- BATTLE BRAINS LTDActive - Proposal to Strike off- 10662436 - Incorporated on 9 March 2017 - First Floor, Devonshire House, 1 Mayfair Place, Mayfair, London, W1J 8AJ 
- BRAINSENSUM AI LTDDisolved- 14215014 - Dissolved on 4 April 2023 
- BRAINS & BUTTER LTD- 11584145 - Incorporated on 24 September 2018 
- BRICKS & BRAINS LTDDisolved- 10784757 - Dissolved on 3 September 2024 
- BET WITH BRAINS LTDActive - Proposal to Strike off- 10926075 - Incorporated on 22 August 2017 
- CRYSTAL BRAINS LTDDisolved- 07054287 - Dissolved on 26 July 2022 
- DECORATIVE BRAINS LTDDisolved- 12681775 - Dissolved on 30 November 2021 
- BRAINS ASSOCIATES LTDDisolved- 11992193 - Dissolved on 11 April 2023 
- BRAINS SOLUTIONS LTDDisolved- 14792331 - Dissolved on 17 September 2024 
- BRAINS SOMERSET LTD- 15125480 - Incorporated on 8 September 2023 
- M AND M CONCRETE LIMITED- 02492164 - Incorporated on 12 April 1990 
- STATE OF PLAY LIMITEDDissolved- 04742025 - Dissolved on 7 September 2010 
- BRAINS ALIGHT LTDActive - Proposal to Strike off- 08048808 - Incorporated on 27 April 2012 
- BRAINS&BRAWNS LTD.- 07826026 - Incorporated on 27 October 2011 
- PICK OUR BRAINS LTD- 12561080 - Incorporated on 17 April 2020 
- UNION OF BRAINS LTDActive - Proposal to Strike off- 11857927 - Incorporated on 4 March 2019 
- BRIGHT BRAINS LTDDisolved- 09554562 - Dissolved on 28 February 2023 
- SMOOTH BRAINS LTD- 13807007 - Incorporated on 17 December 2021 
- BRAINS FOR HIRE LTDDisolved- 14076680 - Dissolved on 11 June 2024 
- GROWTH & BRAINS LTD- 14308671 - Incorporated on 21 August 2022