- ALE&IONUT LTD- 16561818 - Incorporated on 5 July 2025 
- IONISKE LTD- 13124630 - Incorporated on 11 January 2021 
- MIREL ION LTD- 14839595 - Incorporated on 2 May 2023 
- GFUHA ION LTDDisolved- 15029606 - Dissolved on 31 December 2024 
- IONUT CZI LTDActive - Proposal to Strike off- 10723581 - Incorporated on 13 April 2017 
- ION&CLEAN LTDDisolved- 14013932 - Dissolved on 5 September 2023 
- ION CLOUD LTDDisolved- 14191655 - Dissolved on 3 June 2025 
- IONSTAR LTDActive - Proposal to Strike off- 08015704 - Incorporated on 2 April 2012 
- D.G. IONESCU LTDActive - Proposal to Strike off- 07666437 - Incorporated on 13 June 2011 
- IONA CLUB LTD.Dissolved- SC216770 - Dissolved on 18 April 2014 
- IONUT & SUN LTD- 08310345 - Incorporated on 28 November 2012 
- ION CIRTU LTDActive - Proposal to Strike off- 08512812 - Incorporated on 1 May 2013 
- IONA TECH LTD- 09182685 - Incorporated on 20 August 2014 
- ION CRETU LTDDisolved- 12862365 - Dissolved on 21 February 2023 
- ION SOIMU LTDActive - Proposal to Strike off- 12336964 - Incorporated on 27 November 2019 
- ENE IONUT LTDActive - Proposal to Strike off- 11262649 - Incorporated on 19 March 2018 
- RISCO ION LTDActive - Proposal to Strike off- 10314642 - Incorporated on 5 August 2016 
- IONA EI (SLP) II LP- SL023432 - Incorporated on 3 November 2015 
- LOLA IONA LTDActive - Proposal to Strike off- 10496831 - Incorporated on 25 November 2016 
- INNO ION UK LTD- 11863970 - Incorporated on 6 March 2019