- IONALIS LTDActive - Proposal to Strike off- 11006593 - Incorporated on 11 October 2017 
- IONASCU LTDDisolved- 13947237 - Dissolved on 8 August 2023 
- IONA COLL LTDDisolved- 14491712 - Dissolved on 30 April 2024 
- IONA 21 LIMITED- 08623509 - Incorporated on 24 July 2013 
- MEGAN IONA LTDDisolved- 12318616 - Dissolved on 7 November 2023 
- SKYLA-IONA LTD- 14717016 - Incorporated on 8 March 2023 
- IONA FILMS LTD- 10597860 - Incorporated on 2 February 2017 
- IONA SHELL LTD.Active - Proposal to Strike off- SC263117 - Incorporated on 9 February 2004 
- IONA RENEWABLES- CS002842 - Incorporated on 15 June 2017 
- CIG MON CYMRU LIMITEDDissolved- 03579278 - Dissolved on 9 December 2014 
- IONA ENTERPRISES- NI037509 - Incorporated on 6 December 1999 
- J.P FRANCES LIMITEDDisolved- 12671451 - Dissolved on 24 May 2022 
- IONA DAVIS LTD- 10275455 - Incorporated on 13 July 2016 
- I IONA LIMITEDDisolved- 12391222 - Dissolved on 17 May 2022 
- IONA1972 LIMITEDActive - Proposal to Strike off- 07755795 - Incorporated on 30 August 2011 
- IONABARS LTDActive - Proposal to Strike off- 06706473 - Incorporated on 24 September 2008 
- IONA BRUCE LTDDisolved- SC608633 - Dissolved on 7 December 2021 
- IONA NW (SLP) GP LLPActive - Proposal to Strike off- SO305547 - Incorporated on 30 November 2015 
- IONA VOICE LTD- 12456226 - Incorporated on 11 February 2020 
- IONA EI (SLP) III LP- SL032101 - Incorporated on 1 August 2017