| Marcellus Community Hub CIC | Health & social care | 2024 |
| MCW Carbon Offset Ltd | Extraterritorial | 2011 |
| MDA Wheels Ltd | Manufacturing | 2013 |
| MEG Hicks Ltd | Arts & recreation | 2026 |
| Merry Bros Ltd | Extraterritorial | 2012 |
| Michael Murphy Associates Limited | Health & social care | 2013 |
| Middle Hook Farm Limited | Agriculture & fishing | 2005 |
| Mike Brotherwood Limited | Manufacturing | 2008 |
| Millenium Digital & Properties Ltd | Real estate | 2023 |
| Millennium Internet Limited | Information & communication | 1994 |
| Millforge Limited | Manufacturing | 1993 |
| Mindful Waves Hypnotherapy Ltd | Health & social care | 2020 |
| Minwear Farm Limited | Agriculture & fishing | 2004 |
| Miss Digi Ltd | Professional & scientific | 2026 |
| Mkgetaway Ltd | Hospitality | 2017 |
| Mobile Sheep Services Limited | Agriculture & fishing | 2016 |
| Mojo Marketing Limited | Information & communication | 2014 |
| Mountain Chapel Woods Ltd | Extraterritorial | 2011 |
| MR Logistic Ltd | Transport & logistics | 2019 |
| My Epicurious Life Limited | Administrative & support | 2021 |
| Narberth Autos 4X4 Ltd | Wholesale & retail | 2026 |
| Narberth Autos and Pembrokeshire Hydrodipping Limited | Wholesale & retail | 2022 |
| Narberth Barbers Limited | Other services | 2025 |
| Narberth Building Services Ltd | Construction | 2024 |
| Narberth Classic Motorcycle Club | Arts & recreation | 2005 |
| Narberth Construction Limited | Construction | 2026 |
| Narberth Fish and Chips Limited | Hospitality | 2026 |
| Narberth Framery Ltd | Wholesale & retail | 2026 |
| Narberth Kebab Shop Ltd | Hospitality | 2026 |
| Narberth Mot's Limited | Wholesale & retail | 2020 |
| Narberth Museum Limited | Arts & recreation | 1987 |
| Narberth Travel Ltd | Transport & logistics | 2022 |
| Narberth Tyre Services Limited | Wholesale & retail | 2015 |
| Nestra Homes Limited | Real estate | 2025 |
| Nevern Pembrokeshire Ltd | Real estate | 2024 |
| New Broom Cleaning Services Wales Ltd | Administrative & support | 2024 |
| Nexus Medical (UK) Limited | Wholesale & retail | 2015 |
| Noah's ARK Nursery (Pembrokeshire) Limited | Education | 2009 |
| Northfield Consulting Engineers Ltd | Construction | 2009 |
| NPH & Renewables Ltd | Construction | 2011 |
| Oakfields Pembrokeshire Ltd | Hospitality | 2022 |
| Ocean Leisure Parks Ltd | Hospitality | 2019 |
| OFF Site Statics Ltd | Wholesale & retail | 2019 |
| OH Crumbs Narberth Ltd | Hospitality | 2023 |
| Oishī Swshi Ltd | Wholesale & retail | 2024 |
| Optimum Promotions Limited | Arts & recreation | 2001 |
| Oriel Q Gallery CIC | Wholesale & retail | 2026 |
| Other Spaces Limited | Health & social care | 1997 |
| P&L Repairs and Renovations Limited | Other services | 2026 |
| Palmer & Skippins Limited | Wholesale & retail | 2002 |
| Parc Carreg Limited | Agriculture & fishing | 2012 |
| Parc-Y-Teg Limited | Manufacturing | 2022 |
| Park House Farm Camping and Glamping Limited | Hospitality | 2021 |
| PBE Energy Limited | Construction | 2019 |
| PBE Fuels Ltd | Wholesale & retail | 2007 |
| Pbesco Limited | Construction | 2007 |
| Pembrokeshire Association of Community Transport Organisations | Other services | 2011 |
| Pembrokeshire Entertainment Limited | Administrative & support | 2010 |
| Pembrokeshire Holiday Destination, Leisure and Wellness LLP | | 2024 |
| Pembrokeshire Motor Club Limited | Arts & recreation | 1980 |
| Pembrokeshire Painters Ltd | Construction | 2018 |
| Pembrokeshire Wealth Management Limited | Professional & scientific | 2016 |
| Pentagon Associates Limited | Professional & scientific | 1990 |
| Pigsty Properties Ground Management Limited | Extraterritorial | 2007 |
| Pipemech Engineering Limited | Professional & scientific | 2012 |
| Pirate Cafe Amroth Limited | Hospitality | 2025 |
| Pirates on the Beach Limited | Hospitality | 2003 |
| Plas Hyfryd Country Hotel Limited | Hospitality | 2004 |
| Plas Hyfryd Holdings Limited | Financial services | 2020 |
| Pleasant Valley Caravan Park Limited | Hospitality | 2012 |
| Pleasant Valley Properties Limited | Real estate | 2020 |
| Plumvanilla Ltd | Hospitality | 2023 |
| Pods and Lodges Limited | Other services | 2023 |
| Pointy Faces Ltd | Wholesale & retail | 2021 |
| Potter-Young Ltd | Wholesale & retail | 2023 |
| Powder Room Cosmetics Ltd | Extraterritorial | 2013 |
| Premier Stoves and Fireplaces Ltd | Wholesale & retail | 2010 |
| Preseli Service Station Ltd | Wholesale & retail | 2009 |
| Preseli Transport Training Solutions Ltd | Administrative & support | 2012 |
| Preventative Equine Care Ltd | Professional & scientific | 2020 |
| Project Fitness Tenby Ltd | Extraterritorial | 2016 |
| PUB Sport Services Ltd | Manufacturing | 2025 |
| Quarrywood Glamping Ltd | Hospitality | 2023 |
| Quayside Care Limited | Health & social care | 2020 |
| R & M Transport Solutions Limited | Transport & logistics | 2013 |
| R.A.O.B. Social Club (Narberth) Limited | Hospitality | 1979 |
| Rachel Hicks Media Limited | Information & communication | 2013 |
| Radix Gallery Limited | Wholesale & retail | 2017 |
| RAM (West Wales) Ltd | Financial services | 2024 |
| Revelation Clothing Limited | Manufacturing | 2010 |
| Rhydfelin Residents Association Limited | Households | 2017 |
| Rhythm of Life Therapies CIC | Health & social care | 2023 |
| Richards Tyres Ltd | Wholesale & retail | 2022 |
| RMI (Wales) Limited | Real estate | 2008 |
| RMI Management Limited | Real estate | 2018 |
| Rooms at the Star in Narberth Limited | Hospitality | 2020 |
| Rose Cottage Drainage Management Company Limited | Water & waste | 2014 |
| Royston Energy Ltd | Professional & scientific | 2023 |
| Rtc&I Ltd | Information & communication | 2019 |
| Rumpler Engineering Limited | Manufacturing | 2024 |