| Marybrook Mews Management Company Limited | Households | 2018 |
| Mayfair & Grace Limited | Wholesale & retail | 2013 |
| Meadowside Berkeley Ltd | Hospitality | 2024 |
| Meat & Livestock Classification Ltd | Extraterritorial | 2023 |
| Meat and Livestock Commercial Services Limited | Agriculture & fishing | 1998 |
| Memorandum Ltd | Information & communication | 1997 |
| Memorandum Office Limited | Administrative & support | 2011 |
| Michiels Catering Ltd | Transport & logistics | 2018 |
| Microstructured Limited | Professional & scientific | 2020 |
| Misco Mechanical Services Limited | Construction | 2023 |
| MJL Investment (Bristol) Ltd | Real estate | 2024 |
| MLC Tech Ltd | Agriculture & fishing | 2026 |
| Mortgage Habitat Commercial Limited | Financial services | 2021 |
| Mortgage Habitat Limited | Financial services | 2021 |
| Mundaymotors Ltd | Wholesale & retail | 2025 |
| Mynydd Fforch DWM Wind Energy Limited | Energy | 2020 |
| N.K. Lewis Limited | Construction | 2009 |
| Nair Group Limited | Hospitality | 2021 |
| Nant YR Allor Renewables Limited | Energy | 2018 |
| Natp Limited | Information & communication | 2017 |
| NB Consulting and Construction Ltd | Construction | 2025 |
| NED West Limited | Transport & logistics | 1973 |
| Ngano Limited | Information & communication | 2023 |
| Nisbet Consulting Services Limited | Health & social care | 2019 |
| Norton Family Ventures Limited | Financial services | 2024 |
| NSP Global Holdings Limited | Professional & scientific | 2025 |
| Ockendon Battery Storage Limited | Energy | 2018 |
| Ockendon GAS Limited | Energy | 2018 |
| Orme Design Ltd | Professional & scientific | 2023 |
| P3 Properties Ltd | Construction | 2023 |
| Paine of Glass Limited | Construction | 2021 |
| Party Peeps Business Ltd | Other services | 2021 |
| Paul Collins Creative Limited | Professional & scientific | 2016 |
| Pearchi Limited | Real estate | 2025 |
| Perfected Hair & Beauty Studio Limited | Other services | 2023 |
| Philip Case Consultant Limited | Professional & scientific | 2014 |
| Phoenix Global Aviation Services Limited | Manufacturing | 2008 |
| Pierce Bros (Farms) Limited | Agriculture & fishing | 2004 |
| PMA Supplies Ltd | Wholesale & retail | 2023 |
| Ppae Ltd | Financial services | 2013 |
| Premier Catering Installations Ltd | Manufacturing | 2011 |
| Prestige Heating Limited | Construction | 2017 |
| Primary Water Solutions Limited | Professional & scientific | 2011 |
| Pritchard Aero Services Limited | Other services | 2014 |
| Probita Solutions Limited | Agriculture & fishing | 2017 |
| Process Concept Service Limited | Other services | 2018 |
| Project Design Services (Bristol) Limited | Professional & scientific | 2009 |
| Protos Packaging Limited | Manufacturing | 1988 |
| PW25 Ltd | Construction | 2025 |
| R&M Top Group Limited | Construction | 2020 |
| R.H. Builders Limited | Construction | 2002 |
| RA RA Gabor Limited | Administrative & support | 2013 |
| RAB Health Coaching Ltd | Health & social care | 2023 |
| Radiant Scissors & Co Limited | Other services | 2022 |
| RD Wade Consulting Ltd | Professional & scientific | 2020 |
| RDA Bulk Packaging Ltd | Wholesale & retail | 1999 |
| RDA Online Ltd | Wholesale & retail | 2021 |
| RDS Productions Limited | Arts & recreation | 2017 |
| Red Pegasus Group Ltd | Professional & scientific | 2020 |
| Redvaar Aviation Limited | Manufacturing | 2013 |
| Redwick Business Solutions Limited | Information & communication | 2012 |
| REG Blandford Hill Limited | Construction | 2012 |
| REG Chapel Farm Limited | Construction | 2013 |
| REG Chapmans Howe Limited | Construction | 2012 |
| REG Cheverton Down Limited | Construction | 2010 |
| REG Damery Developers Limited | Financial services | 2019 |
| REG Dryholme Limited | Construction | 2012 |
| REG French Farm Storage Limited | Energy | 2014 |
| REG Gascoigne Wood Limited | Energy | 2013 |
| REG High POW II Holdings Limited | Professional & scientific | 2012 |
| REG Highfield Limited | Energy | 2009 |
| REG Holdings Limited | Professional & scientific | 1992 |
| REG Knockshinnoch Limited | Construction | 2012 |
| REG Langthwaite Limited | Energy | 2010 |
| REG Luson Farm Holdings Limited | Professional & scientific | 2012 |
| REG MFD Ltd. | Energy | 2018 |
| REG Netley Storage Limited | Energy | 2012 |
| REG Outh Muir Holdings Limited | Professional & scientific | 2012 |
| REG Outh Muir Limited | Construction | 2012 |
| REG Pines TIP Limited | Energy | 2013 |
| REG Power Developments Limited | Financial services | 2021 |
| REG Power Holdings Limited | Financial services | 2019 |
| REG Power Limited | Energy | 2011 |
| REG Power Management Limited | Professional & scientific | 2015 |
| REG Roskrow Barton II Limited | Professional & scientific | 2012 |
| REG Scarcewater Limited | Energy | 2013 |
| REG ST Ltd. | Construction | 2012 |
| REG TE Ltd. | Construction | 2014 |
| REG TE Wind Energy Ltd. | Energy | 2020 |
| REG Tranche 5 Holdings Limited | Professional & scientific | 2013 |
| REG Ventongimps Limited | Construction | 2012 |
| REG Windpower Limited | Energy | 1989 |
| Reinstated Ltd | Professional & scientific | 2026 |
| Richard Wilcox Financial Planning Limited | Professional & scientific | 2022 |
| Right Road Services Ltd | Transport & logistics | 2021 |
| Robert Winfield Holdings Limited | Financial services | 2017 |
| Robinsonhill Limited | Information & communication | 2014 |
| Rockhampton Property Services Limited | Real estate | 2001 |
| Rockman Wealth Ltd | Financial services | 2018 |
| Rooney & Mills Print Engineers Limited | Manufacturing | 2000 |