| Norse Muaythai & Boxing Gym Ltd | Arts & recreation | 2024 |
| Northams Accountants Limited | Professional & scientific | 2019 |
| Northcott Cleaning Services Ltd | Administrative & support | 2012 |
| Northmostown Court Management Co. Limited | Households | 1987 |
| November March Limited | Financial services | 2011 |
| NSG Financials Ltd | Professional & scientific | 2010 |
| Oak Homes Joinery Ltd | Manufacturing | 2018 |
| Oak Mead Golf Course Limited | Arts & recreation | 2008 |
| Oak Road (2021) Ltd | Real estate | 2021 |
| Ocean Therapies for Children and Families Limited | Health & social care | 2025 |
| Octavia Strategy Ltd | Professional & scientific | 2025 |
| Offaly Good Treats Limited | Manufacturing | 2023 |
| ON the GLO Ltd | Administrative & support | 2025 |
| One Spring Gardens Property Ltd | Real estate | 2021 |
| Orchard Autos (Potters Bar) Limited | Wholesale & retail | 1975 |
| Orchardside Management Company Limited | Households | 1975 |
| Osteo and Physio Sidmouth Ltd | Other services | 2021 |
| Otter Accountants Ltd | Professional & scientific | 2011 |
| Otter Electrical Ltd | Construction | 2013 |
| Otter Electrical Services Ltd | Construction | 2022 |
| Ottery ST Mary Carnival and TAR Barrels Ltd | Arts & recreation | 1996 |
| P & E Enterprises Ltd | Hospitality | 2025 |
| Packwest Limited | Wholesale & retail | 2025 |
| Pagoda Digital Limited | Information & communication | 2015 |
| Parc Catering Ltd | Hospitality | 2022 |
| Parsons and SON Builders Ltd | Construction | 2021 |
| Paul Ashby-Crane & SON Co Ltd | Wholesale & retail | 2010 |
| Paul Jeffries Architects Limited | Professional & scientific | 2016 |
| Pauntley Garden (Sidmouth) Ltd | Households | 2010 |
| Pawco Limited | Manufacturing | 2006 |
| PC Gym Limited | Information & communication | 1994 |
| PEA Green Boat Sidmouth Ltd | Hospitality | 2025 |
| Peak House Estate Limited | Real estate | 2023 |
| Peak Place Management Company Limited | Real estate | 2009 |
| Peak Travel Services Ltd. | Construction | 2002 |
| Pebble Brook Wellbeing Ltd | Health & social care | 2022 |
| Pegasus Property Management Ltd | Real estate | 2006 |
| Pembury Accountancy Services Ltd | Professional & scientific | 2015 |
| Peninsula Energy Compliance Limited | Professional & scientific | 2015 |
| Peter Marsh (Sidmouth) Limited | Manufacturing | 1951 |
| Petit Well House (Management) Limited | Real estate | 2004 |
| Phoenix (Sidmouth) Ltd | Hospitality | 2015 |
| PHS (Sidmouth) Limited | Construction | 2002 |
| Pickpocket Foragers Limited | Manufacturing | 2018 |
| Pincock Planet Limited | Professional & scientific | 2019 |
| Pinecones Nursery School Limited | Education | 2017 |
| Pinnacle (Sidmouth) Management Company Limited | Households | 2005 |
| Pioneer Cottages Management Company Limited | Households | 1982 |
| PIP and Stone Ltd | Agriculture & fishing | 2018 |
| Pippins Court Management Company Limited | Households | 2005 |
| Place Planning Limited | Professional & scientific | 2016 |
| Plant 4 Ltd | Administrative & support | 2015 |
| PMC Burton Properties Ltd | Real estate | 2022 |
| Pobby & Blue Ltd | Wholesale & retail | 2013 |
| Port Bredy Management Company Limited | Households | 1999 |
| Portfolio Selection Redux Limited | Information & communication | 2008 |
| Portland Lodge Management Limited | Households | 2004 |
| Prime Horizon Travel Ltd | Wholesale & retail | 2025 |
| Primrose Trading Ltd | Wholesale & retail | 2021 |
| Prodigy Capital Partners (Holdings) Limited | Extraterritorial | 2023 |
| Proworks Technology Ltd | Information & communication | 2023 |
| Psmc AG Limited | Construction | 2018 |
| Psmc Consultancy Limited | Professional & scientific | 2014 |
| Psmc Holdings Limited | Financial services | 2018 |
| Psmc Priory Limited | Construction | 2018 |
| Puppaloops Dog Grooming Ltd | Extraterritorial | 2022 |
| Pura Vida Limited | Hospitality | 2003 |
| Qtime Ltd | Manufacturing | 2017 |
| RAB Aero Limited | Professional & scientific | 2026 |
| Raff Analytics Ltd | Information & communication | 2023 |
| Raleigh House (Sidmouth) Limited | Households | 2009 |
| Raleigh Rail Ltd | Professional & scientific | 2015 |
| Ramsden Grove Ltd. | Construction | 2024 |
| Rare Muse Ltd | Professional & scientific | 2024 |
| Redcliff Court (Budleigh Salterton) Management Limited | Households | 1982 |
| Redferns Sidmouth Limited | Real estate | 2008 |
| Residential Trust Limited | Real estate | 1994 |
| REX Kirby Ltd | Professional & scientific | 2017 |
| RFC Financial Services Ltd | Financial services | 2011 |
| RHD Assets Limited | Real estate | 2026 |
| RHD Service Hub Limited | Wholesale & retail | 2025 |
| RHD Trading Limited | Wholesale & retail | 2018 |
| Ridgeway Residential Home Limited | Health & social care | 2003 |
| Rising Sun Sidford Ltd | Hospitality | 2022 |
| Robertson Marks Limited | Information & communication | 2024 |
| Roseland Court (Sidmouth) Management Company Limited | Households | 2021 |
| Rosemount Management (Sidmouth) Limited | Households | 2003 |
| Ross Kelway Limited | Professional & scientific | 2024 |
| Rowse Tree Services Limited | Agriculture & fishing | 2004 |
| S J Berisford Limited | Wholesale & retail | 2002 |
| Salcombe Court Management Company Limited | Households | 1982 |
| Salcombe Hill Investments Limited | Professional & scientific | 2014 |
| Sally Mcnally Holdings Limited | Extraterritorial | 2003 |
| Sally Mcnally Presents Limited | Administrative & support | 2003 |
| Sams Pubs Ltd | Hospitality | 2025 |
| Sandygate Hospitality Ltd | Hospitality | 2015 |
| Sanna Science Limited | Professional & scientific | 2023 |
| Scarsdale Flats Management Company Limited | Households | 1973 |
| Scnvr Ltd | Real estate | 2016 |
| Seabrease Limited | Other services | 2013 |