- MPP (BUCKINGHAM) LTD- 13068724 - Incorporated on 7 December 2020 
- BUCKINGHAMRE LTD- 13533006 - Incorporated on 27 July 2021 
- RHYTHM & REASON CONSULTING LTD- 16058696 - Incorporated on 4 November 2024 
- DONALD SMITH LTDDisolved- 04423350 - Dissolved on 7 June 2022 
- W M DONALD LIMITED- SC156961 - Incorporated on 28 March 1995 
- EVANS DONALD LLPDissolved- OC304426 - Dissolved on 8 December 2009 
- JR DONALDSON LTD- 10673024 - Incorporated on 15 March 2017 
- DONALD HICKS LTDDisolved- SC577583 - Dissolved on 30 August 2022 
- ON DONALDSON LTDDisolved- 13723313 - Dissolved on 15 April 2025 
- TM DONALDSON LTDDisolved- 13284999 - Dissolved on 18 June 2024 
- JAMES DONALD LTD- 14941814 - Incorporated on 16 June 2023 
- LW DONALDSON LTDActive - Proposal to Strike off- 13957322 - Incorporated on 5 March 2022 
- CP DONALDSON LTDDisolved- NI681651 - Dissolved on 18 July 2023 
- DONALDSONLOS LTDDisolved- 15006372 - Dissolved on 17 December 2024 
- VERSO DONALD LTD- 15779811 - Incorporated on 15 June 2024 
- DONALD BROWN 1977 LTD- SC839976 - Incorporated on 4 March 2025 
- DONALD. K MCGILLIVRAY- SL001603 - Incorporated on 7 January 1991 
- DAVIES & DONALD LIMITEDActive - Proposal to Strike off- 08205674 - Incorporated on 7 September 2012 
- DONALD MONAHAN LTDDissolved- 04799354 - Dissolved on 21 September 2010 
- EMMA DONALD LIMITEDDissolved- SC377102 - Dissolved on 26 September 2014