 Royal Crescent Brighton, Limited | Households | 1966 |
| NO 60 Cromwell Road Hove Limited | Real estate | 1967 |
| NO 80 Grand Parade Management Limited | Households | 2002 |
| NO 91 Cromwell Road Hove Limited | Households | 1962 |
| NO Better Days Ltd | Information & communication | 2025 |
| NO Feeling IS Final Ltd | Health & social care | 2026 |
| NO Happiness Without Action Ltd | Transport & logistics | 2023 |
| NO Skip NO Problem Ltd | Water & waste | 2025 |
| NO Walls Limited | Real estate | 2008 |
| NO. 15 Seafield Road (Management) Limited | Households | 1974 |
| NO. 26 Clarendon Villas Hove Limited | Households | 1974 |
| NO. 3 Second Avenue (Management) Number Two Limited | Extraterritorial | 1990 |
| NO. 36 Adelaide Crescent Hove Limited | Households | 1965 |
| NO. 41 Sackville Road Hove Limited | Real estate | 1972 |
| NO. 43 Wilbury Road Hove, Limited | Households | 1966 |
| NO. 45 Dental Limited | Health & social care | 2020 |
| NO. 54 Portland Road (Management) Limited | Households | 1972 |
| NO. 57/59 Wilbury Road Hove, Limited | Households | 1963 |
| NO. 6 Rochester Gardens (Management) Limited | Households | 1974 |
| NO. 61/63 Wilbury Road Hove, Limited | Households | 1964 |
| NO. 62 Brunswick Place Hove Limited | Administrative & support | 2012 |
| NO. 9 Third Avenue Hove, Limited | Hospitality | 1966 |
| NO.23 Hova Villas,Hove,Limited | Extraterritorial | 1967 |
| NO.25 First Avenue Hove Limited | Households | 1962 |
| NO.41 Ventnor Villas Hove,Limited | Households | 1965 |
| NO.77 the Drive,Hove,Limited | Households | 1964 |
| NO1 Woodland Ltd | Hospitality | 2024 |
| Noaem Ltd | Health & social care | 2018 |
| Noah's Earth Ltd | Wholesale & retail | 2026 |
| Nobow Ltd | Professional & scientific | 2018 |
| Noda Publishing Ltd. | Arts & recreation | 2016 |
| Noise Management Limited | Wholesale & retail | 1996 |
| Nomadic Wine Digital Marketing Ltd | Professional & scientific | 2014 |
| Nono LAB Ltd | Manufacturing | 2022 |
| Nonstop Snow Limited | Administrative & support | 2005 |
| Noorray Ltd | Health & social care | 2025 |
| Norcon Film Productions Ltd | Information & communication | 2012 |
| Nordic Skin Clinic Limited | Health & social care | 2023 |
| Nordic Stork Ltd | Wholesale & retail | 2021 |
| Norman Ventures Ltd | Financial services | 2024 |
| Normandy House (Hove) Management Limited | Households | 1960 |
| Norrag Ltd | Manufacturing | 2025 |
| Norterra LLP | | 2012 |
| Norterra PS Limited | Professional & scientific | 2024 |
| North Road Timber Company Limited | Wholesale & retail | 2013 |
| North Street Food & Wine Limited | Wholesale & retail | 2011 |
| Northease Services Limited | Other services | 2013 |
| NORTHERN1 Limited | Hospitality | 2025 |
| Northexis Limited | Information & communication | 2025 |
| Northmark Advisory Limited | Professional & scientific | 2025 |
| Northstar GEO Limited | Information & communication | 2012 |
| Norton Court (Hove) Residents Limited | Households | 1990 |
| Norton Road Hove Limited | Households | 2011 |
| Norusd Limited | Wholesale & retail | 2025 |
| NOS. 47 & 49 Palmeira Avenue (Management) Limited | Real estate | 1974 |
| NOT Normal Network Ltd | Information & communication | 2025 |
| Nourish and Thrive Ltd | Health & social care | 2017 |
| Nourish Catering & Events Ltd | Hospitality | 2025 |
| Nousu Ltd | Professional & scientific | 2015 |
| Nova Capital Investments Limited | Real estate | 2024 |
| Nova Clinical Care Limited | Health & social care | 2025 |
| Nova Labs Apps Ltd | Information & communication | 2026 |
| Nova Translator Ltd | Information & communication | 2023 |
| Novo Insurance Services Ltd | Financial services | 2007 |
| Novus Dental Art Laboratory Ltd | Manufacturing | 2025 |
| NOW Networks Limited | Information & communication | 2024 |
| Nownext Ltd | Information & communication | 2012 |
| Np&H Properties Ltd | Real estate | 2015 |
| Npdu Limited | Health & social care | 2011 |
| Nppw Limited | Wholesale & retail | 2002 |
| NRB IT Service Architecture Limited | Information & communication | 2017 |
| NRG Eco Systems Ltd | Wholesale & retail | 2019 |
| Nrjstar Ltd | Professional & scientific | 2023 |
| NRS Surgical Limited | Health & social care | 2024 |
| NSF Barns Ltd | Real estate | 2024 |
| Nsroopra Ltd | Health & social care | 2022 |
| NTS Technology Partners Limited | Information & communication | 2002 |
| Nubeon LLP | | 2009 |
| Nude Life Limited | Arts & recreation | 2016 |
| Nuevera Limited | Information & communication | 2007 |
| Nuevoco Ltd | Hospitality | 2025 |
| Number 7 New Church Road Hove Limited | Households | 1979 |
| Number Eight Hove Limited | Households | 2015 |
| Number One Angel Ltd | Arts & recreation | 2025 |
| Numero Analytics Ltd | Information & communication | 2019 |
| Numineral Ltd | Manufacturing | 2022 |
| Nuplanet Sustainable Solutions Limited | Construction | 2003 |