- HOWARTH PACKAGING LIMITEDActive - Proposal to Strike off- 01021200 - Incorporated on 17 August 1971 
- HOWARTH MCSWAIN LIMITED- 04420688 - Incorporated on 19 April 2002 
- RICHARDSON HOWARTH LLPDissolved- OC314442 - Dissolved on 8 October 2019 
- HOWARTH INVESTMENTS LIMITED- 00830414 - Incorporated on 9 December 1964 
- ALAN HOWARTH LIMITED- 02218659 - Incorporated on 8 February 1988 
- HOWARTH HOTEL LIMITED- 06584564 - Incorporated on 6 May 2008 
- HOWARTH LEISURE LIMITED- 05080254 - Incorporated on 22 March 2004 
- KITWOOD HOWARTH LIMITED- 07429966 - Incorporated on 4 November 2010 
- HOWARTH & JOHNSTON LIMITED- SC272129 - Incorporated on 18 August 2004 
- HOWARTH (FINANCE) LIMITEDDissolved- 06617687 - Dissolved on 20 August 2013 
- HOWARTH COMMUNICATIONS LIMITEDLiquidation- 03036004 - Incorporated on 21 March 1995 
- HOWARTH CONSULTING LTD- 04661890 - Incorporated on 11 February 2003 
- HOWARTH GROUP LIMITEDActive - Proposal to Strike off- 06045858 - Incorporated on 9 January 2007 
- HOWARTH ASSETS LIMITEDLiquidation- 09737535 - Incorporated on 18 August 2015 
- LUKE HOWARTH LIMITEDDisolved- 08282714 - Dissolved on 7 December 2021 
- HOWARTH ELECTRICAL LIMITEDActive - Proposal to Strike off- 09247545 - Incorporated on 3 October 2014 
- ROBERT HOWARTH LIMITED- 09273293 - Incorporated on 21 October 2014 
- HOWARTH TRANSPORT LTDActive - Proposal to Strike off- 08624223 - Incorporated on 25 July 2013 
- HOWARTH LAWLOR LIMITED- 09389563 - Incorporated on 15 January 2015 
- HOWARTH ESTATES LIMITED- 10952628 - Incorporated on 8 September 2017