| Savvy Technologies Limited | Professional & scientific | 2016 |
| School Transport Management Limited | Professional & scientific | 2011 |
| Scotts Court Management Company Limited | Households | 1998 |
| SE Marine Limited | Administrative & support | 2010 |
| Searle Plumbing & Heating Services Ltd. | Construction | 2025 |
| Sedge Works Ltd | Manufacturing | 2024 |
| Select Country Inns Ltd | Hospitality | 1982 |
| Semarine Yacht Management Limited | Professional & scientific | 2011 |
| Serenity Residents Limited | Households | 2012 |
| Settled Stays Ltd | Real estate | 2025 |
| Settlement Agreement Advice Limited | Information & communication | 2024 |
| Settlement Agreement Lawyers Ltd | Professional & scientific | 2021 |
| Settlement Agreement Ltd | Information & communication | 2023 |
| Settlement Agreement Services Ltd | Information & communication | 2024 |
| Seven Richmond Park Avenue Limited | Real estate | 2008 |
| SG & GMJ Ltd | Hospitality | 2014 |
| SG Manufacturing Ltd | Manufacturing | 2007 |
| SGL Electrical Contractors Ltd. | Construction | 2001 |
| SGL Electrical Solutions Ltd | Extraterritorial | 2018 |
| SGL Interiors Ltd | Extraterritorial | 2018 |
| SGL6(1) Limited | Real estate | 2018 |
| SGL6(2) Limited | Real estate | 2017 |
| SGL6(3) Limited | Real estate | 2024 |
| SGL7 Ltd | Hospitality | 2016 |
| SGS Carpentry and Building Ltd | Construction | 2023 |
| Shafted the Movie Limited | Information & communication | 2012 |
| Sherwood Forestry Limited | Agriculture & fishing | 2010 |
| SHL Props Ltd | Information & communication | 2019 |
| SHW2025 LLP | | 2025 |
| Siggers Medical Limited | Health & social care | 2012 |
| Silke IT Consulting UK Limited | Information & communication | 2018 |
| Silver Cloud Lifestyles Limited | Wholesale & retail | 2014 |
| Silverdale Engineering Ltd | Professional & scientific | 2019 |
| SIM Meds Ltd | Manufacturing | 2026 |
| SIM Supermarket Ltd | Administrative & support | 2025 |
| Sketch Creative Consultancy Limited | Administrative & support | 2012 |
| Skypointe Limited | Professional & scientific | 2016 |
| Smart Drainz Ltd | Construction | 2020 |
| Smart Sandbox Limited | Information & communication | 2017 |
| SN Geophysics Ltd | Professional & scientific | 2019 |
| Social Power Limited | Administrative & support | 2014 |
| Solent Fort (Management) Limited | Real estate | 1977 |
| Sommio Ltd | Wholesale & retail | 2018 |
| Sophie's Nails Limited | Other services | 2022 |
| Soulful Wisdom Academy Ltd | Education | 2021 |
| Source Safety Ltd | Construction | 2025 |
| Source to Scent Ltd | Manufacturing | 2026 |
| South Coast JET SKI Ltd | Arts & recreation | 2021 |
| South Coast Motorhome and Caravan Services Ltd | Wholesale & retail | 2026 |
| Southern Waterscapes Ltd. | Agriculture & fishing | 2016 |
| Southwinds Court Limited | Households | 2005 |
| Spark Fundraising Consultancy Ltd | Professional & scientific | 2013 |
| SPN New Forest Ltd | Professional & scientific | 2014 |
| Spring Gardens (Alresford) Residents Association Limited | Households | 2012 |
| SRM World Limited | Professional & scientific | 2009 |
| ST George's Financial Services Ltd | Professional & scientific | 2009 |
| ST Swithin's Place Management Company Limited | Households | 2009 |
| Stable Gardens Ltd | Construction | 2019 |
| Stay Special Limited | Construction | 2026 |
| Steam & Vintage Fest Limited | Other services | 2023 |
| Steele Rose & Co (Storage) Limited | Professional & scientific | 1998 |
| Stephen Lees Original Contemporary Art Limited | Wholesale & retail | 2006 |
| Sterling Global Marine Limited | Professional & scientific | 2015 |
| Steve Mccallum Creative Ltd | Professional & scientific | 2017 |
| Stopher TV Limited | Information & communication | 2025 |
| Strativa Financial Planning Limited | Other services | 2020 |
| Street Farmhouse Holdings Limited | Hospitality | 2020 |
| Studio 1119 Limited | Real estate | 2006 |
| Stycross Limited | Extraterritorial | 2002 |
| Succinct Limited | Information & communication | 2002 |
| Succinct Technology Holdings Limited | Construction | 2016 |
| Succinct Technology Services Limited | Information & communication | 2011 |
| Sun Studio (Ringwood) Ltd | Other services | 2007 |
| Superboon Shipping Limited | Transport & logistics | 2025 |
| Surrey Pool Maintenance Limited | Other services | 2011 |
| Sustainability Solutions Academy Ltd | Education | 2025 |
| SW Voice and Data Limited | Information & communication | 2017 |
| Swaledale and Wensleydale Environmental Farmers Ltd | Agriculture & fishing | 2024 |
| Swan Access Systems Ltd | Wholesale & retail | 2017 |
| Tahu Ventures Ltd | Professional & scientific | 2021 |
| Talaria Consultancy & Training Services Limited | Professional & scientific | 2025 |
| Talent Seeker Ltd | Administrative & support | 2015 |
| Talentum Global Ltd | Administrative & support | 2020 |
| Talis International Ltd | Real estate | 2020 |
| Tampen & Tampen Limited | Wholesale & retail | 1998 |
| Taylor Transport Solutions Ltd | Transport & logistics | 2019 |
| TC Seymour Plumbing & Heating Limited | Construction | 2006 |
| Team Incredible Ltd. | Administrative & support | 2010 |
| TF Film Productions Limited | Information & communication | 2015 |
| TFW (UK) Limited | Hospitality | 2010 |
| THE Boscombe Point Management Company Limited | Households | 2001 |
| THE Botanical Cleaning Co Ltd | Administrative & support | 2024 |
| THE Burgate School and Sixth Form | Education | 2011 |
| THE Carers' Legal Centre Ltd | Professional & scientific | 2009 |
| THE Clive Barker Archive LLP | | 2017 |
| THE Cocktail Party in a Box Ltd | Extraterritorial | 2016 |
| THE Courtyard (Parkstone) Management Co Limited | Extraterritorial | 1988 |
| THE Crossways Freehold Ltd | Households | 2017 |
| THE Dorset Sea Bass Company Ltd | Agriculture & fishing | 2024 |
| THE Drain Experts Southern Limited | Water & waste | 2016 |