| THE Talent Place Limited | Administrative & support | 2017 |
| THE Valley Apartments (Reigate) Management Company Limited | Households | 2010 |
| THE Village Barbers (Surrey) Ltd | Other services | 2022 |
| THE Waddon Priory Management Company Limited | Households | 1987 |
| Thermoserv Limited | Construction | 1977 |
| Thornbury Cottage Limited | Information & communication | 2016 |
| TMC Corporate Finance Limited | Financial services | 2002 |
| TO Tokyo Films Ltd | Information & communication | 2012 |
| Tolcoro Ltd | Households | 2000 |
| Torwood Lane Management Limited | Households | 2018 |
| Trevereux Management Company Limited | Households | 2013 |
| Triple Seven Assessors Limited | Wholesale & retail | 2022 |
| Tristar Holdings Limited | Extraterritorial | 1987 |
| Trixie Music Limited | Arts & recreation | 2012 |
| Trixie Publishing Limited | Administrative & support | 2014 |
| Truly Local Products Limited | Extraterritorial | 2011 |
| TS289 Ltd | Wholesale & retail | 2022 |
| Tseq Management Limited | Professional & scientific | 2012 |
| Turners Meadow Management Company Limited | Households | 1987 |
| Tutoring Today Ltd | Education | 2014 |
| Urban NAV Ltd | Transport & logistics | 2024 |
| Urquhart Court (Freehold) Limited | Households | 1993 |
| Utiligraph Limited | Manufacturing | 2023 |
| V and B Facilities and Building Maintenance Limited | Construction | 2007 |
| Valley Court Freehold Limited | Households | 2014 |
| Valley Road Investments Limited | Households | 1974 |
| Verecroft House Management Limited | Extraterritorial | 1987 |
| Veyaro Group Ltd | Wholesale & retail | 2024 |
| Vicky Dowdall Management Limited | Administrative & support | 2010 |
| Vivi Spiritus LAB Ltd | Manufacturing | 2021 |
| Walltastic Ltd | Manufacturing | 2002 |
| Warham Road (South Croydon) Residents Company Limited | Households | 1971 |
| Watendone Manor Residents Society Limited | Households | 1968 |
| Water Hygiene Management Limited | Water & waste | 1995 |
| Watt NOW Electrical Ltd | Construction | 2020 |
| Waverley Two Housing Limited | Households | 1984 |
| Welcomes Terrace Management Ltd | Real estate | 2023 |
| Whyteacre (1981) Limited | Households | 1981 |
| Whytebeam View Freeholders Limited | Households | 1997 |
| Whytebeam View Management Company Limited | Households | 1991 |
| Whyteleafe Barber Ltd | Other services | 2026 |
| Whyteleafe Consultancy Limited | Professional & scientific | 2025 |
| Whyteleafe Football Ground Management Limited | Arts & recreation | 2024 |
| Whyteleafe Grill Ltd | Hospitality | 2025 |
| Whyteleafe Pizza & Grill Ltd | Hospitality | 2018 |
| Whytleafe Pizza Ltd | Hospitality | 2021 |
| Will Antill Limited | Information & communication | 2015 |
| Wingfield House Freehold Limited | Households | 2005 |
| Wollaton House Limited | Households | 2009 |
| Woodlands (Purley) Management Limited | Households | 1987 |
| Woodlands Residents Redhill Limited | Households | 2015 |
| Woodside Green (Croydon) NO.1 Residents Company Limited | Households | 2022 |
| Woodside Green (Croydon) NO.2 Residents Company Limited | Households | 1985 |
| XAN Labs International Ltd | Information & communication | 2017 |
| Xylopia Ltd | Information & communication | 2018 |
| Yatin Ltd | Information & communication | 2019 |
| Yorktown Partners LLP | | 2010 |
| Yuriy Starikov Ltd | Information & communication | 2021 |
| Z King and SON Electrics Limited | Construction | 2013 |
| Zee&Bisu Constructions Ltd | Manufacturing | 2025 |
| ZF Electrical Services Ltd | Construction | 2019 |