- TREMEER HARMAN LIMITEDActive - Proposal to Strike off- 11279553 - Incorporated on 28 March 2018 
- HARMAN SOLUTIONS LIMITEDDisolved- 07315920 - Dissolved on 19 October 2021 
- HARMAN ENERGY LIMITED- 06966767 - Incorporated on 20 July 2009 
- HARMAN KEMP LIMITED- 02648779 - Incorporated on 25 September 1991 
- JOHN HARMAN LIMITEDDissolved- 06048376 - Dissolved on 23 August 2011 
- HARMAN CONSTRUCTION LIMITED- 06812683 - Incorporated on 6 February 2009 
- BERNARD HARMAN LIMITEDDissolved- 06908831 - Dissolved on 11 January 2011 
- HARMAN POWER LIMITEDDissolved- 07820960 - Dissolved on 22 October 2013 
- GRAHAM HARMAN LIMITED- 04553690 - Incorporated on 4 October 2002 
- HARMAN CONTRACTORS LIMITEDDisolved- 05877651 - Dissolved on 20 February 2024 
- HARMAN SCAFFOLDING LIMITEDLiquidation- 06336184 - Incorporated on 7 August 2007 
- LEWIS HARMAN LIMITEDActive - Proposal to Strike off- 08690900 - Incorporated on 16 September 2013 
- HARMAN SHOPFITTERS LIMITED- 08680741 - Incorporated on 6 September 2013 
- HARMAN CHARCOAL LIMITED- 08913022 - Incorporated on 26 February 2014 
- HARMAN BIDCO LIMITEDActive - Proposal to Strike off- 09749001 - Incorporated on 25 August 2015 
- HARMAN CONTRACTING LTDLiquidation- 09264832 - Incorporated on 15 October 2014 
- HARMAN CONSULTANTS LIMITEDActive - Proposal to Strike off- 08950255 - Incorporated on 20 March 2014 
- HARMAN CARPENTRY LIMITEDDisolved- 10704650 - Dissolved on 3 March 2025 
- HARMAN HOUSE LIMITED- 11175288 - Incorporated on 29 January 2018 
- HARMAN CARE LIMITED- 13803039 - Incorporated on 15 December 2021