| Startech Designs Limited | Construction | 2022 |
| Stas Holdings Limited | Financial services | 2017 |
| State 4 Restaurants Limited | Hospitality | 2015 |
| Statera Forge Limited | Information & communication | 2026 |
| Statham Collections Limited | Professional & scientific | 2025 |
| Station Avenue (Ewell) Management Company Limited | Households | 1994 |
| Station Garage (Belper) Limited | Wholesale & retail | 2009 |
| Station House Childrens Day Nursery Limited | Education | 2025 |
| Station Street Lang Mill Management Ltd | Construction | 2025 |
| Station Vehicle Services Limited | Wholesale & retail | 2023 |
| Staton Young (Anglesey) Limited | Real estate | 2014 |
| Staton Young (Commercial) Limited | Real estate | 2014 |
| Staton Young (Development) Limited | Extraterritorial | 2014 |
| Staton Young (Litchurch) Limited | Real estate | 2016 |
| Staton Young (Mayfair) Limited | Real estate | 2022 |
| Staton Young (Northgate) Limited | Real estate | 2020 |
| Staton Young (Residential) Limited | Real estate | 2010 |
| Staton Young (Shipley) Ltd | Real estate | 2023 |
| Staton Young Holdings Limited | Professional & scientific | 2012 |
| Staton Young Investments Limited | Extraterritorial | 2020 |
| Staton Young M&R Limited | Extraterritorial | 2022 |
| Status Social Limited | Professional & scientific | 2012 |
| Statusexpect Services Limited | Real estate | 1993 |
| Stay on the Ball Coaching Ltd | Education | 2017 |
| Stay on the Ball Properties Limited | Arts & recreation | 2025 |
| STAY11MILLSTREET Limited | Hospitality | 2019 |
| Staybodia Ltd | Hospitality | 2026 |
| Staykool Ltd | Wholesale & retail | 2023 |
| STC Consulting Group Limited | Professional & scientific | 2022 |
| Stead Solutions Limited | Information & communication | 2015 |
| Steadfast Wellbeing Services Ltd | Health & social care | 2026 |
| Steadwall Properties Ltd | Real estate | 2014 |
| Steady Sports Limited | Arts & recreation | 2022 |
| Steadytides Ltd | Wholesale & retail | 2024 |
| Stedfast Electrical Controls Limited | Extraterritorial | 1992 |
| Steeden Properties Ltd | Real estate | 2024 |
| Steelfixing Services Limited | Construction | 2011 |
| Steeple View Management Limited | Households | 1994 |
| Steers Hotel Limited | Hospitality | 2003 |
| Stefan Joseph Designs Ltd | Arts & recreation | 2014 |
| Stela Stays Ltd | Hospitality | 2023 |
| Stella Automotive Ltd | Wholesale & retail | 2024 |
| Stella Property Ltd | Real estate | 2018 |
| Stellar Mayan Limited | Health & social care | 2016 |
| Stem Venturi Ltd | Education | 2020 |
| Stenad Group Ltd | Construction | 2026 |
| Stencon Ltd | Professional & scientific | 2017 |
| Stenson Auto Mods Limited | Wholesale & retail | 2025 |
| Stenson Healthcare Limited | Wholesale & retail | 2010 |
| Stenson Leisure Limited | Real estate | 2025 |
| Stenson Stores Limited | Wholesale & retail | 2003 |
| Stenson Valeting Centre Limited | Other services | 2018 |
| Stensonfields Car Sales Limited | Wholesale & retail | 2018 |
| Stephen Fletcher Architects Ltd | Professional & scientific | 2001 |
| Stephenson Engineering Limited | Professional & scientific | 2022 |
| Stephenson Gardens Management Company Limited | Real estate | 2021 |
| Stephenson Imports Ltd | Agriculture & fishing | 2025 |
| Stepping Lane Residents Association Limited | Real estate | 1990 |
| Sterling and Stone Property Group Ltd | Real estate | 2025 |
| Sterling Bliss Ltd | Real estate | 2025 |
| Sterling Clean Group Ltd | Administrative & support | 2026 |
| Sterling Crown Trading Ltd | Wholesale & retail | 2026 |
| Sterling Essentials Ltd | Wholesale & retail | 2025 |
| Sterling Personnel Ltd | Administrative & support | 2022 |
| Sterling Windows Plus Limited | Construction | 2025 |
| Steve Binch Property Limited | Real estate | 2010 |
| Steve Holmes Couriers Limited | Transport & logistics | 2018 |
| Steve Musk Engineering Limited | Professional & scientific | 2015 |
| Steve Simpson Limited | Construction | 2014 |
| Steve Smith Interim and Consultancy Ltd | Professional & scientific | 2024 |
| Steve Tarr Sports Massage Ltd | Health & social care | 2015 |
| Steve Trower Plumbing & Heating Limited | Construction | 2003 |
| Steve Wests Consulting Services Ltd | Information & communication | 2019 |
| Steve Wild Sporting Limited | Arts & recreation | 2017 |
| Steven Butler Limited | Professional & scientific | 2013 |
| Steven Gerrard Promotions Limited | Arts & recreation | 1999 |
| Steven Stephens Enterprise Ltd | Hospitality | 2026 |
| Stevenson Building Services Limited | Construction | 2022 |
| Stewart Bailey Limited | Wholesale & retail | 2026 |
| Stewart Inc Limited | Wholesale & retail | 2025 |
| Stewarts & Co Limited | Real estate | 2013 |
| STH Mechanical Ltd | Construction | 2019 |
| Stha's Ltd | Health & social care | 2022 |
| Stila Ltd | Hospitality | 2018 |
| Stile Cottage Building Solutions Limited | Construction | 2017 |
| Stiles Group Ltd | Financial services | 2025 |
| Stillstrom UK Limited | Transport & logistics | 2026 |
| Stimoco Ltd | Households | 2023 |
| Stimulating Minds Limited | Professional & scientific | 2008 |
| Stirling Transport Consulting Ltd | Professional & scientific | 2022 |
| STJ Roofing Limited | Construction | 2018 |
| STO Global Ltd | Professional & scientific | 2023 |
| Stock & Metal Limited | Wholesale & retail | 1991 |
| Stock-Turn Consulting Ltd | Wholesale & retail | 2024 |
| Stockbrook Homes Ltd | Real estate | 2020 |
| Stocker Engineering Limited | Professional & scientific | 2023 |
| Stockstore Ltd | Wholesale & retail | 2025 |
| Stocs Global Holdings Limited | Financial services | 2024 |
| Stohos Engineering Ltd | Professional & scientific | 2025 |
| Stohos Group Ltd | Professional & scientific | 2025 |