| Tang-Valogne & LEE Ltd | Hospitality | 2019 |
| Tansid.Ai Limited | Transport & logistics | 2025 |
| Tapton Court Investments Limited | Real estate | 2008 |
| Taqueiros Ltd | Hospitality | 2013 |
| Tarlika Healthcare Ltd | Financial services | 2023 |
| TAS Digital Limited | Information & communication | 2010 |
| Tasla UK Limited | Wholesale & retail | 2024 |
| Tasty Morsels Ltd | Wholesale & retail | 2012 |
| Tasty Pizza & Grill Limited | Hospitality | 2022 |
| TAU Ceti Ltd | Information & communication | 2020 |
| Tavee Supply Ltd | Wholesale & retail | 2019 |
| Taxsmiths Ltd | Professional & scientific | 2022 |
| TAY7OR Company Ltd | Transport & logistics | 2018 |
| Taylor Made Aesthetics Clinic Ltd | Other services | 2026 |
| Taylors Close Limited | Households | 1981 |
| TCB Prosthodontics Ltd | Health & social care | 2012 |
| TCR Strategic Holdings Ltd | Real estate | 2026 |
| Tcsd Limited | Other services | 2019 |
| Td-Re Limited | Construction | 2019 |
| TDC Consultancy Limited | Professional & scientific | 2020 |
| TDC Project Services Ltd | Professional & scientific | 2019 |
| Tdidit Ltd | Manufacturing | 2025 |
| Teachsport Croydon Ltd | Education | 2015 |
| TEC4TEKKERS(DIGITAL) Ltd | Extraterritorial | 2023 |
| Tecflock Limited | Information & communication | 2019 |
| Tech Talent Enterprises Ltd | Information & communication | 2021 |
| TECH3 Gadgets Private Limited | Wholesale & retail | 2026 |
| Techanswer Ltd | Information & communication | 2019 |
| Technical and Event Services Ltd. | Arts & recreation | 2005 |
| Technocraft Ltd | Information & communication | 2017 |
| Technology for Good Limited | Information & communication | 2021 |
| Techouse Contracts Ltd | Extraterritorial | 2019 |
| Tectro Electrical Ltd | Construction | 2014 |
| TEE Consulting Ltd | Wholesale & retail | 2002 |
| Teece Connection Limited | Administrative & support | 2020 |
| Tektas Estates Ltd | Real estate | 2019 |
| Telpais Limited | Professional & scientific | 2016 |
| Tempora Mutantur Consultants Ltd. | Information & communication | 2012 |
| TEN Beech Avenue Management Limited | Real estate | 1999 |
| Teniola's Tresses Ltd | Wholesale & retail | 2025 |
| Tesdar Financial Services Limited | Real estate | 2007 |
| Test Along Limited | Information & communication | 2025 |
| TF Property Limited | Real estate | 2025 |
| Tfp-Invest Ltd | Real estate | 2019 |
| Thames Marine Engineering Limited | Manufacturing | 2006 |
| THE Adventurers Play Scheme Ltd | Health & social care | 2022 |
| THE Aelfa Arts Hub LLP | | 2020 |
| THE Animal Rangers Conservation Centre Limited | Education | 2016 |
| THE ARK Place Limited | Hospitality | 2018 |
| THE Autistic Chef Limited | Hospitality | 2022 |
| THE Ayurvedic Clinic Ltd | Health & social care | 2010 |
| THE Beautiful Mouth Ltd | Information & communication | 2015 |
| THE Beauty Lounge Elmfield Limited | Other services | 2013 |
| THE Bread and Spirit of Life Co Ltd | Hospitality | 2024 |
| THE Builders House | Other services | 2010 |
| THE Building Co. Ltd | Construction | 2020 |
| THE Chippy Finsbury Limited | Hospitality | 2019 |
| THE Clubb HQ Ltd | Education | 2025 |
| THE Croydon Boiler Company Ltd | Construction | 2019 |
| THE Customer Experience Limited | Hospitality | 2023 |
| THE CWM Partnership Limited | Professional & scientific | 2001 |
| THE Egyin Diary Ltd | Information & communication | 2025 |
| THE Eventists Ltd | Administrative & support | 2024 |
| THE Everyday Project Manager Ltd | Professional & scientific | 2020 |
| THE Family Practice London Limited | Wholesale & retail | 2012 |
| THE Front Room Cafe Ltd | Hospitality | 2012 |
| THE Gallop (South Croydon) Management Limited | Real estate | 2023 |
| THE Golden Grill Catering Limited | Hospitality | 2024 |
| THE Hair Boutique (UK) Ltd | Other services | 2013 |
| THE Leadership Village Ltd | Education | 2021 |
| THE Little Olive Tree Ltd | Households | 2023 |
| THE London Law Consultancy Ltd | Professional & scientific | 2025 |
| THE London Transportation Company Limited | Transport & logistics | 2026 |
| THE London Web Design Agency Ltd | Information & communication | 2020 |
| THE Lost Octave Ltd | Education | 2024 |
| THE Middle East Association | Other services | 2018 |
| THE Montessori Garden Childcare Limited | Health & social care | 2023 |
| THE Nail Studio Hamsey Green Limited | Other services | 2026 |
| THE Nobel Nurse Ltd | Public administration | 2025 |
| THE Orange Dough Company Limited | Wholesale & retail | 2014 |
| THE Ottoman CUT Limited | Other services | 2018 |
| THE Payroll LAB Limited | Professional & scientific | 2021 |
| THE Plaster Shop Ltd | Manufacturing | 2022 |
| THE Pure Supplements Ltd | Manufacturing | 2023 |
| THE Red House RTM Company Limited | Households | 2018 |
| THE Residents of 46 Blenheim Crescent Limited | Households | 2019 |
| THE Restorative Specialist Ltd | Health & social care | 2026 |
| THE Rock Salt (Epsom) Limited | Hospitality | 2019 |
| THE Rockabilly Rave Limited | Arts & recreation | 2010 |
| THE Rockswood Association | Professional & scientific | 2022 |
| THE Rulers Traders Ltd | Wholesale & retail | 2025 |
| THE Slade Corporation Limited | Extraterritorial | 2009 |
| THE Statement Canvas Ltd | Wholesale & retail | 2023 |
| THE Stone Oven Limited | Hospitality | 2016 |
| THE Sun Lounger Ltd | Other services | 2019 |
| THE Supply Republic Limited | Wholesale & retail | 2020 |
| THE Tax Chaps Ltd | Professional & scientific | 2019 |
| THE Thinking Luxury Limited | Professional & scientific | 2022 |
| THE Travel Trend Ltd | Administrative & support | 2025 |
| THE Trusted Group Ltd | Construction | 2019 |