- oil and gas exploration, production, transportation, and distribution;
- power generation, transmission, and distribution; power design and engineering;
- telecommunications services.
Çalik Enerji has oil and gas exploration and production activities in Turkey, Iraq, Afghanistan, Azerbaijan, and Turkmenistan (notably in the Ýolöten Gas Field). It constructs together with Italian company Eni the Samsun-Ceyhan Pipeline to transport crude oil from the Black Sea to Mediterranean Sea. It also operates power plants in Turkey and Turkmenistan.
- Humber, Yuriy (4 June 2015). "Mitsubishi Corp Invests in Turkey’s Calik to Win Energy Orders". Bloomberg. Retrieved 5 June 2015.
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