| Svtr Ltd | Wholesale & retail | 2026 |
| SW Byproducts Ltd | Manufacturing | 2024 |
| SW Piping Services Ltd | Professional & scientific | 2025 |
| Swagger Sports and Wine Limited | Hospitality | 2022 |
| Swale Engineering Limited | Construction | 2015 |
| Swan Care Home Ltd | Health & social care | 2021 |
| Swan House Grimsby Ltd | Construction | 2020 |
| Swanwick Dental Practice Limited | Health & social care | 2006 |
| Sweeney's of Scartho Ltd | Other services | 2023 |
| Sweet AS a NUT Ltd | Hospitality | 2025 |
| Swift Decorators Limited | Construction | 2006 |
| Swift Fulfilment Ltd | Transport & logistics | 2026 |
| Swimrite Supplies Limited | Extraterritorial | 1992 |
| Swinkels Trading Ltd | Wholesale & retail | 2015 |
| Switch on the Light Limited | Education | 2015 |
| Switched on (SW) Ltd | Construction | 2016 |
| Switched Positive Electrical Contractors Limited | Construction | 2014 |
| SWM Mepc Ltd | Professional & scientific | 2025 |
| Swopped Ltd | Wholesale & retail | 2018 |
| Syer Energy Consultants Limited | Other services | 2025 |
| Sykes Roofing Limited | Construction | 2001 |
| Synapse Electrical Services Limited | Manufacturing | 2017 |
| Syncly Solutions Ltd | Information & communication | 2024 |
| Synergy (Grimsby) Community Interest Company | Education | 2010 |
| Synergy Green Ltd | Construction | 2019 |
| Synerjy Holdings Limited | Financial services | 2023 |
| Synerjy Limited | Manufacturing | 2000 |
| Systemic Coaching Ltd | Administrative & support | 2018 |
| Szkarm Limited | Manufacturing | 2025 |
| SZR Holdings Ltd | Administrative & support | 2019 |
| T & M Print Management Ltd | Information & communication | 2016 |
| T & R FOX Food Ltd | Hospitality | 2025 |
| T & R K.Arms LA4 Ltd | Hospitality | 2025 |
| T & R Main PH Ltd | Construction | 2019 |
| T & R Masons LS26 Ltd | Hospitality | 2025 |
| T & R Pendle LA1 Ltd | Hospitality | 2025 |
| T & R PUB Management Ltd | Hospitality | 2019 |
| T & R Pubs Yorkshire Ltd | Hospitality | 2021 |
| T & R Q.Arms WF2 Ltd | Hospitality | 2025 |
| T & R T.Tred S75 Ltd | Hospitality | 2023 |
| T & R Temp Ltd | Hospitality | 2025 |
| T & R the Swan Ltd | Hospitality | 2018 |
| T & R Wheatley DN2 Ltd | Hospitality | 2024 |
| T a Renovations Ltd | Construction | 2021 |
| T Allenby Developments Ltd. | Construction | 2024 |
| T B Bar Ltd | Hospitality | 2026 |
| T Betts Fish Limited | Wholesale & retail | 2013 |
| T Braithwaite Limited | Professional & scientific | 2020 |
| T C Ventures Limited | Other services | 2025 |
| T Cleaning Ltd | Administrative & support | 2015 |
| T E C Engineering (Grimsby) Limited | Construction | 2019 |
| T J Car Repairs Ltd | Wholesale & retail | 2026 |
| T J Dean Limited | Construction | 2018 |
| T K K One Co. Ltd | Hospitality | 2024 |
| T K Wood Engineering Limited | Professional & scientific | 2022 |
| T R Property Limited | Real estate | 2015 |
| T R Property Two Limited | Construction | 2021 |
| T S W Construction Limited | Construction | 2019 |
| T&R Bay Horse HD3 Ltd | Hospitality | 2024 |
| T&R Crown HD1 Ltd | Hospitality | 2024 |
| T&R Dearnesman at Wath Ltd | Hospitality | 2023 |
| T&R FOX WF2 Ltd | Hospitality | 2026 |
| T&R Holding Company Ltd | Hospitality | 2022 |
| T&R Joker Bramley Ltd | Hospitality | 2024 |
| T&R Nailmakers S8 Ltd | Hospitality | 2024 |
| T&R Oldfield Hotel at Leeds Ltd | Hospitality | 2022 |
| T&R Pack Horse S71 Ltd | Hospitality | 2023 |
| T&R PUB Holding Co Ltd | Hospitality | 2020 |
| T&R Sheppey at Maltby Ltd | Hospitality | 2022 |
| T&R the Fleece at Pudsey Ltd | Hospitality | 2021 |
| T&R Victoria S70 Ltd | Hospitality | 2026 |
| T&R Wheatsheaf WF3 Ltd | Hospitality | 2024 |
| T&S Complete Property Services Ltd | Construction | 2026 |
| T-Dal MF Holdings Limited | Financial services | 2025 |
| T-Mec Productions Limited | Arts & recreation | 2015 |
| T-Sport Specialists Ltd | Wholesale & retail | 2025 |
| T. Connolly Flooring Ltd | Construction | 2015 |
| T. Dixon & Sons (Plumbers) Limited | Construction | 1960 |
| T. I. Trading Limited | Wholesale & retail | 2008 |
| T. Marris Carpets Limited | Wholesale & retail | 2002 |
| T.A.G Roofing & Cladding Ltd | Construction | 2025 |
| T.A.S. (Property Leasing) Limited | Construction | 1978 |
| T.B. (Properties) Limited | Real estate | 1964 |
| T.K. Garnett Engineering Limited | Manufacturing | 1995 |
| T.K.Childs Limited | Real estate | 1941 |
| T.M Flooring Limited | Construction | 2014 |
| T.M. Appleyard Limited | Households | 2002 |
| T.M. Services Holdings Limited | Financial services | 2019 |
| T2 Engineering Ltd | Professional & scientific | 2021 |
| T212 Academy Ltd | Information & communication | 2026 |
| T4 Engineering Solutions Ltd | Manufacturing | 2020 |
| TA2 Trading Ltd | Wholesale & retail | 2008 |
| Tab-It Recruitment Solutions Ltd | Administrative & support | 2016 |
| Tabone Limited | Administrative & support | 2012 |
| Tach-It (UK) Limited | Wholesale & retail | 2006 |
| TAG Rope Access Limited | Construction | 2020 |
| Taho 73 Ltd | Transport & logistics | 2018 |
| Tailor Made Tuition Grimsby Limited | Education | 2026 |
| Tailored Highway Support Ltd | Professional & scientific | 2018 |
| Tainted Lips Limited | Wholesale & retail | 2013 |