| Tech Razor Ltd | Information & communication | 2022 |
| Techq Limited | Information & communication | 2017 |
| Techvape Ltd | Wholesale & retail | 2022 |
| Techvest Ltd. | Information & communication | 2012 |
| Techvista Consulting Ltd | Information & communication | 2024 |
| Teen Crisis UK | Health & social care | 2007 |
| Teknovanta UK Ltd | Information & communication | 2026 |
| Telisma Limited | Health & social care | 2025 |
| TEN PIN Records Ltd | Wholesale & retail | 2022 |
| Tensen Ltd. | Information & communication | 2016 |
| Testasys Technologies Limited | Wholesale & retail | 2015 |
| Thai Siam Purley Ltd | Hospitality | 2025 |
| THE 4TH Chamber Limited | Real estate | 2023 |
| THE Aroma Plug Ltd | Wholesale & retail | 2025 |
| THE Brown Playbook Ltd | Information & communication | 2025 |
| THE Carter Organisation Ltd. | Construction | 2000 |
| THE Central Kitchen London Limited | Manufacturing | 2026 |
| THE Chipper Group Ltd | Construction | 2020 |
| THE Collegiate Trust | Education | 2012 |
| THE Collegiate Trust Trading Limited | Hospitality | 2014 |
| THE Consultant AI Limited | Professional & scientific | 2024 |
| THE Daniel Spargo-Mabbs Foundation | Education | 2014 |
| THE Empire Business Ltd | Wholesale & retail | 2022 |
| THE European Centre for Near Eastern Researches and Studies (Ecners) | Professional & scientific | 2010 |
| THE Fashion Accessory Limited | Wholesale & retail | 2004 |
| THE Fifth Dimension Consultancy Ltd | Real estate | 2025 |
| THE Goat Master Limited | Wholesale & retail | 2025 |
| THE Graphics Forum Limited | Manufacturing | 1989 |
| THE Gurkha Naan Ltd | Hospitality | 2023 |
| THE Hemslie Ltd | Wholesale & retail | 2020 |
| THE House of Bailey Limited | Wholesale & retail | 2024 |
| THE Introvert Space CIC | Education | 2022 |
| THE Kitchen Makeover Shop Limited | Manufacturing | 2014 |
| THE Kurtain Kompany Ltd | Other services | 2025 |
| THE Libyan British Business Council Secretariat | Other services | 2004 |
| THE Lounge Purley Limited TA ZEN Lounge Ltd | Hospitality | 2019 |
| THE Maples RES. Assoc. Co. (Purley) Limited | Households | 1994 |
| THE Moore Marketing Co. Ltd | Professional & scientific | 2025 |
| THE Nartey Group Ltd | Financial services | 2025 |
| THE Optical Trading Company Limited | Wholesale & retail | 2008 |
| THE Oregano Wood Pizza of Purley Ltd | Hospitality | 2022 |
| THE Original Property Organisation Ltd | Construction | 2023 |
| THE Params Care Limited | Real estate | 2011 |
| THE Philadelphia Mission for Christ | Other services | 2011 |
| THE Poppins AL Ltd | Administrative & support | 2022 |
| THE Reality Check Show Ltd | Information & communication | 2023 |
| THE Residence Edit Ltd | Real estate | 2026 |
| THE School House Day Nursery Limited | Health & social care | 2023 |
| THE Senora Co Limited | Hospitality | 2025 |
| THE Silver Blue Butterfly Ltd | Other services | 2020 |
| THE Soul Cart Ltd | Arts & recreation | 2022 |
| THE Source Experience Ltd | Arts & recreation | 2015 |
| THE Spinney Open Space Management Company Limited | Households | 2024 |
| THE Velvet Lather Co Limited | Other services | 2025 |
| THE Väsby Ltd | Professional & scientific | 2020 |
| THE Website Wizard Limited | Information & communication | 2020 |
| THE Wedding Photography Mentor Ltd | Professional & scientific | 2025 |
| THE Wedding Touch Ltd | Other services | 2018 |
| Theautomatedai.Com Ltd | Information & communication | 2025 |
| Thefaceclub Limited | Other services | 2021 |
| Thesmiklegroup Ltd | Information & communication | 2024 |
| Thilway Ltd | Information & communication | 2013 |
| Think and Grow Talent Ltd | Administrative & support | 2025 |
| Think Residential Ltd | Real estate | 2025 |
| THM Purley Ltd | Manufacturing | 2024 |
| THU Xuan Limited | Other services | 2023 |
| Tidebrook Wealth Limited | Professional & scientific | 2019 |
| Tina Property Solutions Ltd | Real estate | 2026 |
| Tip-Top Hair Limited | Other services | 2002 |
| Tizi Trading Limited | Wholesale & retail | 2024 |
| Tjarcorp Limited | Professional & scientific | 2013 |
| Tjarks and Tjarks Design Limited | Arts & recreation | 2005 |
| Tjarks Holdings Limited | Financial services | 2023 |
| TK Beauty Atelier Ltd | Other services | 2026 |
| TL Consultancy Services Ltd | Information & communication | 2021 |
| TMP Automotive Limited | Wholesale & retail | 2022 |
| Tobank Medicals Limited | Health & social care | 2008 |
| Todryk Services Ltd | Construction | 2024 |
| TOK Corporation Limited | Information & communication | 2019 |
| Tome of Tales Ltd | Wholesale & retail | 2020 |
| Toolkit Ltd | Information & communication | 2024 |
| Top Notch Tree Care Limited | Agriculture & fishing | 2013 |
| Top Right Investments Limited | Professional & scientific | 2017 |
| Top Right Solutions Limited | Professional & scientific | 2015 |
| Top Tier Property Group Ltd | Real estate | 2026 |
| Topaz Penge Limited | Real estate | 2025 |
| Topnotch Accountancy Services Limited | Professional & scientific | 2023 |
| Topp Consultants Ltd | Information & communication | 2020 |
| Topsday Medical Services Limited | Health & social care | 2009 |
| Torduff Consultants Limited | Other services | 2014 |
| Toriyama Ltd | Information & communication | 2024 |
| Tornado Performance Ltd | Information & communication | 2017 |
| TOS Funerals Limited | Other services | 2022 |
| Touche Purley Ltd | Other services | 2025 |
| TRA Holdings Limited | Real estate | 2020 |
| Trademark Interiors Limited | Construction | 1996 |
| Trafalgar Place Limited | Real estate | 2016 |
| Transfercorp Limited | Financial services | 2014 |
| Transform (UK) Ltd | Administrative & support | 2002 |
| Treasures T Ltd | Wholesale & retail | 2024 |