| OSCAR888 Ltd | Transport & logistics | 2024 |
| OSF (WXM) Ltd | Transport & logistics | 2023 |
| Osos Estates Ltd | Financial services | 2018 |
| Osrocktransport Ltd | Education | 2025 |
| OT Cybersecurity Limited | Administrative & support | 2026 |
| OTS (UK) Limited | Manufacturing | 2013 |
| OUR Busy Brains CIC | Education | 2026 |
| OUR Space Marketing Limited | Wholesale & retail | 2025 |
| OUR Very Best Limited | Administrative & support | 2012 |
| OUT of School Alliance Limited | Other services | 2025 |
| Outbound Deliveries Ltd | Transport & logistics | 2019 |
| Outerspace Creative Ltd | Professional & scientific | 2020 |
| Outerspace Group Ltd | Construction | 2020 |
| Outfit-Plastering Ltd | Construction | 2021 |
| Outlooks Accommodation Limited | Hospitality | 2020 |
| Overhome Limited | Manufacturing | 2023 |
| Overleigh Equestrian Centre Ltd | Arts & recreation | 2020 |
| Overlord Limited | Real estate | 2013 |
| Owain Pritchard Ltd | Construction | 2014 |
| OWD Betts Foods Limited | Manufacturing | 2024 |
| Owen Automotive Limited | Wholesale & retail | 2008 |
| Owen Jones Ltd | Construction | 2017 |
| OWL Accountancy Services Limited | Professional & scientific | 2013 |
| OWL Properties (NW) Limited | Construction | 2017 |
| Owlera Ltd | Education | 2025 |
| Oxford White Properties Limited | Hospitality | 2026 |
| Oxserve Ltd | Transport & logistics | 2023 |
| O’Rekun Group Ltd | Administrative & support | 2025 |
| P & C Smith Limited | Wholesale & retail | 2003 |
| P & F Falkingham Ltd | Real estate | 2012 |
| P D H Electrical Ltd | Construction | 2019 |
| P Leisure Craft CYF | Administrative & support | 2024 |
| P M Norman Limited | Construction | 2003 |
| P N D Properties Limited | Real estate | 2017 |
| P Ridgway Agencies Limited | Wholesale & retail | 2017 |
| P Treanor Consulting Limited | Professional & scientific | 2019 |
| P V Groom Limited | Construction | 2003 |
| P W Rentals Ltd | Real estate | 2020 |
| P&J Kelly Medical Services Limited | Health & social care | 2017 |
| P&P Properties (WXM) Ltd | Real estate | 2024 |
| P. Sutton Installations Ltd | Construction | 2025 |
| P.A.C. Consultancy Limited | Professional & scientific | 2015 |
| P.D.D. Calipers Ltd | Wholesale & retail | 2015 |
| P.O. Events & Theatrical Limited | Administrative & support | 2025 |
| P.R. Bowyer Electrical Contractors Limited | Manufacturing | 1978 |
| P.R. Joinery and Construction Ltd | Construction | 2023 |
| P.S. Contracts Limited | Transport & logistics | 2003 |
| PA for Life Ltd | Administrative & support | 2026 |
| PA Holmes Consulting Limited | Professional & scientific | 2023 |
| Paallam Arts CIC | Arts & recreation | 2022 |
| PAC Engineering Solutions Limited | Professional & scientific | 2023 |
| Pacific Commercial Solutions Limited | Transport & logistics | 2015 |
| Pacifika Construction Services Limited | Construction | 2016 |
| Padel Point (Wrexham) Limited | Arts & recreation | 2025 |
| Pahlawan Limited | Health & social care | 2022 |
| PAJ Installations Ltd | Construction | 2025 |
| Palmer Creative Limited | Information & communication | 2015 |
| Palops United C.I.C. | Administrative & support | 2023 |
| PAN Stone Europe Limited | Wholesale & retail | 2012 |
| Panaga Services Ltd | Water & waste | 2024 |
| Panary Glassware Limited | Wholesale & retail | 2024 |
| Panorama Leisure Limited | Other services | 2025 |
| Pantasia Ltd | Hospitality | 2025 |
| Parees Hair Studio Limited | Other services | 2018 |
| Park END Consulting Group Ltd | Professional & scientific | 2020 |
| Park END Consulting Group Services Ltd | Professional & scientific | 2020 |
| Park Lodge Operations Ltd | Real estate | 2026 |
| Park Road (Rhosymedre) Management Limited | Administrative & support | 2014 |
| Park Road Commercials Ltd | Wholesale & retail | 2021 |
| Park Road Valeting(Wrexham) Ltd | Other services | 2019 |
| Parkfield House Residential Home Ltd | Health & social care | 2023 |
| Parkinsons (Machines and Vehicles) Limited | Administrative & support | 1975 |
| Parkleigh Farm Barns Management Company Limited | Real estate | 2011 |
| Parrot Environmental Limited | Water & waste | 2022 |
| Parrott Precision Engineering Limited | Manufacturing | 2012 |
| Parry Engineering Ltd | Manufacturing | 2014 |
| Pasam Retail Ltd | Wholesale & retail | 2026 |
| Passive Assets Group Limited | Financial services | 2024 |
| Passive Property Ltd | Real estate | 2018 |
| Pastspresentsncrystals Ltd | Wholesale & retail | 2025 |
| Pathway CH Limited | Professional & scientific | 2012 |
| Pathway to Carbon Zero Ltd | Professional & scientific | 2020 |
| Patrick and Johns Noble Homes Ltd | Construction | 2026 |
| Patrick City Engineering Ltd | Construction | 2018 |
| Pats Training Academy Ltd | Education | 2026 |
| Paul Cooper Electrical Services Ltd | Construction | 2018 |
| Paul Davies Engineering Ltd | Construction | 2016 |
| Paul Hewitt Design Limited | Professional & scientific | 2008 |
| Paul Mccoy Ltd | Health & social care | 2017 |
| Paul Sellers & Company Ltd | Information & communication | 2016 |
| Paul Williams Farming Limited | Agriculture & fishing | 2015 |
| Paul.B Ltd | Construction | 2007 |
| Pavement Radio Ltd | Professional & scientific | 2018 |
| PAW Print Games Ltd | Information & communication | 2011 |
| Pawel Buchowiecki Ltd | Manufacturing | 2025 |
| Pawsinorbit Ltd | Wholesale & retail | 2024 |
| PB Wrexham Limited | Hospitality | 2016 |
| PB365 Initiative Ltd | Health & social care | 2025 |
| Pccritch Limited | Professional & scientific | 2018 |
| PDP Landscape and Urban Design Limited | Administrative & support | 2012 |