- THIRTYONEK LTDDisolved- 13250875 - Dissolved on 9 August 2022 
- THIRTY 9 LIMITED- 16046227 - Incorporated on 28 October 2024 
- TWO FIVE FIVE LIMITED- 10277335 - Incorporated on 13 July 2016 
- FIVE FIVE ONE LIMITED- 08876564 - Incorporated on 5 February 2014 
- THIRTY 3 ABOVE LTDDissolved- 04560243 - Dissolved on 13 October 2010 
- B THIRTY LIMITED- 07188232 - Incorporated on 12 March 2010 
- THIRTYTHREEMEDIA LTD- 07192558 - Incorporated on 17 March 2010 
- 3 THIRTY SEVEN LTD- 07768815 - Incorporated on 9 September 2011 
- THIRTYTWOTREES LTDDissolved- 08449046 - Dissolved on 28 August 2018 
- THIRTY ONE FIT LTDActive - Proposal to Strike off- 11710929 - Incorporated on 4 December 2018 
- THIRTYTHIRTYPRINT LTD- 12561691 - Incorporated on 17 April 2020 
- THIRTY6MILES LTDActive - Proposal to Strike off- 11779873 - Incorporated on 22 January 2019 
- THIRTYFOUR LTDActive - Proposal to Strike off- 10148444 - Incorporated on 26 April 2016 
- THIRTY NINE QG LTDDisolved- 11265523 - Dissolved on 15 February 2022 
- THIRTYANDTHRIVING LTD- 12330054 - Incorporated on 25 November 2019 
- THIRTY72 LIMITEDDisolved- 12297635 - Dissolved on 29 April 2025 
- THIRTY ONE MCR LTDDisolved- 13885187 - Dissolved on 11 July 2023 
- FIRST THIRTY LTD- 14129757 - Incorporated on 25 May 2022 
- THIRTY FIRST LTD- 15460816 - Incorporated on 2 February 2024 
- DRC FUND MANAGEMENT LIMITED- 06608096 - Incorporated on 2 June 2008