| Murray Myers Limited | Administrative & support | 2014 |
| Music AID Ltd | Information & communication | 2016 |
| Mustard Consulting Limited | Professional & scientific | 2021 |
| Muzard Limited | Information & communication | 2021 |
| MW Redditch Limited | Wholesale & retail | 2023 |
| MWM Contracting Services Ltd | Professional & scientific | 2018 |
| MX Engineering Ltd | Wholesale & retail | 2020 |
| My FAB Monday Ltd | Administrative & support | 2021 |
| My Local Traders Limited | Professional & scientific | 2024 |
| My Shooting Stars Nurseries Ltd | Health & social care | 2017 |
| Myers Road Safety Limited | Other services | 1990 |
| Myphonestore Limited | Other services | 2024 |
| MZ Sports Limited | Wholesale & retail | 2025 |
| N & L J Esposito Limited | Construction | 2007 |
| N & M Fibreglass (Holdings) Limited | Professional & scientific | 2003 |
| N & M Fibreglass Limited | Manufacturing | 2003 |
| N & S Property Development Ltd | Real estate | 2014 |
| N Barrett Holdings Ltd | Financial services | 2026 |
| N Britton Ltd | Real estate | 2019 |
| N Down Consultancy Services Limited | Administrative & support | 2026 |
| N E C Corporate Holdings Ltd | Administrative & support | 2020 |
| N H Equipment Hire Ltd | Administrative & support | 2008 |
| N J Calthorpe Limited | Health & social care | 2014 |
| N J Utilities Surfacing Limited | Construction | 2022 |
| N P K Garden Services Ltd | Administrative & support | 2024 |
| N S Rendering Services Limited | Construction | 2019 |
| N Thomson Construction Ltd | Construction | 2019 |
| Nadia Araujo Ltd | Arts & recreation | 2012 |
| Nagra Group Ltd | Financial services | 2025 |
| Nagra Psychology Ltd | Education | 2025 |
| Nagra Rentals Ltd | Real estate | 2024 |
| Nala Ventures Limited | Financial services | 2026 |
| Nali Hand Car Wash Ltd | Administrative & support | 2026 |
| Nancy’S Fancy’S Ltd | Hospitality | 2021 |
| Nano Organic Solutions Ltd | Manufacturing | 2023 |
| Nano Organics Limited | Manufacturing | 2023 |
| Naomi's Catering Limited | Hospitality | 2016 |
| Nara UK Ltd | Other services | 2025 |
| Narula Investments Ltd | Real estate | 2019 |
| Nationwide Racking Ltd | Construction | 2019 |
| Natural Nails Bromsgrove Limited | Other services | 2022 |
| Naturally Birmingham CIC | Professional & scientific | 2026 |
| Naturally Sparkles Limited | Construction | 2019 |
| NAV Solutions Ltd | Wholesale & retail | 2016 |
| Navier Consult Limited | Professional & scientific | 2016 |
| Navy MAY Limited | Administrative & support | 2015 |
| Nazdent Ltd | Health & social care | 2014 |
| NC Windows & Doors Ltd | Construction | 2023 |
| NCB Driver Training Ltd | Education | 2026 |
| NCB Medical Ltd | Education | 2026 |
| NCS Repairs Limited | Wholesale & retail | 2023 |
| ND Couple Ltd | Arts & recreation | 2022 |
| Need 4 Wheels Ltd | Wholesale & retail | 2017 |
| Needle Mill Developments Ltd | Construction | 2019 |
| Neil Barrett Car Sales Ltd | Wholesale & retail | 2026 |
| Neil Cooke Plumbing & Heating Limited | Construction | 2017 |
| Neill Evans Associates Ltd | Education | 2025 |
| Nelly's Yard Ltd | Hospitality | 2018 |
| Nemesis UK Performance Limited | Wholesale & retail | 2007 |
| Neon Hire Services Limited | Administrative & support | 2007 |
| Neptune Regulated Products Limited | Professional & scientific | 2016 |
| Netcode (UK) Limited | Information & communication | 1997 |
| Network Birmingham Limited | Extraterritorial | 2020 |
| Network Power Services Ltd | Energy | 2025 |
| NEU - Servo Repairs Ltd. | Wholesale & retail | 2001 |
| Neu-Servo Holdings Limited | Professional & scientific | 2008 |
| Neurofirefly UK Ltd | Professional & scientific | 2026 |
| Nevikall Animations Limited | Extraterritorial | 2015 |
| New END Road Limited | Arts & recreation | 2018 |
| New ERA Barbers Limited | Other services | 2026 |
| New Gate Studios Ltd | Information & communication | 2026 |
| New Habib Mart Ltd | Wholesale & retail | 2026 |
| New Leaf Recovery Services Ltd | Health & social care | 2015 |
| New Name Entertainment Limited | Information & communication | 2019 |
| New Road Dental Practice Limited | Health & social care | 2008 |
| New Salsa-Salsa Limited | Arts & recreation | 2008 |
| New Street Cafe Ltd | Hospitality | 2026 |
| New Ventures Trading Limited | Wholesale & retail | 2020 |
| Newdell Properties Limited | Real estate | 2022 |
| Newlook Barber Bromsgrove Ltd | Other services | 2024 |
| Newlook Barber Little Lane Ltd | Other services | 2024 |
| Newport Communications Ltd | Professional & scientific | 2020 |
| News on News (UK) Limited | Information & communication | 2025 |
| Newstarts | Water & waste | 2009 |
| Newton Bars Ltd | Hospitality | 2025 |
| Newton Cocktails Ltd | Hospitality | 2026 |
| Newton Mobile Events Ltd | Hospitality | 2026 |
| Nexalis Trading Limited | Hospitality | 2025 |
| Nexera Innovations Ltd | Wholesale & retail | 2026 |
| Next Generation Investments Limited | Real estate | 2008 |
| Next Level Holdings Ltd | Real estate | 2005 |
| Nexternal Limited | Extraterritorial | 2024 |
| Nexus Associates (ICT) Limited | Information & communication | 2004 |
| Nexusnex Limited | Wholesale & retail | 2025 |
| Nexusstone Limited | Wholesale & retail | 2025 |
| NGI Industrial Limited | Real estate | 2026 |
| Niaz Ahmed Mahar Ltd | Wholesale & retail | 2025 |
| Nicholas Brett & Co Limited | Administrative & support | 2012 |
| Nicholls Fabrications (UK) Limited | Manufacturing | 2005 |
| Nicholson Carpentry & Joinery Limited | Construction | 2003 |