| MMD Data Services Limited | Information & communication | 2024 |
| MMO Trade Limited | Wholesale & retail | 2019 |
| MNS Burrows Ltd | Wholesale & retail | 2020 |
| Modi Catering Equipment Limited | Extraterritorial | 2019 |
| Modish Trade Ltd | Wholesale & retail | 2024 |
| Mokak Co Ltd | Administrative & support | 2023 |
| Momentum Academy Ltd | Professional & scientific | 2025 |
| Montford Associates Limited | Professional & scientific | 2014 |
| Montop Industry Ltd | Administrative & support | 2019 |
| Moonband Limited | Information & communication | 2005 |
| Moonosa Fashion Apparel Co. Limited | Manufacturing | 2026 |
| MOR Spa 789 Ltd | Health & social care | 2022 |
| Morar Holdings Ltd | Professional & scientific | 2023 |
| Morley Leisure Limited | Real estate | 1994 |
| Morning Sunshine Coffee Ltd | Hospitality | 2018 |
| Morphity Limited | Information & communication | 2006 |
| Morton Itegeko Limited | Professional & scientific | 2015 |
| Mosaique Press Ltd | Information & communication | 2008 |
| Moss Roofing Ltd | Construction | 2017 |
| Moss Roofline Ltd | Construction | 2020 |
| Motori Dinamica Limited | Professional & scientific | 2024 |
| Mountain Mindset Ltd | Professional & scientific | 2018 |
| MPH Racing Trade Ltd | Wholesale & retail | 2024 |
| MR & MRS Warwick Ltd | Hospitality | 2015 |
| MRW Kenilworth Limited | Real estate | 2006 |
| MRW Property Ltd | Real estate | 2014 |
| MSL Hampton Lucy Ltd | Construction | 2020 |
| MSL Mickleton Ltd | Construction | 2020 |
| Mstscapes Limited | Financial services | 2025 |
| Multilingua Translations Ltd | Professional & scientific | 2021 |
| MWM Hospitalquip Co., Ltd | Extraterritorial | 2015 |
| Mxhventures Limited | Administrative & support | 2012 |
| My PT Course Ltd | Arts & recreation | 2021 |
| Mysportscience Ltd | Professional & scientific | 2015 |
| N-Aeon Logistics Limited | Administrative & support | 2023 |
| Nafan Trading Limited | Administrative & support | 2023 |
| Nails 4 U Kenilworth Ltd | Other services | 2025 |
| Naje Consulting Ltd | Professional & scientific | 2025 |
| Nakafun Co., Ltd | Wholesale & retail | 2026 |
| NAM Aviation Limited | Transport & logistics | 2022 |
| Nanbo Mechanical Equipment Co., Ltd | Extraterritorial | 2018 |
| Nanfang Auto Parts Manufacture Co., Ltd | Administrative & support | 2017 |
| Nantong Zhongtian Machinery Manufacturing Co., Ltd. | Administrative & support | 2023 |
| Nardo Capital Ltd | Professional & scientific | 2025 |
| Nardo Lettings Ltd | Real estate | 2026 |
| Nascot Limited | Construction | 2003 |
| Nashco Scientific Co., Ltd | Administrative & support | 2019 |
| National Federation of Young Farmers' Clubs | Other services | 2024 |
| National Horse Museum Limited | Education | 2000 |
| National Maternity Voices CIC | Health & social care | 2019 |
| National PIG Association | Agriculture & fishing | 1999 |
| National Pony Society(The) | Other services | 1903 |
| Native Breeds Limited | Agriculture & fishing | 2010 |
| Navigaite Limited | Information & communication | 2017 |
| Ncmanagement Ltd | Administrative & support | 2019 |
| ND Chemicals Co., Ltd | Extraterritorial | 2018 |
| Nectar Ltd | Wholesale & retail | 2014 |
| Needz Must Ltd | Other services | 2023 |
| Neil Vallance & Associates Limited | Professional & scientific | 2007 |
| NEO Ascent Trading Company Limited | Wholesale & retail | 2019 |
| Neomi Industrial Limited | Wholesale & retail | 2015 |
| Neura Ridge Solutions Ltd | Information & communication | 2026 |
| Neusland Industrial Co., Ltd | Administrative & support | 2024 |
| New ERA Fashions Ltd | Manufacturing | 2019 |
| New Honesty Trade Limited | Wholesale & retail | 2021 |
| New PAN Limited | Hospitality | 2024 |
| New Technology 2009 Limited | Information & communication | 2009 |
| New Technology Cadcam Limited | Information & communication | 1996 |
| New West Trading Co., Ltd | Administrative & support | 2026 |
| Newbody Fitness Limited | Arts & recreation | 2000 |
| Newbridge Park Management Company Limited | Real estate | 2019 |
| Newlands (Cambridge Plot 1) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 2) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 3) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 4) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 5) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 6) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 7) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 8) Ltd | Real estate | 2022 |
| Newlands (Cambridge Plot 9) Ltd | Real estate | 2022 |
| Newlands (Cambridge) Ltd | Real estate | 2020 |
| Newlands (Cambridge) Management Company Ltd | Real estate | 2022 |
| Newlands (Cross Point Infrastructure) Ltd | Financial services | 2026 |
| Newlands (Cross Point) Ltd | Real estate | 2020 |
| Newlands (Development Management) Ltd | Real estate | 1995 |
| Newlands (ELY) Limited | Construction | 2025 |
| Newlands (Goldthorpe Utilities) Limited | Construction | 2025 |
| Newlands (Goldthorpe) Ltd | Financial services | 2022 |
| Newlands (Junction 16 Plot 1) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 2) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 3) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 4) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 5) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 6) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 7) Ltd | Real estate | 2022 |
| Newlands (Junction 16 Plot 8) Ltd | Real estate | 2022 |
| Newlands (Junction 16) Ltd | Real estate | 2020 |
| Newlands (Junction 16) Management Company Ltd | Real estate | 2022 |
| Newlands (Junction 24) Ltd | Real estate | 2019 |
| Newlands (Kettering) Limited | Real estate | 2024 |