| Millers Mews Management Company Limited | Households | 2018 |
| Mindsight Ltd | Health & social care | 2022 |
| Mint Maintenance (SW) Limited | Administrative & support | 2014 |
| MJL Heating Experts Ltd | Construction | 2023 |
| MJS Surveying Limited | Professional & scientific | 2010 |
| Mnos Properties Ltd | Real estate | 2024 |
| Money Prep Academy Ltd | Information & communication | 2023 |
| Montana Scaffolding Limited | Construction | 2005 |
| Moon on a Stick Productions Ltd | Professional & scientific | 2013 |
| Moore RM Properties Limited | Real estate | 2023 |
| Mordros Media Ltd | Information & communication | 2023 |
| MPA Hub Ltd | Information & communication | 2025 |
| MRG Technical Recruitment Ltd | Administrative & support | 2024 |
| MS Rocks (Glastonbury) Limited | Wholesale & retail | 2020 |
| Muffins Bakery Ltd | Manufacturing | 2019 |
| Muscleflex Nutrition Ltd | Health & social care | 2024 |
| Musical Songs Limited | Information & communication | 2004 |
| My Pleasure Ltd | Wholesale & retail | 2020 |
| Mypoint Group Ltd | Information & communication | 2026 |
| N G Property Services Limited | Construction | 2007 |
| Naturally Canine Ltd | Manufacturing | 2014 |
| Nature's Vines Limited | Wholesale & retail | 2018 |
| Navitas Sustainable Heating Systems Limited | Construction | 2007 |
| Neatpro Ltd | Administrative & support | 2024 |
| Neptune Greece JV (UK) Ltd | Real estate | 2025 |
| Neptune Greece MB (UK) Ltd | Real estate | 2025 |
| Nero Timber Ltd | Manufacturing | 2025 |
| Nerudo Limited | Manufacturing | 2025 |
| Newglaze Windows Limited | Wholesale & retail | 1983 |
| Nigel Baker Limited | Transport & logistics | 2001 |
| NO Frills OR Spills Ltd | Manufacturing | 2024 |
| Noble Machinery Limited | Manufacturing | 2018 |
| Norman Crofts Limited | Agriculture & fishing | 2003 |
| Novaridge Limited | Construction | 1986 |
| Nuage Solutions Ltd. | Information & communication | 2013 |
| NV Propco Ltd | Real estate | 2025 |
| O L Masters Ltd | Professional & scientific | 2019 |
| O'Heaphys Ltd | Hospitality | 2023 |
| O'Heaphys on the Green Ltd | Hospitality | 2025 |
| Oak Crescent Management Company Ltd | Households | 2022 |
| Oak Tree Car Valeting Ltd | Administrative & support | 2019 |
| Odrilea Ltd | Professional & scientific | 2018 |
| Office Management Services (Glastonbury) Limited | Professional & scientific | 2023 |
| Okhk Limited | Manufacturing | 2026 |
| Omeros London Limited | Professional & scientific | 2013 |
| OMS Business Hub Limited | Administrative & support | 2025 |
| One Love Promotions Ltd | Arts & recreation | 2022 |
| Optimal Design & Build Limited | Construction | 2004 |
| Orchard Court Ltd | Households | 2013 |
| Orchard Fields Ltd | Real estate | 2022 |
| Orchard Meadows Properties Limited | Real estate | 2006 |
| Orchard Vets Glastonbury Limited | Professional & scientific | 2019 |
| Organic Noms Limited | Hospitality | 2025 |
| Orme Ltd | Professional & scientific | 2004 |
| Ourtor Tech Ltd | Administrative & support | 2020 |
| OVA Trans Ltd | Transport & logistics | 2021 |
| Over the Wall Productions CIC | Arts & recreation | 2021 |
| OWL Enlightment CIC | Health & social care | 2022 |
| Oxford Mill Ltd | Wholesale & retail | 2011 |
| Paddington Farm Trust Limited | Agriculture & fishing | 1983 |
| Pamusha Healthcare Ltd | Professional & scientific | 2020 |
| Pamusha Homecare Limited | Health & social care | 2025 |
| Pamusha Limited | Extraterritorial | 2025 |
| Paramount Prizes Ltd | Other services | 2021 |
| Paramountbuilding Ltd | Wholesale & retail | 2019 |
| Park Wood Management Company Limited | Households | 2025 |
| Partners in Cream Limited | Wholesale & retail | 2001 |
| Passfield Business Publications Limited | Information & communication | 1999 |
| Patten Brothers Limited | Transport & logistics | 1984 |
| Paul Geal Limited | Wholesale & retail | 2007 |
| Paul Meeking Ltd | Construction | 2018 |
| Paxford Marsh Ltd | Real estate | 2022 |
| Peachmade Limited | Information & communication | 1987 |
| Pearson Recruitment Group Ltd | Transport & logistics | 2024 |
| Pearson Waste Management Ltd | Water & waste | 2024 |
| Pegasus Accounting Limited | Professional & scientific | 2003 |
| Pejep Limited | Real estate | 1986 |
| Pellenor Limited | Households | 2013 |
| Perch Partners Limited | Professional & scientific | 2025 |
| Perk-O-Rama Ltd | Information & communication | 2022 |
| Pilgrim Events Limited | Arts & recreation | 2017 |
| Pinpoint Golf Studios Ltd | Arts & recreation | 2026 |
| Pitched for YOU Ltd | Hospitality | 2019 |
| Platinum Caterers Limited | Extraterritorial | 2014 |
| Platinum Mortgages (Bristol) Limited | Financial services | 2021 |
| Playaways Neighbourhood Nursery Limited | Health & social care | 2003 |
| Plumbing Solutions Bristol Limited | Construction | 2024 |
| Point & Source Ltd | Arts & recreation | 2025 |
| Pop-Up Productions Ltd | Hospitality | 2020 |
| Portal Glastonbury Limited | Wholesale & retail | 2022 |
| Positive Space Consulting Ltd | Professional & scientific | 2013 |
| Prestige Building Developments Limited | Construction | 2026 |
| Preston Manor Management Company Limited | Households | 1968 |
| Pridehome Limited | Real estate | 1982 |
| Priory Estates Limited | Real estate | 2021 |
| Productive Monkey Limited | Professional & scientific | 2013 |
| Propitiation Limited | Information & communication | 2026 |
| Proqur Ltd | Manufacturing | 2015 |
| Protynxlabs Ltd | Professional & scientific | 2026 |
| Providence Langport Ltd | Professional & scientific | 2014 |