- HARMAN LOGISTICS LTDDisolved- 13006119 - Dissolved on 9 November 2021 
- HARMAN-SMITH LIMITED- 15807776 - Incorporated on 28 June 2024 
- HARMAN CREATIONS LTD- 15840025 - Incorporated on 15 July 2024 
- HARMAN SUSSEX LIMITED- 16008092 - Incorporated on 9 October 2024 
- HARMAN BROTHERS LTD- 16163776 - Incorporated on 5 January 2025 
- HARMAN WHITELEY LTD- 16222943 - Incorporated on 1 February 2025 
- UNIQUE REBELS UNION LTD- 07799711 - Incorporated on 6 October 2011 
- BALMER KNIGHTCOTT ESTATES LIMITED- 00239733 - Incorporated on 23 May 1929 
- HARMAN WAREHOUSING LIMITED- 05139441 - Incorporated on 27 May 2004 
- HARMAN TECHNOLOGY LIMITED- 05227615 - Incorporated on 10 September 2004 
- HARMAN ACOUSTICS LIMITEDDissolved- 06510565 - Dissolved on 29 September 2009 
- HARMAN STORAGE LIMITED- 04503908 - Incorporated on 6 August 2002 
- HARMAN BUILDERS LTDDissolved- 05684965 - Dissolved on 17 August 2010 
- HARMAN FOODS LIMITEDActive - Proposal to Strike off- 08111315 - Incorporated on 19 June 2012 
- HARMAN ELECTRICAL LIMITED- 06527822 - Incorporated on 7 March 2008 
- HARMAN HEALY LIMITEDIn Administration- 02977186 - Incorporated on 10 October 1994 
- HARMAN CLAYTON LIMITEDDissolved- 03039269 - Dissolved on 12 July 2011 
- HARMAN EYECARE LIMITED- 03436212 - Incorporated on 18 September 1997 
- HARMAN HEALTHCARE LIMITEDActive - Proposal to Strike off- 07986537 - Incorporated on 12 March 2012 
- HARMAN TELEMARKETING LTDDissolved- 07692746 - Dissolved on 8 November 2016