| Sanderson Accelera Ltd | Professional & scientific | 2025 |
| Sandhurst Development Trust | Administrative & support | 2025 |
| Sandhurst Enterprises Limited | Wholesale & retail | 2014 |
| Sandhurst MOT Centre Ltd | Wholesale & retail | 1994 |
| Sandhurst Trust | Administrative & support | 2013 |
| Sandiford (London) Ltd | Administrative & support | 2016 |
| Sandown Coachworks Camberley Ltd | Wholesale & retail | 2019 |
| Sandown Coachworks Shepperton 2 Ltd | Wholesale & retail | 2025 |
| Sanguine LEO Ltd | Information & communication | 2021 |
| Santos Car Repairs Limited | Wholesale & retail | 2017 |
| Sanyaolu Limited | Information & communication | 2010 |
| Sapheads Limited | Information & communication | 2012 |
| Sapientia Intellectus Ltd | Information & communication | 2024 |
| Sara Eden Introductions Limited | Other services | 2006 |
| Sarah Beaton Violins Ltd | Manufacturing | 2014 |
| Sarah Shearer Services Ltd | Extraterritorial | 2025 |
| Sarah White Cottages Broad Oak Management Company Limited | Households | 2005 |
| Sargent Services Limited | Information & communication | 2025 |
| SAS Drainage & Groundworks Limited | Construction | 2015 |
| SAS Drains Limited | Construction | 2019 |
| Saturn Running TOO Limited | Arts & recreation | 2023 |
| Saumyaanoop Estate Ltd | Real estate | 2018 |
| Savanta Limited | Professional & scientific | 2008 |
| Save Your Day Films Limited | Information & communication | 2015 |
| Savigny Consulting Ltd | Other services | 2020 |
| Sawadee Film SET Services Ltd | Construction | 2023 |
| Saxby Title Limited | Professional & scientific | 1998 |
| Saxon Heating Limited | Construction | 2018 |
| Saxon Housing Limited | Real estate | 2021 |
| Saxons Investments Limited | Real estate | 2011 |
| SAY Mama Ltd | Wholesale & retail | 2022 |
| SB Carpentry and Joinery Limited | Construction | 2011 |
| SBG Miners Ltd | Hospitality | 2019 |
| SBH Consultants Limited | Construction | 2012 |
| Scale Studios Business Ltd | Professional & scientific | 2026 |
| SCB Healthcare Limited | Health & social care | 2011 |
| Schmant Ltd | Other services | 2015 |
| Schollick Consulting Ltd | Professional & scientific | 2022 |
| School Run Tender Ltd | Transport & logistics | 2024 |
| Schuest Ltd | Information & communication | 2012 |
| Scintilla Blue Limited | Information & communication | 2024 |
| Scintilla Ventures Limited | Professional & scientific | 2025 |
| Sciurus Consulting Limited | Professional & scientific | 2007 |
| SCJ UK Finco Ltd | Administrative & support | 2015 |
| Scott a P Miller Limited | Information & communication | 2014 |
| Scott Bonella Limited | Professional & scientific | 2000 |
| Scott Fraser Limited | Real estate | 2005 |
| Scriptease Television Ltd | Administrative & support | 2010 |
| Scrumpot Ltd | Wholesale & retail | 2020 |
| Scuderia Prestige Automobile Ltd | Wholesale & retail | 2019 |
| Scures Hill Developments Ltd | Construction | 2019 |
| SD Pro Team Ltd | Other services | 2023 |
| SDC Property Holdings Limited | Real estate | 2025 |
| Seaham Hall Property Title Limited | Professional & scientific | 2012 |
| Seaman Property Investments Ltd | Extraterritorial | 2024 |
| Seamless AV Installations Ltd | Construction | 2016 |
| Seasons Hotel Title Limited | Professional & scientific | 1995 |
| Seasons Title Limited | Professional & scientific | 1997 |
| Seasons Title NO.2 Limited | Professional & scientific | 2015 |
| Seastone Search Limited | Administrative & support | 2019 |
| SEB Communications Ltd | Information & communication | 2015 |
| Sebah Automotive Limited | Wholesale & retail | 1995 |
| SEC Aviation Consultants Ltd | Transport & logistics | 2023 |
| Second Rivermead Management Company (Liss) Limited | Households | 1981 |
| Secure Bridge Tech Ltd | Information & communication | 2023 |
| Secure Client Solutions Limited | Manufacturing | 2025 |
| Secured Asset Properties Limited | Real estate | 2015 |
| Securemove Property Management Limited | Households | 1986 |
| SEE and Treat Healthcare Ltd | Health & social care | 2018 |
| SEE Management Ltd | Real estate | 2026 |
| Seek Vision Limited | Information & communication | 2019 |
| Seesam Empire Ltd | Hospitality | 2025 |
| SEF Centre Ltd | Health & social care | 2022 |
| SEI Contractor Limited | Construction | 2018 |
| SEI Home Investments Limited | Real estate | 2022 |
| Selectproof Company Limited | Construction | 1992 |
| Selfiya Ltd | Construction | 2018 |
| Semee House Improvement Limited | Construction | 2017 |
| Semet Aviation Limited | Education | 2021 |
| SEN Outcomes Ltd | Education | 2021 |
| Senate Air Conditioning Ltd | Energy | 2026 |
| Sengland Accounting Ltd | Professional & scientific | 2022 |
| Senior MAC Photography Limited | Professional & scientific | 2013 |
| Sennen Estate Management Limited | Real estate | 2024 |
| Sennen Property Maintenance Ltd | Administrative & support | 2022 |
| Sennen Property Management Limited | Real estate | 2015 |
| Sensesay Technologies Limited | Professional & scientific | 2018 |
| Sensus Consulting Limited | Professional & scientific | 2015 |
| Sentience Automotive Solutions Ltd | Professional & scientific | 2011 |
| Seon Growth Ltd | Professional & scientific | 2019 |
| Serama Limited | Information & communication | 2024 |
| Serene Chauffeur Cars Ltd | Transport & logistics | 2021 |
| Serenity Beauty Business Limited | Other services | 2017 |
| Serenity Hair Camberley Ltd | Other services | 2021 |
| Serenity Hair Health & Wellbeing Ltd | Wholesale & retail | 2024 |
| Serenity Health Technologies Ltd | Information & communication | 2022 |
| Serenity Real Estates Ltd | Real estate | 2019 |
| SET and Social Padel Limited | Arts & recreation | 2025 |
| Seven Nine Langland Ltd | Real estate | 2009 |
| Seya Driving School Ltd | Education | 2023 |