- LEO (FITZWILLIAM) LIMITED- 11924811 - Incorporated on 3 April 2019 
- FITZWILLIAM CONSTRUCTION LIMITEDDisolved- 13891929 - Dissolved on 19 March 2024 
- FITZWILLIAM MARGOT LIMITED- 16484761 - Incorporated on 30 May 2025 
- Harry Cooper, Mr. BARRETT- Born November 1982 - 18 Broom Park, Teddington, England, TW11 9RS 
- FITZWILLIAM & WEST LTDLiquidation- 08222168 - Incorporated on 20 September 2012 
- FITZWILLIAM ENTERPRISES LIMITEDDissolved- 08987963 - Dissolved on 27 August 2019 
- FITZWILLIAM BLACK LIMITEDActive - Proposal to Strike off- 08422560 - Incorporated on 27 February 2013 
- FITZWILLIAM ACADEMICS LTDActive - Proposal to Strike off- 11769989 - Incorporated on 16 January 2019 
- FITZWILLIAM PLACE LTD- 12769343 - Incorporated on 27 July 2020 
- PARKHILL FITZWILLIAM LIMITED- 11158571 - Incorporated on 19 January 2018 
- FITZWILLIAM STREET LTDActive - Proposal to Strike off- 12361653 - Incorporated on 12 December 2019 
- FITZWILLIAM ESTATES LTD- NI704386 - Incorporated on 7 November 2023 
- Michael Harry, Mr. MCHUGH- Born November 1945 - Piccadilly Business Centre Aldow Enterprise Park, Manchester, United Kingdom, M12 6AE 
- Michael Harry, Mr. MCHUGH- Born November 1945 - The Old Chapel Netherton Fold, Huddersfield, West Yorkshire, United Kingdom, HD4 7HB 
- HARI OM JEWELS LTD- 14729287 - Incorporated on 14 March 2023 
- FITZWILLIAM SIMON LIMITEDDissolved- 03045250 - Dissolved on 16 November 2010 
- PEMBROKE FITZWILLIAM LTDActive - Proposal to Strike off- 04624699 - Incorporated on 23 December 2002 
- FITZWILLIAM WINES LIMITEDDissolved- 04724553 - Dissolved on 10 May 2011 
- FITZWILLIAM HEALTHCARE LIMITED- 04159709 - Incorporated on 14 February 2001 
- FITZWILLIAM HOUSE(1869)- RC000189 - Incorporated on 1 January 1981