| QED Technologies Ltd | Manufacturing | 2025 |
| QM Hydraulic Services Ltd | Manufacturing | 2026 |
| Quantsport Capital Ltd | Information & communication | 2023 |
| Quay Manufacturing Ltd | Manufacturing | 2021 |
| Quest Holdings Limited | Professional & scientific | 1986 |
| Quest Underwater Services Limited | Construction | 1978 |
| R a Harvey (Ridge) Limited | Construction | 1998 |
| R V Miller Limited | Construction | 2003 |
| R.P.S Commercial Ltd | Professional & scientific | 2024 |
| R.T Global Commerce Limited | Wholesale & retail | 2018 |
| R.T Global Property Relocations Ltd | Hospitality | 2023 |
| Raglan Management Limited | Households | 2018 |
| Rangesports and Etched Art Ltd | Manufacturing | 2001 |
| Raven Advisory Ltd | Professional & scientific | 2026 |
| RCL Accountants Ltd | Professional & scientific | 2024 |
| Re-Design Solutions Limited | Construction | 2024 |
| Red Press Ltd. | Other services | 2011 |
| Redmans Sand Limited | Mining & quarrying | 2016 |
| Relec Electronics Limited | Wholesale & retail | 1978 |
| Rempstone Estate Trustees Limited | Administrative & support | 2012 |
| Rempstone Internet Limited | Administrative & support | 2021 |
| Rempstone Studio Ltd | Arts & recreation | 2025 |
| René William Ltd | Professional & scientific | 2017 |
| Replacement Stove Glass Ltd | Wholesale & retail | 2011 |
| Resort Management Ltd | Professional & scientific | 2024 |
| Retrospection Limited | Wholesale & retail | 2022 |
| REX Cinema Wareham | Arts & recreation | 1998 |
| Richardson Family Parking Ltd | Transport & logistics | 2025 |
| Riva Interiors Ltd | Construction | 2017 |
| Riverbend Purbeck Ltd | Construction | 2023 |
| Rivis Group Ltd | Wholesale & retail | 2024 |
| RJ Electrical (Dorset) Ltd | Construction | 2018 |
| Robyns Rentals Ltd | Real estate | 2025 |
| Rock Ride & Tide Ltd | Education | 2023 |
| RS Analytical Solutions Ltd | Administrative & support | 2018 |
| RT Wareham Ltd | Hospitality | 2016 |
| Rufus Knight-Webb Limited | Professional & scientific | 2006 |
| Rushford Ltd | Professional & scientific | 2018 |
| Ryder Trustees Limited | Administrative & support | 2012 |
| S & G Fitness LLP | | 2024 |
| S Colaco & Associates Limited | Health & social care | 2018 |
| S J Mortimore Associates Limited | Public administration | 2013 |
| S T H Cropping Limited | Agriculture & fishing | 2005 |
| S.J.Allen Consulting Ltd. | Professional & scientific | 2016 |
| Safe Partnership Limited | Health & social care | 1987 |
| Safer Horizons Limited | Health & social care | 2025 |
| Saflyn Design Limited | Manufacturing | 1999 |
| Saisha Properties Limited | Real estate | 2025 |
| Saki Ltd | Hospitality | 2024 |
| Salmon Sports Ltd | Wholesale & retail | 2018 |
| Salo Creative Ltd | Information & communication | 2019 |
| Saltfire Stoves Ltd | Wholesale & retail | 2008 |
| SAN Distributions Ltd | Wholesale & retail | 2026 |
| Sandford House (Wareham) Management Company Limited | Households | 1981 |
| Sandy Toes Limited | Hospitality | 2023 |
| Saxon Mews (Trinity Lane) Management Company Limited | Households | 2014 |
| SB Electrical (Dorset) Ltd | Construction | 2012 |
| Scott Estate Capital Limited | Financial services | 2022 |
| SDS Treeworks Ltd | Agriculture & fishing | 2022 |
| Sea Eagle Group Ltd | Professional & scientific | 2020 |
| Sea Goat Productions Ltd | Administrative & support | 2026 |
| Sea Stone Stays Ltd | Hospitality | 2021 |
| Sea Yourself Counselling Ltd | Health & social care | 2026 |
| Seaside Property Ltd | Real estate | 2022 |
| Seedo Media Ltd | Information & communication | 2019 |
| Sharp Road Estates Limited | Real estate | 2001 |
| Sharpe Creative Designs Ltd | Professional & scientific | 2025 |
| Shim Stock Metals UK Ltd | Manufacturing | 2024 |
| Shinbuild Limited | Construction | 1998 |
| Shoreside Securities Limited | Administrative & support | 2015 |
| Show Techniques Limited | Information & communication | 2004 |
| Shutelake Coffee Ltd | Other services | 2019 |
| Sika Deer Properties Ltd | Hospitality | 2021 |
| Simon Cross 1412 Limited | Professional & scientific | 2024 |
| Sjct Holdings Ltd | Financial services | 2026 |
| Smith & Co Property Services Limited | Real estate | 2002 |
| Sobo Properties Limited | Real estate | 2017 |
| Sooty the Sweep Limited | Professional & scientific | 2011 |
| South Coast Health Retreats Limited | Arts & recreation | 2026 |
| South Coast Window & Gutter Cleaning Ltd | Administrative & support | 2025 |
| South Dorset Hunt Limited | Agriculture & fishing | 2017 |
| South Dorsetshire Auctioneers Ltd | Wholesale & retail | 2021 |
| Southern Playground Services Ltd | Administrative & support | 2019 |
| Spdolan Limited | Professional & scientific | 2025 |
| Squire Technologies Limited | Information & communication | 2002 |
| STA Property Investments South Limited | Households | 2024 |
| STA Property Management South Limited | Real estate | 2024 |
| Steam & Stream Swanage Ltd | Hospitality | 2026 |
| Stein Works Limited | Construction | 2003 |
| Stone Ridge Property Solutions Ltd | Construction | 2025 |
| Storage Systems Services Limited | Construction | 1999 |
| Street Address Properties Ltd | Households | 2025 |
| Studio Print Ltd | Manufacturing | 2018 |
| Sundance Electronic Systems Ltd | Manufacturing | 2015 |
| Sunnydale Gardening Services Limited | Administrative & support | 2024 |
| Sunset Developments Ltd | Construction | 2020 |
| Sutton Place (Swanage) Management Limited | Households | 2016 |
| Swallow Close Limited | Households | 2000 |
| Sxmcomms Ltd | Construction | 2023 |
| Synergy Hairdressing Limited | Other services | 2005 |