| Stereotest Limited | Manufacturing | 2003 |
| Sterling Alliance Services Ltd | Construction | 2019 |
| Sterling Computer Contracting Limited | Real estate | 1997 |
| Sterling Global Recuitment Ltd | Administrative & support | 2026 |
| Sterling House (Spalding) Management Company Limited | Households | 2006 |
| Sterling Oak UK Ltd | Hospitality | 2026 |
| Sterling Property Limited | Extraterritorial | 2015 |
| Sterling Skylights Ltd | Wholesale & retail | 2022 |
| Sterling Squared Ltd | Professional & scientific | 2025 |
| Sterling Wear Limited | Wholesale & retail | 2026 |
| Sterzeal Hats Limited | Wholesale & retail | 2021 |
| Steve Butler Dental Ceramics Limited | Manufacturing | 2003 |
| Steve Gilbert Building Services Limited | Construction | 2007 |
| Steven Allen Limited | Wholesale & retail | 2009 |
| Stevenage Charcoal Grill Ltd | Hospitality | 2016 |
| Stewart Marine & Trading Company Limited | Wholesale & retail | 2003 |
| Stick Around Productions Limited | Information & communication | 2016 |
| Stigwhips Ltd | Administrative & support | 2026 |
| Stile Fencing & Construction Limited | Manufacturing | 2001 |
| Stile Investments Limited | Real estate | 2025 |
| Stilton Butchers UK Ltd | Wholesale & retail | 2022 |
| Stilton Butchers Wholesale UK Ltd | Wholesale & retail | 2024 |
| Stilton Community Association CIC | Information & communication | 2021 |
| Stimpson Plumbing Services Limited | Construction | 2010 |
| Stinders Construction Ltd | Construction | 2018 |
| Stinders Developments Ltd | Construction | 2021 |
| Stindersandco Ltd | Construction | 2014 |
| Stirah Ltd | Manufacturing | 2019 |
| Stirling Advisory Limited | Information & communication | 2013 |
| Stitch Tailoring Limited | Wholesale & retail | 2014 |
| Stitches 2 Impress Limited | Manufacturing | 2002 |
| STK Offshore Limited | Manufacturing | 2013 |
| STK Trans Ltd | Transport & logistics | 2026 |
| Stmcb Limited | Information & communication | 2010 |
| STO Cazz Limited | Other services | 2025 |
| Stockwood Holmes Limited | Hospitality | 2026 |
| Stoica Best Builders Ltd | Construction | 2026 |
| Stokes & SON (Bricklaying) Limited | Construction | 2023 |
| Stokesay Road Residents Company Limited | Households | 2001 |
| Stolen Land Ltd | Wholesale & retail | 2025 |
| Stone & Masonry Repairs Ltd | Construction | 2024 |
| Stone ASH Facilities and Landscape Services Ltd | Administrative & support | 2025 |
| Stone Investments (UK) Ltd | Real estate | 2012 |
| Stone Polishing Ltd | Mining & quarrying | 2024 |
| Stone Town Property Management Ltd | Households | 2025 |
| Stonecheck Public Limited Company | Real estate | 1996 |
| Stonegate GAS Ltd | Construction | 2022 |
| Stonehart Properties Limited | Real estate | 2022 |
| Stonehaven Medical Limited | Information & communication | 2025 |
| Stonehaven Resources Ltd | Professional & scientific | 2014 |
| Stonehouse Accountancy Limited | Extraterritorial | 2022 |
| Stonehouse Accountants Limited | Extraterritorial | 2022 |
| Stones by MO Ltd | Wholesale & retail | 2025 |
| Stonewall Jackson Limited | | 1980 |
| Stonewater Trade Ltd | Wholesale & retail | 2018 |
| Stoney Studio Ltd | Information & communication | 2019 |
| Stop & Shop (Peterborough) Ltd | Wholesale & retail | 2019 |
| Stop and Shop Convenience Ltd | Wholesale & retail | 2020 |
| Storefrnt Ltd | Wholesale & retail | 2025 |
| Storelet Ltd | Wholesale & retail | 2022 |
| Storeright (UK) Limited | Real estate | 1988 |
| Storestride Limited | Wholesale & retail | 2025 |
| Storm Brewin Sales Ltd | Wholesale & retail | 2023 |
| Storm Whale Holdings Limited | Financial services | 2021 |
| Storry & Irvine Ltd | Construction | 2013 |
| Stoun Alazon Ltd | Wholesale & retail | 2023 |
| Stowe Farm Management Limited | Households | 2003 |
| STR8 Ltd | Wholesale & retail | 2012 |
| Stradbroke Holdings Limited | Other services | 2021 |
| Strahan Electrical Contractors Limited | Construction | 2018 |
| Strategic Mantra Ltd | Administrative & support | 2026 |
| Stratence Limited | Information & communication | 2025 |
| Stratfinance Solutions Ltd | Professional & scientific | 2024 |
| Stratton & Coleman Holdings Ltd | Financial services | 2018 |
| Stratton Investment Group Ltd | Real estate | 2022 |
| Stratton Oakmont Trade Ltd | Administrative & support | 2015 |
| Straw Professionals Ltd | Professional & scientific | 2022 |
| Streamline IT Solutions Ltd | Information & communication | 2018 |
| Street Arts Hire Ltd | Arts & recreation | 2018 |
| Street Cars (Cambs) Ltd | Transport & logistics | 2020 |
| Streetwise Enterprises LLP | | 2009 |
| Strellis Property Ltd | Real estate | 2025 |
| Strensall Residents Company Limited | Households | 2002 |
| Stretton Pre-School | Education | 2008 |
| Strike One Media Limited | Administrative & support | 2013 |
| Stringer Appliances Limited | Manufacturing | 2014 |
| Stringwise Limited | Education | 1995 |
| Stroman Ltd | Transport & logistics | 2017 |
| Stronghold Peterborough Ltd | Arts & recreation | 2026 |
| Structa Base Limited | Manufacturing | 2026 |
| Strudwick & Co Limited | Construction | 2013 |
| Student Boost Limited | Professional & scientific | 2023 |
| Studex Manufacturing of UK Limited | Wholesale & retail | 1982 |
| Studio 6 Peterborough Ltd | Other services | 2023 |
| Studio Bust Limited | Arts & recreation | 2023 |
| Studio Gòkè Limited | Other services | 2021 |
| Studio Hair 74 (Dogsthorpe) Limited | Other services | 2019 |
| Studio One (Peterborough) Limited | Other services | 2003 |
| Stuff Shrink Ltd | Other services | 2026 |
| Stumps Limited | Real estate | 2021 |