| Steve Poole Plant Hire Limited | Construction | 1995 |
| Steven Hallworth Ltd | Arts & recreation | 2025 |
| Steve’S Services Limited | Wholesale & retail | 2025 |
| Stickney Chase Ltd | Construction | 2022 |
| Stickney Chase Management Company Limited | Administrative & support | 2024 |
| Stobart Electrical Ltd | Construction | 2022 |
| Stoneman Storey Limited | Professional & scientific | 1999 |
| Stradbrook Farms Ltd | Agriculture & fishing | 2025 |
| Straightahead House Limited | Real estate | 2022 |
| Straightahead UK Limited | Professional & scientific | 2009 |
| Stranger Tale Films Ltd | Information & communication | 2014 |
| Strat-Hub Consulting Limited | Professional & scientific | 2025 |
| Stride Management Consultancy Limited | Professional & scientific | 2020 |
| Stuart Vickers Groundworks Ltd | Construction | 2024 |
| Studio Evelyn Ltd | Information & communication | 2025 |
| Succurro (GB) Limited | Manufacturing | 2010 |
| Summers House Ltd | Real estate | 2026 |
| Summet Homes Limited | Construction | 2019 |
| Suzi Pizza Ltd | Hospitality | 2025 |
| SW Enterprises (Sleaford) Limited | Construction | 2023 |
| Swinghubevents Ltd | Administrative & support | 2026 |
| Switch Telecommunications Limited | Wholesale & retail | 2025 |
| Sycamore 1969 Limited | Extraterritorial | 2013 |
| T a S Guest Ltd | Professional & scientific | 2025 |
| T W Automotive Engineering Ltd | Professional & scientific | 2024 |
| T W B Engineering Limited | Professional & scientific | 2016 |
| T.D Patios Drives and Ground Works Ltd | Construction | 2019 |
| T3UK Ltd | Professional & scientific | 2009 |
| T4SUK Ltd | Transport & logistics | 2025 |
| T7 Global Ltd | Information & communication | 2025 |
| Taas Ltd | Manufacturing | 2009 |
| Take Two Marketing Ltd | Arts & recreation | 2025 |
| Talube Limited | Wholesale & retail | 2024 |
| Taylor and Taylor Homes Ltd | Households | 2025 |
| Taylor&Wall Ltd | Administrative & support | 2019 |
| Taylor-Mayers Ltd | Professional & scientific | 2007 |
| Taylormayers Estates Ltd | Administrative & support | 2017 |
| Taylors Fine Dining Limited | Hospitality | 2018 |
| Tayton - Joinery and Landscaping Ltd | Construction | 2022 |
| Tdmz Ltd | Transport & logistics | 2016 |
| Tea House in the Woods Limited | Hospitality | 2022 |
| Tea House in the Woods Property Ltd | Real estate | 2022 |
| Team Stacey Ltd | Arts & recreation | 2023 |
| Techprint Services Limited | Wholesale & retail | 1993 |
| Teiro Limited | Hospitality | 2017 |
| Teja Enterprises Ltd | Professional & scientific | 2024 |
| Teleflora UK Holdings Ltd. | Professional & scientific | 1997 |
| Temporarypodsolutions Ltd | Administrative & support | 2025 |
| Teratek Limited | Information & communication | 2007 |
| Terrier Developments Limited | Extraterritorial | 2016 |
| TGR Agricultural Services Ltd | Agriculture & fishing | 2024 |
| TGR Asset Holdings Ltd | Agriculture & fishing | 2024 |
| Thacker’S Building Services Ltd | Construction | 2024 |
| Thackray Holdings Limited | Financial services | 2024 |
| Thain Management Solutions Limited | Professional & scientific | 2012 |
| That Bridal Glow Ltd | Other services | 2024 |
| THE 3D Printing Shed Ltd | Manufacturing | 2025 |
| THE Agra Spices Ltd | Hospitality | 2016 |
| THE Art of Selling Limited | Real estate | 2018 |
| THE Bridal Club Ltd | Wholesale & retail | 2026 |
| THE British Wheel of Yoga Limited | Education | 2009 |
| THE Britton Medical Practice Ltd | Health & social care | 2019 |
| THE Burger Lounge Ltd | Hospitality | 2019 |
| THE Bustard Inn Limited | Hospitality | 2018 |
| THE Cake and Truffle Factory Limited | Wholesale & retail | 2022 |
| THE Carre Arms Hotel Limited | Hospitality | 2016 |
| THE Chestnuts Retirement Home LLP | | 2010 |
| THE Chestnuts Retirement Ltd | Health & social care | 2026 |
| THE Cleaning Company (Newark) Ltd | Administrative & support | 2023 |
| THE Confident Paramedic LLP | | 2025 |
| THE Crew Academy Limited | Education | 2012 |
| THE Dark Spark Electrical & Property Services Ltd | Manufacturing | 2025 |
| THE Dressing Room Boutique Ltd | Wholesale & retail | 2013 |
| THE Energy Specialists 2020 Ltd | Administrative & support | 2022 |
| THE Finch Ewerby Ltd | Hospitality | 2020 |
| THE Fish and More Food Company (Langtoft) Limited | Wholesale & retail | 2011 |
| THE Fish and More Food Company Limited | Wholesale & retail | 2009 |
| THE Food Heroes Foods Limited | Wholesale & retail | 2022 |
| THE Food Heroes Limited | Administrative & support | 2018 |
| THE Food Heroes Marketing Limited | Administrative & support | 2019 |
| THE Foundry Vehicle Sales Ltd | Wholesale & retail | 2022 |
| THE Golfers' Lounge Ltd | Arts & recreation | 2025 |
| THE Greenfinch Close Management Company Limited | Households | 2022 |
| THE Horseshoes Public House Limited | Hospitality | 2025 |
| THE Hutch Shop Limited | Wholesale & retail | 2015 |
| THE Inkpot CIC | Agriculture & fishing | 2023 |
| THE JDB Investment Company Limited | Financial services | 2026 |
| THE Junior Sports Programme Trust Limited | Arts & recreation | 2008 |
| THE Lincolnshire Wellness Co. Ltd | Other services | 2025 |
| THE Littlest Things Limited | Wholesale & retail | 2010 |
| THE Melton Mowbray Pork PIE Association Ltd | Other services | 2006 |
| THE MX-5 Spot Ltd | Wholesale & retail | 2022 |
| THE Natural Cat Food Co. Ltd. | Manufacturing | 2008 |
| THE Natural Dog Food Company Limited | Manufacturing | 2007 |
| THE New Chapel Limited | Other services | 2021 |
| THE Newel Post Group Limited | Financial services | 2018 |
| THE Newmarket Rocking Horse Company Limited | Manufacturing | 2013 |
| THE Oak Heckington Ltd | Hospitality | 2020 |
| THE Oasis Cafe Bar Ltd | Hospitality | 2023 |
| THE Old Butchers Limited | Professional & scientific | 2014 |