The following table illustrates STO's subsidiaries, associate companies and joint ventures and the investment STO has made in them.
|Allied Insurance Company Maldives pvt ltd||Subsidiary||99.9%||In 1985 as the first fully Maldivian insurance provider|
|Fuel Supplies Maldives pvt ltd||Subsidiary||99.9%||In 2001 to distribute oil for convenient public consumption|
|Maldive Gas pvt ltd||Subsidiary||90.0%||In 1999 to provide the public with a reliable and affordable supply of natural gas which has become a basic necessity|
|Maldives National Oil Company ltd||Subsidiary||99.9%||In 2003 to make additional foreign income for the country from international oil trade|
|Maldives Structural Products pvt ltd||Joint Venture||50.0%||In 2007 to manufacture and supply steel roofing products and accessories at affordable prices to the public|
|Lafarge Maldives Cement pvt ltd||Associate||25.0%||In 2002 with the aim of helping the construction industry with a steady supply of quality cement|
|STO Maldives (Singapore) pte ltd||Subsidiary||99.9%||In 1996 to engage in international trade|