| Nationwide Home Innovations Property Holdings Limited | Financial services | 2025 |
| Nationwide Home Innovations Topco Limited | Financial services | 2025 |
| Nationwide Home Property Limited | Real estate | 2017 |
| Nautico Marine Ltd | Manufacturing | 2019 |
| ND Creative Property Ltd | Real estate | 2026 |
| Nemean Security Limited | Administrative & support | 2006 |
| New ERA Design Limited | Other services | 2014 |
| New ERA Rentals Ltd | Real estate | 2018 |
| New Generation Group Ltd | Administrative & support | 2024 |
| New Horizons Brewing Limited | Manufacturing | 2020 |
| New Image Hair Salon (Wareham) Ltd | Other services | 2019 |
| New Leaf OT Ltd | Health & social care | 2023 |
| Neway Meats Limited | Wholesale & retail | 2012 |
| Newman Infrastructure Ltd | Professional & scientific | 2026 |
| Ngnuity Limited | Professional & scientific | 2014 |
| Nick Kenchington Limited | Professional & scientific | 2003 |
| Ninebarrow Ltd | Construction | 2025 |
| NO7 Catering Ltd | Hospitality | 2025 |
| Norden Campsite Limited | Hospitality | 2023 |
| Norden Shop Limited | Wholesale & retail | 2023 |
| Norton Management Consultancy Ltd | Professional & scientific | 2020 |
| NOT Just Sundaes Limited | Health & social care | 2012 |
| NRL Tiling Ltd | Construction | 2018 |
| Number 7 Blenheim Road Management Limited | Real estate | 1991 |
| Nusara Limited | Hospitality | 2019 |
| Oak International Transport Ltd. | Transport & logistics | 1992 |
| Object Oriented Analysis & Design Limited | Information & communication | 1994 |
| Obnf Limited | Hospitality | 2025 |
| Ocean Origin Ltd | Agriculture & fishing | 2023 |
| Oeau Water Limited | Manufacturing | 2026 |
| Old Brewery Management Company (Wareham) Limited | Administrative & support | 1985 |
| Olsen Investments Ltd | Households | 2026 |
| Olympia Triumph International Limited | Extraterritorial | 2001 |
| Olympia Triumph Manufacturing Limited | Manufacturing | 1990 |
| Omnistrong Ltd | Arts & recreation | 2024 |
| One Basket Ltd | Professional & scientific | 2024 |
| Opalrise Properties Limited | Real estate | 1999 |
| Operator Competitions Ltd | Arts & recreation | 2026 |
| Optimus Building Contractors Ltd | Construction | 2025 |
| Orchard Hill Limited | Professional & scientific | 2014 |
| Orchid Music Limited | Information & communication | 2004 |
| Osmund Rail Engineering Limited | Manufacturing | 2020 |
| Osprey Heli Services Limited | Manufacturing | 2019 |
| Otkg Trading Co Ltd | Financial services | 2023 |
| Outreach Services (Dorset) Ltd | Administrative & support | 2022 |
| Outsourcing Services Limited | Professional & scientific | 1995 |
| P & a Luker Hire Limited | Transport & logistics | 2016 |
| P & J Convenience Stores Limited | Wholesale & retail | 2003 |
| P.O. Brady Limited | Construction | 2003 |
| Paramount House Group Ltd | Real estate | 2014 |
| Paramount House Limited | Administrative & support | 1987 |
| Paramount House Property Estates Ltd | Real estate | 1988 |
| PB Catering Ltd | Hospitality | 2017 |
| PBP Property Group (Chartland) Ltd | Construction | 2020 |
| PBP Property Group (Kennel Close) Ltd | Construction | 2022 |
| PBP Property Group Ltd | Financial services | 2019 |
| PEI Ltd | Information & communication | 2006 |
| Perfect Household Staff Ltd | Administrative & support | 2010 |
| Perry Property Investments Ltd | Hospitality | 2024 |
| Peter John Gould Agronomy Ltd | Agriculture & fishing | 2023 |
| Pharma Control Systems Limited | Construction | 2007 |
| Phillips Groundworks Ltd | Construction | 2018 |
| Phoenixbyella Ltd | Wholesale & retail | 2021 |
| PHR (2015) Ltd | Construction | 2014 |
| Picture Frame Workshop (Purbeck) Ltd | Wholesale & retail | 2019 |
| Pipetec Hydraulics Ltd | Professional & scientific | 2024 |
| Pippa Punch Design Ltd | Information & communication | 2018 |
| PJE Engineering Ltd | Professional & scientific | 2023 |
| Poketekuk Ltd | Wholesale & retail | 2025 |
| Poolcirc Ltd | Construction | 2026 |
| Poole Maids Ltd | Administrative & support | 2024 |
| Poole Sailing Ltd | Arts & recreation | 2003 |
| Poole Sailors Story Museum Ltd | Arts & recreation | 2022 |
| Post & Rail Limited | Professional & scientific | 2015 |
| Postcard Prints Ltd | Wholesale & retail | 2025 |
| Probity Education Ltd | Education | 2017 |
| Probity Teaching Ltd | Education | 2021 |
| Professional Links Partnership Limited | Administrative & support | 2010 |
| Property Residential Limited | Real estate | 2018 |
| Purbeck & Dorset Homes Ltd | Construction | 2020 |
| Purbeck Chocolate Limited | Manufacturing | 2020 |
| Purbeck Electrical Contracting Limited | Construction | 2010 |
| Purbeck Footprints Ltd | Professional & scientific | 2011 |
| Purbeck Gelato Limited | Manufacturing | 2020 |
| Purbeck Home Services Ltd | Real estate | 2021 |
| Purbeck Ice Cream Limited | Manufacturing | 2005 |
| Purbeck Media Group Ltd | Other services | 2017 |
| Purbeck Park Homes Ltd | Real estate | 2025 |
| Purbeck Pets Limited | Wholesale & retail | 2007 |
| Purbeck Plumbing Heating & Drainage Ltd | Construction | 2014 |
| Purbeck Property (Lettings) Ltd | Real estate | 2024 |
| Purbeck Property (Wareham) Limited | Real estate | 2016 |
| Purbeck PUB Company Ltd | Hospitality | 2024 |
| Purbeck Sports Car Storage Ltd | Transport & logistics | 2022 |
| Purbeck Sports Cars Limited | Wholesale & retail | 2015 |
| Purbeck Toastmasters Ltd | Transport & logistics | 2017 |
| Purbeck Wholefoods (Wareham) LLP | | 2017 |
| Purbeck Wholefoods Limited | Financial services | 2020 |
| Purbeck Wind Farm LLP | | 2009 |
| PW Commercial Services Limited | Professional & scientific | 2016 |