- HOWARTH FLOORING LTD- 06778407 - Incorporated on 22 December 2008 
- HOWARTH SOLUTIONS LIMITEDDissolved- 07376940 - Dissolved on 26 February 2013 
- HOWARTH DAVIS LIMITEDLiquidation- 00963756 - Incorporated on 13 October 1969 
- HOWARTH ENTERPRISES LIMITEDActive - Proposal to Strike off- 08231918 - Incorporated on 27 September 2012 
- HENNESSY HOWARTH LIMITED- 09627850 - Incorporated on 8 June 2015 
- CARL HOWARTH LIMITED- 09714387 - Incorporated on 3 August 2015 
- HOWARTH ENTERPRISES LTDActive - Proposal to Strike off- NI633827 - Incorporated on 23 September 2015 
- HOWARTH BRACKIN LIMITED- 09220765 - Incorporated on 16 September 2014 
- HOWARTH CARPENTRY LIMITEDLiquidation- 09076775 - Incorporated on 9 June 2014 
- HOWARTH DIGITAL LIMITEDDisolved- 13509218 - Dissolved on 17 January 2023 
- HOWARTH & WOOTTON LTDDisolved- 14561770 - Dissolved on 4 June 2024 
- HOWARTH BRICKWORK LTD- 15089070 - Incorporated on 22 August 2023 
- HOWARTH CONTRACTING LTD- 15979037 - Incorporated on 25 September 2024 
- HOWARTH PROJECTS LTD- 16539747 - Incorporated on 24 June 2025 
- HOWARTHCO LIMITED- 04583206 - Incorporated on 6 November 2002 
- HOWARTH ARMSBY (UK) LTDActive - Proposal to Strike off- 05457929 - Incorporated on 20 May 2005 
- THE HOWARTH GROUP LTD- 13857160 - Incorporated on 18 January 2022 
- K HOWARTH ESTATES LTD- 14797474 - Incorporated on 12 April 2023 
- HOWARTH OF LONDON LIMITED- 00492396 - Incorporated on 7 March 1951 
- MORRELL HOWARTH LTD- 10255799 - Incorporated on 28 June 2016