| Newdog PR Ltd | Professional & scientific | 2021 |
| Newent Court Management Company Limited | Households | 2016 |
| Newforless Limited | Extraterritorial | 2004 |
| Newfound Ltd | Professional & scientific | 2025 |
| Newfxage LP | | 2014 |
| Newgate Construction Limited | Construction | 1998 |
| Newham Learning Partnership (Hold Co) Limited | Construction | 2003 |
| Newham Learning Partnership (Project Co) Limited | Construction | 2006 |
| Newham Transformation Partnership Limited | Construction | 2008 |
| Newheat Plumbing & Heating Limited | Construction | 2016 |
| Newhouse Barton (Ipplepen) Management Company Limited | Households | 2004 |
| Newick Holdings Ltd | Administrative & support | 2021 |
| Newicks Ltd | Real estate | 2025 |
| Newicon Academy Ltd | Information & communication | 2019 |
| Newincco 209 Limited | Real estate | 2002 |
| Newincco 211 Limited | Real estate | 2002 |
| Newincco 233 Limited | Real estate | 2003 |
| Newland & Bracey Rental Ltd | Real estate | 2023 |
| Newland @ Kingswood Block a (Management) Company Limited | Real estate | 2006 |
| Newland @ Kingswood Block B (Management) Company Limited | Real estate | 2006 |
| Newland @ Kingswood Block D (Management) Company Limited | Real estate | 2006 |
| Newland @ Kingswood Block E (Management) Company Limited | Real estate | 2006 |
| Newland @ the Park (Management) Company Limited | Real estate | 2007 |
| Newland Estates (International) Limited | Professional & scientific | 2015 |
| Newland Mews Management Company Limited | Real estate | 2012 |
| Newland Orchard Management Company Limited | Households | 2019 |
| Newland Park Management Company Limited | Real estate | 2011 |
| Newland Place (Trowbridge) Management Company Limited | Households | 2019 |
| Newland Swallowcroft (Management) Co Ltd | Households | 2015 |
| Newland-Hardwick Consultancy Ltd | Professional & scientific | 2025 |
| Newlands (Bath) Limited | Construction | 2014 |
| Newlands (Junction 24) Developer Ltd | Real estate | 2025 |
| Newlands Hill Wind Energy Hub Limited | Energy | 2021 |
| Newlands SET Build Limited | Construction | 2018 |
| Newlife AC Ltd | Health & social care | 2017 |
| Newline Graphics Limited | Professional & scientific | 1990 |
| Newlook Surfacing Limited | Construction | 2023 |
| Newlook Windows (Bath) Limited | Construction | 1978 |
| Newman & Davies Ltd | Construction | 2021 |
| Newman and Sons (Investments) Limited | Professional & scientific | 1977 |
| Newmango Limited | Professional & scientific | 2018 |
| Newmark Bricklaying Ltd | Construction | 2014 |
| Newmark Construction Group Ltd | Financial services | 2021 |
| Newmark Design and Build Ltd | Construction | 2021 |
| Newmark Services Group Ltd | Administrative & support | 2022 |
| Newmile Properties Limited | Construction | 2012 |
| Newnham Court Ltd | Extraterritorial | 2013 |
| Newnham Court Maidstone Ltd | Extraterritorial | 2015 |
| Newnhamhr Ltd | Professional & scientific | 2006 |
| Newosta Business Services Limited | Information & communication | 2016 |
| Newpin Limited | Administrative & support | 2019 |
| Newport Tanning Ltd | Other services | 2013 |
| News & Mags Direct Limited | Wholesale & retail | 2003 |
| Newsnet IT Solutions Ltd | Information & communication | 2025 |
| Newspace Technical Recruitment Ltd | Administrative & support | 2023 |
| Newsplus (Bristol) Ltd | Wholesale & retail | 2009 |
| Newstar Properties Limited | Construction | 1994 |
| Newstone Global Consulting Ltd | Administrative & support | 2015 |
| Newstone Roofing Company Ltd | Construction | 2025 |
| Newstore Ltd | Information & communication | 2024 |
| Newt Property Ltd | Real estate | 2026 |
| Newtech Property Holdings Limited | Real estate | 2017 |
| Newton Motors Limited | Wholesale & retail | 1962 |
| Newton's Distributions UK Ltd | Wholesale & retail | 2025 |
| Newtone Acoustics Ltd | Professional & scientific | 2025 |
| Newtown Park Brewing Company Limited | Wholesale & retail | 2020 |
| Newtown Park Cycle Club CIC | Arts & recreation | 2023 |
| Newtown Property Holdings Ltd | Real estate | 2020 |
| Newwave Packaging Limited | Manufacturing | 2012 |
| Nexa Property Investments Ltd | Other services | 2025 |
| Nexabase Ltd | Wholesale & retail | 2025 |
| Nexae Limited | Extraterritorial | 2020 |
| Nexamerce Ltd | Wholesale & retail | 2025 |
| Nexarax Ltd | Information & communication | 2025 |
| Nexdrive Motors Ltd | Wholesale & retail | 2026 |
| Nexgen Audit Limited | Professional & scientific | 2025 |
| Nexgen Finance Marketing Limited | Information & communication | 2024 |
| Nexgen Sentinel Limited | Administrative & support | 2025 |
| Nexgen Technology Limited | Information & communication | 2015 |
| Nexgendata Ltd. | Information & communication | 2021 |
| Nexjen Limited | Administrative & support | 2003 |
| Nexoria Academy Ltd | Education | 2026 |
| Nexsen Biotech PTY UK Limited | Professional & scientific | 2024 |
| Nexsysone UK Limited | Information & communication | 2018 |
| Next Chapter Investments Ltd | Real estate | 2021 |
| Next Check Limited | | 1993 |
| Next Customer Please Ltd | Professional & scientific | 2020 |
| Next Environmental Services Limited | Real estate | 1989 |
| Next Home Solutions Development Ltd | Real estate | 2023 |
| Next Home Solutions Ltd | Real estate | 2016 |
| Next Level Autos Limited | Wholesale & retail | 2020 |
| Next Level Dorota Zwierzchowska Ltd | Wholesale & retail | 2019 |
| Next Level Facades Ltd | Construction | 2020 |
| Next Level Interiors Limited | Construction | 2017 |
| Next Level Logistics Bristol Ltd | Transport & logistics | 2023 |
| Next Step 118 Ltd | Real estate | 2024 |
| Next Step Digital Limited | Information & communication | 2018 |
| Next Step Exercise and Performance Limited | Health & social care | 2013 |
| Next Step Physiotherapy Limited | Health & social care | 2014 |
| Next Venture Studio Ltd | Professional & scientific | 2021 |