| Mediapromotions Ltd | Information & communication | 2012 |
| Medru Consulting Limited | Professional & scientific | 2014 |
| MEL Owen Electrical Limited | Construction | 2008 |
| Melon Media Ltd | Professional & scientific | 2024 |
| Mercerrenew Ltd | Construction | 2025 |
| Merit Motor Body Repairs Limited | Wholesale & retail | 2024 |
| Mesen Solutions Ltd | Construction | 2017 |
| Michael John Quirk Limited | Extraterritorial | 2025 |
| Millionaire Creator Ltd | Education | 2025 |
| Mills & Co Accountants (NW) Ltd | Professional & scientific | 2017 |
| Mills & Co Holdings Ltd | Real estate | 2020 |
| Mills Management Limited | Real estate | 2022 |
| Miray FD Supplier Ltd | Extraterritorial | 2022 |
| Miroad Rubber Limited | Manufacturing | 2014 |
| MJS Building Systems (NW) Ltd | Construction | 2019 |
| Mountain YU Ltd | Hospitality | 2024 |
| Mrga Conwy Roofing Ltd | Construction | 2026 |
| MÔN Interiors Ltd | Professional & scientific | 2017 |
| Naughty Step Ltd | Information & communication | 2023 |
| Naughty Step Productions Limited | Information & communication | 2014 |
| Nelson Myatt Solicitors (Wales) Limited | Professional & scientific | 2022 |
| Nestmovers Limited | Wholesale & retail | 2025 |
| NLP Investments Ltd | Real estate | 2021 |
| North Shore Productions Ltd | Information & communication | 2016 |
| North Wales Car Club Limited | Arts & recreation | 1962 |
| North Wales Epcs Ltd | Extraterritorial | 2010 |
| North Wales Plastics Ltd | Construction | 2025 |
| North Wales Wheel Worx Ltd | Wholesale & retail | 2024 |
| Northern Offshore Services Ltd | Transport & logistics | 2019 |
| NW Sports Ventures Ltd | Arts & recreation | 2025 |
| Oakwood (Sychnant Pass) Management Company Limited | Households | 2018 |
| Old Brewery Management Company Limited(The) | Hospitality | 1984 |
| Omms Property Limited | Real estate | 2024 |
| Owen Plumbing & Heating Ltd | Construction | 2021 |
| Owens Newco B Limited | Financial services | 2024 |
| Palaeodatum Ltd | Professional & scientific | 2022 |
| Patrick Kiely Properties Ltd | Real estate | 2022 |
| Patrick Kiely Rentals Llandudno Junction Limited | Real estate | 2022 |
| Paul Hyde International Limited | Professional & scientific | 2023 |
| Pebble Hill Property Limited | Real estate | 2004 |
| Peerment Ltd | Health & social care | 2024 |
| PEN7ARC Ltd | Professional & scientific | 2026 |
| Pentre Van Sales Limited | Wholesale & retail | 2012 |
| Photo Agent Ltd | Professional & scientific | 2026 |
| Porrat Properties Limited | Real estate | 2016 |
| Portwood Travel Ltd | Administrative & support | 2021 |
| Proactive Protection Ltd | Administrative & support | 2026 |
| Property by Edwards Ltd | Real estate | 2022 |
| Puzzle Junction Studios Ltd | Information & communication | 2021 |
| Quality Awarding UK Ltd | Education | 2024 |
| Quirky Tea House Limited | Hospitality | 2023 |
| R & I Jones Investments Ltd | Financial services | 2022 |
| R Yasar Holdings Ltd | Real estate | 2024 |
| R Yasar Ltd | Other services | 2022 |
| Rapid Response Reporting Limited | Other services | 2009 |
| Rcltech Ltd | Information & communication | 2017 |
| Refrigeration Norwest (Llandudno) Limited | Wholesale & retail | 1977 |
| Regent Centre (Newtown) Limited | Real estate | 1983 |
| Renewably Protect UK Limited | Financial services | 2025 |
| Renewably UK Ltd | Other services | 2024 |
| Reno-Tech (North Wales) Limited | Wholesale & retail | 2010 |
| Renovate (Conwy) Ltd | Construction | 2018 |
| Resortlabs Ltd | Real estate | 2020 |
| Rhos-On-Sea Golf Club Limited | Arts & recreation | 1920 |
| Riejax Limited | Professional & scientific | 2025 |
| Riidz Ltd | Manufacturing | 2022 |
| Riverside Business Park (Conwy) Limited | Real estate | 2024 |
| RJW Experiences Limited | Education | 2016 |
| Robin Jones and Sons (Holdings) Limited | Professional & scientific | 1996 |
| Robin Jones and Sons Limited | Water & waste | 1985 |
| Robin Jones and Sons Properties Limited | Real estate | 1996 |
| Rookie Racing Limited | Education | 2022 |
| Roslyn Court Apartments Management Company Limited | Households | 2021 |
| Royal Flush Marketing Ltd | Professional & scientific | 2019 |
| RSW Properties (NW) Limited | Construction | 2025 |
| Saranya Enterprises Ltd | Transport & logistics | 2017 |
| SD2 Alim Ltd | Hospitality | 2022 |
| Sea Training International Limited | Professional & scientific | 2003 |
| Searson Property Management Ltd | Real estate | 2023 |
| Seas Design Limited | Information & communication | 2020 |
| Shields Property LLP | | 2020 |
| Shoreline (Rhyl) Limited | Transport & logistics | 2026 |
| Silver Star North Wales Limited | Extraterritorial | 2014 |
| Simple Camper Vans Limited | Manufacturing | 2015 |
| Smart Repair Car Clinic Ltd | Wholesale & retail | 2019 |
| Smart to BE Limited | Education | 2023 |
| Snowdonia Laundry Services Limited | Other services | 2010 |
| Snowdonia Marquees Limited | Administrative & support | 2005 |
| South Quay Shellfish Limited | Agriculture & fishing | 2017 |
| Spirit of the Dachshund Limited | Wholesale & retail | 2024 |
| ST Schoolwear Ltd | Wholesale & retail | 2024 |
| Store 1881 Limited | Wholesale & retail | 2026 |
| Storm 4 Events Ltd | Professional & scientific | 2017 |
| Summit 7 Solutions Ltd | Real estate | 2023 |
| Suresail Ltd | Wholesale & retail | 2024 |
| Susan Hamrouge Ltd | Professional & scientific | 2009 |
| Sussex Home & Energy Inspectors Limited | Professional & scientific | 2010 |
| Sustainable Warmth Limited | Construction | 2023 |
| Swinnerton Business Services Limited | Professional & scientific | 2024 |
| SWN Events Ltd | Arts & recreation | 2025 |