| Sele Mill Residents Company Limited | Households | 1995 |
| Selling Ideas Limited | Professional & scientific | 2024 |
| Semro Limited | Hospitality | 2013 |
| Serpentine Walk Management Company Limited | Households | 2009 |
| SFT Customs Ltd | Wholesale & retail | 2022 |
| SH Global Enterprise Ltd | Professional & scientific | 2025 |
| Shaul House Management Company Limited | Households | 1995 |
| Shaw Software Consultants Limited | Information & communication | 2003 |
| Shelburne Court Putney Limited | Households | 1998 |
| Shepherd Financial Guidance Limited | Financial services | 2015 |
| Shepherd Financial Research Limited | Financial services | 2025 |
| Sherford 1A Parcel 4 Management Company Ltd | Households | 2019 |
| Sherford 1A Parcel 5 Management Company Ltd | Households | 2019 |
| Sherford 1B Parcel Efgj Management Company Limited | Households | 2022 |
| Sherford Estate Management Company Limited | Households | 2016 |
| Sherford Estate Parcel P Management Company Limited | Households | 2018 |
| Sherford Estate Parcel Q Management Company Limited | Households | 2019 |
| Shore Line Roofing Limited | Financial services | 2017 |
| Shorelands (Bude) Management Company Limited | Households | 2013 |
| Shortlands Lane (Cullompton) Management Company Limited | Real estate | 2011 |
| Shree Ashapura Enterprise Limited | Wholesale & retail | 2025 |
| Shunfa Takeaway Limited | Hospitality | 2024 |
| Silchester Court (Ashford) Management Company Limited | Households | 1999 |
| Silk Meadows (Braintree) Management Company Limited | Real estate | 2014 |
| Silsoe (College Farm) Management Company Limited | Households | 2008 |
| Silsoe Grange Management Company Limited | Households | 2012 |
| Silver FOX Productions Limited | Information & communication | 2011 |
| Silver Rose Film Services Limited | Information & communication | 2012 |
| Silver Sparks Ltd | Construction | 2008 |
| Silver Street Nursery Limited | Agriculture & fishing | 2003 |
| SIR Vapealot Ltd | Wholesale & retail | 2014 |
| SJA Plumbing and Heating Limited | Other services | 2019 |
| Skart International Ltd | Other services | 2018 |
| Sketch N Design Ltd | Professional & scientific | 2023 |
| Sketchley Gardens Nuneaton Management Company Limited | Households | 2022 |
| Skyline Partnership Limited | Professional & scientific | 2013 |
| Small Cars Direct Limited | Wholesale & retail | 2016 |
| Smiths Mill (Wantage) Management Company Limited | Households | 2006 |
| SMP Pressure Cleaning Limited | Administrative & support | 2016 |
| Snowmire Limited | Households | 1981 |
| Social Management Accountability Reporting Training Foundation Limited | Education | 2018 |
| Sofa Savers Ltd | Other services | 2024 |
| Sofia Penelope Atkinson Limited | Extraterritorial | 2022 |
| Solent Breeze Management Company Limited | Real estate | 2000 |
| Solent Photography Limited | Professional & scientific | 2011 |
| Solos Ltd | Professional & scientific | 2007 |
| Solution 80 Ltd | Manufacturing | 2014 |
| Somer Mews (Radstock) Management Company Limited | Households | 2013 |
| Somerley Court Management Limited | Real estate | 2008 |
| Sonnet Park (Stratford) Management Company Limited | Households | 2023 |
| South Coast Caravans Limited | Hospitality | 2022 |
| South Coast Electrical Contractors Ltd | Construction | 2018 |
| South Coast Retreats Limited | Hospitality | 2021 |
| South Coast Shine Ltd | Administrative & support | 2026 |
| South Grange Exeter Flats 27-30 RTM Company Limited | Households | 2015 |
| South Grange Exeter Flats 35-38 RTM Company Limited | Households | 2015 |
| South Quarter Management Company Limited | Households | 2007 |
| South Sands Torbay Road Management Company Limited | Households | 2012 |
| South West Burnley Management Company Limited | Households | 2008 |
| Southam Fields Exeter Management Company Limited | Households | 2006 |
| Southam Grange Management Company Limited | Households | 2015 |
| Southbrook House (Newbury) Management Company Limited | Real estate | 2020 |
| Southcoast GT Logistics Ltd | Transport & logistics | 2018 |
| Southern Counties Cleaning Ltd | Administrative & support | 2026 |
| Southern Court Management Company Limited | Households | 2016 |
| Southern Plastering Ltd | Construction | 2024 |
| Southern Skilled Resources Limited | Administrative & support | 1994 |
| Southmoor Grange Residents Management Company Limited | Households | 2013 |
| Southview Park (Apartments 167 - 175) Management Company Limited | Households | 2013 |
| Southview Park Apartments Management Company Limited | Households | 2016 |
| Sovereign and Regency Limited | Hospitality | 2025 |
| Sovereign Court Residents Company Limited | Households | 1998 |
| Sovereign Park (Liversedge) Management Company Limited | Households | 2007 |
| Sovereign Place (Horley) Management Company Limited | Households | 2016 |
| Sovereing and Regency Ltd | Hospitality | 2026 |
| Spa Court Management Limited | Households | 1994 |
| Space Transform Limited | Construction | 2017 |
| Spectrum Mouthguards Ltd | Manufacturing | 2009 |
| Spectrum Trade Limited | Wholesale & retail | 2025 |
| Spencer Court (New Milton) Freehold Limited | Real estate | 2023 |
| Spencer Court (New Milton) Limited | Households | 1966 |
| SPK Associates Limited | Health & social care | 2017 |
| Spring Fields (Ibstock) Management Company Limited | Households | 2018 |
| Spring Meadows (Sandtoft) Management Company Limited | Households | 2026 |
| Spring Park Management Company Limited | Households | 2016 |
| Springfield Farm (Ambrosden) Management Company Limited | Households | 2014 |
| Springfield Gardens (Heath Charnock) Management Company Limited | Households | 2012 |
| Springfield Place Resident Management Company Limited | Households | 2021 |
| Springfields (Deeping ST James) Managing Company Limited | Households | 2019 |
| Springle Sprangle Ltd | Households | 2026 |
| Springwell (Kegworth) Management Company Limited | Households | 2005 |
| Sprout Hub Limited | Administrative & support | 2024 |
| SQL Framework Limited | Information & communication | 2011 |
| Square Court (ST Georges) Management Company Limited | Households | 2003 |
| SRP Services (New Forest) Limited | Construction | 2023 |
| SS18 Phase 1 (Fordingbridge) Management Company Limited | Households | 2023 |
| ST Andrews (Uxbridge) Management Company Limited | Households | 2014 |
| ST Andrews at Biddenham Management Company Limited | Professional & scientific | 2016 |
| ST Andrews Park (Phase 6 Uxbridge) Estate Management Company Limited | Households | 2018 |
| ST Andrews Park (Vine Lane 2A) Management Company Limited | Households | 2014 |