| MID Wales Bouncy Castle and Soft Play Hire Ltd | Arts & recreation | 2021 |
| MID Wales Centre ACU Ltd | Arts & recreation | 2008 |
| MID Wales Fibre Limited | Information & communication | 2022 |
| MID Wales Horse Box Hire Ltd | Administrative & support | 2025 |
| MID Wales Maintenance Ltd | Construction | 2024 |
| MID Wales Support Solutions Limited | Professional & scientific | 2019 |
| MID Wales Ventures Ltd | Arts & recreation | 2025 |
| Midwales Caravan Park Ltd | Hospitality | 2017 |
| Millwood Leisure Ltd | Hospitality | 2021 |
| Mindsdevelopment Ltd | Education | 2024 |
| Minton and Donello Limited | Manufacturing | 2010 |
| Mitchell Meredith Holdings Limited | Financial services | 2023 |
| Mitchell Meredith Limited | Administrative & support | 2001 |
| Mogwai Media Limited | Information & communication | 2018 |
| Montgomery Waters Limited | Manufacturing | 1996 |
| Moore Golf Catering Ltd | Hospitality | 2022 |
| Mooreville Ltd | Professional & scientific | 2021 |
| Movement Recreation Culture Ltd | Hospitality | 2021 |
| MT Development Motorsport Ltd | Wholesale & retail | 2020 |
| MT Properties Limited | Real estate | 2002 |
| Murphy Brown Limited | Wholesale & retail | 2012 |
| Natural Modern Homes Limited | Professional & scientific | 2023 |
| Natural Modern Studio Limited | Professional & scientific | 2023 |
| NE James Pressure Washing Services Limited | Agriculture & fishing | 2014 |
| Neuroenable Limited | Health & social care | 2021 |
| Newman Southall Management Company Limited | Households | 2023 |
| Newton Physiques Limited | Arts & recreation | 2012 |
| Newtown P.O. Limited | Transport & logistics | 2024 |
| Next GEN Car Sales Ltd | Wholesale & retail | 2022 |
| NFR Events Ltd | Water & waste | 2018 |
| Nigel Bufton Machinery Limited | Wholesale & retail | 2009 |
| NO6 EGG Company Limited | Wholesale & retail | 2018 |
| Number 30 Ltd | Hospitality | 2018 |
| Nutrition by Design Limited | Education | 2012 |
| Oakengates Tattoo Limited | Arts & recreation | 2018 |
| Oakenport House Limited | Real estate | 1982 |
| OCM Communications Limited | Information & communication | 2006 |
| OFF Road Only Limited | Wholesale & retail | 1996 |
| Offroad Storage Limited | Other services | 2002 |
| Oliver-Lewis Limited | Hospitality | 2020 |
| Orielton Management Limited | Real estate | 2017 |
| Oyster Beach Ltd | Administrative & support | 2013 |
| P.A.R Homes (Property) Limited | Real estate | 2021 |
| P.A.R. Homes Limited | Construction | 1997 |
| Pantpurlais Lettings Limited | Hospitality | 2021 |
| Parkwells Leisure Limited | Hospitality | 2012 |
| PC & PD Harley Limited | Transport & logistics | 2024 |
| PCA Thai Trading Limited | Hospitality | 2015 |
| PD 123 Limited | Manufacturing | 2024 |
| PDH Associates Limited | Professional & scientific | 2003 |
| Pelagon Biosciences Limited | Extraterritorial | 2002 |
| Penrhiwgarn Ltd | Professional & scientific | 2016 |
| Penrhyn Management Limited | Households | 1984 |
| Penybont Service Station Limited | Wholesale & retail | 2008 |
| Penybont Sports Committee Limited | Arts & recreation | 2006 |
| Penyfan Limited | Hospitality | 2020 |
| Peter Clarke Building Services Limited | Construction | 2008 |
| Peter Wilcox-Jones Ltd | Professional & scientific | 2013 |
| Pizza Lover Lover Ltd | Hospitality | 2024 |
| Pizzalove Ltd | Hospitality | 2024 |
| Portland House Developments Ltd | Hospitality | 2004 |
| Power Play Distribution Ltd | Wholesale & retail | 2024 |
| Powys Association of Voluntary Organisations Cymdeithas Mudiadau Gwirfoddol Powys | Other services | 1998 |
| Powys Commercial Services Ltd | Administrative & support | 2019 |
| Powys Drugs and Alcohol Centres | Health & social care | 2003 |
| Powys Engineering Ltd | Construction | 2000 |
| Powys Enterprises Ltd | Administrative & support | 2011 |
| Powys Environmental Limited | Water & waste | 1990 |
| Powys Fire Solutions Ltd | Construction | 2026 |
| Powys Fire Sprinklers Ltd | Construction | 2020 |
| Powys GAS Plumbing Heating Electrical Ltd | Construction | 2016 |
| Powys Men's Circle CIC | Health & social care | 2024 |
| Precious Metal Logistics Ltd | Transport & logistics | 2013 |
| Preserved Timber Products Limited | Manufacturing | 2012 |
| Presteigne Properties Limited | Construction | 2010 |
| Price Meredith Medics Ltd | Health & social care | 2015 |
| Pro Cabs (Wells) Limited | Transport & logistics | 2014 |
| Pronav Ltd | Information & communication | 2025 |
| Prosperity Taverns Ltd | Professional & scientific | 2004 |
| Prosser Roofing Ltd | Construction | 2021 |
| Proteus Management Ltd | Construction | 2019 |
| Pumpkin Patch Play Limited | Hospitality | 2026 |
| Quercus Estates Co Limited | Real estate | 1998 |
| Quiescent Ltd | Professional & scientific | 2017 |
| R & B Transport Ltd | Transport & logistics | 2012 |
| R & DR Limited | Professional & scientific | 2020 |
| R Close Services Ltd | Wholesale & retail | 2011 |
| R D Rees Limited | Manufacturing | 2012 |
| R F Price Limited | Construction | 2013 |
| R J D Automation Limited | Manufacturing | 2025 |
| Radford Autograss Club Limited | Arts & recreation | 1987 |
| Radnor Auctions Limited | Real estate | 2009 |
| Radnorshire Travel Limited | Transport & logistics | 2017 |
| RB Cuisine Limited | Hospitality | 2024 |
| RCH Accountants Limited | Professional & scientific | 2023 |
| Reads Motor Repairs Limited | Extraterritorial | 2002 |
| Ready Fresh Eats Ltd | Hospitality | 2025 |
| Reaper Fitness Ltd | Arts & recreation | 2018 |
| Rebecca Cossburn Limited | Professional & scientific | 2004 |
| Red House Heritage Limited | Professional & scientific | 2026 |