| Sweep Scrub Limited | Other services | 2023 |
| Sweepalicious Limited | Administrative & support | 2023 |
| Sweet Oak Joiners Limited | Construction | 2014 |
| Sweet Tooth (Halifax) Limited | Wholesale & retail | 2020 |
| Sweet Tooth Desserts Ltd | Hospitality | 2024 |
| Sweet-Rose Salon Limited | Other services | 2018 |
| Sweetestsaffron Limited | Wholesale & retail | 2005 |
| Sweets 4 Humanity Ltd | Wholesale & retail | 2023 |
| SWH Engineering Limited | Construction | 2023 |
| Swift Prestige Ltd | Transport & logistics | 2018 |
| Swift Removals Ltd | Transport & logistics | 2015 |
| Swiftcart UK Pro Ltd | Wholesale & retail | 2025 |
| Swiftshift Payroll Ltd | Professional & scientific | 2024 |
| Switch Marketing Limited | Professional & scientific | 2010 |
| Switch That Technologies Limited | Information & communication | 2013 |
| Switchback Holdings Limited | Extraterritorial | 2024 |
| Switish Limited | Wholesale & retail | 2011 |
| Swoon Love Limited | Professional & scientific | 2020 |
| Swordbeach Investments Limited | Real estate | 2013 |
| Swormco Ltd | Financial services | 2023 |
| SYE Services Limited | Professional & scientific | 2013 |
| Symport Ltd | Health & social care | 2024 |
| Synchronised Care Limited | Health & social care | 2016 |
| Synderford Ltd | Information & communication | 2019 |
| Synergistic Consultancy Ltd | Professional & scientific | 2007 |
| Synergy Drive Ltd | Wholesale & retail | 2025 |
| Synergy Housing Solutions Limited | Construction | 2002 |
| Synflux Ltd | Information & communication | 2026 |
| Systec Online Limited | Wholesale & retail | 2014 |
| SZ Healthcare Ltd | Health & social care | 2024 |
| SZ Home Group Ltd | Real estate | 2025 |
| SZ Speedy Couriers Ltd | Transport & logistics | 2026 |
| SZA Claims and Hire Ltd | Administrative & support | 2023 |
| Szumotalski Services Ltd | Manufacturing | 2019 |
| T & J Properties (Halifax) Ltd | Real estate | 2025 |
| T & M Medics Ltd | Health & social care | 2022 |
| T & M Steel Buildings Ltd | Construction | 2012 |
| T & N Hogarth Properties Limited | Construction | 2005 |
| T M Home Limited | Professional & scientific | 2018 |
| T P Key Ltd | Professional & scientific | 2026 |
| T T Environmental Limited | Professional & scientific | 2001 |
| T W Alliance Property Management Limited | Real estate | 2024 |
| T&S Private Hire Ltd | Transport & logistics | 2024 |
| T. J. Walsh Limited | Administrative & support | 2000 |
| T.A.T.S & Sons Limited | Transport & logistics | 2018 |
| T.H.Holroyd Limited | Construction | 1957 |
| T.S.G. Associates LLP | | 2008 |
| T.S.G. Pellon Ltd | Administrative & support | 2001 |
| T94 Nails Spa Ltd | Other services | 2025 |
| TA Global Consulting Limited | Professional & scientific | 2026 |
| TA123 Ltd | Other services | 2024 |
| Tabor Wheels Limited | Arts & recreation | 2011 |
| Tackle Apparel Ltd | Wholesale & retail | 2025 |
| Tacopper Electrical Ltd | Wholesale & retail | 2020 |
| Tact Products Ltd | Hospitality | 2017 |
| Tadsul Limited | Financial services | 2025 |
| TAG Safety Ltd | Administrative & support | 2022 |
| TAG Tool Hire Holdings Ltd | Real estate | 2023 |
| TAG Tool Hire Ltd | Administrative & support | 2009 |
| Tagattach Limited | Administrative & support | 2011 |
| Tahleel Optics Ltd | Health & social care | 2023 |
| Tahseen FM Ltd | Real estate | 2025 |
| Tailback Terminals Ltd | Wholesale & retail | 2024 |
| Tailor Mackintosh Trading Ltd | Wholesale & retail | 2023 |
| Tailor Your Care Limited | Health & social care | 2022 |
| Talbot Enterprises Limited | Professional & scientific | 2023 |
| Talent Picture Limited | Professional & scientific | 2015 |
| Talent Source Recruitment Limited | Administrative & support | 2021 |
| Talisman Security Group Ltd | Administrative & support | 2022 |
| Tallis Windows 1 Ltd | Construction | 2024 |
| Talon Securities Ltd | Administrative & support | 2017 |
| Tamrac Properties Limited | Real estate | 2022 |
| Tamz Group Ltd | Financial services | 2025 |
| Tanha Musafir Ltd | Administrative & support | 2023 |
| Tanoz Ltd | Real estate | 2025 |
| Tanzeel Ahmad Ltd | Wholesale & retail | 2025 |
| Tapure UK Ltd | Wholesale & retail | 2021 |
| TARABITHIA007 Limited | Health & social care | 2022 |
| Taskwear Ltd | Wholesale & retail | 2025 |
| Taste of China HX3 Ltd | Hospitality | 2022 |
| Tasty Bites Halifax Ltd | Hospitality | 2025 |
| Tasty Bites HFX Ltd | Hospitality | 2024 |
| TAT Designs Ltd | Wholesale & retail | 2015 |
| TAT Properties Ltd | Hospitality | 2019 |
| Taut Ltd | Wholesale & retail | 2012 |
| Tax Landlord Ltd | Professional & scientific | 2016 |
| Taxi Flex Rentals Ltd | Administrative & support | 2022 |
| TAY Stone & Building Services Limited | Extraterritorial | 2009 |
| Taylor Armitage Estates Ltd | Construction | 2026 |
| Taylor Art Stone Limited | Manufacturing | 2010 |
| Taylor Edwards Estates Ltd | Real estate | 2020 |
| Taylor Edwards Property Services Ltd | Construction | 2018 |
| Taylor GEO Environmental Limited | Administrative & support | 2014 |
| Taylor Made Safety Ltd | Wholesale & retail | 2010 |
| Taylorb Ltd | Households | 2024 |
| Taylored Elegance Ltd | Other services | 2011 |
| Taylors Technology Limited | Information & communication | 2023 |
| Tayy Limited | Real estate | 2024 |
| Tazs Autocare Ltd | Wholesale & retail | 2026 |
| TB Services (Halifax) Ltd | Construction | 2024 |