| Monacelle Limited | Real estate | 2021 |
| Monway Woodfuel Limited | Wholesale & retail | 2014 |
| Moore Than Surveyors Limited | Real estate | 2021 |
| Morgan & Bond Group Limited | Financial services | 2021 |
| Morgan & Bond Limited | Construction | 2010 |
| Morgan Global Logistics Limited | Transport & logistics | 2014 |
| Morriso'Connell Ltd | Administrative & support | 2024 |
| Mother Maiden Ltd | Hospitality | 2026 |
| Motivair Compressors Limited | Manufacturing | 1967 |
| Move Mojo Group CIC | Arts & recreation | 2023 |
| Move Mojo Ltd | Wholesale & retail | 2022 |
| MP Surgical Services Ltd | Health & social care | 2019 |
| Mulberry Drive Management Company Limited | Households | 2022 |
| Multi Stock Ltd | Wholesale & retail | 2022 |
| Murus Facades Limited | Manufacturing | 2012 |
| MX & Trials Spares Limited | Wholesale & retail | 2021 |
| My Ace Toys Ltd | Wholesale & retail | 2021 |
| My Best Mechanic Ltd | Wholesale & retail | 2025 |
| N&B Building Services Limited | Construction | 2010 |
| N&B GAS and Plumbing Ltd | Construction | 2019 |
| Nailnerds Limited | Wholesale & retail | 2022 |
| Napolis Pizza Kebab Limited | Hospitality | 2026 |
| Napolis Pizza Limited | Hospitality | 2025 |
| Natech Limited | Manufacturing | 2002 |
| National Van Leasing Limited | Wholesale & retail | 2019 |
| Nationwide Watercare Limited | Water & waste | 2013 |
| Natt Express Ltd | Transport & logistics | 2025 |
| Natural Fitness Ltd | Arts & recreation | 2024 |
| Nettervibration UK Ltd | Manufacturing | 2020 |
| Nextstep Highways Ltd | Manufacturing | 2024 |
| NIC Romano Therapy Ltd | Health & social care | 2025 |
| Nice Kitchens UK Ltd | Wholesale & retail | 2009 |
| Nick & Stuart Property Limited | Households | 2012 |
| NJ Telecommunications Ltd | Information & communication | 2013 |
| Njoy Education : Teaching, Tutoring & Training Services Ltd | Education | 2022 |
| NN Bargains Ltd | Wholesale & retail | 2023 |
| NO Bounds Adventure Ltd | Education | 2024 |
| Nobl-Tech Ltd | Information & communication | 2025 |
| Norton Canes Fireplace Factory Ltd | Wholesale & retail | 2017 |
| Novavox Ltd | Information & communication | 2025 |
| NP Roofing Solutions Limited | Construction | 2022 |
| NPM Drive and Patio Revamp Limited | Construction | 2022 |
| NPM Window Cleaning Limited | Administrative & support | 2017 |
| NU NU Limited | Education | 2001 |
| Nude Bar and Grill Limited | Hospitality | 2018 |
| Nude Chicken Limited | Hospitality | 2018 |
| Nufast Limited | Wholesale & retail | 2005 |
| O'Malley Properties Limited | Real estate | 2023 |
| O.R Carpentry Ltd | Manufacturing | 2023 |
| Oak Tree Nursery Investments Limited | Education | 2012 |
| Oak Vale Management Company Limited | Households | 2009 |
| Oakridge Gardens Management Company Limited | Households | 2019 |
| Oaksheer Limited | Construction | 2023 |
| Oakwood Carpentry & Maintenance Limited | Construction | 2011 |
| ODE Properties Ltd | Real estate | 2025 |
| Offiss Ltd | Real estate | 2021 |
| OG Sourcing Ltd | Wholesale & retail | 2020 |
| Oliver Grace Ltd | Water & waste | 2015 |
| ON Call FM Services Limited | Construction | 2019 |
| One Mobility Solution Ltd | Other services | 2024 |
| Orical Ltd | Manufacturing | 2014 |
| Overman Stays Limited | Real estate | 2026 |
| Owen's Sports Injury Clinic Ltd | Health & social care | 2019 |
| O’Neills Property Investment Ltd | Real estate | 2025 |
| P & S Contract Services Limited | Professional & scientific | 1998 |
| P & S Installations Limited | Construction | 2002 |
| P & V Groundworks Limited | Construction | 2009 |
| P.F.S.International Ltd | Transport & logistics | 2009 |
| P.R. Holdings Limited | Professional & scientific | 2009 |
| P.R. Metals Limited | Wholesale & retail | 2003 |
| P.S.B IT Solutions Limited | Professional & scientific | 2007 |
| Paddock Group Ltd | Professional & scientific | 2020 |
| PAH Supplies Ltd | Wholesale & retail | 2012 |
| Paintkey Limited | Education | 2007 |
| Palm Management Services Limited | Real estate | 2024 |
| Panoramic Fires Limited | Wholesale & retail | 2023 |
| Parangi Holdings Ltd | Real estate | 2024 |
| Parkhill Fish Bar Ltd | Hospitality | 2020 |
| Parry's Electrical Ltd | Manufacturing | 2025 |
| PAT Accountancy & Tax Advisory Ltd | Professional & scientific | 2025 |
| Pat's Testing Limited | Construction | 2025 |
| Paul Mason Holdings Limited | Financial services | 2019 |
| Paul Whitehouse Painter & Decorator Limited | Construction | 2014 |
| Pawsome Paws Training Academy Ltd | Education | 2022 |
| PC Drive Limited | Information & communication | 2010 |
| Pemberley Properties (Staffordshire) Limited | Real estate | 2021 |
| Penelope and Company (Shenstone) Ltd | Other services | 2021 |
| Perfect Tipple Limited | Wholesale & retail | 2007 |
| Perks Patel Holdings Limited | Extraterritorial | 2004 |
| Perry & Sons Group Limited | Construction | 2025 |
| Perrys Drive Hire Limited | Transport & logistics | 2014 |
| Personal Trainers Walsall Limited | Arts & recreation | 2019 |
| Petal & Pearl Limited | Professional & scientific | 2025 |
| Phebe Anns Performing Arts Ltd | Other services | 2017 |
| PHW Cleaning Services Limited | Administrative & support | 2026 |
| Pickard & Pette Investment Ltd | Real estate | 2025 |
| Pier 52 CIC | Other services | 2017 |
| Pilotis Agency Limited | Construction | 2021 |
| Pincombe Group Ltd | Information & communication | 2022 |
| Pink Accountants Limited | Professional & scientific | 2013 |