| Saxonbury Road Limited | Education | 2008 |
| Saxonhurst Homes Ltd | Real estate | 2019 |
| Saya Property Investments Ltd | Real estate | 2018 |
| Sayda Organic Ltd | Wholesale & retail | 2019 |
| SB Creative Designs Ltd | Arts & recreation | 2017 |
| SB Fixers Ltd | Construction | 2022 |
| SB Nehir Limited | Wholesale & retail | 2019 |
| SB Signature Ltd | Wholesale & retail | 2022 |
| Sbaa 5613 Limited | Wholesale & retail | 2022 |
| SBB Plumbing Ltd | Construction | 2023 |
| Sbpm Ltd | Professional & scientific | 2014 |
| SBS Data Labs Ltd | Information & communication | 2018 |
| SC (South) Ltd | Construction | 2016 |
| SC 24/7 Roofing Ltd | Construction | 2026 |
| SC Decor Limited | Construction | 2019 |
| SC Electric Bournemouth Electrician Ltd | Construction | 2022 |
| SC Plus Ltd | Administrative & support | 2001 |
| SC Sea & Soul Ltd | Hospitality | 2025 |
| Scafell Properties (Lansdowne House) Limited | Real estate | 2022 |
| Scafell Properties (Pine Grange) Limited | Real estate | 2023 |
| Scalewave Digital Limited | Professional & scientific | 2025 |
| Scan Cloud Design Limited | Professional & scientific | 2025 |
| Scape Interiors West Ltd | Wholesale & retail | 2008 |
| Scarlet Aviation Limited | Professional & scientific | 2011 |
| Scarlett Bakes Cakes Limited | Manufacturing | 2021 |
| SCD Plumbing Limited | Construction | 2016 |
| Scelford Maritime Ltd | Administrative & support | 2023 |
| Scenic Consultants Limited | Professional & scientific | 2000 |
| Scenic Grounds Limited | Administrative & support | 2013 |
| SCG MB Limited | Administrative & support | 2024 |
| Schiebel UK Limited | Manufacturing | 2026 |
| Schofield Projects Ltd | Administrative & support | 2026 |
| Schofields Accountants Limited | Professional & scientific | 2022 |
| School Hill Management Company Limited | Households | 2023 |
| School Travel Education Ltd | Administrative & support | 2017 |
| Schooner Marine LLP | | 2006 |
| Schweeet Ltd | Hospitality | 2015 |
| SCL Tech Investments Ltd | Information & communication | 2024 |
| SCM Build Limited | Construction | 2016 |
| Scoaries Consulting Limited | Wholesale & retail | 2024 |
| Scooteria Limited | Wholesale & retail | 2000 |
| Scope Landscapes Ltd | Administrative & support | 2025 |
| Scope Team Ltd | Administrative & support | 2019 |
| Scorably Ltd | Information & communication | 2026 |
| Scott C Burgess Ltd | Administrative & support | 2018 |
| Scott Shearing Vehicle Repairs Ltd | Wholesale & retail | 2015 |
| Scott Squared Limited | Administrative & support | 2023 |
| Scott Tree Services Ltd | Agriculture & fishing | 2002 |
| Scotts Pro Limited | Administrative & support | 2025 |
| Scout Social Ltd | Professional & scientific | 2023 |
| SCR Caterers Limited | Hospitality | 2025 |
| Scramble Sports Ltd | Wholesale & retail | 2010 |
| Scrd Investments Limited | Real estate | 2013 |
| Screen London Limited | Professional & scientific | 2019 |
| Scribe London Lofts Limited | Construction | 2014 |
| Scrubbers Limited | Administrative & support | 2022 |
| Scrubz Cleaning Solutions Ltd | Administrative & support | 2025 |
| SCS Damp Specialists Ltd | Construction | 2023 |
| SCS Media Ltd | Wholesale & retail | 2023 |
| SCS Training Limited | Education | 2021 |
| Scuba & Stationery Services Ltd | Wholesale & retail | 2022 |
| Scudamore Electra Limited | Real estate | 2017 |
| Scudamore Fitzgerald Limited | Real estate | 2017 |
| Sculptique 360 Ltd | Other services | 2025 |
| Scya Limited | Other services | 2016 |
| SD Howell Ltd | Administrative & support | 2018 |
| SD Tech Systems Limited | Information & communication | 2023 |
| Sd&H Limited | Hospitality | 2025 |
| Sdaf Group Limited | Financial services | 2024 |
| Sdaf Limited | Transport & logistics | 2019 |
| SDB Brothers Ltd | Transport & logistics | 2017 |
| SDB Consultancy Limited | Professional & scientific | 2014 |
| Sdgm Ltd | Hospitality | 2018 |
| SDL Business Development Ltd | Professional & scientific | 2026 |
| Sdphm Ltd | Construction | 2025 |
| Sdrm Ltd | Other services | 2025 |
| SDS Bluebook Ltd | Professional & scientific | 2018 |
| SDS Building (Dorset) Limited | Construction | 2011 |
| Sea Haven Ltd | Construction | 2021 |
| Sea Breeze Freehold Limited | Real estate | 2015 |
| Sea Breeze Property Services Ltd | Administrative & support | 2019 |
| Sea Road Properties Limited | Households | 2022 |
| Sea Road Property Limited | Real estate | 2020 |
| Sea Sword Ltd | Professional & scientific | 2023 |
| Sea View Court RTM Company Limited | Households | 2015 |
| Sea View Management (Bournemouth) Limited | Households | 2005 |
| Seabed Properties Ltd | Households | 2019 |
| Seabreeze Blue Ltd | Information & communication | 2015 |
| Seacompsuk Limited | Other services | 2025 |
| Seacote Leasehold Residents Company Limited | Households | 2006 |
| Seacote Residents Company Limited | Households | 2006 |
| Seacraft Marine Limited | Other services | 2004 |
| Seacrest Management Company (Southbourne) Limited | Households | 2008 |
| Seadog Homes Ltd | Real estate | 2025 |
| Seaescape Decorating Ltd | Construction | 2022 |
| Seaescape Homes Ltd | Real estate | 2023 |
| Seaflow Enterprises Limited | Wholesale & retail | 2025 |
| Seaforth Services South Ltd | Construction | 2021 |
| Seafront Minimarket Ltd | Wholesale & retail | 2022 |
| Seahaven Freehold Limited | Households | 2004 |