| Tech Studio X Ltd | Information & communication | 2022 |
| Techloop Ltd | Information & communication | 2018 |
| Technical Heating Services Limited | Construction | 2003 |
| Technodelic Ltd | Information & communication | 2026 |
| Technospeak Limited | Information & communication | 1993 |
| Tecni-Form Limited | Manufacturing | 1970 |
| Tecsilon Ltd | Information & communication | 2025 |
| Teddy Edwards Franchise Ltd | Professional & scientific | 2021 |
| Teddy Edwards Hove Ltd | Other services | 2020 |
| Teddy Edwards Worthing Limited | Other services | 2021 |
| TEE & Torque Limited | Administrative & support | 2025 |
| Tegnall Limited | Real estate | 2025 |
| Teknovate Ltd | Wholesale & retail | 2009 |
| Tekton Joinery & Construction Ltd | Construction | 2020 |
| Telecom Services & Maintenance Limited | Information & communication | 2000 |
| Telic Corporation Limited | Information & communication | 2003 |
| Telserman Ltd | Information & communication | 2016 |
| Telum Technology Ltd | Information & communication | 2010 |
| Tempest & Woods Limited | Administrative & support | 2013 |
| Temple Heights Brighton Limited | Households | 2005 |
| Temple Pilates Studios Limited | Arts & recreation | 2024 |
| Temple Productions Limited | Information & communication | 2003 |
| Temple Theatre Limited | Arts & recreation | 2008 |
| Tempor Limited | Information & communication | 2007 |
| Temporality Ltd | Information & communication | 2011 |
| TEN Eaton Road (Freehold) Limited | Households | 2017 |
| Tenants' Association 67 Lansdowne Place Limited | Extraterritorial | 2011 |
| Tenb Ltd | Professional & scientific | 2013 |
| Teneightyone Limited | Administrative & support | 2016 |
| Tenet Build Ltd | Construction | 2025 |
| Tenner Films Limited | Information & communication | 2011 |
| Teonville Limited | Information & communication | 2024 |
| Teresa Malinowska Consulting Ltd | Real estate | 2021 |
| Terminus Estate Investments Ltd | Real estate | 2023 |
| Terra Nova Projects Ltd | Construction | 2022 |
| Terra Technology Solutions Limited | Information & communication | 2023 |
| Terraza Ltd | Real estate | 2021 |
| Tesla Pubs Limited | Hospitality | 2021 |
| Tesol Oxford Ltd | Education | 2018 |
| Tesoro Creative Ltd | Professional & scientific | 2021 |
| Tessellutions Ltd | Professional & scientific | 2017 |
| Tetbury Leisure Limited | Hospitality | 2024 |
| TEV Property Limited | Real estate | 2026 |
| Teviot Partners LLP | | 2016 |
| Textbook Investments Limited | Construction | 2018 |
| TGL Group Ltd | Administrative & support | 2014 |
| Thayil Property Limited | Real estate | 2026 |
| THE 17 Melville Road Residents Association Limited | Hospitality | 1994 |
| THE 22 Norton Road Management Company Limited | Households | 2000 |
| THE 360 Mama Limited | Health & social care | 2023 |
| THE 55 Kingscourt Road Management Company Limited | Households | 1987 |
| THE a & C-Zone Concept Limited | Professional & scientific | 2012 |
| THE ADD Something Company Ltd | Administrative & support | 2020 |
| THE Adelaide Holdco Limited | Health & social care | 2021 |
| THE Aesthetic Haus Ltd | Other services | 2026 |
| THE Aesthetic Rooms Ltd | Other services | 2022 |
| THE Aldiss Award Ltd | Education | 2024 |
| THE Ambassadors (Hove) Limited | Households | 1994 |
| THE Appliance Club Limited | Wholesale & retail | 2021 |
| THE Archive Clothing Ltd | Wholesale & retail | 2026 |
| THE Art Department Limited | Arts & recreation | 2011 |
| THE Awake Political Party (Brighton) Limited | Information & communication | 2023 |
| THE Ayaan Group Limited | Health & social care | 2020 |
| THE Bakeologist Limited | Manufacturing | 2021 |
| THE Ballantine Management Company Limited | Households | 2018 |
| THE Bees Mouth Ltd | Hospitality | 2004 |
| THE Best of Broadway Ltd | Real estate | 2022 |
| THE Best Players Management Ltd | Arts & recreation | 2020 |
| THE Better Half Holdings Limited | Hospitality | 2020 |
| THE Big Push Music Limited | Wholesale & retail | 2026 |
| THE Block Co (Brighton and Hove) Ltd | Households | 2026 |
| THE Bookkeeping Transition Hub Ltd | Professional & scientific | 2024 |
| THE Books Balance Ltd | Professional & scientific | 2024 |
| THE Box FAN Ltd | Wholesale & retail | 2025 |
| THE Box Gallery (London) Limited | Wholesale & retail | 2023 |
| THE Boys' Cafe & Eatery Limited | Hospitality | 2015 |
| THE Brain Spa Ltd | Administrative & support | 2023 |
| THE Braveheart CIO Group Limited | Administrative & support | 2025 |
| THE Breakfast Chef Ltd | Hospitality | 2024 |
| THE Brighton Removals Company Ltd | Transport & logistics | 2012 |
| THE Brighton Tiling Company Ltd | Construction | 2018 |
| THE Brow Studio Limited | Other services | 2009 |
| THE Bugbar Limited | Professional & scientific | 2017 |
| THE Businocrats Limited | Wholesale & retail | 2023 |
| THE Buyer Agency Limited | Real estate | 2022 |
| THE Cabinet Door Shop Ltd | Wholesale & retail | 2009 |
| THE California Shutter and Blind Company Limited | Extraterritorial | 2013 |
| THE California Shutter Company Limited | Extraterritorial | 2012 |
| THE Capability Brown Society Limited | Administrative & support | 2016 |
| THE Car Girl Limited | Wholesale & retail | 2025 |
| THE Casual Observer Ltd | Professional & scientific | 2011 |
| THE Chalk Yard (Leasehold) Management Company Ltd | Households | 2024 |
| THE Chalk Yard Management Company Ltd | Households | 2024 |
| THE Chichester Diocesan Fund and Board of Finance (Incorporated) | Other services | 1914 |
| THE Clean Food Growing Company Limited | Wholesale & retail | 2023 |
| THE Clearance RUG Company Ltd | Wholesale & retail | 2019 |
| THE Cliftons Brighton Limited | Administrative & support | 2010 |
| THE Coaching Approach Ltd | Professional & scientific | 2024 |
| THE Collab Agency Limited | Arts & recreation | 2019 |
| THE Consortium (41/42 Brunswick Terrace) Ltd | Hospitality | 2017 |