- OCTAVIAN GERMANY LIMITEDDissolved- 06212017 - Dissolved on 23 November 2010 
- OCTAVIAN CONSULTANTS LTDActive - Proposal to Strike off- 08500022 - Incorporated on 23 April 2013 
- RADU OCTAVIAN LIMITEDActive - Proposal to Strike off- 08757882 - Incorporated on 1 November 2013 
- OCTAVIAN CIRLIG LIMITEDDisolved- 12671611 - Dissolved on 16 November 2021 
- OCTAVIAN GANEANU LIMITEDDisolved- 11835646 - Dissolved on 13 May 2025 
- OCTAVIAN SERVICES LTDActive - Proposal to Strike off- 09430768 - Incorporated on 10 February 2015 
- OCTAVIAN GIRLESCU LTDActive - Proposal to Strike off- 10097374 - Incorporated on 1 April 2016 
- OCTAVIAN ANTONY LIMITEDActive - Proposal to Strike off- 10126784 - Incorporated on 15 April 2016 
- OCTAVIAN HOLDINGS LIMITED- 14927214 - Incorporated on 9 June 2023 
- ALESSIO OCTAVIAN LTD- 15067553 - Incorporated on 13 August 2023 
- OCTAVIAN CONTINENTAL SOLUTIONS LIMITEDActive - Proposal to Strike off- 07679464 - Incorporated on 22 June 2011 
- CE SECURITY LIMITEDLiquidation- 05289636 - Incorporated on 17 November 2004 
- OCTAVIAN SECURITY (UK) LIMITEDActive - Proposal to Strike off- 05289692 - Incorporated on 17 November 2004 
- ADRIANA&ADRIANA LTDDisolved- 12210397 - Dissolved on 5 September 2023 
- OCTAVIAN IT LIMITED- 10153359 - Incorporated on 28 April 2016 
- OCTAVIAN ONICA LTDActive - Proposal to Strike off- 12343820 - Incorporated on 2 December 2019 
- EMANUEL-NICOLAE MORARU LIMITEDDisolved- 14992579 - Dissolved on 10 December 2024 
- OCTAVIAN SPEDITION LTDActive - Proposal to Strike off- 11494279 - Incorporated on 1 August 2018 
- OCTAVIAN LEARNING LTDDisolved- 11891620 - Dissolved on 20 May 2025 
- OCTAVIAN COMMUNICATIONS LIMITED- 12512805 - Incorporated on 11 March 2020