- JOHN HOWLETT LIMITEDDissolved- 03283048 - Dissolved on 11 January 2011 
- KELLY HOWLETT LIMITEDActive - Proposal to Strike off- 10209597 - Incorporated on 1 June 2016 
- HOWLETT & DICKINSON LIMITED- 10523259 - Incorporated on 13 December 2016 
- LOZ HOWLETT LIMITEDDissolved- 06200100 - Dissolved on 30 October 2018 
- HOWLETT SUPPLIES LIMITEDDissolved- 03870195 - Dissolved on 29 June 2010 
- MARK HOWLETT LIMITED- 08046471 - Incorporated on 26 April 2012 
- HOWLETT ELECTRICAL LIMITED- 06401687 - Incorporated on 17 October 2007 
- HOWLETT SECURITY LTDDisolved- 10932213 - Dissolved on 9 January 2024 
- HOWLETT SERVICES LTDActive - Proposal to Strike off- 10930892 - Incorporated on 24 August 2017 
- HOWLETT INTERIORS LIMITEDActive - Proposal to Strike off- 10792343 - Incorporated on 26 May 2017 
- HOWLETT FILM LIMITED- 13424920 - Incorporated on 27 May 2021 
- HOWLETT CREATIVE LTD- 15055833 - Incorporated on 7 August 2023 
- HOWLETT CONSULTING LIMITEDDisolved- 07516675 - Dissolved on 12 June 2022 
- HOWLETT PROPERTIES LTDDisolved- SC680052 - Dissolved on 24 May 2022 
- HOWLETT PROPERTY LTDRECEIVERSHIP- 12432335 - Incorporated on 29 January 2020 
- HOWLETT ADVISORY LIMITED- 14727374 - Incorporated on 13 March 2023 
- KELVIN HOWLETT LTD- 08272255 - Incorporated on 29 October 2012 
- HOWLETT SERVICES LTDActive - Proposal to Strike off- 06204021 - Incorporated on 4 April 2007 
- HOWLETT ASSOCIATES LIMITEDDisolved- 03697676 - Dissolved on 22 March 2022 
- HOWLETT CONSTRUCTION LIMITED- 04217451 - Incorporated on 16 May 2001