Akkök Holding's companies operating in the energy industry are Akenerji, SEDAŞ, and Sepaş Enerji.

Akenerji is the first power generation company founded as an autoproducer group in Turkey. One of the biggest players in the Turkish energy industry, Akenerji is an integrated energy company operating in the wholesale energy trade as well as power generation, with over 25 years of experience. Akenerji has focused on generation investments based on renewable energy sources since 2005 to achieve resource diversity in energy generation. With the commissioning of its wind energy plants and hydroelectric plants, Akenerji has reached a generation capacity of 388 MW based on renewable energy resources. After the Erzin Natural Gas Combined Cycle Power Plant, which alone has the capacity to meet 3.1 percent of Turkey’s energy demand, was commissioned in July 2014, Akenerji’s total installed capacity reached 1,211 MW.

Sakarya Elektrik Dağıtım A.Ş. (SEDAŞ) is an electricity distribution company that provides energy distribution services for 1.9 million consumers and 3.7 million people 24 hours a day in 4 provinces, 45 districts, 1365 neighbourhoods and 765 villages in Sakarya, Kocaeli, Bolu, and Düzce provinces; which are highly industrialized and migration receiving cities. It operates within the AKCEZ joint venture established by Akkök Holding and the ČEZ Group, one of Europe's leading energy companies.

In addition to being the official supply company for Sakarya, Kocaeli, Bolu, and Düzce, Sepaş Energy provides electricity distribution services to 1.6 million customers across Turkey with a continuously expanding area of activity. Sepaş Energy has taken the supply and demand balance in the regional markets into account and offers its clients targeted, high quality, and innovative solutions with a fast turnaround time. The firm seeks to be a pioneer on the global level by staying a step ahead in the industry and creating sustainable values for its stakeholders.