• 1990 - PETPLAN Baugesellschasft mbH, founded in East Germany (Dresden) was put into operation . The company was especially engaged in the repair and renovation of old buildings. As the company received high demand, PETCOS Liegenschaftsverwaltungs und Dienstleistung GmbH was founded in Dresden and joined the venture as the third Turkish-German company.
• 1990 - PETAZER Azerittifak JOINT VENTURE COMPANY was established in Azerbaijan. (In 1994, the shares were transferred to the shareholders.)
• 1990 - PETOİL PETROL VE PETROL ÜRÜNLERİ ULUSLARARASI ARAMA VE İŞLETME INC. was established in order to carry out the oil activities in Azerbaijan.

•  1991 - A 50-50% share joint venture company with Azerbaijan National Petroleum Company AZNEFT AZERPETOİL was established. They became the first Turkish company to obtain the oil exploration and production rights abroad. More intense operations were carried out due to the oil and natural gas opportunities in the Commonwealth of Independent States.

• 1991 – In order to support these activities, a joint  venture, namely BAŞPETOIL JOINT VENTURE COMPANY was established with Bashkiria’s National Petroleum Company, BAŞNEFT.
• 1992 – PETBAU Baugesellschaft mbH that won the tender for the construction of 202 houses in Frankfurt, Heppenheim.
• 1993 - PETİMPEX DIŞ TİCARET VE YATIRIM LTD. was established in order to assist the export of  Peteks Inc. in Bulgaria to the East Block countries.
• 1993 – With the contributions of Geology and Natural Resources Defense Ministry of Kazakhstan, Turkish Petroleum Inc. and Petoil Inc., a joint venture, namely KAZAKTÜRKMUNAY Joint Venture Company, was formed for oil exploration and production purposes
• 1993 - PETPROJECT Gesellschaft für Planung von Hoch-und-Tiefbau mbH was established in order to conduct the businesses in Siberia and Germany.

History...