| THE Penhale Society Limited | Extraterritorial | 1960 |
| THE Performance Hub Arts Limited | Arts & recreation | 2013 |
| THE Petal Parlour Ltd | Wholesale & retail | 2025 |
| THE Phonez Lancaster Limited | Other services | 2024 |
| THE Picnic Box (Lakes) Limited | Hospitality | 2025 |
| THE Potteries (Lancaster) Management Company Limited | Households | 2015 |
| THE Promise Ring Co Limited | Manufacturing | 2022 |
| THE Quilted Sheep Limited | Wholesale & retail | 2010 |
| THE Rainbow's Nest Ltd | Real estate | 2025 |
| THE Redeemed Christian Church of GOD Latter Rain Parish | Other services | 2014 |
| THE Reset Partnership LLP | | 2023 |
| THE River Room Halton Ltd | Arts & recreation | 2023 |
| THE Role Play Village Limited | Health & social care | 2024 |
| THE Royal Hotel & Bar Ltd | Hospitality | 2016 |
| THE Royal Oak (Burton) Ltd | Hospitality | 2024 |
| THE Sea Films Limited | Information & communication | 2012 |
| THE Shared Value Business Ltd | Professional & scientific | 2019 |
| THE Smoke House Management Company Limited | Households | 1995 |
| THE Snug Micropub Limited | Hospitality | 2018 |
| THE Society for Experimental Biology | Professional & scientific | 1977 |
| THE Space @ Leigh Limited | Real estate | 2024 |
| THE Tara Project Lancaster C.I.C. | Health & social care | 2013 |
| THE Tiny Pony Parlour Ltd | Arts & recreation | 2025 |
| THE Together Consultancy Ltd | Professional & scientific | 2023 |
| THE Vault TCC Ltd | Wholesale & retail | 2022 |
| THE Village Store (Galgate) Limited | Wholesale & retail | 2002 |
| THE Web Clinic Limited | Information & communication | 2007 |
| THE Wedding Childcare Company Limited | Health & social care | 2023 |
| THE Wobbly Cobbler Limited | Hospitality | 2021 |
| THE Work Foundation Alliance Limited | Extraterritorial | 2011 |
| THE Yorkshire Dales Millennium Trust | Other services | 1996 |
| Theatre Dance Studios Limited | Arts & recreation | 2024 |
| Theatretrain Bury ST Edmunds LLP | | 2024 |
| Theatretrain Cambridge North Limited | Arts & recreation | 2024 |
| Theatretrain Exeter Limited | Arts & recreation | 2024 |
| Theatretrain Sudbury LLP | | 2024 |
| Thefureverfamily Ltd | Wholesale & retail | 2025 |
| Thesixthaxis Media Ltd | Information & communication | 2019 |
| Think Management UK Limited | Professional & scientific | 2018 |
| Third Sector Financial Services Limited | Professional & scientific | 2011 |
| Thirdant Marler Limited | Professional & scientific | 2008 |
| Thirteen Bakes Ltd | Manufacturing | 2025 |
| Thorncliffe Property Ltd | Real estate | 2020 |
| Thornthwaite Information Systems Limited | Information & communication | 2007 |
| Thornton Crane Services Limited | Construction | 2016 |
| Thornton Meadow Mushrooms Limited | Other services | 1986 |
| THOUGHTS247 Limited | Health & social care | 2016 |
| Three Swords IT Ltd | Information & communication | 2026 |
| Three Wheel GIN Company Ltd | Manufacturing | 2019 |
| Three&Six Ltd | Information & communication | 2018 |
| Threefold Properties Limited | Real estate | 2026 |
| Threshold Projects Ltd | Arts & recreation | 2011 |
| Thrifty Chef CIC | Hospitality | 2023 |
| Throstle Building Consultants Ltd | Construction | 2024 |
| Thrushgill Engineering Limited | Construction | 2019 |
| Thrushgill Fisheries Limited | Hospitality | 2016 |
| Thrushgill Renewable Energy Limited | Professional & scientific | 2016 |
| Thurnham Mews (Management) Company Limited | Households | 1991 |
| Tiam Tea Limited | Hospitality | 2021 |
| TIC Over Limited | Wholesale & retail | 2023 |
| Tickety BOO Safety Limited | Manufacturing | 2022 |
| Tier UP Plus Ltd | Information & communication | 2025 |
| Tierraviva AI Limited | Information & communication | 2023 |
| Tiffany Washing and Cleaning Ltd | Other services | 2022 |
| Tiki & the Blues Limited | Hospitality | 2025 |
| TIM Wheildon Heating Services Limited | Construction | 2009 |
| Time 4 Nursery LLP | | 2020 |
| Timeless Roofing Ltd | Construction | 2024 |
| Tiny Treasures Nursery and Pre-School Limited | Education | 2018 |
| Tipperthwaite Services Limited | Professional & scientific | 2024 |
| Tipple Cocktails Limited | Hospitality | 2016 |
| Tipsy Daisy Limited | Hospitality | 2025 |
| TJA Marine Limited | Professional & scientific | 2023 |
| TM2 Safety Services Ltd | Professional & scientific | 2025 |
| TNE Connect Ltd | Information & communication | 2024 |
| TNT1 Elite Ltd | Arts & recreation | 2024 |
| Todd Cromwell Ltd | Real estate | 2014 |
| Tofos Lancaster Ltd | Hospitality | 2025 |
| TOO FAR Gone Ltd | Information & communication | 2023 |
| Tool Proof Ltd | Manufacturing | 2023 |
| Toola Ltd | Extraterritorial | 2018 |
| Top Access Solutions Ltd | Construction | 2018 |
| Torquil Macleod Books Ltd | Arts & recreation | 2014 |
| Tostevin Group Ltd | Administrative & support | 2019 |
| Total Carbon Limited | Information & communication | 2026 |
| Total Sales HQ Limited | Professional & scientific | 2025 |
| Total Tots Limited | Education | 2003 |
| Totally Local Lancaster CIC | Professional & scientific | 2021 |
| Tote Tent Ltd | Professional & scientific | 2025 |
| Tower Court (Lancaster) Management Company Limited | Real estate | 1988 |
| Townscape Town Planning and Heritage Consultant Limited | Professional & scientific | 2014 |
| Tpcs Limited | Information & communication | 2001 |
| TPM Construction Ltd | Construction | 2022 |
| TPM Fabrication Ltd | Construction | 2022 |
| Tracey Nichols Graphic Design Limited | Arts & recreation | 2009 |
| Tracy's Outside Catering Limited | Hospitality | 2013 |
| Trade Caravans Limited | Hospitality | 2017 |
| Trailer Swift Crew Catering Ltd | Hospitality | 2026 |
| Transform Healthcare Cambodia Ltd | Health & social care | 2013 |
| Translucent Dance Studio Limited | Arts & recreation | 2025 |