- HART OF HARTLAND LTD- 15836720 - Incorporated on 12 July 2024 
- MICHAEL&MICHAEL LIMITEDDisolved- 07678122 - Dissolved on 11 July 2023 
- HART HAMBLETON LIMITED- 01125993 - Incorporated on 1 August 1973 
- HARTT OLIVIER LTD- 07724637 - Incorporated on 1 August 2011 
- TRI UTILITIES LTD- 13660883 - Incorporated on 4 October 2021 
- HART AND HART CONSULTING LTDActive - Proposal to Strike off- 12320304 - Incorporated on 18 November 2019 
- HART TO HART HOMES LIMITED- 15702758 - Incorporated on 3 May 2024 
- HART 2 HART EXPRESS LIMITED- 05648098 - Incorporated on 7 December 2005 
- HART TO HART GLOBAL LIMITEDActive - Proposal to Strike off- 07979400 - Incorporated on 7 March 2012 
- BARRY HART PAMELA HART LTDDisolved- SC729157 - Dissolved on 12 September 2023 
- S.E. HART LTDActive - Proposal to Strike off- 08931294 - Incorporated on 10 March 2014 
- HART 2016 LTDActive - Proposal to Strike off- 10193216 - Incorporated on 23 May 2016 
- HART TO HART CONSULTANCY LTDDisolved- 13046440 - Dissolved on 17 May 2022 
- HART & HART CONSULTANCY SERVICES LIMITEDActive - Proposal to Strike off- 08379321 - Incorporated on 29 January 2013 
- HART 2 HART AGENCY LIMITEDActive - Proposal to Strike off- 08613319 - Incorporated on 17 July 2013 
- B B HART LTD- 09712742 - Incorporated on 31 July 2015 
- 53 HART LTD- 13383393 - Incorporated on 10 May 2021 
- HART & JOY C.I.C.Disolved- 14810680 - Dissolved on 7 May 2024 
- M A HART LTD- 07931551 - Incorporated on 1 February 2012 
- HART K9 LTDActive - Proposal to Strike off- 08375103 - Incorporated on 25 January 2013