- P J KNOWLES LTD- 13712748 - Incorporated on 29 October 2021 
- KNOWLES'S LTDActive - Proposal to Strike off- 08077904 - Incorporated on 22 May 2012 
- M&C KNOWLES LTDDisolved- 14347825 - Dissolved on 19 December 2023 
- N KNOWLES LTDActive - Proposal to Strike off- 09636436 - Incorporated on 12 June 2015 
- J KNOWLES LTD- 08761142 - Incorporated on 4 November 2013 
- E KNOWLES LTD- 08568108 - Incorporated on 13 June 2013 
- V J KNOWLES LTDDisolved- 11229254 - Dissolved on 21 December 2021 
- M&D KNOWLES LTD- 12496883 - Incorporated on 4 March 2020 
- KNOWLES 66 LTDDisolved- SC787144 - Dissolved on 1 April 2025 
- NR KNOWLES LTDDisolved- 13644398 - Dissolved on 4 March 2025 
- KNOWLES EUROPE- 00703640 - Incorporated on 19 September 1961 
- KNOWLESY LTDDisolved- 14916423 - Dissolved on 8 July 2025 
- KNOWLES&CO LTDActive - Proposal to Strike off- 08688416 - Incorporated on 12 September 2013 
- AC KNOWLES LTD- 11899276 - Incorporated on 22 March 2019 
- NZ KNOWLES LTDDisolved- 13760092 - Dissolved on 4 June 2024 
- MARY LOUISE CLARK ASSOCIATES LIMITED- 06009991 - Incorporated on 27 November 2006 
- DR KNOWLES LTD.Liquidation- 05606642 - Incorporated on 28 October 2005 
- BS KNOWLES LTDDissolved- 04926572 - Dissolved on 18 February 2014 
- MV KNOWLES LTDDisolved- 13873143 - Dissolved on 1 July 2025 
- EM KNOWLES LTDDisolved- 13623152 - Dissolved on 18 February 2025