- STUART HOWARTH LTDActive - Proposal to Strike off- 09972690 - Incorporated on 27 January 2016 
- HOWARTH HR LIMITED- 10081078 - Incorporated on 23 March 2016 
- HOWARTH ENERGY LTD- 10060520 - Incorporated on 14 March 2016 
- HOWARTH ARMSBY LTD- 12551902 - Incorporated on 8 April 2020 
- HOWARTH HOMES (STB) LIMITED- 08555772 - Incorporated on 4 June 2013 - 20 Riverside Way, Uxbridge, UB8 2YF 
- HOWARTH'S WAY LIMITED- SC235016 - Incorporated on 6 August 2002 
- P J HOWARTH & SON LIMITEDDisolved- 05555939 - Dissolved on 27 July 2024 
- HOWARTH COLLINS LTDDisolved- 09684449 - Dissolved on 13 June 2023 
- HOWARTHS GARAGE LTD- 11810082 - Incorporated on 6 February 2019 - Units 245 & 247, Ashley Industrial Estate, Mirfield, WF14 9DL 
- W HOWARTH ESTATES LTD- 14014346 - Incorporated on 31 March 2022 
- HOWARTH PARKER & CO LTD- 13095290 - Incorporated on 22 December 2020 
- LAMBERT HOWARTH LIMITEDLiquidation- 00486101 - Incorporated on 6 September 1950 
- LANGTON HOWARTH LIMITEDLiquidation- 05896575 - Incorporated on 4 August 2006 
- SAMUEL HOWARTH LIMITED- 01258306 - Incorporated on 13 May 1976 
- HOWARTH ASSOCIATES LIMITEDActive - Proposal to Strike off- 04414944 - Incorporated on 11 April 2002 
- HOWARTH SWITCHGEAR LIMITEDDisolved- SC062647 - Dissolved on 27 September 2023 
- CARL HOWARTH LIMITEDDissolved- 05520991 - Dissolved on 16 March 2010 
- HOWARTH BROS. LIMITED- 02358728 - Incorporated on 10 March 1989 
- HOWARTH LAWS LIMITEDActive - Proposal to Strike off- 07936502 - Incorporated on 6 February 2012 
- HOWARTH PROJECTS LIMITEDLiquidation- 06318628 - Incorporated on 19 July 2007