- IONUT CIS LTD- 14834950 - Incorporated on 28 April 2023 
- IONUT ANS LTDDisolved- 13619239 - Dissolved on 7 March 2023 
- COSTIN DINCA LTDDisolved- 13255490 - Dissolved on 11 July 2023 
- COSTINMATEITRANS LTDDisolved- 14138320 - Dissolved on 7 November 2023 
- COSTINELBUSCA LTDDisolved- SC789538 - Dissolved on 4 February 2025 
- COSTIN TRANS LTDDisolved- 13772767 - Dissolved on 14 March 2023 
- SHAW COSTING LTDDisolved- 12707136 - Dissolved on 18 April 2023 
- COSTINELAS LTDDisolved- 14238281 - Dissolved on 19 December 2023 
- ION IONUT LTDActive - Proposal to Strike off- 11740642 - Incorporated on 24 December 2018 
- GEO IONUT LTDDisolved- 14569487 - Dissolved on 11 June 2024 
- IONUT CRL LTDDisolved- 14570065 - Dissolved on 11 June 2024 
- GVA IONUT LTDDisolved- 14746789 - Dissolved on 8 July 2025 
- COSTING CARE LTD- 12031183 - Incorporated on 4 June 2019 
- I.COSTINESCU LTDActive - Proposal to Strike off- 11073885 - Incorporated on 21 November 2017 
- COSTINELTRANSPORT LTDDisolved- 15212676 - Dissolved on 25 March 2025 
- PCE COSTING UK LTD- 15892742 - Incorporated on 12 August 2024 
- COSTIN MCKENZIE LIMITED- 04667516 - Incorporated on 17 February 2003 
- SIMON COSTIN LIMITED- 06173415 - Incorporated on 20 March 2007 
- COSTIN PROTECTION LTDActive - Proposal to Strike off- 08726403 - Incorporated on 10 October 2013 
- COSTIN CONSTRUCTION LTD- 12627997 - Incorporated on 28 May 2020