Insurance
EST 1 November 1984
STO 99.99% and MGPL 0.01%
Fuel
EST 18 December 2000
STO 99.99% and Allied 0.01%
Shipping
EST 4 February 2020
STO 99.99% and FSM 0.01%
Gas
EST 3 October 1999
STO 90% and Champa Oil & Gas 10%
Oil
EST 6 October 2003
Trading
EST 30 November 1997
STO 100%
Hospitality
EST 7 February 2012
Construction
EST 23 October 2000
STO 50% and Rainbow Enterprises 50%
EST 7 January 2002
STO 25% and Raysut (Oman) 75%
Free Zone
EST 7 January 2024
STO's share: 12.5%
Stock Exchange
EST 2008
STO's share: 10%