| Salterns Marine Limited | Extraterritorial | 1982 |
| Salum Properties Limited | Real estate | 1997 |
| Salus Environmental and Safety Ltd | Health & social care | 2026 |
| Salva Interior Limited | Health & social care | 2024 |
| SAM C Coaching Ltd | Public administration | 2019 |
| SAM Davies Paraplanning Ltd | Administrative & support | 2026 |
| SAM Howell Ltd | Other services | 2010 |
| SAM Strongman Ltd | Information & communication | 2025 |
| SAM Willoughby PT Ltd | Arts & recreation | 2026 |
| Sam's Garage Ltd | Information & communication | 2026 |
| Samantha Crawford Productions Ltd | Arts & recreation | 2025 |
| Samantha Deakin Limited | Wholesale & retail | 2023 |
| Samatt (Group Services) Limited | Professional & scientific | 2004 |
| Samatt Holdings Ltd | Professional & scientific | 2020 |
| Samatt Limited | Professional & scientific | 1983 |
| Samcom Radio Limited | Extraterritorial | 2018 |
| Sameday Courier Network Ltd | Transport & logistics | 2014 |
| Sames Trade Limited | Hospitality | 2024 |
| Samleigh Court RTM Company Limited | Real estate | 2020 |
| Sammykeh Limited | Professional & scientific | 2025 |
| Sampson Heating Limited | Construction | 2016 |
| Samson Landscapes Limited | Administrative & support | 2019 |
| Samurai Jake Limited | Professional & scientific | 2010 |
| SAN Antonio Management Limited | Households | 1998 |
| SAN Remo Towers (SRT) Freehold Ltd | Households | 2019 |
| Sana Bournemouth Limited | Wholesale & retail | 2009 |
| Sanda Cleaning Ltd | Administrative & support | 2024 |
| Sandbanks Covers Ltd | Manufacturing | 2015 |
| Sandbanks Fine Products Ltd | Wholesale & retail | 2022 |
| Sandbanks Hotel Limited | Hospitality | 1955 |
| Sandbanks Jetski Company Ltd | Arts & recreation | 2020 |
| Sandbanks Roofing Limited | Construction | 2025 |
| Sandbanks Souvenirs Ltd | Wholesale & retail | 2023 |
| Sandbanks Stays Ltd | Hospitality | 2025 |
| Sandbourne Asset Management Ltd. | Financial services | 2015 |
| Sandbourne Courtyard Limited | Real estate | 1979 |
| Sandbourne Financial Planning Limited | Professional & scientific | 2024 |
| Sandbourne Management Company Limited | Households | 2010 |
| Sandbourne Mews Limited | Real estate | 1979 |
| Sandcastle Nursery & Preschool Limited | Education | 2011 |
| Sanderling Management Company Limited | Real estate | 2000 |
| Sandford Group LLP | | 2018 |
| Sandhaven Court Management Company Limited | Households | 1988 |
| Sandon House Management Limited | Households | 2006 |
| Sandown Court (Bournemouth) Property Limited | Households | 2002 |
| Sandpalm Properties Limited | Real estate | 1989 |
| Sandra S Salon Ltd | Other services | 2025 |
| Sandraz Ltd | Administrative & support | 2016 |
| Sandridge Management Limited | Households | 2016 |
| Sandro & Sons Property Services Limited | Real estate | 2024 |
| Sandro Business Limited | Real estate | 2021 |
| SANDS2 Limited | Hospitality | 2002 |
| Sandy Feat Limited | Hospitality | 1995 |
| Sandy Lane (Poole) Management Limited | Households | 2010 |
| Sandy Lane Capital Ltd | Professional & scientific | 2020 |
| Sandy Reach (Southbourne) RTM Company Limited | Households | 2006 |
| Sandy Toes of Southbourne Limited | Real estate | 2022 |
| Sandybank Seven Residents Association Limited | Households | 1993 |
| Sanitech Ltd | Wholesale & retail | 2022 |
| Sanity Square LLP | | 2022 |
| Sanshore Court Management Company Limited | Households | 2009 |
| Santana Fittings Ltd | Other services | 2023 |
| Sante Beauty Therapy Limited | Other services | 2004 |
| Santey Property Ltd | Real estate | 2022 |
| Sanukah Limited | Wholesale & retail | 2025 |
| Sanyfiroozi & Partner Limited | Hospitality | 2025 |
| Sapware Consultancy Limited | Information & communication | 2005 |
| Sara Caroline Limited | Wholesale & retail | 2025 |
| Sarah Aqua Limited | Professional & scientific | 2013 |
| Sarah Herbert Limited | Education | 2013 |
| Sarah Ltd | Professional & scientific | 2003 |
| Sarah-Jane LEA (Building Design) Limited | Professional & scientific | 2003 |
| Sarah-Louise Medical Aesthetics Ltd | Other services | 2024 |
| Sarah’S Angels Cleaning Company Ltd | Extraterritorial | 2024 |
| Saranti LLP | | 2019 |
| Sarita Electrical & Renewables Ltd | Construction | 2026 |
| Sarmanco Limited | Households | 1993 |
| Sarum Court Limited | Households | 1993 |
| SAS Drive Ltd | Wholesale & retail | 2018 |
| Saspod Ltd | Manufacturing | 2023 |
| Sassy Tails Ltd | Wholesale & retail | 2025 |
| Satao Group (UK) Ltd. | Construction | 2016 |
| Satellite and Homecare Limited | Other services | 2013 |
| Sathu Ltd | Wholesale & retail | 2017 |
| Satnam Group Ltd | Transport & logistics | 2025 |
| Satori Enterprises LLP | | 2015 |
| Satori IT Limited | Information & communication | 2019 |
| Satori Skin and Beauty Ltd | Other services | 2025 |
| Saul Developments Limited | Wholesale & retail | 2014 |
| Savage Minds Limited | Information & communication | 2004 |
| Save Services Limited | Manufacturing | 2023 |
| Save the Moment Ltd | Wholesale & retail | 2012 |
| Sawyer Project Control Ltd | Professional & scientific | 2014 |
| Saxe Coburg Ltd | Real estate | 2014 |
| Saxo Bar Ltd | Hospitality | 2022 |
| Saxon Construction Limited | Real estate | 2003 |
| Saxon Entertainment Ltd | Information & communication | 2018 |
| Saxon Impex Ltd | Wholesale & retail | 2021 |
| Saxon Publishing Ltd | Information & communication | 2019 |
| Saxon Willow Property Management Ltd | Real estate | 2025 |